Pollution degree judgment method based on various indexes of ocean seawater

Abstract

The invention relates to the technical field of marine environment monitoring, in particular to a pollution degree judgment method based on various indexes of ocean seawater, which comprises the following steps: establishing a seawater pollution degree early warning model; inputting the pollution detection indexes into a seawater pollution degree early warning model, and judging whether the physical indexes are within a physical index threshold range or not; if the physical index is within the physical index threshold range, judging that the physical property of the seawater is normal, and judging whether the chemical index is within the chemical index threshold range; if the chemical index is within the chemical index threshold range, judging that the chemical property of the seawater is normal, judging whether the biological index is within the biological index threshold range, and if the biological index is not within the biological index threshold range, determining the seawater pollution degree by combining the physical index and the chemical index; and if the biological index is within the biological index threshold range, judging that the seawater is pollution-free. The method is clear in data comparison sequence, efficient, comprehensive and high in accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of marine environment monitoring, and in particular to a method for judging the pollution degree based on various indicators of marine water. Background Art

[0002] Seawater pollution indicators are the fundamental basis for assessing the severity of seawater pollution and implementing pollution control measures. Seawater contains a complex composition of pollutants, which can be qualitatively and quantitatively assessed through analytical testing methods. Seawater pollution indicators can generally be categorized into three categories: physical, chemical, and biological. Physical pollution indicators include temperature, color, and salinity. Changes in water temperature can reflect thermal pollution in the marine environment, such as localized temperature increases caused by industrial emissions. Changes in seawater color can also indicate the levels of suspended and dissolved organic matter, and are sometimes associated with algal blooms. Chemical pollution indicators include pH, nitrogen and phosphorus, COD, and perfluorinated compounds. Changes in seawater pH can affect the physiological functions and living environment of marine organisms, contributing to marine pollution. In addition to the inherent properties of seawater, organisms are sensitive to seawater pollution. Low concentrations or trace amounts of pollutants enter seawater and accumulate in organisms. Monitoring biological indicators in seawater can help detect marine pollution in a timely manner and initiate early pollution control measures.

[0003] Currently, there is no method for assessing the extent of marine pollution that can simultaneously reflect the normality and degree of contamination of physical, chemical, and biological indicators. While traditional physical indicator sensors can capture data such as seawater temperature, salinity, and depth, they lack the ability to integrate real-time analysis with chemical and biological indicator data. For example, if an abnormally high water temperature is detected, it is difficult to quickly combine chemical indicators to determine whether the pollution is caused by industrial hot wastewater discharge, nor can it be linked to biological indicators to understand the immediate impact on marine life. Chemical indicator sensors, such as COD and nutrient sensors, can only detect a single or a few chemical substances, failing to systematically and comprehensively assess the extent of seawater chemical contamination. Furthermore, their isolation from physical and biological indicator data makes it impossible to construct a comprehensive assessment system. For example, when excessive heavy metal levels in seawater are detected, the lack of supporting physical environmental parameters and biological response data makes it difficult to accurately determine the pollution's spread and the extent of the ecological damage. For biological indicator monitoring, while immunosensors and acoustic tags can capture information on pollutant levels and biological activity in organisms, these data cannot be effectively integrated with physical and chemical indicators, resulting in a lack of comprehensive assessment of the health of marine ecosystems. For example, abnormal activity of a certain marine organism may be discovered through acoustic tags, but due to the lack of synchronous physical and chemical environmental data, it is difficult to determine whether it is caused by environmental pollution or changes in natural habits.

[0004] Based on the above technical problems, the present invention provides a method for judging the pollution degree based on various indicators of ocean water. Summary of the Invention

[0005] In response to the above-mentioned technical problems, a method for determining the degree of pollution of ocean water based on various indicators is provided. The present invention is primarily based on marine environmental parameters and the physical and chemical properties of ocean water, as well as biological behavioral responses. With the support of a variety of marine environmental monitoring sensors, marine biosensors, data acquisition systems, and computers, it achieves the technical effect of accurately determining the degree of pollution of ocean water.

[0006] The technical means adopted in the present invention are as follows:

[0007] A method for determining the degree of pollution based on various indicators of ocean water comprises the following steps:

[0008] Establish a seawater pollution warning model and determine the thresholds of physical, chemical, and biological indicators based on the marine environment;

[0009] Collecting pollution detection indicators of the marine environment, including physical indicators, chemical indicators and biological indicators of seawater;

[0010] Inputting the pollution detection index into a seawater pollution degree early warning model to determine whether the physical index is within the physical index threshold range; if not, determining the seawater pollution degree by combining chemical and biological indicators;

[0011] If the physical indicator is within the physical indicator threshold range, the physical properties of the seawater are judged to be normal, and if the chemical indicator is not within the chemical indicator threshold range, the degree of seawater pollution is determined by combining the physical and biological indicators;

[0012] If the chemical indicator is within the chemical indicator threshold range, the chemical properties of the seawater are judged to be normal, and whether the biological indicator is within the biological indicator threshold range is judged. If it is not within the biological indicator threshold range, the degree of seawater pollution is determined by combining the physical and chemical indicators;

[0013] If the biological indicator is within the biological indicator threshold range, it is determined that the seawater is not polluted.

[0014] Furthermore, the physical indicators include temperature, color, salinity, pH value, and chlorophyll content; the chemical indicators include nitrogen and phosphorus content, chemical oxygen demand, and perfluorinated compound content; and the biological indicators include pollutant content, activity rate, and metabolic rate in organisms in seawater.

[0015] Furthermore, when determining whether the chemical indicator is within the chemical indicator threshold range, the value of the perfluorinated compound content in the chemical indicator is compared with the value of the risk level to determine the risk level of the perfluorinated compound to all aquatic organisms.

[0016] Furthermore, the threshold range of the physical indicator is specifically:

[0017] No pollution: temperature ±0.5℃, salinity ±0.05g / kg, chlorophyll ±0.1μg / L, PH ±0.2;

[0018] Mild pollution: temperature ±0.5℃-1.0℃, salinity ±0.1g / kg, chlorophyll ±0.5μg / L, pH ±0.2-0.5;

[0019] Moderate pollution: temperature ±1.0℃-2.0℃, salinity ±0.5g / kg, chlorophyll ±1μg / L, pH ±0.5-1;

[0020] Severe pollution: temperature > 2.0℃, salinity > 0.5g / kg, chlorophyll > 1μg / L, PH > 1.

[0021] Furthermore, the threshold range of the biological indicator is specifically:

[0022] No pollution: metabolic rate decreased by <30%;

[0023] Mild pollution: metabolic rate decreases by 30%-50%;

[0024] Moderate pollution: metabolic rate decreases by 50%-70%;

[0025] Severe pollution: metabolic rate decreased by >70%.

[0026] Furthermore, the physical indicators are obtained through marine environment monitoring sensors, the chemical indicators are obtained through marine chemical sensors, and the biological indicators are obtained through marine biosensors.

[0027] Furthermore, the pollution level of the perfluorinated compounds is determined using independent risk classification standards, specifically including:

[0028] No risk: = 0 ng / L;

[0029] Low risk: ≤2400 ng / L;

[0030] Moderate risk: >2400 ng / L and ≤23000 ng / L;

[0031] High risk: >23,000 ng / L;

[0032] Among them, no risk corresponds to no pollution of chemical indicators, low risk corresponds to light pollution, medium risk corresponds to moderate pollution, and high risk corresponds to heavy pollution.

[0033] Furthermore, the method further comprises: when it is determined that the seawater is slightly polluted, moderately polluted or severely polluted, the computer used for monitoring will display the word "pollution" to remind the user of the seawater pollution;

[0034] The physical indicator thresholds, chemical indicator thresholds, biological indicator thresholds, pollution detection indicators and pollution levels are stored in the database, and a data calling interface is provided.

[0035] Furthermore, the method for detecting perfluorinated compounds includes:

[0036] Take filtered seawater samples, add isotope-labeled internal standard solution, treat with mixed-mode anion exchange solid phase extraction column, activate with ammonia-containing methanol, methanol and water in sequence, rinse with ammonium acetate buffer solution, elute with methanol and ammonia-containing methanol, concentrate with nitrogen blow-through, and then redissolve for analysis.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] 1. The present invention establishes two categories, namely, excessive physical and chemical parameters of ocean water and abnormal biological behavior reactions, and a four-level structure. The data comparison sequence is clear, the levels are distinct, the efficiency is comprehensive, the accuracy is strong, and the operability is good.

[0039] 2. This invention integrates seawater physical indicators, chemical indicators, and biological indicators in multiple dimensions to achieve a comprehensive, real-time, and accurate assessment of the degree of seawater pollution, filling the gap in existing technologies in the collaborative assessment of seawater pollution levels using multiple indicators.

[0040] 3. The present invention provides more comprehensive and accurate data support and decision-making basis for marine environmental protection, pollution control and ecological restoration.

[0041] Based on the above reasons, the present invention can be widely promoted in fields such as marine environment monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0043] Figure 1 This is a flow chart of a pollution early warning method based on various ocean water indicators of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0045] like Figure 1 As shown, the present invention provides a method for judging the pollution degree based on various indicators of ocean water, specifically:

[0046] S1. Establish a seawater pollution level early warning model and determine the thresholds of physical indicators, chemical indicators, and biological indicators based on the marine environment.

[0047] S2. Collect pollution monitoring indicators of the marine environment. Pollution monitoring indicators include seawater physical indicators, chemical indicators and biological indicators.

[0048] Specifically, physical indicators include temperature, color, salinity, and chlorophyll content. Chemical indicators include pH, nitrogen and phosphorus content, chemical oxygen demand, and perfluorinated compound content. Biological indicators include the content of pollutants in organisms, activity rate, and metabolic rate. Marine hydrological parameters are collected in real time through marine hydrological environment monitoring sensors, chemical indicators are obtained through marine chemical sensors, and data on the behavioral responses of marine organisms are collected in real time through biosensor devices. This data is processed by computer to set four-level judgment thresholds for marine environmental parameters. A marine pollution degree judgment model based on the behavioral responses of marine organisms is established. The warning thresholds set are combined with national seawater grade standards and the current ecological and environmental status of the monitored sea areas.

[0049] Preferably, the marine hydrological environment monitoring sensor is a KNF-500 / G multi-parameter water quality sensor, the marine chemical sensor is a nutrient sensor and a COD sensor, and the biosensor is an immune sensor and an acceleration sensor.

[0050] Preferably, the experimental method for the content of perfluorinated compounds in seawater is:

[0051] A 500 ml seawater sample (filtered through a 0.22 μm glass fiber membrane) was added with an isotope-labeled internal standard solution and subjected to solid-phase extraction using a CNWBOND-WAX SPE (500 mg, 6 ml). The column was activated with 6 ml of methanol containing 0.28% ammonia, 6 ml of methanol, and 6 ml of water, followed by loading the sample. Following loading, the column was rinsed with 6 ml of 25 mM acetic acid / ammonium acetate buffer (pH 4.5) and 10 ml of water. Finally, the column was eluted with 15 ml of methanol, followed by 15 ml of methanol containing 0.28% ammonia, and then drained. All eluates were combined, concentrated to near dryness at 30°C under nitrogen, and reconstituted with LC-MS-grade methanol / water (1:1). The volume was adjusted to 500 μl for analysis.

[0052] S3. Input the pollution detection indicators into the seawater pollution degree early warning model to determine whether the physical indicators are within the physical indicator threshold range. If they are not within the physical indicator threshold range, the seawater pollution degree is determined by combining chemical indicators and biological indicators.

[0053] S4. If the physical indicators are within the physical indicator threshold range, the physical properties of the seawater are judged to be normal. If the chemical indicators are not within the chemical indicator threshold range, the degree of seawater pollution is determined by combining the physical and biological indicators.

[0054] Specifically, when comparing seawater chemistry, the perfluorinated compound concentration values ​​are compared to the risk level values ​​(referring to the Federal Water Quality Guidelines, Risk Levels of Short-Chain Chlorinated Paraffins in Water to All Aquatic Organisms) to determine the risk level of perfluorinated compounds in water to all aquatic organisms. Low risk: limited exposure levels with minimal potential effects on aquatic organisms, ≤ 2,400 ng / L; Medium risk: moderate exposure levels with potential effects on some aquatic populations, > 2,400 ng / L and ≤ 23,000 ng / L; High risk: high exposure levels with a serious threat to aquatic populations, > 23,000 ng / L.

[0055] S5. If the chemical indicators are within the chemical indicator threshold range, the chemical properties of the seawater are judged to be normal. If the biological indicators are not within the biological indicator threshold range, the degree of seawater pollution is determined by combining physical and chemical indicators.

[0056] S6. If the biological indicators are within the biological indicator threshold range, the seawater is judged to be unpolluted.

[0057] S7. When the seawater is judged to be slightly polluted, moderately polluted or severely polluted, the computer used for monitoring will display the word "pollution" to remind the user of the seawater pollution.

[0058] S8. Store parameter values, data and pollution levels in a database and provide a data calling interface.

[0059] As a preferred embodiment of the present invention, when the degree of seawater pollution is determined by combining chemical indicators and biological indicators, the higher degree of pollution is taken as the final conclusion; similarly, when the degree of seawater pollution is determined by combining physical indicators and chemical indicators, the higher degree of pollution is also selected as the final conclusion.

[0060] Example 1

[0061] like Figure 1 As shown, the present invention provides a method for judging the degree of pollution based on various indicators of marine water. The method was carried out in a certain area of ​​Bohai Sea. First, based on the historical data of the sea area, a four-level judgment threshold of the corresponding marine environmental parameters was established. Temperature, salinity, chlorophyll, and pH were selected as marine environmental parameters, and the metabolic rate of blue mussels was selected as a biological indicator of biological behavior response. The specific four-level judgment threshold range is:

[0062] Pollution-free range: temperature ±0.5℃, salinity ±0.05g / kg, chlorophyll ±0.1μg / L, PH ±0.2.

[0063] Light pollution range: temperature ±0.5℃-1.0℃, salinity ±0.1g / kg, chlorophyll ±0.5μg / L, PH ±0.2-0.5.

[0064] Moderate pollution range: temperature ±1.0℃-2.0℃, salinity ±0.5g / kg, chlorophyll ±1μg / L, PH ±0.5-1.

[0065] Severe pollution range: temperature > 2.0℃, salinity > 0.5g / kg, chlorophyll > 1μg / L, PH > 1.

[0066] Monitoring the current marine environmental parameters of the sea area using marine environmental sensors revealed a decrease in temperature, 0.4°C below the seasonal average; an increase in salinity, 0.01g / kg above the seasonal average; an increase in chlorophyll, ±0.02μg / L above the seasonal average; and a decrease in pH, below the seasonal average of 0.3. Based on the established thresholds, the physical properties of the seawater are normal (temperature changes are within the physical indicator thresholds), while the chemical properties are abnormal (salinity, chlorophyll, and pH changes exceed the chemical indicator thresholds). A comprehensive assessment based on the physical and biological behavior indicators of the seawater indicates that the level of seawater pollution in this area is considered mild.

[0067] Example 2

[0068] like Figure 1As shown, based on Example 1, the present invention also selects temperature, salinity, chlorophyll, and pH as marine environmental parameters, and the metabolic rate of blue mussels as a biological indicator of biological behavior response. The four-level judgment threshold range formulated according to the marine biological indicators is:

[0069] No pollution: The biological metabolic rate drops to less than 30% of the normal metabolic rate.

[0070] Mild pollution: The biological metabolic rate is reduced to 30%-50% of the normal metabolic rate.

[0071] Moderate pollution: The biological metabolic rate drops to 50%-70% of the normal metabolic rate.

[0072] Severe pollution: The biological metabolic rate drops to more than 70% of the normal metabolic rate.

[0073] according to Figure 1 Following the steps outlined above, marine environmental sensors confirmed that the physical and chemical properties of the water in the area were normal. Biosensors collected behavioral responses from marine organisms, and after analyzing abnormal data, they revealed a decrease in activity rates, with metabolic rates severely reduced to 60% of the normal rate. Statistical analysis confirmed that the level of water pollution in the area was moderate, indicating significant marine pollution.

[0074] Example 3

[0075] like Figure 1 As shown, based on Example 2, the present invention determines the risk level of perfluorinated compounds in water to all aquatic organisms. The specific risk level classification standards are:

[0076] No risk: PFC content corresponds to a PFC level of 0 ng / L.

[0077] Low risk: Exposure levels are limited with minimal potential effects on aquatic life, ≤ 2,400 ng / L.

[0078] Moderate risk: Exposure levels are moderate and may affect some aquatic populations, >2,400 ng / L and ≤23,000 ng / L.

[0079] High risk: Exposure levels are high, posing a serious threat to aquatic biota, >23,000 ng / L.

[0080] Among them, no risk corresponds to no pollution of chemical indicators, low risk corresponds to light pollution, medium risk corresponds to moderate pollution, and high risk corresponds to heavy pollution.

[0081] Experimental testing revealed that the content of perfluorinated compounds in seawater is 10 ng / L. Based on the above standards, the risk level of perfluorinated compounds in the water of this sea area to aquatic organisms is judged to be low risk.

[0082] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0083] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for judging the pollution degree based on various indicators of ocean water, characterized in that: The following steps are involved: Establish a seawater pollution warning model and determine the thresholds of physical, chemical, and biological indicators based on the marine environment; Collecting pollution detection indicators of the marine environment, including physical indicators, chemical indicators and biological indicators of seawater; Inputting the pollution detection index into a seawater pollution degree early warning model to determine whether the physical index is within the physical index threshold range; if not, determining the seawater pollution degree by combining chemical and biological indicators; If the physical indicator is within the physical indicator threshold range, the physical properties of the seawater are judged to be normal, and if the chemical indicator is not within the chemical indicator threshold range, the degree of seawater pollution is determined by combining the physical and biological indicators; If the chemical indicator is within the chemical indicator threshold range, the chemical properties of the seawater are judged to be normal, and whether the biological indicator is within the biological indicator threshold range is judged. If it is not within the biological indicator threshold range, the degree of seawater pollution is determined by combining the physical and chemical indicators; If the biological indicator is within the biological indicator threshold range, it is determined that the seawater is not polluted.

2. The method for determining the degree of pollution based on various indicators of ocean water according to claim 1, characterized in that: The physical indicators include temperature, chromaticity, salinity, pH value, and chlorophyll content; the chemical indicators include nitrogen and phosphorus content, chemical oxygen demand, and perfluorinated compound content; and the biological indicators include the pollutant content, activity rate, and metabolic rate in organisms in seawater.

3. The method for determining the degree of pollution based on various indicators of ocean water according to claim 1, characterized in that: When determining whether the chemical indicator is within the chemical indicator threshold range, the value of the perfluorinated compound content in the chemical indicator is compared with the value of the risk level to determine the risk level of the perfluorinated compound to all aquatic organisms.

4. The method for determining the degree of pollution based on various indicators of ocean water according to claim 2, characterized in that: The threshold range of the physical indicator is specifically: No pollution: temperature ±0.5℃, salinity ±0.05g / kg, chlorophyll ±0.1μg / L, PH ±0.2; Mild pollution: temperature ±0.5℃-1.0℃, salinity ±0.1g / kg, chlorophyll ±0.5μg / L, pH ±0.2-0.5; Moderate pollution: temperature ±1.0℃-2.0℃, salinity ±0.5g / kg, chlorophyll ±1μg / L, pH ±0.5-1; Severe pollution: temperature > 2.0℃, salinity > 0.5g / kg, chlorophyll > 1μg / L, PH > 1.

5. The method for determining the degree of pollution based on various indicators of ocean water according to claim 2, characterized in that: The threshold range of the biological indicator is specifically: No pollution: metabolic rate decreased by <30%; Mild pollution: metabolic rate decreases by 30%-50%; Moderate pollution: metabolic rate decreases by 50%-70%; Severe pollution: metabolic rate decreased by >70%.

6. The method for determining the degree of pollution based on various indicators of ocean water according to claim 2, characterized in that: The physical indicators are obtained through marine environment monitoring sensors, the chemical indicators are obtained through marine chemical sensors, and the biological indicators are obtained through marine biosensors.

7. The method for determining the pollution degree based on various indicators of ocean water according to claim 3, characterized in that: The pollution level of the perfluorinated compounds is determined by an independent risk classification standard, which specifically includes: No risk: = 0 ng / L; Low risk: ≤2400 ng / L; Moderate risk: >2400 ng / L and ≤23000 ng / L; High risk: >23,000 ng / L; Among them, no risk corresponds to no pollution of chemical indicators, low risk corresponds to light pollution, medium risk corresponds to moderate pollution, and high risk corresponds to heavy pollution.

8. The method for determining the pollution degree based on various indicators of ocean water according to claim 1, characterized in that: The method further includes: when it is determined that the seawater is slightly polluted, moderately polluted or severely polluted, the computer used for monitoring will display the word "pollution" to remind the user of the seawater pollution; The physical indicator thresholds, chemical indicator thresholds, biological indicator thresholds, pollution detection indicators and pollution levels are stored in the database, and a data calling interface is provided.

9. The method for determining the pollution degree based on various ocean water indicators according to claim 7, characterized in that: The detection method of the perfluorinated compound comprises: Take filtered seawater samples, add isotope-labeled internal standard solution, treat with mixed-mode anion exchange solid phase extraction column, activate with ammonia-containing methanol, methanol and water in sequence, rinse with ammonium acetate buffer solution, elute with methanol and ammonia-containing methanol, concentrate with nitrogen blow-through, and then redissolve for analysis.

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