58 results about "Inorganic mercury" patented technology

The invention relates to the field of sewage treatment, in particular to a treatment method of mercury-polluted water. The mercury-polluted water treatment process mainly comprises pretreatment and mercury removal, wherein the pretreatment is as follows: pretreatment is carried out on the collected polluted water, the suspended matter concentration in the water body is less than or equal to 100mg/L; mercury removal is as follows: (1) inorganic mercury is removed; (2) mercury and mercuric salt are removed by adsorption; secondary adsorption is carried out by an obligate zeolite and hydroxide radical activated carbon, wherein the hydroxide radical activated carbon further adsorbs inorganic mercuric salts in the polluted water; (3) mercury and mercuric salts are removed by ion exchange, and final treatment is carried out on mercury in the polluted water, so as to enable mercury ions in the treated polluted water to reach mercury discharge limit value 0.5mug/l. In the invention, the process is simple, organic mercury and inorganic mercury in the polluted water can be thoroughly removed effectively, so as to enable the mercury-containing concentration to reach emission standards.

The invention discloses a mercury morphological analysis method based on liquid cathode discharge and a mercury vapor generating device. The method comprises: a mercury-containing sample solution is introduced into a chromatographic column of a liquid chromatograph; a discharge medium carrier flow passes through a sample introduction device and is introduced into a sample introduction capillary tube of a discharge pool with the effluence of the chromatographic column through a tee joint; by taking a metal electrode as an anode, and graphite, platinum or a stainless steel material as a cathode, liquid cathode discharging is carried out to generate vapor which is carried by a carrier gas into a gas-liquid separator; and finally the separated gas is detected by an atomic fluorescence spectrometer to obtain the morphology of mercury. Through the method provided by the invention, organic mercury and inorganic mercury in an object to be detected are effectively separated and detected; and the method has the advantages of small volume, low energy consumption, high mercury vapor generation efficiency and low matrix interference, is simple in operation and can be used for analyzing the morphology of mercury in a biological sample.

The invention discloses a method for reducing mercury content in rice. By means of a bonding retardant technology, bio-availability mercury content in a growth medium can be reduced from the early growth stage of the rice, nutrient materials such as selenium, sulphur, iodine or ammonium can be supplemented in a rice field exposed to mercury for a long time, absorption of mercury of rice roots is fully reduced, transfer of mercury from the rice roots to aboveground parts is retarded, and content of total mercury and methyl mercury in the rice is reduced. The method is convenient to implement, low in cost and capable of reducing the content of inorganic mercury and methyl mercury in tissues of the rice in mercury polluted areas effectively. In addition, by means of supplementation of an appropriate amount of selenium in the rice field exposed to the mercury for a long time, the bio-availability mercury content in soil can be reduced, and effective selenium content in the soil is greatly increased so as to be favorable for crop growth and improving agricultural product quality. The method has important practical significance for food safety and human health of people in the areas exposed to the mercury for a long time and peripheral areas.

An apparatus and method for the detection and quantitation of metals and metalloids in a sample by derivatization are provided. In particular, the apparatus and method relates to analysis of mercury in a sample by derivatization of the inorganic and organic mercury species into elemental mercury and organo-mercury hydrides using sodium borohydride.

The invention discloses an efficient liquid chromatogram-atomic fluorescence spectrum method for measuring mercury forms, and belongs to environment analysis technology. The efficient liquid chromatogram-flame atomization-atomic fluorescence spectrum-based method for measuring the mercury forms of methyl mercury, bivalent inorganic mercury, ethyl mercury and the like comprises that: after multiple mercury forms are separated by efficient liquid chromatogram, the mercury is mixed with acid and hydroboron in turn, the organic mercury is converted into hydrogenated organic mercury, the hydrogenated organic mercury is subjected to gas-liquid separation, mercury atoms are further converted in the argon-hydrogen flame, and the mercury is measured by adopting an atomic fluorescence spectroscope. A device for implementing the method comprises a liquid chromatogram pump, a chromatogram column, a peristaltic pump, a three-way valve, a gas-liquid separator, a flame atomizer, the atomic fluorescence spectroscope and a polytetrafluoroethylene tube. The method does not need to use strong oxidant such as potassium sulfate and the like after column treatment or use degradation equipment of ultraviolet, microwave and the like, has the advantages of simple instruments, convenience for operation and environment friendliness, and is suitable for form analysis of the mercury in environments and biological samples.

The present invention relates to a preparation method and application of a high selectivity ultrasensitive inorganic mercury / organic mercury ion fluorescent probe. In particular, the probe is a dimethylamino thioformate naphthalimide compound, which can be used as an inorganic mercury / organic mercury ion fluorescent probe for the detection of mercuric ions. The probe can achieve at least one of the following technical effects: high selectivity identification of inorganic mercury ions / organic mercury ions; rapid response to mercury ions; real-time detection of mercury ions; stability for long-term storage and usage; assistance in the for mercury ion detection of actual samples; and strong anti-interference ability.

The invention discloses a mercury-free diaphragm paper for a laminated cell, which is composed of a substrate and a coating, wherein, the coating is composed of a solid polymer electrolyte and bismuth chloride which is an inorganic mercury-substitute inhibiter; the solid polymer electrolyte is prepared by coordinated ionic liquid and PVA, PAM and starch; the coordinated ionic liquid is prepared by heating and melting urea, thiourea, zinc butter and ammonium chloride according to a certain proportion. The inorganic mercury-substitute inhibiter, bismuth chloride, in the coating of the invention can form a dense covering layer on the surface of a zinc electrode and form a good metallic film, thus realizing inhibition effect, reducing the discharge resistance of the battery and improving the capacity of the battery.

The invention discloses a method for detecting methyl mercury, ethyl mercury and inorganic mercury in water of an aquaculture pond. The method comprises the following steps: adding CH2Cl2 into a sample, carrying out vortex shake and centrifugation, taking out a sedimentary phase, adding L-cysteine into the sedimentary phase, extracting, centrifuging, and then removing supernatant liquid to obtain the sample to be detected; preparing the sample to be detected into 2-20 micrograms/L of liquid to be detected, and then detecting by a high performance liquid chromatography (HPLC)-cold vapor generation atomic fluorescence system. The method adopts a vortex-assisted liquid-liquid microextraction way to carry out pretreatment on the aquaculture pond water sample for the first time, thus solving the problems that the sample matrix is complicated, interference is serious, the method is lack of sensitivity, and the like; HPLC separation and sequential injection-cold vapor generation atomic fluorescence system (SI-CVAFS) sample introduction are utilized, so that the method fills into the blank of analyzing the methyl mercury, the ethyl mercury and the inorganic mercury in water of the aquaculture pond at the same time; the method has the characteristics of being simple and rapid in operation, low in cost, environment-friendly, efficient, high in enrichment efficiency, remarkable in interference resistance, high in precision and accuracy, low in detection limit, and the like.

The invention discloses an extraction method for mercury compounds in fish flesh. The extraction method comprises the following steps: preparing a fish flesh sample, adding a mercapto reagent for extraction, carrying out centrifugation, taking supernatant and carrying out filtering so as to obtain extract with enriched mercury compounds, wherein the mercapto reagent has a pH value of 3.0 to 8.0, optimally 4.0. According to the extraction method, the mercapto reagent is used as the only extraction reagent for extraction of mercury forms in the fish flesh sample; extraction steps are simple; the usage amount of the extraction reagent is low; and the method realizes simple high-efficiency low-toxicity extraction of mercury compounds in three forms, i.e., methyl mercury, ethyl mercury and inorganic mercury, from the fish flesh sample. The invention also discloses a detection method for the mercury compounds in fish flesh. The detection method needs no other operation and realizes analysis by directly injecting the obtained extract into a high performance liquid chromatography-cold vapor generation atomic fluorescence spectroscopy system; and the detection method can rapidly, accurately, stably and sensitively detect the mercury compounds in the three forms, and is applicable to promotion and application.

The invention relates to a treatment method for waste water containing mercury in PVC production through a calcium carbide process. The treatment method comprises the following steps that the waste water containing the mercury is collected into a sedimentation basin, large-grain sediments in the waste water are subjected to sedimentation treatment, waste water containing the mercury after sedimentation treatment is pumped into a filtering pretreatment device to conduct filtering pretreatment through a conveying pump, waste water containing the mercury after filtering pretreatment is conveyed into a coagulating sedimentation reactor, a sodium sulphide solution and an inorganic flocculant are successively added into the coagulating sedimentation reactor, and HgS flocculent precipitation is generated and naturally precipitated; filtering clear liquid after reaction sedimentation is conveyed into an ultrafiltration device, the filtering clear liquid sequentially passes through a mercury-removing resin film and a material filling column loaded with mercury-removing filling and is subjected to joint absorption treatment of inorganic mercury and organic mercury again, and ultrafiltration clear liquid is generated; and the ultrafiltration clear liquid is conveyed into a saline water separation device to conduct concentration desalination, and finally, fresh water which conforms to the national standard is discharged into a water storing tank to store for later use through a saline water separation device.

The invention discloses a method for detecting methyl mercury, ethyl mercury and inorganic mercury in aquatic feed. The method comprises the following steps: drying an aquatic feed sample and preparing the sample into powder; adding L-cysteine; after vibrating and centrifuging, extracting supernatant liquid and filtering to prepare a sample to be detected; preparing the sample to be detected into a solution to be detected with the concentration of 10 micrograms/L by using the L-cysteine, and detecting by using a high performance liquid chromatography-cold steam generation atom fluorescence spectrophotometer. According to the method disclosed by the invention, the L-cysteine is used as an only extracting agent for mercury forms in the aquatic feed; the various forms of the mercury can be simply, rapidly and reliably extracted from the aquatic feed with a complicated base body by adopting a vibration and separation extraction form; after the extraction is finished, extra operations are not needed and an extracting solution is directly injected into the high performance liquid chromatography-cold steam generation atom fluorescence spectrophotometer to be analyzed; compared with reported methods, the method is simple and rapid, reagents are green and toxin-free, and the method is accurate and sensitive and has low detection limit.

The invention discloses an inorganic mercury-substituting inhibitor for prolonging a storage life of a zinc air battery. The inhibitor is compounded by a plurality of inorganic compounds, comprises two or a plurality of anion groups selected from SnO3<2->, CL<->, SO4<2->, OH<->, NO4<->, SiO3<2->, PO4<3-> and two kinds or several kinds in citrate, and further comprises one to five kinds of cations: Y<3+>, <Bi3+>, <In3+>, <Ca2+>, <Ce4+>, <Na+>, La<3+> and <Ag+>. The inhibitor provided in the invention can completely replace mercury in the zinc air battery without affecting work performance of the battery. After storing zinc electrode added with the inhibitor and the zinc electrode containing 6% of the mercury at a temperature of 50 plus or minus 1 DEG C for the same time, the two electrodes are put in the zinc air battery with the same model to test discharge performance of the battery, the result is that the two electrodes have a fairly equal discharge performance.

The invention provides a detecting device and method for detecting flow injection chemiluminescence water inorganic mercury by inhibiting, aims to solve the problems that in the prior art, analyzing time is long, conditions are rigorous, energy consumption is high, secondary pollution can be produced, concentration of ozone is unstable and lighting efficiency is low and the like. According to the device, hydrophobic transparent material is coated on on the upper portion on the inner face of a dynamic ozone solution balancing pipe close to the face of a ultraviolet tube, and a plurality of reflectors are arranged on the lower portion. By the aid of the scheme, dissolved ozone is precipitated rarely when the ozone solution flows through a dynamic ozone solution balancing chamber, stability of ozone concentration is guaranteed, and lights are reflected to the solution through the prismatic reflectors to improve ozone-dissolving lighting efficiency. The detecting device used for detecting the inorganic mercury in water has the advantages of scene, rapidness, convenience and flexibility.

The invention discloses a treatment process of mercury-containing production waste water from exploitation of natural gas field, Which comprises the following steps: 1)pretreating; 2)performing micro electrolysis treatment; 3)performing catalytic oxidation treatment; 4)performing flocculation and deposition; 5)performing anaerobic treatment; 6)performing aerobic treatment; and 7)performing secondary deposition. The treatment process of the present invention has the beneficial effect that 1) poisonous and harmful substances such as inorganic mercury and alkyl mercury in waste water of oil and gas field can be removed through physicochemical treatment, difficultly degraded organic matters in waste water can be simultaneously degraded, so that good condition can be created for following biochemical treatment; 2)a baffle plate anaerobic reactor is used for performing an anaerobic reaction and time-delay aeration activated sludge technology for treating waste water in the natural gas field, chemical oxygen demand can be removed, microscale mercury can be simultaneously removed, the processed effluent can reach primary standard of a GB8978-1996 sewage comprehensive discharge standard; 3)alkyl mercury can be converted to inorganic mercury by employing the catalytic oxidation technology, and 4)the process is simple and stable, the processed effluent can accord with the standard.

The invention provides a simple and convenient preparation method of a novel graphene oxide/iron and manganese oxide composite material for removing inorganic mercury in water. The preparation method comprises the following steps of: sequentially adding a ferrous sulfate solution and a potassium permanganate solution into a graphene oxide suspension, mixing uniformly, regulating the pH to 7.5, stirring and standing, thereby obtaining graphene oxide/iron and manganese oxide composite material turbid liquid. The graphene oxide is compounded with iron and manganese oxides, so that agglomeration of iron and manganese oxide particles is prevented, and the removal effect of inorganic mercury (Hg<2+>) in water is obviously improved. The material is capable of promoting the growth of wheat seedlings and rice seedlings and simultaneously reducing the biotoxicity of the mercury. The novel graphene oxide/iron and manganese oxide composite material has the advantages of simple process, stable effect, wide application range, environmental friendliness and no secondary pollution, and has wide application prospect in the aspect of restoring from heavy metal pollution in water and soils.

The invention provides a detecting device and method for detecting flow injection chemiluminescence water inorganic mercury, aims to solve the problems that in the prior art, an ozone solution is easy to decompose, on-site operation cannot be performed, analyzing time is long, analyzing process is complicated, conditions are rigorous, energy consumption is high, secondary pollution can be produced and the like. A catalyst of ruthenium trichloride is filled into a dynamic ozone solution balancing pipe; when the ozone solution flows into the dynamic ozone solution balancing pipe, the catalyst of the ruthenium trichloride is irradiated by a fluorescent light, the ozone in the ozone solution is inhibited from generating hydroxyl radicals, the ozone solution is stable and decompose rarely, and stability of the ozone solution is improved. The detecting device used for detecting the inorganic mercury in water has the advantages of scene, rapidness, convenience and flexibility.

The invention relates to a sensor assembly to detect and quantify organic and/or inorganic mercury compounds, including elemental mercury that may be present in gases or liquids, such as natural gas, air, condensates, crude oil, refined petroleum gas or liquids, and water including connate water, condensed water and water containing hydrate inhibitor(s). The sensor assembly includes a housing having a flow channel defined by an inlet, a sensor array, and an outlet. The sensor array is based on the differential sorption properties measured using a surface acoustic wave (SAW) sensor array, a chemiresistor array, or a combination of the two.

The invention belongs to the technical field of soil restoration, and discloses a preparation method of a rice mercury absorption inhibitor. The rice mercury absorption inhibitor comprises biomass charcoal; a preparation method of the biomass charcoal comprises the following steps: pyrolyzing and carbonating a biomass charcoal raw material in a pyrocarbonizing furnace under the condition of introducing nitrogen; cooling and then taking out the pyrolyzed and carbonated biomass charcoal raw material, and storing the pyrolyzed and carbonated biomass charcoal raw material in a drying device, wherein the pyrolyzing temperature is 400 to 600 DEG C, and the pyrolyzing time is 1 to 4 hours; the invention also discloses an application method of the rice mercury absorption inhibitor; nitrogen fertilizer, phosphate fertilizer and potassium fertilizer are taken as base fertilizer; the rice mercury absorption inhibitor and the base fertilizer are overturned and buried at the position of 1 to 15 cmfrom a mercury polluted soil plough layer; and after rice is planted, the nitrogen fertilizer is applied in a tillering stage and a heading period. The rice mercury absorption inhibitor disclosed by the invention can absorb methyl mercury and Hg<2+> in the soil, can also reduce the content of active mercury in the mercury polluted soil, can also effectively reduce the enrichment of inorganic mercury in rice, and effectively inhibits the adsorption of the rice to the methyl mercury; and the content of the methyl mercury in rice is reduced by 73 percent.

The invention relates to a method for decreasing methyl mercury content in rice. The method comprises the steps that on the condition of planting rice in a flooded mode, inorganic selenium salt or a mixture of inorganic selenium and sulfate is applied to soil at least 20 days before the rice is planted to decrease the methyl mercury content in rice, wherein in terms of total selenium, the content of the inorganic selenium salt in per kg of soil is 2-3 mg, and the content of the sulfate is 2 times that of the sulfate in soil. According to the method, on the condition that the rice is planted in the flooded mode, inorganic selenium and inorganic mercury are mainly utilized for forming inert mercury on the anaerobic condition to decrease the methyl mercury content in soil; meanwhile, sulfate reduction causes sulfide generation, the bio availability of methyl mercury in soil can be decreased to a certain degree, and then the methyl mercury content in rice is decreased. In order to avoid potential soil selenium pollution risk caused by high selenium using amount, the total selenium applying amount is not larger than 2-3 mg/kg in the method.

The invention relates to a sensitive high-selectivity colorimetric probe capable of identifying inorganic mercury and organic mercury simultaneously. Particularly, the probe is a benzothiazole compound taking vinyl ether as a recognition receptor, and can be used for detection of mercury ions. The probe can realize at least one of the technical effects of high-selectivity identification of inorganic mercury ions/organic mercury ions, instant detection of mercury ions and naked-eye detection; the probe is stable in performance, can be preserved and used for a long time, is beneficial to detection of mercury ions in practical samples, and has high antijamming capability.

The invention discloses a recombinant plasmid for eliminating industrial wastewater mercury pollution, a construction method, a recombinant engineering bacterium and an application. The recombinant plasmid is established by inserting tobacco chloroplast rrn16 gene strong promoter, ribosome binding site conserved sequence of 5'UTR sequence of escherichia coli T7 phage gene 10, 3'-end non-coding area of tobacco chloroplast rps16 gene, enterobacter aerogenes polyphosphate kinase gene ppk and pseudomonas K-62 strain on the basis of plasmid pET28a and by eliminating mer operon of merA and merG. Organic mercury and inorganic mercury in wastewater are transferred into bacterial cells through merT-merP, the organic mercury is degraded into divalent mercury through merB1 and merB2, the divalent mercury is chelated into the cells through ppk, the toxicity of mercury to the bacteria cells is reduced, mercury in the wastewater is accumulated inside the bacterial cells, and mercury pollution in the waster is eliminated through collecting the recombinant engineering bacteria.

The invention is applicable to the technical field of biological detection, and provides a method for determining organic mercury in food by combining an ion chromatography with an inductively coupledplasma mass spectrometer. The method comprises the steps of: performing pre-treatment on a sample; separating methyl mercury, ethyl mercury, and inorganic mercury in the sample by the ion chromatography; sending the sample into the inductively coupled plasma mass spectrometer for analysis to obtain spectrograms of the methyl mercury, the ethyl mercury, and the inorganic mercury; the operating parameter of the ion chromatography comprises duration 260-270s; the operating parameters of the inductively coupled plasma mass spectrometer comprises: RF Power 1550W; atomizing gas 0.95 to 1.15L/min; QCell Gas 3.35 to 5.50mL/min; Collision Mode Voltage: 3.0V; and Residence Time 200 to 220ms; and finally, preparing a working curve, and calculating the detection limit. According to the method for determining organic mercury in food by combining the ion chromatography with the inductively coupled plasma mass spectrometer, the detection limit of organic mercury in the food is low, and the analysissensitivity is high; the detection equipment is stable and high in precision; the operation is simple; and the cost is low.

The invention discloses a method for detecting inorganic mercury and organic mercury in water by a solid-phase extraction-mercury analyzer and belongs to the technical field of environment detection. The method comprises the following steps: 1) regulating the pH (Potential of Hydrogen) of a water sample; 2) after adjusting the pH, carrying out solid-phase extraction and enrichment on the water sample; 3) detecting by utilizing a mercury analyzer; and 4) analyzing a result. The method for detecting inorganic mercury and organic mercury in water by the solid-phase extraction-mercury analyzer is simple, convenient and rapid to operate, high in sensitivity and good in selectivity; the use amount of an organic solvent is less, and a toxic reagent is not used; and the sensitivity and the selectivity on mercury with different shapes can still keep a relatively good level. The quality accuracy of inorganic mercury and organic mercury is smaller than 0.1ppb, the detection limit is 0.01mu g/L-10mu g/L, and the fortified recovery is 90%-100%.

The invention provides a method and device for extracting mercury forms in grain and application thereof. The method comprises the following steps that a grain sample and an L-cysteine solution are uniformly mixed, the mercury forms are extracted after ultrasonic crushing, insoluble substances are removed, and supernatant is taken fir measurement. The method for extracting the mercury forms in thegrain is rapid, simple and convenient, and an extracting solution can be used for simultaneously measuring total mercury, inorganic mercury, methyl mercury and other mercury forms; a sample does notneed to be soaked overnight, no acid-base solvent is used, heating digestion before machine detection or adjustment of the pH value of the extracting solution is not needed, the extracting solution isL-cysteine and has no harm to the human body and environment, the mercury forms in the sample can be extracted by utilizing ultrasonic crushing for 5 minutes, and the extraction rate can reach 95% orabove.

The invention discloses a composite treating agent for waste water treatment of oil and gas fields. The composite treating agent is characterized by comprising, by weight, 10-20 parts of poly dimethyldiallyl ammonium chloride, 5-10 parts of polyaspartic acid, 8-12 parts of modified polyacrylamide, 5-10 parts of dithiocarbamic acid grafted chitosan, 1-5 parts of hexadecyl trimethyl ammonium bromide, 3-6 parts of nano scrap iron, 3-6 parts of methyl alcohol, 3-6 parts of sodium-based bentonite, 4-8 parts of SA630 heavy metal collectors, 3-5 parts of polyaluminium sulfate, 1-3 parts of sulfur-carrying activated carbon balls and 1-2 parts of oxidizing agents. The composite treating agent has the advantages that colloids are agglomerated, deposited and separated under the action of charge neutralization, adsorption bridging and enrichment, oil, nitrates, heavy metal ions and suspended solids in sewage are removed, the composite treating agent has obvious removal effect on toxic and harmfulsubstances such as inorganic mercury and alkyl mercury in the waste water of the oil and gas fields, majority of the mercury in original water can be removed effectively, organic matters difficult todegrade in the waste water are degraded, and the composite treating agent is not likely to cause secondary pollution to the environment.