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Comprehensive zoning treatment method for soil heavy metal pollution

A technology of heavy metals and polluted areas, applied in the restoration of polluted soil, etc., can solve the problems of long duration, endangering human health, soil degradation, etc., and achieve the effect of reducing disposal costs, avoiding secondary pollution, and good remediation effect

Inactive Publication Date: 2016-03-16
成都绿源新创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metals in polluted soil include elements with significant biological toxicity such as Cd, Pb, Hg, Cr, As, and elements with certain toxicity such as Cu, Zn, Ni; this type of pollution has a wide range, long duration, hidden pollution, and cannot be Degradation will lead to soil degradation, decline in crop yield and quality, and pollute surface water and groundwater through runoff and leaching; excessive heavy metals will have adverse effects on plant physiological functions and cause nutritional imbalance; mercury and arsenic can inhibit nitrification in soil , Ammonifying bacteria activities, hindering nitrogen supply; heavy metals can be enriched through the food chain and generate more toxic methyl compounds, poisoning food chain organisms, and eventually accumulate in the human body, endangering human health

Method used

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  • Comprehensive zoning treatment method for soil heavy metal pollution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment one: if figure 1 As shown in Fig. 1, a method for comprehensive remediation of soil heavy metal pollution by area, including the following steps: area monitoring (1), pollution degree identification (2), site leveling in polluted areas (3), soil heavy metal pollution disposal and assessment monitoring (8);

[0025] Among them, the sub-regional monitoring (1) step: determine the monitoring items and divide the areas according to the soil environmental quality standards. Zn, Ni, for partition monitoring;

[0026] Pollution degree identification (2) step: Through sampling and analysis of the polluted area and the surrounding polluted area, determine the pollution degree of each area, and according to the monitoring results, the treatment is divided into: treatment of extremely heavily polluted areas (4), treatment of heavily polluted areas (5) Treatment of general polluted areas (6) and lightly polluted areas (7), in which the monitoring results are compared wi...

Embodiment 2

[0035] Embodiment 2: Take the waste residue with a weight of 100Kg and solidify it. First, crush and sieve the waste slag to make the particle size of the waste slag meet the molding requirements, then mix 1Kg of stabilizer and 100Kg of waste slag, after stirring evenly, carry out dry mixing with 40Kg of cement, and then gradually add 10Kg of water for overall mixing. The total time of mixing and stirring is about 5 minutes. Considering the feeding and discharging time, a mixing cycle is about 10 minutes; mold loading and vibration: put the mold on the ground of the forming area, apply the release agent, place it stably, and put it into the mold first Add 1 / 2 of the mixture, vibrate and compact, then fill up the mixture, continue to vibrate until there are no obvious air bubbles, and do not over-vibrate during vibration to cause "moulding"; demoulding: mold according to the mixture and smooth the bottom surface After the final setting of the concrete, it shall be covered in ti...

Embodiment 3

[0036] Example 3: Pollution degree identification (2) The evaluation is generally based on a single pollution index, with a small index causing light pollution and a large index causing heavy pollution. When the soil environmental quality in the area is compared with the outside area as a whole or with historical data In addition to the individual pollution index, the comprehensive pollution index is also commonly used. Due to the large differences in the regional background of the soil, the soil pollution accumulation index can better reflect the degree of man-made pollution of the soil. The soil pollutant share rate can be evaluated to determine the main pollution items of the soil. The pollutant share rate is sorted from large to small, and the priority of pollutants is also the same. In addition, statistics such as the multiple of soil pollution exceeding the standard and the rate of sample exceeding the standard can also reflect the environmental status of the soil. The c...

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Abstract

The invention discloses a comprehensive zoning treatment method for soil heavy metal pollution. The method sequentially includes the steps of zoning monitoring, pollution level identification, polluted area site leveling, soil heavy metal pollution disposal and evaluation monitoring, and specifically includes the steps that monitoring items and divided areas are determined according to soil environment quality standards; the pollution levels of all the areas are determined by conducting sampling analysis on polluted areas and surrounding pollution influence areas, and existing buildings and terraces in the polluted areas are dismantled and cleared away; the extra heavily polluted areas, the heavily polluted areas, the commonly polluted areas and the slightly polluted areas are treated; and finally, evaluation monitoring is conducted to obtain the soil heavy metal change conditions before and after the method is implemented, and the treatment effect is known in time. According to the method, the polluted areas are treated in a targeted mode, so that investment of human and financial resources for monitoring and treatment is reduced; the pollution levels are identified, the treatment areas are divided according to the pollution levels, and therefore recycling of heavy metal pollutants is facilitated, and the good treatment effect on heavy metal pollution can be achieved.

Description

technical field [0001] The invention relates to a method for comprehensive treatment of soil heavy metal pollution in different areas, and belongs to the technical field of soil treatment and environmental protection. Background technique [0002] With the rapid development of modern industrial and agricultural economy, the discharge of environmental pollutants is increasing day by day, and the situation of soil heavy metal pollution is becoming more and more serious. Soil heavy metal pollution refers to the pollution caused by excessive accumulation of heavy metals in soil. Soil heavy metal pollution refers to environmental pollution caused by heavy metals and their compounds. The mining of heavy metal mines and the utilization of their products are the hardest hit areas of heavy metal pollution and the source of global heavy metal pollution. For the mine environment, the main hazards of heavy metal pollution are For crops and people, heavy metals have a permanent and cumul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/00
Inventor 钟春红郑恒利
Owner 成都绿源新创环保科技有限公司
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