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Medium material for removing underground water heavy metal arsenic pollution and preparation method of medium material

A medium material and heavy metal technology, applied in the direction of water pollutants, polluted groundwater/leachate treatment, water/sewage treatment, etc., can solve the problems of short service life, low removal rate, poor repair effect, etc., to achieve service life Long-term, high adsorption activity effect

Active Publication Date: 2015-09-02
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the medium materials for removing heavy metal arsenic mainly include activated carbon, zero-valent iron, bentonite, zeolite, etc., but these materials generally have disadvantages such as poor repair effect and short service life, especially for multivalent heavy metal arsenic. (III) has a low removal rate and often requires pre-oxidation pretreatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Fully mix 2kg of manganese ore particles (0.5-2cm), 400g of sepiolite (0.5-2cm), 1.5kg of corn stalks with a length of 3cm, 350g of cow dung, and 400g of activated sludge, and continuously add 20g of liquid An active bacterial agent prepared by manganese oxidizing bacteria and 5g liquid lignocellulose degrading bacteria. After mixing evenly, put the mixture into a composting reactor for composting. The composting time is 30 weeks. The composting time is 30 weeks, and the composting is performed every 4 days in the first 10 weeks; Turn over once a day. When turning over each time, spray water so that the moisture content of compost raw materials is always controlled at about 60%. After the composting is completed, put the composted product into the retort for carbonization. The final temperature of carbonization is controlled at about 380°C, and the total carbonization time is 8 hours.

[0025] The prepared 50kg medium material was used as the active medium material of...

Embodiment 2

[0027] Fully mix 5kg of manganese ore particles (0.5~1cm), 2kg of sepiolite (1~3cm), 2.5kg of corn stalks with a length of 4cm, 1.5kg of cow dung, and 1.2kg of activated sludge. 60g of liquid manganese-oxidizing bacteria and 15g of liquid lignocellulose-degrading bacteria are configured as active bacterial agents. After mixing evenly, put the mixture into a composting reactor for composting. The composting time is 36 weeks. The composting time is 36 weeks, and the composting is performed every 4 days in the first 12 weeks; Turn over once a day. When turning over each time, spray water so that the moisture content of compost raw materials is always controlled at 60%. After the composting is completed, put the composted product into the retort for carbonization. The final temperature of carbonization is controlled at about 390°C, and the total carbonization time is 7 hours. After cooling, it is crushed and granulated to obtain a medium material with an average particle size of ...

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Abstract

The invention discloses a medium material for removing underground water heavy metal arsenic pollution. The medium material is prepared by mixing manganese ore, sepiolite, straw, animal waste, active sludge and active bacterial agent with the mass ratio of 1 to (0.2-0.5) to (0.5-1) to (0.2-0.4) to (0.2-0.4) to (0.0005 to 0.002), composting, carbonizing, and crushing so as to prepare the particle material with the average particle diameter of 1-3cm. The invention also discloses a method for preparing the medium material. The medium material can effectively remove arsenic with polyvalency in underground water, is long in service life, and cannot cause secondary pollution of underground water.

Description

technical field [0001] The invention belongs to the field of groundwater pollution restoration in the field of environmental protection, and in particular relates to a medium material for removing heavy metal arsenic pollution from groundwater. [0002] The present invention also relates to a preparation method of the above-mentioned dielectric material. Background technique [0003] Heavy metal arsenic is the main pollutant in groundwater. In recent years, due to the development of industry, a large number of industrial wastewater discharges such as mining, coal burning, papermaking, and pigments have caused a sharp increase in the content of heavy metal arsenic in groundwater, seriously affecting human health and ecological environment. . Arsenic exists mainly in the form of inorganic arsenic As(III) and As(V) in the groundwater environment, and the toxicity of the former is about 60 times that of the latter. [0004] Among various groundwater remediation technologies, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58C02F1/72
CPCC02F1/288C02F2103/06B01J20/22B01J20/3078B01J20/3028B01J20/3021C02F2101/103C02F1/28C02F1/72
Inventor 姜永海席北斗廉新颖杨昱马志飞徐祥健李娟孟繁华
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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