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Composite reagent for deep removal of heavy metals in wastewater and preparation method thereof

A compound agent and heavy metal technology, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of insufficient sewage treatment capacity, single function, lack, etc., achieve performance improvement, increase specific surface area , the effect of performance improvement

Active Publication Date: 2014-01-01
ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used heavy metal remover has a relatively single function, and its ability to treat sewage with various heavy metal pollutants is insufficient, especially in the comprehensive sewage advanced treatment process.

Method used

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  • Composite reagent for deep removal of heavy metals in wastewater and preparation method thereof
  • Composite reagent for deep removal of heavy metals in wastewater and preparation method thereof
  • Composite reagent for deep removal of heavy metals in wastewater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A composite agent for deep removal of heavy metals in wastewater and a preparation method thereof, comprising the following preparation steps:

[0056] (1) Weigh 5000g of attapulgite, put it into a mixer with a spiral inversion function, then add 6250g of 2mol / L sulfuric acid, heat it to 70°C in an airtight manner, stir at a constant temperature for 2 hours, wash it with water until the pH value reaches 6, and then Drying at 120°C is acid-modified attapulgite. Weigh 2000g of the acid-modified attapulgite, crush it through a small ball mill and pass through 100 sieves, weigh 500g of the pulverized attapulgite powder and add it to a high-speed nano pulverizer, control the particle size parameter to 80nm, and weigh the nano-scale attapulgite. Add 250g of soil powder into a 2L constant temperature reaction kettle, add 240g of water, raise the temperature to 50°C under stirring and keep the constant temperature, drop in 10g of surfactant (polyethylene glycol 400) from the fe...

Embodiment 2

[0061] A composite agent for deep removal of heavy metals in wastewater and a preparation method thereof, comprising the following preparation steps:

[0062] (1) Weigh 2000 g of attapulgite powder after acid modification according to the modification method in Example 1, pass through 100 sieves after being pulverized by a small ball mill, weigh 500 g of pulverized attapulgite powder and add it to a high-speed nano pulverizer, control The particle size parameter is 50nm, weigh nano-scale, add 250g of attapulgite powder into a 2L constant temperature reaction kettle, add 290g of water, raise the temperature to 70°C under stirring conditions and keep the constant temperature, drop in the surfactant (polyethylene glycol) from the feeding port Alcohol 400) 10g, then stirred for 30min to make it fully mixed to prepare attapulgite powder suspension solution with a mass fraction of 45.5%.

[0063] (2) Keep the temperature of the reactor in step (1) at 70°C and constant temperature, a...

Embodiment 3

[0067] A composite agent for deep removal of heavy metals in wastewater and a preparation method thereof, comprising the following preparation steps:

[0068] (1) Weigh 2000 g of attapulgite powder after acid modification according to the modification method in Example 1, pass through 100 sieves after being pulverized by a small ball mill, weigh 500 g of pulverized attapulgite powder and add it to a high-speed nano pulverizer, control The particle size parameter is 100nm, weigh 300g of attapulgite powder into a 2L constant temperature reaction kettle, add 240g of water, raise the temperature to 40°C under stirring conditions and keep the constant temperature, drop in the surfactant (polyethylene glycol) from the feeding port Alcohol 400) 10g, then stirred for 30min to make it fully mixed to prepare attapulgite powder suspension solution with a mass fraction of 54.5%.

[0069] (2) Keep the temperature of the reactor in step (1) at 40°C and constant temperature, add 300g of wate...

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Abstract

The invention discloses a composite reagent for deep removal of heavy metals in wastewater and a preparation method thereof. The composite reagent is prepared from the following raw materials in parts by weight: a component A including 20-30 parts of modified attapulgite powder, 30-50 parts of a modified natural high molecular polymer and 0-3 parts of a surfactant; a component B namely an inorganic flocculating agent, wherein the weight ratio of the component A to the component B is (2.5-8.3):1. The composite reagent disclosed by the invention has very strong adsorption, chelating and flocculation performances on heavy metal ions in water, has a plurality of effects of auxiliary reduction of COD (chemical oxygen demand), decoloration, dephosphorization and the like at the same time, and is good in treatment effect, and the preparation method is simple and easy.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite agent for deep removal of heavy metals in wastewater and a preparation method thereof. Background technique [0002] The Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution puts forward specific targets for the prevention and control of heavy metal pollution during the Twelfth Five-Year Plan period. By 2015, the discharge of heavy metal pollutants such as lead, mercury, chromium, cadmium, and , 15% less than that in 2007, the discharge of key heavy metal pollution in non-key areas will not exceed the level in 2007, and heavy metal pollution will be effectively controlled. [0003] The method of dosing chemicals has been proved to be one of the effective methods to remove heavy metal pollutants in sewage discharge. At present, the commonly used heavy metal removers have relatively single functions, and their ability to tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/62C02F1/28C02F1/52
Inventor 王付超张刚蒋涛韦彦斐梅荣武李欲如沈浙萍许青兰
Owner ENVIRONMENTAL SCI RES & DESIGN INST OF ZHEJIANG PROVINCE
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