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Chemical remover for treating heavy metal polluted wastewater as well as preparation method and application of chemical remover

A chemical removal and wastewater treatment technology, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of residual precipitant, secondary pollution, large usage, etc., to achieve Low cost, wide range of raw material sources, enhanced removal effect

Active Publication Date: 2021-01-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used chemical agents have the following problems: (1) the amount of use is large, and the amount of sludge produced is large; (2) heavy metal ions of different properties in the sewage cannot be removed at the same time; Coexist in polluted water bodies, but due to their different properties and adsorption competition, so far there is no single remover that can remove them at the same time. 3) Some precipitants remain in the water, which is easy to cause secondary pollution

Method used

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  • Chemical remover for treating heavy metal polluted wastewater as well as preparation method and application of chemical remover
  • Chemical remover for treating heavy metal polluted wastewater as well as preparation method and application of chemical remover
  • Chemical remover for treating heavy metal polluted wastewater as well as preparation method and application of chemical remover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Wash 10g of rice stalks in an ultrasonic cleaner for 10 minutes, dry and crush them, and pass through a 40-mesh sieve for later use; configure 0.1mol·L -1 of citric acid and Mn(NO 3 ) 2 solution, 18ml of Mn(NO 3 ) 2 Slowly add the solution into 10g of rice straw, slowly add 18ml of citric acid solution and 40ml of ultrapure water along the inner wall of the container and stir and mix continuously; under the action of a magnetic stirrer, stir the mixed solution at a rate of 300rpm for 120min, take out and stir After baking in a drying oven at 105°C in a constant temperature oven to constant weight; place the dried material in a sealed container, heat it to 550°C in a muffle furnace at a rate of 5°C / min and continue roasting for 180min, after the roasting is completed , cooled and ground through a 40-mesh sieve to prepare a waste water heavy metal remover.

[0045] Measure 100ml of lead, cadmium and arsenic contaminated wastewater, add 0.5g of the above remover, and mix...

Embodiment 2

[0047] Wash 10 g of rice straw in an ultrasonic cleaner for 10 minutes, dry and crush, pass through a 40-mesh sieve for later use; configure 0.05mol L -1 Oxalic acid and Fe(NO 3 ) 2 solution, 18ml of Fe(NO 3 ) 2 Slowly add the solution to 10g of rice straw, slowly add 18ml of oxalic acid solution and 40ml of ultrapure water along the inner wall of the container and stir and mix continuously; under the action of a magnetic stirrer, stir the mixed solution at a speed of 300rpm for 120min, take out the stirrer Finally, bake in a drying oven to a constant weight at 105°C in a constant temperature oven; place the dried material in a sealed container, heat it to 550°C in a muffle furnace at a rate of 5°C / min and continue roasting for 180min. After the roasting is completed, Cool and grind through a 40-mesh sieve to prepare a waste water heavy metal remover.

[0048] Measure 100ml of lead, cadmium and arsenic contaminated wastewater, add 0.4g of the above remover, and mix well. ...

Embodiment 3

[0050] Wash 10g of rice stalks in an ultrasonic cleaner for 10 minutes, dry and crush them, and pass through a 40-mesh sieve for later use; configure 0.1mol·L -1 of citric acid, Mn(NO 3 ) 2 solution and Fe(NO 3 ) 2 solution, 9ml of Mn(NO 3 ) 2 solution with 9ml of Fe(NO 3 ) 2 Slowly add the solution into 10g of rice straw, slowly add 18ml of citric acid solution and 40ml of ultrapure water along the inner wall of the container, and keep stirring and mixing; under the action of a magnetic stirrer, keep stirring the mixed solution at a rate of 300rpm for 120min, take out and stir After baking in a drying oven at 105°C in a constant temperature oven to constant weight; place the dry material in a sealed container, heat it to 550°C in a muffle furnace at a heating rate of 5°C / min and continue roasting for 180min. After the roasting is completed , cooled and ground through a 40-mesh sieve to prepare a waste water heavy metal remover.

[0051] Measure 100ml of lead, cadmium ...

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Abstract

The invention discloses a chemical remover for treating heavy metal polluted wastewater as well as a preparation method and application of the chemical remover. The preparation method comprises the following steps: mixing biomass powder with a solution containing an M source, adding a complexing agent solution while stirring to obtain a mixture, reacting, drying, and roasting to obtain the chemical remover, wherein the M source is selected from a manganese source and / or an iron source. According to the prepared chemical remover, the prepared chemical remover is added into lead, cadmium and arsenic polluted wastewater according to a certain mass ratio, the removal rates of available cadmium and lead are 95% or above and 90% or above respectively, and the removal rate of arsenic is 80% or above. According to the chemical remover, agricultural solid waste is fully utilized, the preparation process is simple, and the cost is low; and the prepared remover has a good removal effect on heavymetals, and can be used for treating lead, cadmium and arsenic polluted wastewater.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a chemical remover for the treatment of heavy metal polluted waste water, a preparation method thereof, and its application in the treatment of heavy metal polluted waste water. Background technique [0002] Fresh water is an important resource for the natural environment and agricultural production on which human beings depend. However, environmental pollution and ecological damage are becoming more and more serious, seriously affecting human health and survival, among which heavy metal elements have a particularly serious effect on environmental pollution and damage, and polymetallic wastewater treatment has become the focus of current environmental science research. [0003] At present, there are mainly several methods for the treatment of heavy metal sewage, such as physical and chemical methods, chemical methods, and biological methods. The physica...

Claims

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Application Information

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IPC IPC(8): C02F1/54C02F1/52C02F101/20
CPCC02F1/54C02F1/5236C02F2101/20
Inventor 杨志辉曾盖杨卫春高世康黄培成廖骐石岩
Owner CENT SOUTH UNIV
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