Heavy metal polluted wastewater treatment agent, and preparation method and application thereof

A waste water treatment, heavy metal technology, applied in water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, water pollutants, etc., can solve the problem of large molecular weight of corn peptide, difficult flocculation, and low utilization efficiency of chelating groups and other issues, to achieve the effect of wide sources of raw materials and cheap prices

Inactive Publication Date: 2020-08-07
李洪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a heavy metal polluted wastewater treatment agent and its preparation method and application. The corn peptide modified by sodium dithiocarbamate is a modified corn peptide with a sodium dithiocarbamate group. There are many kinds of polymer compounds that can chelate heavy metals, such as amino groups, hydroxyl groups, sulfhydryl groups, and dithiocarbamate groups. Therefore, corn peptides modified with sodium dithiocarbamate The chelation site of corn peptide and metal is increased, so that it can chelate most heavy metal ions, including copper ions, lead ions, nickel ions, zinc ions, ferrous ions, iron ions, cadmium ions, chromium ions, etc. On the one hand, the corn peptide modified by sodium dithiocarbamate has a large molecular weight, and the precipitated flocs generated after chelating with heavy metals are large and have good settling performance, and it also has a certain flocculation effect. Compound use solves the problem of low utilization efficiency of the chelating group of the polymer chelating agent, and also solves the problem of difficult flocculation caused by the simple use of small molecular chelating agents, and the problem that the chelated molecules are still suspended in the system and difficult to precipitate; On the other hand, corn peptide modified by sodium dithiocarbamate and disodium EDTA are both water-soluble chelating agents, which are more environmentally friendly

Method used

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  • Heavy metal polluted wastewater treatment agent, and preparation method and application thereof

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Effect test

Embodiment 1

[0020] Composition of raw materials (parts by weight): 15 parts of corn peptide modified by sodium dithiocarbamate, 13 parts of sodium carbonate, 11 parts of calcium hydroxide, and 12 parts of disodium EDTA.

[0021] Corn peptide modified by sodium dithiocarbamate is prepared by the following method: dissolve 30g corn peptide and 10g (0.25mol) NaOH solid in 1000mL water, slowly add 0.225mol CS in a cold water bath 2 , control the reaction temperature below 40°C, after the dropwise addition, raise the temperature to 40°C and stir for 1 hour to obtain the corn peptide modified by sodium dithiocarbamate, with a yield of 85% based on corn peptide.

[0022] The preparation method of heavy metal polluted wastewater treatment agent is characterized in that it comprises the following steps: dissolving corn peptide modified by sodium dithiocarbamate in water, adding sodium carbonate while stirring at 500r / min to form solution A; mixing disodium EDTA Dissolve in water, heat up to 40°C, ...

Embodiment 2

[0024] Composition of raw materials (parts by weight): 20 parts of corn peptide modified by sodium dithiocarbamate, 17 parts of sodium carbonate, 15 parts of calcium hydroxide, and 25 parts of disodium EDTA.

[0025] Corn peptide modified by sodium dithiocarbamate is prepared by the following method: dissolve 50g corn peptide and 10g (0.25mol) NaOH solid in 1000mL water, slowly add 0.275mol CS in a cold water bath 2 , control the reaction temperature below 40°C, after the dropwise addition, raise the temperature to 60°C and stir for 3 hours to obtain corn peptide modified by sodium dithiocarbamate, with a yield of 90% based on corn peptide.

[0026] The preparation method of heavy metal polluted wastewater treatment agent is characterized in that it comprises the following steps: dissolving corn peptide modified by sodium dithiocarbamate in water, adding sodium carbonate while stirring at 700r / min to form solution A; mixing disodium EDTA Dissolve in water, heat up to 60°C, add...

Embodiment 3

[0028] Composition of raw materials (parts by weight): 17 parts of corn peptide modified by sodium dithiocarbamate, 14 parts of sodium carbonate, 12 parts of calcium hydroxide, and 15 parts of disodium EDTA.

[0029] The corn peptide modified by sodium dithiocarbamate is prepared by the following method: dissolve 35g corn peptide and 10g (0.25mol) NaOH solid in 1000mL water, slowly add 0.24mol CS in a cold water bath 2 , control the reaction temperature below 40°C, after the dropwise addition, raise the temperature to 45°C and stir for 2 hours to obtain the corn peptide modified by sodium dithiocarbamate, with a yield of 89% based on corn peptide.

[0030] The preparation method of heavy metal polluted wastewater treatment agent is characterized in that it comprises the following steps: dissolving corn peptide modified by sodium dithiocarbamate in water, adding sodium carbonate while stirring at 550r / min to form solution A; mixing disodium EDTA Dissolve in water, heat up to 45...

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Abstract

The invention provides a heavy metal polluted wastewater treatment agent. The heavy metal polluted wastewater treatment agent contains sodium dithiocarbamate modified corn peptide. The preparation method of the sodium dithiocarbamate modified corn peptide comprises the following step: enabling corn peptide to react with CS2 and NaOH to generate the sodium dithiocarbamate modified corn peptide. Theheavy metal wastewater treatment agent provided by the invention solves the problems of high heavy metal wastewater treatment difficulty, high treatment cost and complicated actual operation, and iswide in raw material source, low in price, convenient to use and low in treatment cost.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a heavy metal-polluted wastewater treatment agent and its preparation method and application. Background technique [0002] As early as the early 1950s, the environmental pollution of heavy metals has attracted widespread attention from all over the world. Especially the "Minamata disease" caused by mercury pollution in Japan and the "bone pain disease" caused by cadmium pollution, as well as the Some European countries have successively discovered the serious consequences of heavy metal pollution, making the research on heavy metal pollution and its prevention and control more important. Heavy metal waste comes from a wide range of industries, involving mining, metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. On the other hand, with With the in-depth study of heavy metal toxicology and the development of detection technology,...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F101/20
CPCC02F1/56C02F2101/20
Inventor 李洪
Owner 李洪
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