Heavy metal trapping agent for sewage treatment and preparation method thereof

A heavy metal scavenger, sewage treatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. and other problems, to achieve the effect of improving practical performance, high sedimentation speed and good effect

Inactive Publication Date: 2017-04-26
余姚市益群机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using these two methods to remove heavy metals in wastewater may cause the color of the water to become darker, causing secondary pollution, and basically has no treatment effect on complexed heavy metal wastewater
Although using

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] A heavy metal capture agent for sewage treatment. The raw materials in parts by weight include: 20 parts of sodium lignosulfonate, 5 parts of sodium tripolyphosphate, 10 parts of dichloroethane, 20 parts of soybean protein, 40 parts of potassium hydroxide, and urea 5 parts, 20 parts of carbon disulfide, 10 parts of crosslinking agent, 10 parts of montmorillonite, 2 parts of surfactant, 20 parts of ethylene diamine.

[0021] The method for preparing the heavy metal capture agent for sewage treatment, the specific steps are as follows:

[0022] (1) Weigh all raw materials in parts by weight;

[0023] (2) After activating the montmorillonite with an acid solution, wash it with deionized water for 3 times, until the pH value of the deionized water after cleaning is greater than 6.5; add deionized water and stir to prepare montmorillonite with a concentration of 15% by mass Suspension slurry

[0024] (3) Prepare the surfactant in deionized water to form a surfacta...

Example Embodiment

[0027] Example 2

[0028] A heavy metal capture agent for sewage treatment, according to parts by weight of raw materials: 25 parts of sodium lignosulfonate, 8 parts of sodium tripolyphosphate, 11 parts of dichloroethane, 25 parts of soy protein, 45 parts of potassium hydroxide, and urea 6 parts, 21 parts of carbon disulfide, 11 parts of crosslinking agent, 15 parts of montmorillonite, 3 parts of surfactant, 25 parts of ethylene diamine.

[0029] The method for preparing the heavy metal capture agent for sewage treatment, the specific steps are as follows:

[0030] (1) Weigh all raw materials in parts by weight;

[0031] (2) After activating the montmorillonite with an acid solution, wash it with deionized water for 4 times until the pH value of the deionized water after cleaning is greater than 6.5; add deionized water and stir to prepare a montmorillonite with a mass percentage concentration of 16% Suspension slurry

[0032] (3) Prepare the surfactant in deionized water into a surfa...

Example Embodiment

[0035] Example 3

[0036] A heavy metal trapping agent for sewage treatment, according to parts by weight of raw materials: 30 parts of sodium lignosulfonate, 10 parts of sodium tripolyphosphate, 12 parts of dichloroethane, 30 parts of soybean protein, 50 parts of potassium hydroxide, and urea 8 parts, 22 parts of carbon disulfide, 12 parts of crosslinking agent, 20 parts of montmorillonite, 4 parts of surfactant, 30 parts of ethylene diamine.

[0037] The method for preparing the heavy metal capture agent for sewage treatment, the specific steps are as follows:

[0038] (1) Weigh all raw materials in parts by weight;

[0039] (2) After activating the montmorillonite with an acid solution, wash it with deionized water for 5 times until the pH value of the cleaned deionized water is greater than 6.5; add deionized water and stir to make a montmorillonite with a concentration of 18% by mass Suspension slurry

[0040] (3) Prepare the surfactant in deionized water into a surfactant soluti...

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PUM

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Abstract

The invention discloses a heavy metal trapping agent for sewage treatment and a preparation method thereof. The heavy metal trapping agent for sewage treatment comprises, by weight, sodium lignin sulfonate, sodium tripolyphosphate, dichloroethane, soyabean protein, potassium hydroxide, urea, carbon disulfide, a cross-linking agent, montmorillonite, a surface active agent and ethidene diamine. The cross-linking agent is a compound of one, two or more of epoxy chloropropane, epoxy chlorobutane, glyoxal, malondialdehyde, glutaraldehyde, adipaldehyde and phthalic aldehyde. According to the heavy metal trapping agent for sewage treatment, the dual functions of trapping and flocculating can be similarly brought into play on low-concentration heavy metal sewage ion, practical performance of products is greatly promoted, the tripping capacity is high, the treatment effect of heavy metal with various forms is good, secondary pollution is avoided, and cost is low. The technique is simple, the sedimentation velocity is large, and stability is good.

Description

technical field [0001] The invention relates to the technical field of heavy metal treatment, in particular to a heavy metal scavenger for sewage treatment and a preparation method thereof. Background technique [0002] In today's industrial society, heavy metal wastewater comes from a wide range of sources, mainly from wastewater discharged from mining, smelting, electrolysis, electroplating, pesticides, medicines, paints, pigments and other enterprises. However, the heavy metal content and form of heavy metals in wastewater discharged from various industries are different, and the forms of heavy metals in wastewater discharged by a single enterprise may also be different, so it is difficult to use a single agent to remove heavy metals in wastewater. [0003] Among the existing agents for treating heavy metals in water, the most conventional Na2S or ferrous sulfate is generally added to the wastewater containing heavy metals, so that the heavy metals in the water are reduce...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/52C02F1/54C02F1/56C02F101/20
CPCC02F1/00C02F1/52C02F1/5236C02F1/54C02F1/547C02F1/56C02F2101/20C02F2305/04
Inventor 倪迪锋
Owner 余姚市益群机械厂
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