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Acidic sewage heavy metal trapping agent

A heavy metal scavenger, acid sewage technology, used in water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc. question

Inactive Publication Date: 2020-10-27
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical and chemical properties of sodium sulfide, sodium hydrosulfide and other vulcanizing agents used in the vulcanization method are unstable, and they are easy to decompose to produce hydrogen sulfide poisonous gas. The solution is easier to decompose in an acidic solution. Complicated ancillary facilities and other disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1, a heavy metal capture agent for acid sewage, made from the following parts by weight of raw materials: sodium dimethyl dithiophosphate 12-21; sodium dimethyl dithiocarbamate 6-10; sodium thiosulfate 3 -6; Trisodium phosphate 1-3; Sodium nitrite 0.2-0.5; Water 59.5-77.8. The heavy metal trapping agent includes sodium dimethyl dithiophosphate, sodium dimethyl dithiocarbamate, sodium thiosulfate, trisodium phosphate and sodium nitrite, which can be solid raw materials or in various concentrations Liquid raw materials, but the weight ratio of various raw materials of the configured acid sewage heavy metal capture agent remains unchanged.

Embodiment 2

[0015] Example 2, in the acidic sewage heavy metal capture agent described in Example 1, prepared from the following parts by weight of raw materials: sodium dimethyl dithiophosphate 12; sodium dimethyl dithiocarbamate 6; thiosulfuric acid Sodium 3; Trisodium Phosphate 1; Sodium Nitrite 0.2; Water 59.5.

Embodiment 3

[0016] Embodiment 3, the acidic sewage heavy metal capture agent according to embodiment 1 or 2, is made of the following parts by weight of raw materials: sodium dimethyl dithiophosphate 21; sodium dimethyl dithiocarbamate 10; sulfur Sodium sulphate 6; Trisodium phosphate 3; Sodium nitrite 0.5; Water 77.8.

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PUM

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Abstract

The invention relates to an acidic sewage heavy metal trapping agent, which is prepared from the following raw materials by weight: 12-21 parts of sodium dimethyl dithiophosphate; 6-10 parts of sodiumdimethyldithiocarbamate; 3-6 parts of sodium thiosulfate; 1-3 parts of trisodium phosphate; 0.2-0.5 part of sodium nitrite; and 59.5-77.8 parts of water . The preparation process is simple, the operation is easy, the acidic sewage heavy metal trapping agent can be effectively subjected to chemical reaction with heavy metals in acidic sewage with a pH value of 0-5 to generate insoluble substancesinsoluble in a dilute acid solution, and almost can capture various heavy metals including Cu<2+>, Cd<2+>, Hg<2+>, Pb<2+>, Mn<2+>, Ni<2+>, Zn<2+>, Cr<3+> and Co<3+>. Precipitation is rapid, and afterthe acidic sewage is treated, the solid-liquid separation is rapid, simple and convenient.

Description

Technical field [0001] The invention relates to the technical field of acid sewage treatment, and more specifically, to a heavy metal capture agent for acid sewage. Background technique [0002] Acidic sewage is the main water pollutant produced in the metal mineral smelting process. Typical acidic sewage such as acid and acid sewage from the acid system, initial rainwater from the sulfuric acid site and other sites in the production plant, hydrometallurgical workshop or heap leaching site, Leakage from the solution tank and tailings pond, or the leakage caused by heavy rain or dam breach at the above sites. Sour sewage usually contains relatively high free acid, and the pH value is lower than 5. Sour sewage also contains Cu 2+ , Cd 2+ , Hg 2+ , Pb 2+ , Mn 2+ , Ni 2 + , Zn 2+ , Cr 6+ , Co 2+ Such as various heavy metals, the content of heavy metal ions in some sewage solutions can reach 5-10g / L, which has a certain recovery value. In order to reduce environmental pollution caus...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F1/64C02F101/20C02F101/22C02F103/16
CPCC02F1/62C02F1/64C02F2101/20C02F2101/22C02F2101/206C02F2103/16
Inventor 王永斌王军张晓星吴克富贾启金高颖王进龙黄建芬张析吴斌周涛刘守信张红
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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