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Thallium-containing wastewater strongly oxidizing, coagulating, adsorbing and recovering process

A technology of adsorption recovery and strong oxidation, which is applied in the improvement of process efficiency, oxidized water/sewage treatment, water pollutants, etc. Large, easy to recycle and reuse, low application cost

Active Publication Date: 2015-01-28
HUNAN JINGYUAN ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the cost of chemical water treatment in the future will become higher and higher, mainly because the sludge formed by sedimentation will cause groundwater pollution, that is, secondary pollution sources, which will cause permanent pollution of water sources and be more difficult to control

Method used

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  • Thallium-containing wastewater strongly oxidizing, coagulating, adsorbing and recovering process
  • Thallium-containing wastewater strongly oxidizing, coagulating, adsorbing and recovering process

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specific Embodiment 1

[0057] The strong oxidative coagulation process of thallium-containing wastewater strong oxidative coagulation and adsorption recovery process includes the following steps:

[0058] (1) Concentrate thallium-containing wastewater: Concentrate complex thallium-containing acidic wastewater and production seepage water into the wastewater pool. The wastewater mainly comes from the production process of heavy non-ferrous metal ore (including associated ore), smelting, and non-ferrous chemical industry. Produced; thallium-containing wastewater that poses serious hazards to the surrounding environment and water bodies, and even endangers the lives of local residents.

[0059] (2) pH adjustment: complex thallium-containing acidic wastewater and collected production seepage water enter the pH adjustment tank, and the pH is controlled within 9.2 to 9.5, because the optimum condition for Tl oxidation is pH greater than 8.5, and the optimal pH of the oxidation reaction is controlled at 9.2...

specific Embodiment 2

[0090] A total of 100kg of thallium-containing acidic wastewater was treated by the coagulation and adsorption recovery process of thallium-containing wastewater. The comparison table of each heavy metal content in thallium-containing acidic wastewater and the content of various metals in water after coagulation and adsorption treatment is as follows:

[0091]

[0092]

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Abstract

The invention provides a thallium-containing wastewater strongly oxidizing, coagulating, adsorbing and recovering process. The process includes the following procedures: thallium-containing wastewater concentration, pH regulation, strong oxidization, coagulation, flocculation, precipitated sludge treatment, pH regulation, solid impurity filtration, removal of Zn, Pb, Cd and Tl, and the like. The process has the beneficial effects that the process has the advantages of advanced technology, maturity, good effluent quality, stability in operation, conciseness in process, strong practicability, easiness in start and stop, convenience in maintenance and management, small investment, low operating cost, small floor area for construction, short construction period and large application ranges of projects; treatment of heavy metal ion polluted sewage is not limited by temperatures; the limitation that a biological method can not be used in cold regions in the north can be overcome.

Description

technical field [0001] The invention belongs to the field of heavy metal ion wastewater treatment, and relates to advanced purification treatment technology of thallium-containing wastewater, including the treatment of complex thallium-containing wastewater and trace thallium-containing wastewater of various heavy metal ions, and more specifically relates to strong oxidation coagulation and adsorption recovery of thallium-containing wastewater craft. Background technique [0002] Thallium, symbol Tl, is a slightly bluish, silver-white soft metal, insoluble in water and alkali, and easily soluble in acid; it is a rare element existing in nature, with an average content of 1mg / kg in the earth's crust. Thallium is an associated element, almost never ore-forming alone, and mostly exists in sulfur ores of lead, zinc, iron, tin-copper and other metals in the form of dispersed isocrystalline impurities, and is often recovered and extracted as a by-product of metal smelting. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C22B7/00
CPCC02F1/001C02F1/281C02F1/5209C02F1/66C02F1/76C02F9/00C02F11/122C02F2101/20C02F2209/06C02F2301/08C02F2305/02C22B7/006Y02P10/20
Inventor 赵建成唐贤军景凤湘杨三妹肖培
Owner HUNAN JINGYUAN ENVIRONMENTAL ENG
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