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Method for removing metal thallium in wastewater

A waste water and metal technology, applied in chemical instruments and methods, water pollutants, multi-stage water treatment, etc., can solve the problems of investment cost and lack of convenient operation and maintenance, and achieve the effect of convenient operation cost and convenient operation and maintenance.

Inactive Publication Date: 2015-04-22
HUNAN MUKUN ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has disadvantages in terms of investment cost and convenient operation and maintenance for the treatment of thallium-containing wastewater.

Method used

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  • Method for removing metal thallium in wastewater
  • Method for removing metal thallium in wastewater
  • Method for removing metal thallium in wastewater

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Embodiment Construction

[0017] The present invention can be further clearly understood through the specific examples of the present invention given below, but they are not intended to limit the present invention. Parts not described in detail in the specific embodiments are obtained by using prior art, known technical means and industry standards.

[0018] Unless otherwise stated, the percentages used in the present invention are all percentages by weight.

[0019] The method of the invention is adopted to treat the slag flushing circulating water (thallium-containing waste water) of Xiangxiang Jialian Zinc Industry Co., Ltd.

[0020] Xiangxiang Jialian Zinc Industry Co., Ltd. belongs to the non-ferrous metal smelting industry, mainly smelting zinc oxide; the main raw materials for production come from blast furnace gas mud and zinc smelting water-quenching slag. The production process: firstly, the gas mud, water-quenching slag, Combustion coal, etc. are crushed and then mixed in proportion and tra...

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Abstract

The invention discloses a method for removing metal thallium in wastewater, and the method is applicable to process wastewater with the thallium content of 0.05 mg / L or less. The method comprises the steps: step 1, oxidizing, namely, adding a strong oxidant into thallium-containing wastewater, so as to oxidize monovalent thallium ion in wastewater to form trivalent thallium ion; step 2, precipitating, namely, adding an alkali solution and adjusting the pH value to be 12 or more, so as to perform precipitation; and step 3, coagulating and adsorbing, namely, filtering, then adjusting pH of the filtrate to be 6-9, and pouring an adsorbent for coagulation and adsorption. The method is a comprehensive processing technology employing oxidation, precipitation and coagulation adsorption, is capable of guaranteeing the removal effect of thallium ion, has the removal rate of 97% or more, enables processed water to reach national discharge standard, also gives consideration to both investment and running cost, and is convenient for running and maintenance.

Description

technical field [0001] The invention relates to the technical field of thallium-containing wastewater treatment, and particularly discloses a method for removing metal thallium in wastewater. Background technique [0002] In recent years, the country and the government have increasingly recognized the hazards of thallium pollution. Thallium is a highly toxic element with accumulation properties. It is a strong neurotoxic substance and its toxicity is higher than that of lead and mercury. Relatively speaking, the environmental pollution caused by thallium is not as common as arsenic, cadmium, lead, mercury and other elements. At present, thallium has not been included in the monitoring scope of environmental protection departments at all levels, especially in the research of soil and water in my country. In addition, the toxicity of thallium to mammals is far greater than that of mercury, lead, and arsenic, and the lethal dose for humans is only 10-15 mg / kg. Thallium can ente...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/20
CPCC02F9/00C02F1/5236C02F1/5272C02F1/56C02F1/66C02F1/722C02F2101/20C02F2209/06C02F2301/08
Inventor 谢东翰何德文
Owner HUNAN MUKUN ENVIRONMENTAL PROTECTION
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