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Method for advanced purification of trace amount of thallium in water by using polymer-base nanometer manganese oxide

A deep purification, manganese oxide technology, applied in chemical instruments and methods, special compound water treatment, nanotechnology, etc., to achieve the effect of large processing capacity, fast adsorption speed, and filling technical gaps

Active Publication Date: 2011-09-07
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the special properties of thallium, it has not been well used to treat it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of trace thallium polluted water is pretreated and passed through a polyethylene adsorption column filled with polymer-based nano manganese oxide materials. Trace amount of thallium in polluted water Tl + The concentration is 400 μg / L, Tl 3+ Concentration is 50 μg / L, Ca 2+ The concentration is 20 mg / L, Mg 2+ The concentration is 25 mg / L, Na + The concentration is 35 mg / L, K + The concentration is 15 mg / L and the pH is 3.5. Add an appropriate amount of NaOH solution to adjust the pH value to 7, filter and apply to the column for adsorption. The specification of the adsorption column is Φ50×360 mm; it is filled with 100 mL (about 148 g) of wet polymer-based nano-manganese oxide material. The matrix of the material is D001 resin produced by Hangzhou Zhengguang Resin Co., Ltd. The resin skeleton is polystyrene-divinylbenzene, the crosslinking degree is 8%, and the specific surface area is 20.2 m 2 / g, the average pore diameter is 23.2 nm, the surface bonded su...

Embodiment 2

[0022] A kind of trace thallium polluted water is pretreated and passed through a polyethylene adsorption column filled with polymer-based nano manganese oxide materials. Trace amount of thallium in polluted water Tl + The concentration is 400 μg / L, Tl 3+ Concentration is 50 μg / L, Ca 2+ The concentration is 20 mg / L, Mg 2+ The concentration is 15 mg / L, Na + The concentration is 35 mg / L, K + The concentration is 15 mg / L and the pH is 3.5. Add an appropriate amount of NaOH solution to adjust the pH value to 7.5, filter and apply to the column for adsorption. The specification of the adsorption column is Φ50×360 mm; it is filled with 100 mL (about 148 g) of wet polymer-based nano-manganese oxide material. The matrix of the material is D001 resin produced by Hangzhou Zhengguang Resin Co., Ltd. The resin skeleton is polystyrene-divinylbenzene, the crosslinking degree is 8%, and the specific surface area is 20.2 m 2 / g, the average pore diameter is 23.2 nm, the surface bonded ...

Embodiment 3

[0025] A kind of trace thallium polluted water is pretreated and passed through a polyethylene adsorption column filled with polymer-based nano manganese oxide materials. Trace amount of thallium in polluted water Tl + The concentration is 450 μg / L, Tl 3+ Concentration is 50 μg / L, Ca 2+ The concentration is 20 mg / L, Mg 2+The concentration is 25 mg / L, Na + The concentration is 35 mg / L, K + The concentration is 15 mg / L and the pH is 3.5. Add an appropriate amount of NaOH solution to adjust the pH value to 5, filter and apply to the column for adsorption. The specification of the adsorption column is Φ50×360 mm; it is filled with 100 mL (about 135 g) of wet polymer-based nano-manganese oxide material. The matrix of the material is D001 resin produced by Hangzhou Zhengguang Resin Co., Ltd. The resin skeleton is polystyrene-divinylbenzene, the crosslinking degree is 8%, and the specific surface area is 20.2 m 2 / g, the average pore diameter is 23.2 nm, the surface bonded sul...

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Abstract

The invention discloses a method for the advanced purification of a trace amount of thallium in water by using polymer-base nanometer manganese oxide, and belongs to the field of the crossing of water environmental management and a nanometer technology. The method comprises the following steps of: regulating the pH value of the water polluted by the trace amount of thallium to be between 5 and 8.5, and filtering; allowing the treated water to pass through a packed tower or a filter bed filled with the polymer-base nanometer manganese oxide, so that the thallium in the water is adsorbed onto ananometer composite material selectively; and stopping adsorbing until the adsorbed thallium in the water reaches a leakage point, performing desorption regeneration on the packing of the polymer-base nanometer manganese oxide by taking HCl and Ca(NO3)2 mixed solution as a desorption agent, wherein the regenerated packing can be used repeatedly. In the method, when the concentration of positive ions such as Ca<2+>, Mg<2+>, Na<+>, Si(IV) and the like which coexist in the water is far higher than that of the thallium, the advanced treatment of the trace amount of the thallium in the water and the safety control over water quality still can be realized, so that the thallium content in the water is reduced from the range of between 0.01 and 0.5 mg / L to less than 0.1 microgram / L. The nanometercomposite material has high operation adsorption capacity, and can be regenerated completely and recycled.

Description

technical field [0001] The invention relates to a method for deep purification of trace thallium in water, more specifically, a method for deep purification of trace thallium in water by using a nano-manganese oxide composite material with high adsorption capacity and selectivity for thallium. Background technique [0002] As a natural component of the earth's crust, thallium exists widely in various environmental media, and its content is generally low. However, human activities such as mining and metal smelting often increase the concentration of thallium in local waters and soils. Thallium has strong cumulative toxicity, the lethal dose for adults is 10-15 mg / kg, and its toxic effect on mammals is far greater than that of Hg, Pb, As, etc. Excessive intake of thallium can cause hair loss, diarrhea, muscle wasting, permanent damage to the nervous system, etc. In view of the high toxicity of thallium, the US EAP stipulates that the maximum residual amount of thallium in dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/28
CPCC02F2305/08C02F1/62C02F2303/16B82Y30/00C02F2001/425C02F1/283C02F1/288C02F1/66C02F1/281B01J20/28059B01J20/06B01J20/28007B01J20/321B01J20/3221B01J20/3236B01J20/3293B01J20/0222B01J20/28052B01J20/28083
Inventor 吕路万顺利潘丙才张炜铭安东
Owner NANJING UNIV
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