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Nano adsorbent for removing arsenic, stibium and fluorin in wastewater as well as preparation method and regeneration method of nano adsorbent

A nano-adsorption, adsorbent technology, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve problems such as failure to meet environmental protection requirements, and achieve good selectivity.

Active Publication Date: 2013-10-09
BEIJING GENERAL RES INST OF MINING & METALLURGY
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Problems solved by technology

[0003] The invention discloses a nano-adsorbent for removing arsenic, antimony and fluorine in wastewater, a preparation method and a regeneration method thereof, in order to solve the problem that the existing heavy metal wastewater treatment technology cannot meet the increasingly strict environmental protection requirements after treatment

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  • Nano adsorbent for removing arsenic, stibium and fluorin in wastewater as well as preparation method and regeneration method of nano adsorbent

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preparation example Construction

[0016] The embodiment of the present invention provides a method for preparing a nano-adsorbent for removing arsenic, antimony, and fluorine in wastewater, such as figure 1 shown, including the following steps:

[0017] Step 1. Pretreat the macroporous cation exchange resin by conventional acid-base treatment of new resin.

[0018] Specifically, select a macroporous cation exchange resin, treat it with a conventional acid-base treatment method for new resin, and then wash it to neutral with deionized water.

[0019] Step 2, soaking with cerium ammonium nitrate solution.

[0020] Specifically, prepare a cerium ammonium nitrate solution with a concentration of 0.3-0.6mol / L, the volume of the cerium ammonium nitrate solution is 3 times the volume of the pretreated resin, soak the resin with the prepared cerium ammonium nitrate solution 3-6 hours, with the electrostatic adsorption of ion exchange resin to adsorb cerium nitrate ion into the resin, after the time is up, take out t...

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Abstract

The invention discloses a nano adsorbent for removing arsenic, stibium and fluorin in wastewater as well as a preparation method and regeneration method of the nano adsorbent, belonging to the technical field of wastewater treatment. The nano adsorbent is prepared by pretreating macroporous cation exchange resin with a conventional method for acid and alkali treatment on new resin at first, and then sequentially carrying out the following processes of: soaking by using ammonium ceric nitrate and a ferrate solution; performing soaking restoration by using a mixed solution containing ferrite and hydrochloric acid; soaking by using a sodium hydroxide solution, and then performing chemical reaction inside a macroporous resin material to generate nano ferric oxide hydrate and ceric oxide hydrate precipitate particles; and drying and dehydrating for 3 hours at 50 DEG C to obtain an adsorbent loaded with nano ferric oxide hydrate and ceric oxide hydrate. The adsorbent disclosed by the invention can be used for eliminating ions including arsenic, stibium, fluorin and the like in heavy metal wastewater and has good selectivity, and the adsorbent loaded with the nano ferric oxide hydrate and ceric oxide hydrate can be regenerated for use after adsorption saturation.

Description

technical field [0001] The present invention relates to a nano-adsorbent for removing arsenic, antimony and fluorine in wastewater, a preparation method and a regeneration method thereof, which belong to the technical field of wastewater treatment, and are especially suitable for arsenic and antimony in wastewater discharged from nonferrous metal mining and smelting industries , Advanced treatment of fluorine plasma. Background technique [0002] In recent years, heavy metal pollution incidents have occurred frequently, making the non-ferrous metal mining and smelting industries face more stringent wastewater discharge standards. The traditional lime precipitation method and sulfide precipitation method can meet the comprehensive sewage discharge standards after treatment, which is no longer able to meet the new requirements. Adsorption method is a traditional method for advanced treatment of heavy metal wastewater, but currently existing adsorbent materials generally have t...

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28C02F1/58
Inventor 杨晓松邵立南胡建龙郑曦
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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