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Adsorbent for efficiently removing arsenite ion in water and preparation method thereof

A technology of arsenite and adsorbent, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problem of low removal efficiency of arsenite ions, and achieve fast adsorption speed and excellent adsorption Ability, high efficiency effect

Active Publication Date: 2022-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is to provide a new adsorbent for adsorbing arsenite ions in water in order to overcome the problem of low removal efficiency of arsenite ions in industrial wastewater solutions in the prior art

Method used

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  • Adsorbent for efficiently removing arsenite ion in water and preparation method thereof
  • Adsorbent for efficiently removing arsenite ion in water and preparation method thereof
  • Adsorbent for efficiently removing arsenite ion in water and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Dissolve copper nitrate, manganese nitrate and ferric nitrate in deionized water in a molar ratio of 4.5:1.5:2, stir at room temperature until clear, record as solution A; dissolve sodium hydroxide in deionized water, stir at room temperature until clear , denoted as solution B; quickly drop solution B into solution A, when the pH value of the solution stops at 8.0, continue stirring for 2 hours, pour the solution into the crystallization kettle, and perform hydrothermal treatment at 105 ℃ for 5 hours, filter, wash, and heat at 100 The adsorbent product A was obtained by drying at ℃ for 10 h.

[0035] 12g of adsorbent A was added to 1L aqueous solution containing 500mg of arsenite ions at 20°C, and the content of arsenite ions in the water was detected after stirring for 20min. The results are listed in Table 1.

Embodiment 2

[0037] Dissolve copper nitrate, manganese nitrate and ferric nitrate in deionized water in a molar ratio of 3:3:2, stir at room temperature until clear, and record as solution A; dissolve sodium hydroxide in deionized water, stir at room temperature until clear , denoted as solution B; quickly drop solution B into solution A, when the pH value of the solution stops at 8.0, continue stirring for 2 hours, pour the solution into the crystallization kettle, and perform hydrothermal treatment at 105 ℃ for 5 hours, filter, wash, and heat at 100 The adsorbent product B was obtained by drying at ℃ for 10 h.

[0038] 12g of adsorbent B was added to 1L aqueous solution containing 500mg of arsenite ion at 20°C, and the content of arsenite ion in the water was detected after stirring for 20min. The results are listed in Table 1.

Embodiment 3

[0040] Dissolve copper nitrate, manganese nitrate and lanthanum nitrate in deionized water in a molar ratio of 4.5:1.5:2, stir at room temperature until clear, and record as solution A; dissolve sodium hydroxide in deionized water, stir at room temperature until clear , denoted as solution B; quickly drop solution B into solution A, when the pH value of the solution stops at 8.0, continue stirring for 2 hours, pour the solution into the crystallization kettle, and perform hydrothermal treatment at 105 ℃ for 5 hours, filter, wash, and heat at 100 The adsorbent product C was obtained by drying at ℃ for 10 h.

[0041]12g of adsorbent C was added to 1L aqueous solution containing 500mg of arsenite ion at 20°C, and the content of arsenite ion in the water was detected after stirring for 20min. The results are listed in Table 1.

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Abstract

The invention relates to an adsorbent for efficiently removing arsenite ions in water and a preparation method thereof, and relates to an adsorbent for efficiently adsorbing arsenite ions in water and a preparation method thereof. It mainly solves the problem of low removal efficiency of arsenite ions in wastewater solution existing in the prior art. The present invention adopts the method of co-precipitation and hydrothermal treatment to prepare the metal composite Cu x Mn 6‑x La 2 (OH) 18 .4H 2 O or Cu x Mn 6‑x Fe 2 (OH) 18 .4H 2 O, where x=2-5 is the technical solution of the adsorbent, which better solves this problem. The adsorbent prepared by the method of the invention has the characteristics of high removal efficiency of arsenite ions in water, and can be used in the field of environmental protection.

Description

technical field [0001] The invention relates to an adsorbent for efficiently removing arsenite ions in water and a preparation method thereof. Background technique [0002] The harm of arsenic to the environment has attracted people's attention, and the pollution of arsenic mainly comes from the weathering of arsenic-bearing geological bodies. Arsenic pollution is widespread in nature. The harm of arsenic pollution to human body is mainly carcinogenic and teratogenic effects, among which trivalent arsenic is the most toxic. At present, chemical adsorption, neutralization precipitation, flocculation precipitation and reverse osmosis are mainly used at home and abroad to control arsenic pollution. These methods have their own advantages and disadvantages. Generally speaking, the adsorption-precipitation method is easy to operate and has a low cost, but it still needs to be improved in terms of treatment effect and waste disposal; while the reverse osmosis method requires lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/10
CPCB01J20/0207B01J20/06C02F1/281C02F2101/103
Inventor 李旭光邹薇孔德金侯敏
Owner CHINA PETROLEUM & CHEM CORP
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