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Adsorbent for efficiently adsorbing phosphate ions in water and preparation method thereof

A phosphate ion and adsorbent technology, which is applied in the field of adsorbents for efficiently adsorbing phosphate ions in water, can solve the problem of low removal efficiency of phosphate ions, and achieve high dephosphorization efficiency, excellent adsorption capacity, and optimized removal. The effect of efficiency

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 phosphate ions in water in order to overcome the problem of low removal efficiency of phosphate ions in industrial wastewater existing in the prior art

Method used

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  • Adsorbent for efficiently adsorbing phosphate ions in water and preparation method thereof
  • Adsorbent for efficiently adsorbing phosphate ions in water and preparation method thereof
  • Adsorbent for efficiently adsorbing phosphate ions in water and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Dissolve calcium nitrate, magnesium nitrate and ferric nitrate in deionized water in a molar ratio of 5:1:2, 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 add solution B dropwise to solution A, wait for the pH value of the solution to stop at 8.5, continue stirring for 2 hours, pour the solution into the crystallization kettle and heat at 95 °C for 5 hours, filter, wash, and heat at 120 The adsorbent product A was obtained by drying at ℃ for 10 h.

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

Embodiment 2

[0037] Dissolve calcium nitrate, magnesium nitrate and ferric nitrate in deionized water in a molar ratio of 3:3:2, 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 add solution B dropwise to solution A, wait for the pH value of the solution to stop at 8.5, continue stirring for 2 hours, pour the solution into the crystallization kettle and heat at 95 °C for 5 hours, filter, wash, and heat at 120 The adsorbent product B was obtained by drying at ℃ for 10 h.

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

Embodiment 3

[0040]Dissolve calcium nitrate, magnesium nitrate and ferric nitrate in deionized water in a molar ratio of 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 add solution B dropwise to solution A, stop when the pH value of the solution reaches 8.5, continue to stir for 2 hours, pour the solution into the crystallization kettle, hydrothermally treat it at 95 ℃ for 5 hours, filter, wash, and heat at 120 The adsorbent product C was obtained by drying at ℃ for 10 h.

[0041] 20g of adsorbent C was added to 1L aqueous solution containing 500mg of phosphate ions at 20°C, and the content of phosphate ions 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 adsorbing phosphate ions in water and a preparation method thereof. The invention mainly solves the problem of low removal efficiency of phosphate ions in industrial wastewater existing in the prior art. The present invention adopts the method of co-precipitation and hydrothermal treatment to prepare the metal composite Ca x Mg 6‑x Fe 2 (OH) 18 ·4H 2 O or Ca x Mg 6‑x Al 2 (OH) 18 ·4H 2 O, where x=1-5 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 efficiency in removing phosphate ions from water, and can be used in the field of environmental protection.

Description

technical field [0001] The invention relates to an adsorbent for efficiently adsorbing phosphate ions in water and a preparation method thereof. Background technique [0002] Phosphate ion (PO 4 3- ) is a common anion in the inorganic chemical industry, industrial wastewater, mine wastewater, surface water and drinking water, and its large amount has adversely affected chemical production, the environment and human health. Phosphorus is one of the main elements that cause eutrophication in water bodies. In order to effectively control the content of phosphorus in water bodies and prevent eutrophication of water bodies, phosphorus removal treatment must be carried out before the sewage from people's lives and production is discharged into rivers and lakes. Phosphorus removal technology by adsorption is attracting more and more attention because of its high efficiency, rapidity, no secondary pollution, and operation. The selection of adsorbents with low price, readily avail...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/08C02F1/281B01J20/28033C02F2101/105Y02W10/37
Inventor 李旭光邹薇孔德金侯敏
Owner CHINA PETROLEUM & CHEM CORP
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