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Absorbent used in sewage phosphorus removal, and preparation method thereof

A phosphorus adsorbent and adsorbent technology, applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve problems such as the popularization and use of unfavorable phosphorus-absorbing agents, the high cost of molecular sieve preparation, and the complicated operation steps. , to achieve strong market competitiveness and promotion value, good phosphorus absorption effect, and high phosphorus removal rate.

Inactive Publication Date: 2015-04-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li Bin et al. (Journal of Kunming University of Science and Technology (Science and Technology Edition), 2005, 30 (4): 88-91) prepared a kind of rare earth phosphorus absorbing agent with molecular sieve as carrier loading lanthanum oxide, and used for deep phosphorus removal of wastewater, although its The adsorption capacity of phosphorus can reach 19.24mg / g, and the adsorption performance of the prepared adsorbent can still maintain 85% of the original adsorption capacity after repeated desorption and roasting regeneration. However, the preparation cost of molecular sieve is high, so it needs to be regenerated repeatedly to reduce the cost of use, and the operation steps of this regeneration treatment are not only cumbersome, but the cycle is long, and the regeneration agent is consumed, resulting in energy consumption, which is not conducive to phosphorus absorption. Promote the use of agents

Method used

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  • Absorbent used in sewage phosphorus removal, and preparation method thereof
  • Absorbent used in sewage phosphorus removal, and preparation method thereof
  • Absorbent used in sewage phosphorus removal, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dry industrial lithium-silicon powder waste slag after 150 mesh sieving; then prepare La 3+ A solution with an ion concentration of 0.12mol / L, and then add the dried industrial lithium silicon powder waste residue to the prepared La 3+ ionic solution, and use 1M NaOH dilute lye to adjust the pH of the mixed solution to 9, and then stand at room temperature for 8 hours for impregnation reaction after fully stirring; perform solid-liquid separation of the lithium silicon powder-lanthanum mixture after the impregnation reaction, and collect solid powder, and the obtained solid powder is repeatedly washed to neutrality, and then dried.

Embodiment 2

[0033] After passing through 200 mesh sieves, the industrial lithium silicon powder waste residue is dried for later use; then the lanthanum nitrate is prepared into La 3+ A solution with an ion concentration of 0.10mol / L, and then add the dried industrial lithium silicon powder waste residue to the prepared La 3+ ionic solution, and use 1M NaOH dilute lye to adjust the pH of the mixed solution to 8, and then stand at room temperature for 7 hours of impregnation reaction after being fully stirred; perform solid-liquid separation of the lithium silicon powder-lanthanum mixture after the impregnation reaction, and collect solid powder, and the obtained solid powder is repeatedly washed to neutrality, and then dried.

Embodiment 3

[0035] After passing through 250 mesh sieves, the industrial lithium silicon powder waste residue is dried for later use; then the lanthanum sulfate is prepared into La 3+A solution with an ion concentration of 0.04mol / L, and then add the dried industrial lithium silicon powder waste residue to the prepared La 3+ ionic solution, and use 1M NaOH dilute lye to adjust the pH of the mixed solution to 11, after fully stirring, stand at room temperature for 10 hours of impregnation reaction; perform solid-liquid separation of the lithium silicon powder-lanthanum mixture after the impregnation reaction, and collect solid powder, and the obtained solid powder is repeatedly washed to neutrality, and then dried.

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Abstract

The invention discloses an absorbent used in sewage phosphorus removal. A carrier of the absorbent is industrial lithium-silicon powder waste slag with a size no lower than 150 meshes. Lanthanum ions are loaded on the carrier. With the absorbent, the removal rate upon phosphorus in phosphorus-containing sewage and wastewater or natural water body with a total phosphorus concentration of 1mg / L and a pH value of 3-8 is always higher than 86%. The invention also discloses a preparation method of the absorbent. According to the invention, the carrier raw material lithium-silicon powder adopted by the absorbent is selected from industrial waste slag, such that the source is wide, and cost is low. With a developed pore structure, the carrier can provide sufficient active absorption points. Only trace of rare earth lanthanum used for modification is needed to be added. The obtained absorbent has excellent phosphorus absorption effects in natural water bodies, sewage and wastewater. With the absorbent, an absorption capacity is high, absorbent stability in water body is high, no water body secondary pollution is caused, and cost is low. The absorbent has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of adsorbent used in sewage treatment and its preparation, and in particular relates to an adsorbent used for phosphorus removal in sewage and a preparation method thereof. Background technique [0002] With the development of industry and the intensification of human activities, the water body environment has changed significantly, especially the eutrophication of water body. Eutrophication is mainly caused by the excessive content of nutrients such as nitrogen and phosphorus in water. Among them, phosphorus is the limiting factor for the growth of algae and other phytoplankton in natural water bodies, and it is also the decisive factor leading to eutrophication of water bodies. According to the second survey of the current status of lakes in my country, there are 138 existing lakes with an area greater than 10km 2 Among the lakes, 40.1% reached the severe eutrophication standard, and 85.4% exceeded the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28C02F1/58
CPCB01J20/0296B01J20/0207B01J20/0288B01J20/04B01J20/08B01J20/103B01J2220/42B01J2220/4806B01J2220/4887C02F1/281C02F2101/105
Inventor 陈尧杨志山蒋文举陈婷张进郑体刚
Owner SICHUAN UNIV
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