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Carbon-based adsorbent for removing phosphate in solution

A carbon-based adsorbent and phosphate technology, applied in the direction of adsorption of water/sewage treatment, application, matrix fertilizer, etc., can solve the problems of secondary pollution, high cost, high product treatment cost, etc., to alleviate water pollution and reduce phosphorus effect of concentration

Pending Publication Date: 2020-09-11
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-priced metal salts commonly used in chemical methods are relatively expensive and easily cause secondary pollution
After chemical phosphorus removal, it is also difficult to separate the treated product from the water body, and the separated product has high treatment cost

Method used

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  • Carbon-based adsorbent for removing phosphate in solution
  • Carbon-based adsorbent for removing phosphate in solution
  • Carbon-based adsorbent for removing phosphate in solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A carbon-based adsorbent for removing phosphate in water, prepared by the following method:

[0033] (1) After mixing the biomass raw material (rice husk) and calcite according to the weight ratio of 1:1, send it into the carbonization furnace for carbonization. The conditions of carbonization treatment are temperature 500 ° C, time 3 hours, and pulverization to 80-150 mesh Calcite-modified biochar was obtained.

[0034] (2) Carry out dilute alkali treatment to the calcite-modified biochar, then wash with deionized water for 3 times, and centrifuge to dry to obtain the primary carbon-based adsorbent; the dilute alkali treatment is to immerse the calcite-modified biochar in dilute lye , heated to 35° C., and stirred at 50 rpm for 2 hours; the composition of the dilute lye is: 5% sodium hydroxide, 15% sodium carbonate, and the balance of water.

[0035](3) Put 1kg of agar, 0.5kg of starch and 1kg of primary carbon-based adsorbent into 40L of deionized water, ultrasonical...

Embodiment 2

[0037] A carbon-based adsorbent for removing phosphate in water, prepared by the following method:

[0038] (1) After mixing the biomass raw material (moso bamboo) and calcite according to the weight ratio of 5:1, send them into the carbonization furnace for carbonization. The conditions for carbonization treatment are 700°C for 2 hours, and pulverize to 80-150 mesh. Calcite modified biochar.

[0039] (2) Carry out dilute alkali treatment to the calcite-modified biochar, then wash with deionized water for 5 times, and centrifuge to dry to obtain the primary carbon-based adsorbent; the dilute alkali treatment is to immerse the calcite-modified biochar in dilute lye , heated to 45° C., and stirred at 80 rpm for 1 hour; the composition of the dilute lye is: 10% sodium hydroxide, 10% sodium carbonate, and the balance of water.

[0040] (3) Put 1kg of agar, 1kg of starch and 3kg of primary carbon-based adsorbent into 60L of deionized water, ultrasonically disperse for 30 minutes, ...

Embodiment 3

[0042] A carbon-based adsorbent for removing phosphate in water, prepared by the following method:

[0043] (1) After mixing the biomass raw material (hickory shell) and calcite according to the weight ratio of 4.2:1, send them into the carbonization furnace for carbonization. The conditions for carbonization treatment are temperature 600 ° C, time 2.5 hours, and pulverization to 80-150 Calcite-modified biochar was obtained.

[0044] (2) Carry out dilute alkali treatment to the calcite-modified biochar, then wash with deionized water 4 times, and centrifuge to dry to obtain the primary carbon-based adsorbent; the dilute alkali treatment is to immerse the calcite-modified biochar in dilute lye , heated to 40° C., and stirred at 60 rpm for 1.5 hours; the composition of the dilute lye is: 8% sodium hydroxide, 12% sodium carbonate, and the balance of water.

[0045] (3) Put 1kg of agar, 0.8kg of starch and 2kg of primary carbon-based adsorbent into 50L of deionized water, ultraso...

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Abstract

The invention discloses a carbon-based adsorbent for removing phosphate in a water body. The carbon-based adsorbent is prepared by the following method of: (1) uniformly mixing a biomass raw materialand a mineral material according to a weight ratio of 1-5:1, feeding the mixture into a carbonization furnace for carbonization, and performing crushing to obtain mineral material modified biochar; (2) carrying out dilute alkali treatment on the mineral material modified biochar; and (3) adding 1kg of agar, 0.5-1kg of starch and 1-3kg of a primary carbon-based adsorbent into 40-60L of deionized water, carrying out ultrasonic dispersion, performing heating to 50-60DEG C, conducting stirring and mixing, and performing natural cooling to obtain a gel. The adsorbent has a good effect of adsorbingand removing excessive phosphate in a water body, can adsorb phosphate in the water body, reduce the phosphorus concentration in the water body and relieve agricultural non-point source pollution, eutrophication and other water body pollution, is easy to separate from the water body, and can be used as a soil conditioner.

Description

technical field [0001] The invention relates to the technical field of water treatment agent production, in particular to a carbon-based adsorbent for removing phosphate in solution. Background technique [0002] Eutrophication refers to the phenomenon of water quality pollution caused by the excessive content of nutrients such as N and P in the water body. The essence is that due to the loss of balance between the input and output of nutrients, the distribution of species in the aquatic ecosystem is unbalanced, and a single species grows wildly, destroying the flow of material and energy in the system, and gradually leading to the extinction of the entire aquatic ecosystem. [0003] Excessive phosphate can lead to eutrophication of water bodies, which has adverse effects on biological health and the environment. Excess phosphorus in water mainly comes from fertilizers, agricultural waste and urban sewage. According to relevant data, the phosphate content of surface water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C05G3/00C05G3/80C05G5/18C05G5/40C02F101/10
CPCB01J20/20B01J20/043B01J20/24C02F1/288C05B17/00C05G3/00C05G3/80C05G5/18C05G5/40C02F2101/105
Inventor 刘玉学汪玉瑛何莉莉吕豪豪钟哲科杨生茂
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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