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A preparation method of biochar composite adsorption material for removing molybdate from surface water

A composite adsorption material and water molybdate technology, applied in water pollutants, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as secondary pollution, high operating costs, and difficult operations, and achieve economical savings Cost, low cost, wide-ranging effects

Active Publication Date: 2018-09-11
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high operating cost, difficult operation and easy secondary pollution in the existing technology for removing molybdate from water body, the present invention provides a preparation method of biochar composite adsorption material for removing molybdate from water body, In order to achieve the purpose of simple preparation process and low operating cost, improve the adsorption capacity of molybdate, and also provide an effective way for waste resource utilization

Method used

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  • A preparation method of biochar composite adsorption material for removing molybdate from surface water
  • A preparation method of biochar composite adsorption material for removing molybdate from surface water
  • A preparation method of biochar composite adsorption material for removing molybdate from surface water

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Embodiment 1

[0040] The pomelo peel was washed, air-dried and cut, then heated and pyrolyzed in an anoxic environment in a muffle furnace, the pyrolysis temperature was 250°C, and the pyrolysis time was 30 minutes. The pyrolyzed material was cooled and then added to 0.2mol / L FeSO 4 solution, shaken for 30 minutes. Filter and collect carbonized biomass solids, add the cleaned carbonized biomass solids to 0.2mol / L Na 2 S 2 o 3 solution, shaken for 30 minutes. After the solid was collected by filtration, it was added to a CTMAB solution containing 0.03 mol / L, shaken for 30 minutes, filtered and washed with deionized water until neutral, and baked at 80° C. for 6 hours, which was the biochar composite adsorption material 1.

Embodiment 2

[0042] The orange peels were washed, air-dried and cut, then heated and pyrolyzed in a muffle furnace in an oxygen-deficient environment with a pyrolysis temperature of 250°C and a pyrolysis time of 30 minutes. The pyrolyzed material was cooled and then added to 0.2mol / L FeSO 4 solution, shaken for 30 minutes. Filter and collect carbonized biomass solids, add the cleaned carbonized biomass solids to 0.2mol / L Na 2 S 2 o 3 solution, shaken for 30 minutes. After the solid was collected by filtration, it was added to a 0.03 mol / L CTMAB solution, shaken for 30 minutes, filtered and washed with deionized water until neutral, and baked at 100° C. for 4 hours to obtain the biochar composite adsorption material 2.

Embodiment 3

[0044] After washing and air-drying the grapefruit peels and orange peels, heat and pyrolyze them in an oxygen-free environment in a muffle furnace. The pyrolysis temperature is 350° C. and the pyrolysis time is 30 minutes. After the pyrolysis material is cooled, the grapefruit peel and orange peel are mixed according to the mass ratio of 9:1, and then added to 0.2mol / L FeSO 4 solution, shaken for 30 minutes. Filter and collect carbonized biomass solids, add the cleaned carbonized biomass solids to 0.2mol / L Na 2 S 2 o 3 solution, shaken for 30 minutes. After the solid was collected by filtration, it was added to a CTMAB solution containing 0.03 mol / L, shaken for 30 minutes, filtered and washed with deionized water until neutral, and baked at 100° C. for 4 hours to obtain the biochar composite adsorption material 3 .

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Abstract

The invention discloses a preparation method of a bio-char composite adsorption material for removing surface water body molybdate, and belongs to the field of bio-char composite adsorption materials. The preparation method comprises the following specific steps: (1) cleaning grapefruit peel and orange peel, drying in the air, and cutting; (2) heating the particle solid for pyrolysis, cooling and smashing to obtain charred grapefruit peel and charred orange peel; (3) modifying the pyrolyzed substance, and performing ferrous sulfate modification, sodium thiosulfate modification and hexadecyl trimethyl ammonium bromide modification respectively; (4) cleaning with deionized water, and drying to obtain the bio-char composite adsorption material. After surface sewage in which the concentration of the molybdate is 5mg / L is treated through the adsorption material, the molybdate content of a water body reaches an underground water quality standard (GB / T 14848-9) and type IV (less than or equal to 0.5mg / L). The preparation method has characteristics of low cost, high adsorption efficiency, wide application and the like, resource utilization of waste is realized, and meanwhile good social and economical benefits are achieved.

Description

technical field [0001] The invention belongs to the field of biochar adsorption materials, and in particular relates to the preparation of molybdate sewage treatment adsorption materials, in particular to a biochar composite adsorption material and a preparation method thereof. Background technique [0002] Molybdenum is one of the trace elements necessary for the survival of animals and plants, and it is also an important strategic resource in the development of the national economy. The chemical form of heavy metal molybdenum is variable, and it usually exists in two oxide forms in nature, one is tetravalent molybdenum, and the other is hexavalent molybdenum. In acidic environments, molybdates are easily concentrated and immobilized, while in alkaline and oxidizing environments, molybdates are re-released into the environment. Due to relatively backward molybdenum mining technology and insufficient management of alkaline molybdenum tailings, molybdenum pollution in water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/20B01J20/28C02F1/28C02F101/20
CPCB01J20/20B01J20/28011B01J2220/4825C02F1/283C02F2101/20C02F2103/007
Inventor 练建军陈波陈光孟冠华刘宝河王诗生王育来
Owner ANHUI UNIVERSITY OF TECHNOLOGY