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Method for preparing activated sludge cuprous oxide composite material by using kandelia candel hypocotyl extract

A technology of activated sludge and cuprous oxide, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc. The effect of short processes, high environmental benefits and economic value

Inactive Publication Date: 2019-03-19
MINNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a preparation method for synthesizing activated sludge cuprous oxide composite material from candela hypocotyl extract, which solves the problem that the existing liquid phase reduction method easily causes secondary pollution, and the preparation cost is relatively high. high problem

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  • Method for preparing activated sludge cuprous oxide composite material by using kandelia candel hypocotyl extract
  • Method for preparing activated sludge cuprous oxide composite material by using kandelia candel hypocotyl extract

Examples

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Effect test

Embodiment 1

[0031] Using activated sludge as a carrier, the activated sludge cuprous oxide composite material is synthesized and prepared by using polyphenols, flavonoids, caffeine and other biologically active reducing agents contained in the candela hypocotyl extract. The specific implementation steps are:

[0032] The activated sludge from Zhangzhou domestic sewage treatment plant was dried in an oven at 105°C for 20 hours, then crushed and passed through a 60-mesh sieve. The sieved activated sludge is soaked in 2mL of 0.1mol / L nitric acid solution per gram for 20h, filtered with suction and quickly washed with distilled water until neutral, dried in an oven at 105°C for 18h, and stored for later use.

[0033] Dissolve an appropriate amount of copper chloride dihydrate and sodium hydroxide in a certain amount of deionized water to obtain 0.2 and 0.8 mol / L mixed solutions of copper chloride and sodium hydroxide. Add 15mL mixed solution per gram of 60-mesh activated sludge, stir magnetic...

Embodiment 2

[0037] The activated sludge from the Zhangzhou domestic sewage treatment plant was dried in an oven at 105°C for 22 hours, then crushed and passed through an 80-mesh sieve. The sieved activated sludge is soaked in 2 mL of 0.2 mol / L nitric acid solution per gram for 22 hours, filtered by suction and quickly washed with distilled water until neutral, dried in an oven at 110°C for 20 hours, and stored for later use.

[0038] Dissolve an appropriate amount of copper chloride dihydrate and sodium hydroxide in a certain amount of deionized water to obtain 0.3 and 1.0 mol / L mixed solutions of copper chloride and sodium hydroxide. Add 20mL mixed solution per gram of 80-mesh activated sludge, stir magnetically for 8 hours, filter and wash quickly with deionized water until no copper ions are detected in the filtrate, and dry in an oven at 110°C for 20 hours to obtain copper-loaded activated sludge. .

[0039] The collected candela hypocotyls were removed from impurities, cleaned with ...

Embodiment 3

[0042] The activated sludge from the Zhangzhou domestic sewage treatment plant was dried in an oven at 105°C for 24 hours, then crushed and passed through a 100-mesh sieve. The sieved activated sludge is soaked in 3 mL of 0.2 mol / L nitric acid solution per gram for 24 hours, filtered by suction and quickly washed with distilled water until neutral, dried in an oven at 105°C for 20 hours, and stored for later use.

[0043] Dissolve an appropriate amount of copper chloride dihydrate and sodium hydroxide in a certain amount of deionized water to obtain 0.4 and 1.0 mol / L copper chloride and sodium hydroxide solutions. Add 30mL mixed solution per gram of 100-mesh activated sludge, stir magnetically for 7 hours, filter with suction and wash quickly with deionized water until no copper ions are detected in the filtrate, and dry in an oven at 105°C for 19 hours to obtain copper-loaded activated sludge. .

[0044] The collected candela hypocotyls were removed from impurities, cleaned ...

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Abstract

The invention discloses a method for preparing an activated sludge cuprous oxide composite material by using kandelia candel hypocotyl extract. The method comprises the steps of by taking activated sludge as a carrier, drying the activated sludge of municipal sewage treatment plants, crushing, screening, soaking by using nitric acid, carrying out suction filtration and drying for later use; and reducing copper ions to nano-cuprous oxide by adopting bioactive reducing agents such as polysaccharide, amino acid, vitamin C and the like contained in the kandelia candel hypocotyl extract. The methodhas the beneficial effects that the adsorption performance of the activated sludge and the high catalytic activity of cuprous oxide are organically combined by the activated sludge cuprous oxide composite material, so that the adsorption and reduction properties of the composite material applied to printing and dyeing wastewater treatment are improved; chemical reducing agents such as sodium borohydride and the like are not needed, so that the harm to the environment is less and the production cost is low; the shortcomings that the current cuprous oxide recovery is difficult, the secondary pollution is easy to form and the like are overcome by means of the prepared activated sludge cuprous oxide composite material; and therefore, the method has high environmental benefit and economic value.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a preparation method for synthesizing activated sludge cuprous oxide composite material from candela hypocotyl extract. Background technique [0002] Activated sludge from urban domestic sewage treatment plants is solid, semi-solid and liquid waste generated during sewage purification and treatment. Activated sludge contains about 95% organic components, which are rich in carboxyl, amino, hydroxyl, mercapto and phosphoryl groups with adsorption properties, and can be used to make adsorbents to treat sewage for resource utilization. Patent (application number: CN201610341724.1) "A preparation method of acetic acid activated sludge-based adsorbent", patent (application number: CN201610172120.9) "preparation of polyaniline modified sludge adsorbent and removal of hexavalent chromium in water The method" and the patent (application number: CN201611195821.0) "Preparation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/13C02F1/28C02F1/58B01J20/22B01J23/72
CPCB01J20/22B01J23/72C02F1/28C02F11/00C02F11/12
Inventor 黄明强冯状状徐俊杨瑜蔡顺有朱敏聪
Owner MINNAN NORMAL UNIV
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