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A kind of adsorbent used in the treatment of sewage containing heavy metals and its preparation method

A sewage treatment and adsorbent technology, which is applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. question

Active Publication Date: 2021-06-08
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, heavy metal ions are different from macromolecular oils in sewage. Their molecules are small, and the concentration of heavy metal ions cannot be effectively reduced only by physical adsorption. For example, activated carbon has good adsorption performance, but for heavy metal ions. Low efficiency and high cost of use

Method used

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  • A kind of adsorbent used in the treatment of sewage containing heavy metals and its preparation method
  • A kind of adsorbent used in the treatment of sewage containing heavy metals and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A modified rice husk powder: the preparation method of the modified rice husk powder comprises the following steps:

[0040] (1) Vacuum-dry the rice husk powder, wash it with deionized water, place it in an aqueous solution of sodium hydroxide with a mass percent concentration of 5wt%, stir and raise the temperature to 80°C, and keep it for 3 hours Naturally lower to room temperature afterwards, stop stirring and wash with water until neutral, filter and dry to obtain pretreated rice husk powder;

[0041] (2) In parts by weight, 28 parts of the pretreated rice husk powder described in step (1) is used as the base, and 3 parts of 4-vinylbenzoic acid and 35 parts of N-tert-butylacrylamide are added as the modified Monomer, add 1 part of crosslinking agent, 2 parts of initiator and 5 parts of dispersant at the same time, graft 4-vinylbenzoic acid and N-tert-butylacrylamide onto the base by suspension polymerization method, thereby preparing The modified rice husk powder i...

Embodiment 2

[0055] Weigh 100 parts of modified rice husk powder prepared in Example 1, 20 parts of polyacrylamide, 35 parts of ethylene-vinyl acetate copolymer, 3 parts of carbon nanotubes, 4 parts of compatibilizer, 2 parts of coupling agent, Foaming agent 5 parts.

[0056] First add other components except the foaming agent into the high-speed mixer and mix for 2 hours, then add the foaming agent and the components after mixing into the internal mixer for 60 minutes;

[0057] The components after banbury mixing are put into a twin-screw extruder to extrude and granulate, and the adsorbent is obtained after drying.

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Abstract

The invention relates to an adsorbent used in the treatment of heavy metal sewage, and specifically provides an adsorbent used in the treatment of heavy metal-containing sewage and a preparation method thereof. Rice husk powder is used as a substrate, and 4-vinylbenzoic acid and After N-tert-butylacrylamide graft modification, the adsorption effect of rice husk powder on heavy metal ions has been greatly improved. substance, carbon nanotubes, compatibilizer, coupling agent and foaming agent, prepared a multi-component adsorbent for heavy metal-containing sewage treatment, which belongs to a foaming porous adsorbent, for Heavy metal ions in sewage have better adsorption performance, and at the same time, its recovery cost is low, the process is simple, and it is easy to operate.

Description

technical field [0001] The invention relates to the field of heavy metal sewage treatment, in particular to an adsorbent used in heavy metal sewage treatment and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, there is a large amount of heavy metal wastewater in modern industry, and the amount of new heavy metal wastewater is huge every day. Usually, industries such as machinery manufacturing, chemical industry, instrumentation, semiconductors, and electronics will discharge wastewater containing heavy metals. Wastewater Heavy metals are mainly copper, zinc, cadmium, nickel, mercury and so on. Even if the concentration of heavy metal ions in water is low, it can still have a great impact on water resources. If animals accidentally introduce heavy metal ions into wastewater, heavy metals will accumulate in the animals and cannot be excreted through metabolism. If corresponding animals, such as fish If, shrimp, crab, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/261C02F1/288C02F2101/20
Inventor 苏彩丽应一梅李海华
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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