Novel silica gel loaded cross-linked chitosan adsorbent for heavy metal

A technology of heavy metal ions and cross-linked chitosan, applied in the direction of adsorption water/sewage treatment, other chemical processes, chemical instruments and methods, etc., to achieve the effects of rapid sedimentation, high mechanical strength and simple operation

Inactive Publication Date: 2006-07-19
QINGDAO UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Aiming at the problems existing in the existing chitosan-based heavy metal ion adsorbent, the present invention provides a heavy metal ion

Method used

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  • Novel silica gel loaded cross-linked chitosan adsorbent for heavy metal
  • Novel silica gel loaded cross-linked chitosan adsorbent for heavy metal
  • Novel silica gel loaded cross-linked chitosan adsorbent for heavy metal

Examples

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Embodiment Construction

[0034]The present invention is to add refined chitosan 2g in 1mol / L 100mL acetic acid solution, magnetic force stirs 30min, removes insoluble residue after filter cloth filtration; Add inorganic silane reagent γ-glycidoxypropyltrimethoxysilane 2mL in filtrate , after magnetic stirring for 30 minutes, add 50 g of 100-200 mesh silica gel to the solution while stirring, stir evenly, and ultrasonicate for 40 minutes; pour the suspension into a petri dish, stir evenly, and let stand at room temperature for 48 hours until the solid is dry; Soak in 0.01mol / L 100mL sodium hydroxide solution for 30 minutes, take out the adsorbent, wash with distilled water until neutral, and dry at 40°C to obtain the silica gel-loaded cross-linked chitosan heavy metal ion adsorbent.

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Abstract

The invention discloses a new-typed heavy metal ion adsorbent of silica loading crosslinking chitosan in the environment-protection domain, which is characterized by the following: the metal ion adsorbent adapts gamma-epoxy propyl-trimethyl silane with epoxy group and soluble inorganic silane agent as chitosan crosslinking agent; the chitosan crosslinking action is accomplished by the reaction of chitosan and epoxy group and the silane agent hydrolysis and condensation course. The invention displays simple course without organic solvent and environmental pollution, which can dispose the waste water with heavy metal ion.

Description

【Technical field】 [0001] The invention relates to a heavy metal ion adsorbent, in particular to a novel silica gel-loaded cross-linked chitosan heavy metal ion adsorbent. The invention belongs to the field of environmental protection, in particular to the field of waste or waste water treatment containing harmful heavy metal ions. 【Background technique】 [0002] Heavy metals generally exist widely in nature in natural concentrations. However, in recent decades, with the development of modern industry, the mining, smelting, processing and commercial manufacturing activities of heavy metals have been increasing, causing many heavy metals to enter the atmosphere, water and soil environment, causing serious environmental pollution. At present, as one of the important pollution sources in the world, heavy metals such as mercury, lead, copper, and nickel are increasingly harmful to human health, and the treatment of heavy metal pollution has attracted widespread attention. Treat...

Claims

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Application Information

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IPC IPC(8): B01J20/26C02F1/28C02F1/62
Inventor 李峰李雪梅张书圣
Owner QINGDAO UNIV OF SCI & TECH
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