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Porous composite adsorbing agent for removing stream substrate sludge contamination and preparation process of agent

A composite adsorption and preparation technology, applied in the direction of water/sludge/sewage treatment, sludge treatment, alkali metal compounds, etc., can solve problems such as separation difficulties, achieve low cost, maintain the original ecological situation, and good adsorption effect Effect

Inactive Publication Date: 2013-12-25
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

Powdered activated carbon also has the advantages of fast adsorption speed and low price, but it has the problem of difficult separation in practical application

Method used

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  • Porous composite adsorbing agent for removing stream substrate sludge contamination and preparation process of agent

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Embodiment Construction

[0028] Below in conjunction with example further illustrate the present invention.

[0029] The composite adsorbent is prepared by the impregnation method, and its zero-valent iron-based core carrier is the waste dry cast iron chips produced in the equipment manufacturing plant, with a size of 10-20 mesh and a density of 2.7t / m 3 . The zero-valent iron-based core is combined with the adsorption material through an adhesive material. In order to improve the tightness of the combination between the zero-valent iron-based core and the adhesive material, the zero-valent iron-based core is pre-impregnated with 10% dilute hydrochloric acid for 10 minutes. The adhesive material is chitosan and sodium alginate, and the total mass is 7% of the composite adsorbent. Under acidic conditions, chitosan and sodium alginate are mixed in a ratio of 9:1 and stirred to form a viscous sticky substance. Alloy material with good toughness. After the binding material is impregnated, the mixed powd...

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Abstract

The invention belongs to a stream substrate sludge contamination iron-base composite adsorbing agent in the technical field of restoration of stream substrate sludge. The stream substrate sludge contamination iron-base composite adsorbing agent is composed of a zero-valence iron-base nuclear material, an adhesive material and an adsorbing material, wherein the adhesive material and the adsorbing material respectively contain two components, and the adsorbing material is combined on a zero-valence iron-base nuclear surface through the adhesive material; the adsorbing agent is added into contaminated river substrate sludge and then mechanically stirred and uniformly mixed, a magnetic force recovery device can recover the adsorbing agent after reaction, the later processing is performed, a purpose that the stream substrate sludge is removed is achieved, and the preparation process belongs to a stream substrate sludge in-situ restoration technology. The stream substrate sludge contamination iron-base composite adsorbing agent provided by invention has the advantages that the cost is low, the stream substrate sludge contamination iron-base composite adsorbing agent can be recycled, the specific gravity is large, the adsorbing agent can well sink into a river bottom to adsorb multiple contaminants, and is convenient to use, safe, innocuous and the like.

Description

technical field [0001] The invention belongs to the technical field of river bottom mud restoration, and in particular relates to a porous composite adsorbent for removing river bottom mud pollutants and a preparation process thereof. Background technique [0002] Iron-based materials, including zero-valent iron and iron (hydr) oxides, have good adsorption properties for heavy metals in the environment, and have been widely used in the remediation of environmental pollutants in recent years. Zero-valent iron can remove a variety of toxic and harmful pollutants such as chlorinated organic compounds, nitroaromatic compounds, heavy metals, dyes, and nitrates in water, and is considered to be one of the most promising pollutant treatment technologies. Zero-valent iron can improve the biodegradability of wastewater and reduce the toxicity to microorganisms. It usually removes pollutants through the following actions: (1) direct reduction of zero-valent iron; (2) micro-electrolysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/08B01J20/18B01J20/26B01J20/28B01J20/30C02F11/00
Inventor 丁爱中谢恩豆俊峰程莉蓉郑蕾杨进
Owner BEIJING NORMAL UNIVERSITY
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