Preparation method of agricultural and forestry waste adsorbing material for treatment of printing and dyeing wastewater

Abstract

The invention discloses a preparation method of an agricultural and forestry waste adsorbing material for treatment of printing and dyeing wastewater. The preparation method comprises the following steps: S1, premixing short-chain acid and long-chain acid, and carrying out a pre-reaction at a certain temperature for a certain period of time to obtain high-activity mixed acid; S2, uniformly blending bagasse, straw, straw fiber waste and the mixed acid, adjusting the moisture content of the formed mixture to a certain moisture content, putting the mixture into microwave equipment, and carrying out a reaction for a certain period of time at a certain power to obtain a mixed acid cellulose ester crude product; S3, carrying out washing, suction filtration and drying to obtain a mixed acid cellulose ester product; and S4, with sodium alginate as a forming agent, subjecting sodium alginate and the obtained mixed acid cellulose ester to heating and blending, and carrying out cooling, crosslinking and curing molding to obtain a spherical adsorbent. According to the method, the bagasse, straw and rice straw are used as raw materials to prepare composite cellulose ester through the compositeesterification effect of short-chain acid and long-chain acid, and the composite cellulose ester is compounded with sodium alginate to prepare the adsorbing material which can effectively treat printing and dyeing wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for preparing an agricultural and forestry waste adsorption material for printing and dyeing wastewater treatment. Background technique [0002] At present, with the progress of human beings and the rapid development of society, industrial and agricultural production is developing rapidly, and at the same time, a large amount of pollutants are discharged into the environment, which aggravates the problem of water pollution and puts heavy pressure on environmental protection. Generally speaking, industrial wastewater can be produced according to its The components are divided into four categories: organic, inorganic, mixed and radioactive wastewater. Among them, the pollution of colored dye wastewater brought about by the vigorous development of the textile industry is becoming more and more serious, which has extremely adverse effects on the environment. According...

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Problems solved by technology

[0004] The present invention provides a method for preparing an agricultural and forestry waste adsorption material for printing and dyeing wastewater treatment, which can effectively solve the problem that the basic raw materials for synthetic dyes proposed in the above background technology are anthraquinone, benzene, naphthalene, aniline and benzidine compounds, wherein Some dyes contain toxic chemical substances such as p-diamine biphenyls, which may induce organic mutations and cause cancer, and organic dye wastewater discharged into water bodies will also have a greater impact on soil and water bodies, and the toxic components are more toxic. It can enter the organism with the cycle of nature, and eventually destroy human health and the homeland on which to live. Therefore, the removal of dyes in wastewater has become one of the environmental pollution problems to be solved urgently in all countries in the world.

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