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Preparation method of phosphorus removal adsorbent

A phosphorus adsorbent and modifier technology, applied in chemical instruments and methods, adsorption water/sewage treatment, silicate, etc., can solve problems such as poor phosphate adsorption performance and modifiers that are not environmentally friendly, and achieve expansion Use, strong regeneration ability, strong adsorption effect

Inactive Publication Date: 2019-05-24
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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Problems solved by technology

[0011] In view of the above-mentioned deficiencies and defects of the prior art, the purpose of the present invention is to provide a method for preparing a phosphorus removal adsorbent, which solves the technical problems of poor phosphate adsorption performance of zeolite and non-environmental modifiers in the prior art.

Method used

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  • Preparation method of phosphorus removal adsorbent
  • Preparation method of phosphorus removal adsorbent
  • Preparation method of phosphorus removal adsorbent

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Embodiment

[0048] The aluminum sludge obtained from the urban water supply plant was stored in a refrigerator (4°C) for later use.

[0049] Aluminum sludge is a by-product produced after coagulation and precipitation of aluminum salt or aluminum polymer as the main coagulant in urban water supply plants. After centrifugal dehydration, the TS is 15.36g·L -1 ~16.84g·L -1 , the aluminum content in the aluminum sludge accounts for about 16.38% of its dry weight.

[0050] At 25°C, add concentrated sulfuric acid to the aluminum sludge, adjust the pH of the aluminum sludge to 1.5, put it into a constant temperature shaking incubator, set the stirring speed at 150rpm, and mix for 15-90min;

[0051] At 25°C, add concentrated sulfuric acid to the aluminum sludge, adjust the pH of the aluminum sludge to 1.5, put it into a constant temperature shaking incubator, and stir at a stirring speed of 90, 120, 150, 180, and 200 rpm for 60 minutes;

[0052] At 25°C, add concentrated sulfuric acid to the al...

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Abstract

The invention provides a preparation method of a phosphorus removal adsorbent, which comprises the following steps of: taking aluminum sludge as a raw material, firstly recovering an aluminum-containing intermediate product by an acidification method, preparing a modifier by a hydrothermal co-precipitation method to carry out matrix modification on the zeolite, and finally obtaining the phosphorusremoval adsorbent modified by matrix; the aluminum sludge is a by-product generated by using aluminum salt or aluminum polymer as a main coagulant for coagulation precipitation in an urban water supply plant, the solid content TS after centrifugal dehydration is 15.36g L-1-16.84g L-1, and the aluminum content in the aluminum sludge accounts for about 16.38% of the dry weight of the aluminum sludge. Compared with the modified zeolite in which a chemical agent is an aluminum source, the phosphorus removal adsorbent prepared by taking the aluminum sludge as the aluminum source not only has goodadsorption effect on phosphate and strong adsorption capacity, but also has good desorption effect and strong regeneration capacity.

Description

technical field [0001] The invention belongs to the field of sewage treatment and adsorbent preparation, and in particular relates to a preparation method of an adsorbent for phosphorus removal. Background technique [0002] Water eutrophication has become one of the most serious water environmental problems facing the world today. Phosphorus is a key nutrient element that causes water eutrophication. Therefore, the removal of phosphorus in wastewater is very important for the prevention and control of water eutrophication. Necessary, the methods for removing phosphorus in wastewater mainly include biological methods, chemical precipitation methods, crystallization methods, membrane separation methods and adsorption methods, etc. Among them, adsorption method is a method that can effectively remove phosphorus in wastewater. [0003] At present, the phosphorus removal technologies of large-scale sewage treatment plants mainly include biological phosphorus removal, chemical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F101/10
Inventor 韩芸苏林东赵胜美胡玉洁李天星连洁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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