Water body deep phosphorous removal adsorbent and preparation method thereof

Abstract

The invention discloses a water body deep phosphorous removal adsorbent and a preparation method thereof. The water body deep phosphorous removal adsorbent comprises the following raw materials in parts by weight: 10 to 60 parts of attapulgite, 10 to 60 parts of bentonite, 2 to 8 parts of aluminum salt, 2 to 6 parts of calcium salt, 10 to 30 parts of ferric salt, and 2 to 8 parts of adsorption assistant, and is prepared through steps of roasting pretreatment, crushing and mixing. A compounded material is simple in preparation technology, high in phosphorous removal efficiency, ensures that phosphorous removal efficiency can reach 99 percent or above in a water sample with the phosphorus concentration being 2mg / L, the phosphorous concentration can be reduced to be smaller than 0.050mg / L after treatment and meets the requirement of standards of Class II water body in a national surface water environment quality standard GB3838-2002.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to an adsorbent for deep dephosphorization of water bodies and a preparation method thereof. Background technique [0002] With the continuous development of industry, agriculture and living standards, the production and use of a large number of phosphorus-containing fertilizers and pesticides, and the excessive discharge of phosphorus-containing domestic sewage, have increased the phosphorus content in seawater and lake water. The excessively high phosphorus content in the water body will destroy the water ecosystem and affect human life and health. [0003] In order to solve the environmental problems caused by the excessively high phosphorus content in water bodies, many technologies such as membrane filtration, chemical precipitation, and adsorption methods have been applied to the capture of phosphorus in water bodies. In the actual governance process, multiple tec...

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Problems solved by technology

[0004] However, for the adsorbents currently aimed at the deep removal of phosphorus in water bodies, the phosphorus concentration before and after water treatment has a small change (2mg / L-0.8mg / L is reduced to 0.2mg / L or below 0.05mg / L), resulting in the removal of many high-capacity sorbents. The actual utilization rate of phosphorus adsorbent is low, resulting in huge waste of materials, resulting in high cost of adsorbent in the process of deep water phosphorus removal treatment, and the application is also limited