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Study on Adsorption Treatment of Phosphorus with Modified Bentonite

Deng Shu-ping

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Abstract

Bentonite is modified by macromolecular flocculant PDMDAAC,cationic ammonium salt and sulphuric acid.The treatment capacity to phosphorus with modified bentonite is investigated under different conditions.At the same time,the treatment effects of the original bentonite,acid modified bentonite and modified bentonite on the phosphorus removal were compared.The results show that the removal rate of phosphorus can be over 98% with the dosage of modified bentonite being 6g/L,pH value 4～10,the adsorption time of 40 min and reaction temperature at 20℃.This technology has such advantages as good treatment effect,easy operation and low cost.

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What this paper is about

Bentonite is modified by macromolecular flocculant PDMDAAC,cationic ammonium salt and sulphuric acid.The treatment capacity to phosphorus with modified bentonite is investigated under different conditions.At the same time,the treatment effects of the original bentonite,acid modified bentonite and modified bentonite on the phosphorus removal were compared.The results show that the removal rate of phosphorus can be over 98% with the dosage of modified bentonite being 6g/L,pH value 4～10,the adsorption time of 40 min and reaction temperature at 20℃.This technology has such advantages as good treatment effect,easy operation and low cost.

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Available abstract

Bentonite is modified by macromolecular flocculant PDMDAAC,cationic ammonium salt and sulphuric acid.The treatment capacity to phosphorus with modified bentonite is investigated under different conditions.At the same time,the treatment effects of the original bentonite,acid modified bentonite and modified bentonite on the phosphorus removal were compared.The results show that the removal rate of phosphorus can be over 98% with the dosage of modified bentonite being 6g/L,pH value 4～10,the adsorption time of 40 min and reaction temperature at 20℃.This technology has such advantages as good treatment effect,easy operation and low cost.

Key concepts: Bentonite, Flocculation, Adsorption, Phosphorus, Cationic polymerization, Ammonium, Chemistry, Salt (chemistry)

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