Condition Optimization for Adsorption of Ammonia Nitrogen in Seawater by Modified Sand Using Response Surface Methodology

化学工业与工程

Chemcial Industry and Engineering

2017, Vol. 34

Issue (3) :65-71 DOI: 10.13353/j.issn.1004.9533.20161104

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Condition Optimization for Adsorption of Ammonia Nitrogen in Seawater by Modified Sand Using Response Surface Methodology

Zhao Jin, Wang Wenhua, Cheng Yu, Jiang Tianxiang, Wang Jing

Institute of Seawater Desalination and Multipurpose Utilization, SOA, Tianjin 300192, China

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Abstract

The adsorption of ammonia nitrogen in polluted seawater by using chitosan coated quartz sand was investigated in this paper. The structure of modified sand had been characterized by SEM and FTIR. Based on the single factor experiment, the effects of factors including pH, dosage and particle size on the removal rate of ammonia nitrogen and interaction were studied using Box-Behnken response surface method. And aquadratic model was established between ammonia nitrogen removal rate and the factors. The results indicate that the order of the factors is as follows: dosage, particle size and pH of solution. The optimal adsorption conditions are pH 7.08, dosage 77.4 g/L, particle size 0.8 mm, the removal rate of ammonia nitrogen is 78.86%, which is consistent with the predicted value by response surface method.

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	Zhao Jin
	Wang Wenhua
	Cheng Yu
	Jiang Tianxiang
	Wang Jing

Keywords： modified sand； ammonia nitrogen； adsorption； response surface method

Received 2016-05-31;

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Zhao Jin, Wang Wenhua, Cheng Yu, Jiang Tianxiang, Wang Jing.Condition Optimization for Adsorption of Ammonia Nitrogen in Seawater by Modified Sand Using Response Surface Methodology[J] Chemcial Industry and Engineering, 2017,V34(3): 65-71

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