响应面法优化改性砂吸附海水中氨氮的条件  

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

作　　者：赵瑾[1] 王文华[1] 成玉[1] 姜天翔[1] 王静[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《化学工业与工程》2017年第3期65-71,共7页Chemical Industry and Engineering

基　　金：海洋公益性行业科研专项项目(201405035);中央级公益性科研院所基本科研业务费专项资金项目(K-JBYWF-2015-G20)

摘　　要：采用石英砂负载壳聚糖吸附去除污染海水中的氨氮,并进行SEM、FTIR表征分析。在单因素实验的基础上,采用Box-Behnken响应面法考察pH值、改性砂投加量、改性砂粒径3个因素对氨氮去除率的影响及交互作用,并建立改性砂吸附氨氮的多元二次响应面回归模型。结果表明:各因素对氨氮去除率的影响主次顺序为:改性砂投加量>溶液pH值>改性砂粒径,最适宜吸附条件为:pH=7.08,投加量77.4 g/L,粒径0.8 mm,此条件下氨氮的去除率为78.86%,与预测值相符。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 meth- od. 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.

关 键 词：改性砂 氨氮 吸附 响应面法 

分 类 号：X55[环境科学与工程—环境工程]