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过程工程学报 ›› 2017, Vol. 17 ›› Issue (4): 716-724.DOI: 10.12034/j.issn.1009-606X.216323

• 反应与分离 • 上一篇    下一篇

MIEX树脂去除水源中突发性六价铬污染的参数优化

靳晓鹏,丁 磊*, 王丹丹, 高 阳   

  1. 安徽工业大学建筑工程学院,安徽 马鞍山 243000
  • 收稿日期:2016-10-14 修回日期:2016-12-21 出版日期:2017-08-20 发布日期:2017-08-16
  • 通讯作者: 丁磊 dinglei1978@163.com
  • 基金资助:
    国家自然科学基金

Parameters Optimizing of Removal of Hexavalent Chromium from the Emergently Polluted Raw Water Using MIEX Resin

Xiaopeng JIN,  Lei DING*,  Dandan WANG,  Yang GAO   

  1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma?anshan, Anhui 243002, China
  • Received:2016-10-14 Revised:2016-12-21 Online:2017-08-20 Published:2017-08-16

摘要: 水源水中加入六价铬模拟水源突发性六价铬污染,采用单因素和响应曲面法建立了二次多项式回归模型,研究了磁性离子交换(MIEX?树脂去除水源突发性六价铬污染的可行性,对工艺参数进行了优化. 结果表明,MIEX树脂可快速去除六价铬,约40 min时达吸附平衡;六价铬去除率随树脂用量增加而增加,随铬浓度增加而降低,pH为4时达最大值,回归模型可有效预测六价铬在MIEX树脂上的吸附. 树脂用量与六价铬初始浓度、树脂用量与溶液pH、六价铬初始浓度与溶液pH间的交互作用对六价铬的去除有显著影响. 最优参数下MIEX树脂对六价铬的去除率为99.99?.

关键词: MIEX树脂, 六价铬, 突发性水源污染, 吸附, 响应曲面

Abstract: Hexavalent chromium was added into raw water to simulate emergent chromium pollution of water source. The reasonable quadratic polynomial model was established and the feasibility of using magnetic ion exchange (MIEX) resin to remove Cr?VI? was investigated by independent variables and response surface tests. The process parameters were also optimized. The results showed that MIEX resin quickly removed Cr?VI?, and the adsorption got equilibrium within 40 min. The removal rate of Cr?VI? increased with increasing of resin dosage and the reducing of Cr(VI) concentration, and reached the maximum at pH 4. The reasonable quadratic polynomial model was established to predict Cr?VI? removal accurately. The interactions of resin dosage and Cr(VI) concentration, resin dosage and pH, Cr(VI) concentration and pH, had significant effects on Cr(VI) removal. The optimal process parameters for Cr?VI? removal onto MIEX resin were obtained, and the maximal removal rate of Cr?VI? was 99.99?.

Key words: MIEX resin, hexavalent chromium, emergent water source pollution, adsorption, response surface