生物技术通报 ›› 2019, Vol. 35 ›› Issue (4): 188-194.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0898

• 技术与方法 • 上一篇    下一篇

响应面法优化改性香蕉皮对Pb2+的吸附研究

王玉杰, 王湘君   

  1. 海南热带海洋学院,三亚 572022
  • 收稿日期:2018-10-19 出版日期:2019-04-26 发布日期:2019-05-05
  • 作者简介:王玉杰,女,硕士,讲师,研究方向:环境规划与管理及环境监测;E-mail:13876678196@126.com
  • 基金资助:
    海南省自然科学基金项目(217157),高等学校发展专项资金海洋工程学科建设经费

Optimizing the Adsorption of Pb2+ on Modified Banana Peel Based on Response Surface Methodology

WANG Yu-jie, WANG Xiang-jun   

  1. Hainan Tropical Ocean University,Sanya 572022
  • Received:2018-10-19 Published:2019-04-26 Online:2019-05-05

摘要: 用海南本土天然农林废弃物香蕉皮制备的改性吸附剂,来研究其对废水中重金属铅离子的吸收效果。选用吸附剂用量、吸附时间、Pb2+初始浓度和溶液pH等4个单因素的影响实验,在此基础上对上述4种因素采用Box-Behnken响应面优化设计和实验。结果表明,通过响应面设计分析得到改性香蕉皮吸附剂吸附废水中重金属铅离子的最佳条件为:吸附时间为48 min,吸附剂用量为3 mg/L,Pb2+初始浓度为5.5 mg/L,pH值6,在此条件下Pb2+吸附率达到最大值96.90%,接近于理论值96.97%;吸附时间、Pb2+初始浓度以及吸附时间和Pb2+初始浓度的交互作用对Pb2+吸附率影响极显著(P<0.001),溶液pH对Pb2+吸附率影响显著(P<0.05);二次响应面模型的P值小于0.000 1。该模型的回归方程极显著,可用来分析改性香蕉皮吸附剂对Pb2+的吸附。

关键词: 香蕉皮, Pb2+, 吸附, 响应面法

Abstract: Modified adsorbent prepared by local agricultural and forestry waste banana peel in Hainan was used to study the efficacy of its absorbing heavy metal Pb2+ in wastewater. Based on the effects of single factor such as absorber dosage,adsorption time,the initial concentrations of Pb2+,and pH value on the adsorption rate,Box-Behnken response surface methodology was conducted to optimize the design and experiment. The results showed that the optimized condition of modified banana peel absorbing Pb2+ in wastewater by the response surface analysis was such:adsorption time 48min,absorber dosage 3 mg/L,the initial concentrations of Pb2+ 5.5 mg/L and pH 6,under which the adsorption rate reached 96.90%,and this was consistent with the predicted value 96.97%. Adsorption time,the initial concentrations of Pb2+ and the interaction between adsorption time and initial concentrations of Pb2+ affected extremely significant on the adsorption rate(P<0.001);pH had significant effects on the adsorption rate(P<0.05). The variance analysis of the model revealed that the P value was < 0.000 1.The regression equation of the model was very significant,it could be used to analyze the adsorption of Pb2+ by modified banana peel.

Key words: banana peel, Pb2+, adsorption, response surface methodology