摘要
含重金属废水的处理一直是研究的热点和难点问题。为此,选取3种植物纤维固体废弃物(花生壳、巴旦木壳、南瓜子壳),开展不同重金属离子的吸附特征研究。结果表明,3种植物纤维粉末对重金属离子均有很高的吸附效率,且巴旦木壳粉末的吸附性能最优,吸附平衡时间为60 min左右。当重金属离子初始浓度为2 mg/L,pH为5~8时,巴旦木壳粉末对Zn的吸附效率维持在85%以上,对Cu和Cr的吸附效率均可达90%以上。吸附动力学研究表明,3种植物纤维粉末对3种重金属的吸附均符合Freundlich等温吸附方程,以物理吸附机制为主。植物纤维粉末适用于重金属废水的治理有利于实现"以废治废"。
The treatment of wastewater containing heavy metals has always been a hot and difficult problem in the research.Therefore,three kinds of plant fiber solid waste(peanut shell,Padan wood shell and pumpkin seed shell)were selected,and their adsorption characteristics of treating wastewater containing different heavy metal ions were studied.The results showed that the three plant fiber powders had high adsorption efficiency for heavy metal ions,among which the adsorption performance of Padan wood shell powder was the best.When the initial concentration of heavy metal ions was 2 mg/L,p H=5~8,the adsorption efficiency of Padan wood shell powder for zinc was above 85%,and the adsorption efficiency for Cu and Cr were above 90%,and the adsorption rate of Padan wood shell powder was the fastest,and the adsorption equilibrium time was about 60 min.The adsorption kinetics study showed that the adsorption of three kinds of plant fiber powders on the three heavy metal solutions accorded with the Freundlich isotherm adsorption equation,and the adsorption mechanism were still dominated by physical adsorption.It can be seen that the plant fiber powder is suitable for the treatment of waste water containing heavy metals,and the purpose of controlling waste by waste can be achieved.
作者
陶敏
张康夫
廖泽远
王展志
吕继良
李胜方
TAO Min;ZHANG Kangfu;LIAO Zeyuan;WANG Zhanzhi;LYU JUiang;LI Shengfang(School of Environmental Science and Engineering ,Hubei Polytechnic University,Huangshi Hubei 435003;Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation,Hubei Polytechnic University,Huangshi Hubei 435003)
出处
《湖北理工学院学报》
2019年第3期12-16,共5页
Journal of Hubei Polytechnic University
基金
国家自然科学基金面上项目(项目编号:41571321)
湖北省自然科学基金面上项目(项目编号:2018CFB778)
矿区环境污染控制与修复湖北省重点实验室开放基金项目(项目编号:2017107)
湖北理工学院大学生科技创新项目(项目编号:14cx11)
关键词
植物纤维
吸附
重金属离子
吸附动力学
巴旦木壳
plant fiber
adsorption
heavy metal ions
adsorption kinetic
Padan wood shell
