摘要
以虾蟹壳为原料,采用酸化一步法制备出具有强吸附能力的虾蟹壳生物吸附剂,通过模拟试验研究了该吸附剂对废水中刚果红的去除特性,分析了吸附剂用量、吸附时间、pH值、吸附温度、刚果红初始浓度对吸附效果的影响。结果表明,最佳的吸附条件为吸附剂用量0.1 g、pH=7、吸附温度65℃、吸附时间2 h,最佳条件下的刚果红去除率达到92.96%。吸附剂对刚果红的吸附过程与拟二级动力学模型相符,吸附反应涵盖了外部液膜扩散、表面吸附和颗粒内扩散,其吸附速率与驱动力的平方成正比。
Shrimp and crab shell biosorbent,synthesized by acidification biological shrimp shells,has strong adsorption capacity.The removal of Congo red from wastewater by this biosorbent was studied through simulation experiment.The influences of important factors such as adsorbent dosage,adsorption time,adsorption temperature,pH value and initial concentration of Congo red on adsorption were systematically examined through static experiment.The results shows that the optimal conditions of adsorption are that the adsorption dosage is 0.1 g,the pH is 7,the adsorption temperature is 338 K and the adsorption time is 2 hours.The removal rate of Congo red reaches 92.96%with such optimal conditions.The adsorption process of Congo red onto the biosorbent is consistent with the pseudo two order kinetics model.The adsorption reaction includes the diffusion of liquid film,surface adsorption and intraparticle diffusion.The adsorption rate is proportional to the square of the driving force.
作者
刘兴强
刘辉峡
徐琳雅
LIU Xing-qiang;LIU hui-xia;XU Lin-ya(Department of Environmental Science and Engineering,Tan KahKee College Xiamen University,Zhangzhou 363105,China;Key Laboratory of Estuarine Ecological Security and Environmental Health,Fujian Province University,Zhangzhou 363105,China)
出处
《能源环境保护》
2019年第2期5-9,共5页
Energy Environmental Protection
基金
福建省高等学校新世纪优秀人才支持计划
福建省自然科学基金面上项目(2015J01062)
福建省教育厅科技研究A类科技项目(JA13354)
关键词
虾蟹壳
吸附
刚果红
去除率
Shrimp and crab shell
Adsorption
Congo red
Removal rate
