牡蛎壳改性材料及其吸附多氯联苯的性能

发布时间：2018-04-11 03:01

  本文选题：牡蛎壳 + 改性材料　； 参考：《化工进展》2017年05期

【摘要】：以硫酸亚铁为铁源,通过硼氢化钾原位还原-负载制得纳米铁改性牡蛎壳材料,并对其微观结构进行表征,探讨改性后的牡蛎壳材料对持久性有机物多氯联苯(PCBs)的吸附性能。实验结果表明:改性牡蛎壳材料中纳米铁颗粒粒径均匀且分散度较高,改性后的牡蛎壳材料具有很好的PCBs废水处理能力;当处理时间为180min,溶液温度和初始PCBs浓度分别为25℃和5mg/L时,改性材料对PCBs的吸附率达96%,吸附量为2.97mg/g。改性材料可作为一种廉价、高效的持久性有机废水吸附剂,具有很好的工业应用前景。吸附等温线研究表明,Langmuir方程能较好地描述改性材料的PCBs吸附行为,吸附较容易,升高温度有利于吸附;从吸附动力学角度分析,吸附过程符合准二级动力学模型(R20.99),以化学吸附为主,吸附速率由表面扩散与颗粒内扩散联合控制。
[Abstract]:Using ferrous sulfate as Tie Yuan, nano-iron modified oyster shell material was prepared by in-situ reduction-loading of potassium borohydride. The microstructure of modified oyster shell material was characterized, and the adsorption properties of modified oyster shell material for PCBsof persistent organic substance PCBswere investigated.The experimental results show that the modified oyster shell material has uniform particle size and high dispersion, and the modified oyster shell material has good treatment ability of PCBs wastewater.When the treatment time is 180 min, the solution temperature and initial PCBs concentration are 25 鈩，

本文编号：1734109