不同方式处理蛭石对磷吸附性能研究
Phosphate adsorption using vermiculite with different treatment methods

郑易安王爱勤

文摘	分别采用酸处理、盐交换、热处理和有机化处理方式对临泽蛭石进行了改性,考察了不同处理方式对磷(PO_4-P)的吸附效果.在此基础上,选用960 ℃处理蛭石制备了磁性吸附剂,对比研究了吸附时间、PO_4-P浓度和pH对原蛭石、热处理蛭石和磁性蛭石吸附PO_4-P的影响.结果表明,960 ℃处理蛭石对PO_4-P的吸附量可达(6.4 mg P/g).处理蛭石提高了对PO_4-P的初始吸附速率,在很宽的pH范围内(4.0～8.0)具有高的吸附量,较低的pH有利于PO_4-P的脱附.
其他语种文摘	Vermiculite was modified by means of acid activation,salt exchange,heat treatment and organification, and then used as the adsorbent to investigate its adsorption capacity for phosphate (PO_4-P) from the aqueous solution.According to above research,960 ℃ was selected to treat vermiculite and obtain a magnetic adsorbent,and a comparative study was carried out to evaluate the effects of contact time,PO_4-P concentration and pH values on PO_4-P adsorption.The results indicated that vermiculite treated at 960 ℃ has the highest adsorption capacity of 6.4 mg P/g for PO_4-P. By modification, vermiculite shows a faster adsorption rate and an improved adsorption capacity for PO_4-P within a wide pH range (4.0～8.0).(Lower) pH value is beneficial for the desorption of PO_4-P from the vermiculite.
来源	应用化工 ,2010,39(2):204-208 【扩展库】
关键词	蛭石 ; 磷 ; 吸附 ; 处理方式 ; 磁分离
地址	中国科学院兰州化学物理研究所, 甘肃, 兰州, 730000
语种	中文
文献类型	研究性论文
ISSN	1671-3206
学科	行业污染、废物处理与综合利用
基金	甘肃省科技厅科技支撑项目
文献收藏号	CSCD:3816344