不同粘土矿物材料对Pb^(2+)的吸附特征  

The Absorption of Characteristics of Pb^(2+) with Different Clay Minerals

作　　者：王宜鑫[1] 赵斌[1] 汤炎[1] 陈小峰[1] 钱晓晴[1] 封克[1] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225009

出　　处：《工业安全与环保》2007年第2期1-3,共3页Industrial Safety and Environmental Protection

基　　金："江苏省环境材料与环境工程重点实验室"基金资助项目

摘　　要：探讨了在不同矿物投加量、不同振荡时间、不同Pb2+浓度、不同矿物颗粒细度和不同pH条件下,钠基膨润土、膨胀蛭石和沸石3种粘土矿物对Pb2+的吸附效果。结果表明:对于具有可膨胀层间的粘土矿物而言,其对溶液中Pb2+的吸附量不仅仅由单一的阳离子交换量所决定;Pb2+在矿物表面的吸附过程是个迅速的过程,矿物对Pb2+的吸附在10min内即可完成;粘土矿物不同颗粒细度对Pb2+的去除率有所不同,但考虑到实际应用中的成本问题,并非颗粒越细越好;就试验所采用的3种粘土矿物而言,其对Pb2+的吸附效果是,钠基膨润土和沸石明显优于膨胀蛭石;较高的pH有助于粘土矿物对溶液中Pb2+的吸附,但考虑到实际操作的其他因素,不能把pH调得过高。In this paper, the absorption effect of three clay minerals, Na- bentonite, expansibility vermiculite and zeolite, on Pb^2＋ are studied in different conditions such as the amount of minerals, shaking time, the concentration of Pb^2＋, the granularity of minerals and pH value. The results show that the quantity of absorption by expansibility day mineral is not just decided by single CEC; the absorption of Pb^2＋ on day mineral surface is a rapid process, which is completed in ten minutes; the different granularity of day minerals have different absorption effects on Pb^2＋ , but it is not the best way conaidering the cost in actual application. In this study the absorption effect of Na-bentonite and zeolite on Pb^2＋ is obviously betterthan expansibility vermiculite; the higher pH value helps the absorption of Pb^2＋, but the pH value can not be regulated too high considering other factors in actual operations.

关 键 词：粘土矿物 PB^2+ 吸附 

分 类 号：X132[环境科学与工程—环境科学]