多种材料对重金属Cr(VI)的吸附性能研究

本以废物资源化为目的，以寻找廉价而有效的吸附材料为出发点，分别对活性炭，粉煤灰，蛭石，蜂窝煤渣，废酵母等五种材料吸附Cr(VI)的效果进行了实验。结果表明，（1）每种吸附剂的剂量与铬去除率之间均成正相关关系，铬的去除率随吸附剂用量的增加而增加；（2）作为参照物的活性炭吸附效果最好，对（Cr(VI)的去除率可达99．78％，而啤酒酵母，改性蜂窝煤渣，粉煤灰，蛭石的最大吸附量分别可达到活性炭最大吸附量的94．84％，52．37％，45．11％，37．67％；（3）所选用实验材料的吸附性能由优到劣的排序为：啤酒酵母＞改性蜂窝煤渣＞粉煤灰＞蛭石。

A STUDY ON THE ADSORPTIVE PROPERTIES OF VARIOUS MATERIALS IN PROCESSING HEAVY METAL CR(VI)

The present paper is aimed at turning waste material into useful one by trying to use their adsorptive properties in processing heavy metal Cr(VI). The experiments we have done with various materials, such as active charcoal, coal fly ash, vermiculites, honeycomb cinder and beer yeast for their property to absorb Cr(VI), have shown that there exists a proportional relationship between the amount of removing Cr(VI) and the increase of the each respective adsorptive material. A careful comparison indicates that active charcoal absorbs most efficiently with its rate of removing Cr(VI) being as high as 99.78%. Next comes the beer yeast with the rate of 94.84%. Then follows honeycomb cinder (52.37%) and coal fly ash (45.11%). Last of all come vermiculites (merely 37.67%). Therefore it can be concluded that the adsorptive efficiency of beer yeast is stronger than the improved honeycomb cinder, which is in turn bigger than coal fly ash and vermiculites. Though beer yeast is a kind of industrial waste, it enjoys actually excellent adsorptive property after pre-treatment, which can be used to deal with thick waste water containing Cr(VI), with its rate of removing Cr(VI) being as high as 94.63%. For its many distinguished features, for example, easy separation, thorough-going deposition, easy reproduction and recovery, low price and so on, it is a new-type organic adsorptive material that will be in a position to replace active charcoal. Thus, it can be taken as a really promising industrial material with great exploring potential and board application prospect.