粉末活性炭对水中重金属离子的吸附性能研究  

Study on the Adsorption of Heavy Metal Ions in Water by Powdered Activated Carbon

作　　者：韩立志[1] 凌瑶[1] 徐霞[1] 王煜[1] 史载锋[1] 

机构地区：[1]海南师范大学化学与化工学院,海南海口571158

出　　处：《海南师范大学学报（自然科学版）》2017年第1期24-27,共4页Journal of Hainan Normal University（Natural Science）

基　　金：海南省自然科学基金资助项目(20152033)

摘　　要：活性炭是一种具有丰富孔隙结构和巨大比表面积的碳质吸附材料,在污水净化领域具有广泛的应用价值.根据单一变量原则,研究了粉末活性炭对水中重金属离子Cr(VI)、Cu(Ⅱ)和Fe(Ⅲ)的吸附作用.实验结果表明,粉末活性炭能有效去除3种重金属离子,且去除效果受温度、吸附时间、活性炭用量、溶液p H值的影响.随着活性炭用量、温度或吸附时间的增加,3种离子的去除率先增后减,而溶液p H值增加时,Cu(Ⅱ)离子的去除率几乎不变,Cr(VI)和Fe(Ⅲ)离子的去除率却逐渐降低.吸附时间超过30 min时,粉末活性炭对3种离子中的Cu(Ⅱ)离子去除效果最好,去除率达90%以上.Cu(Ⅱ)离子的去除最优条件为40℃(温度)、30 min(吸附时间)、0.15 g(活性炭用量)和2.0(p H).Activated carbon is a kind of carbon based adsorption material with abundant pore structure and large specific surface area, which is widely used in the field of sewage purification. In this paper, adsorption process of heavy metal ions （Cr（VI）, Cu（ II ）, and Fe（ III ）） in water by powdered activated carbon （PAC） is studied. The results show that three ions could be adsorbed effectively by PAC and adsorption capacity of PAC is affected by temperature, adsorption time, PAC dosage, and pH value of solution. The removal rates of three ions rose first and then drop with the increasing of tempera- tures, adsorption times, or PAC dosages. The removal rate of Cu（ ]] ） changes little with the increasing of pH value of solution, but the removal rates of Cr（VI） and Fe （ III ） decrease. The removal effect of Cu（ II ） by PAC is the best among the three ions when adsorption time is more than 30 rains, and its removal rate gets to above 90%. The optimal conditions of adsorption for Cu（ II ） are 40 ℃ in temperature, 30 rain in adsorption time, 0.15 g in PAC dosage and 2.0 in pH value.

关 键 词：粉末活性炭 重金属离子 吸附 

分 类 号：TQ085[化学工程] X522[环境科学与工程—环境工程]