膜分离腐殖酸前后晚期渗沥液的活性炭吸附特性研究

Adsorption Characteristics of Organic Matter on Activated Carbon in Mature Landfill Leachate and Its Permeate from Membrane Separating Process

对晚期渗沥液及膜分离提取腐殖酸后的透过液进行了活性炭吸附特性研究。结果表明:活性炭对晚期渗沥液和膜透过液中有机物的吸附符合Freundlich吸附等温线,吸附效果良好。活性炭对晚期渗沥液中有机物具有较好的吸附效果,对腐殖酸表现出优先吸附作用,对其中较低分子量的有机物会选择性地吸附;膜透过液中相对较高分子量的富里酸难于被吸附,而分子量较低的富里酸和其他有机物则较易被吸附,TOC和E2去除率分别达到75%和72%,膜透过液的活性炭最佳投加量为8g/L。

A series of activated carbon adsorption experiments were conducted to mature leachate and its permeate respec-tively and adsorption isothermal and absorbency curve for both mature leachate and its permeate were obtained. The results showed that refractory organic matter of mature leachate and its permeate had a priority in activated carbon adsorption. The ad-sorption isotherm of organic matter of both mature leachate and the permeate generating from mature leachate recycling process obeyed the Freundlich pattern under experimental temperature condition. Low molecular weight organic substances of the permate are easily to be absorbed. Removal rates of TOC and E2 reached to 75% and 72% respectively, optimum dose of activated car-bon in treatment of the permeate was 8 g/L.