摘要
研究表明,采用PAC作混凝剂、焦炭作吸附剂,可有效去除渗滤液中的COD 和各部分重金属离子。PAC和焦炭投量分别为400 mg/L和8 ~10 g/L时,COD 去除率达58 .9 % ,重金属离子的去除率均达60 % 左右,其中对Cu 的去除近100 % ;混凝和吸附对各污染物的去除具有互补性,因而此工艺具有良好的运行灵活性和稳定性。混凝对渗滤液色度具有明显的去除效果(68 % ) ;焦炭吸附中存在明显的竞争现象,其中对COD
A study on the pretreatment of landfill leachate by coagulation-adsorption was carried out and reported in this paper. The results showed that the effective removal of COD and heavy metals could be obtained by using PAC as coagulant and processed coke as absorbent. With PAC dosage of 400 mg/L and processed coke dosage of 8~10 g/L, 58.9% of COD and about 60% of heavy metals removals were achieved, of which the removal of Cu was nearly 100%. The mutually complement action of coagulation and adsorption processes was found which would promote the stable and flexible operation. In addition, 68% of color reduction and adsorption processes was found which would promote the stable and flexible operation. In addition, 68% of color reduction was achieved by coagulation at PAC dosage of 400 mg/L. In adsorption process, the obvious competitive adsorption phenomenon was observed and COD possessed a strong competitive potential because of its high concentration in leachate.
出处
《中国给水排水》
CAS
CSCD
北大核心
1999年第11期10-14,共5页
China Water & Wastewater
基金
江苏省"青蓝工程"跨世纪学术带头人资助
关键词
垃圾渗滤液
物化预处理
PAC
焦炭
landfill leachate
physicochemical pretreatment
PAC
coke