污泥改良盐碱土中污染物的淋滤行为  

Leaching behavior of contaminant in saline-alkali soil amended with sludge

作　　者：孟繁宇[1] 姜珺秋[1] 赵庆良[1,2] 王琨[1,2] 刘纯甫[3,4] 马立 杨俊晨[6] 郑振[7] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [3]中国化学工程股份有限公司 [4]中国天辰工程有限公司,天津300400 [5]哈尔滨排水责任有限公司,黑龙江哈尔滨150010 [6]苏州工业园区设计研究院股份有限公司,江苏苏州215021 [7]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2014年第9期1176-1182,共7页Journal of Harbin Engineering University

基　　金：哈尔滨市科技攻关计划基金资助项目(2010AA4CS024);国家自然科学基金资助项目(51206036);中央高校基本科研业务费专项基金资助项目(HIT.NSRIF.201192)

摘　　要：为了研究施用污泥盐碱土中污染物的淋滤行为,通过孵育实验和淋滤实验研究了施污泥后盐碱土中养分含量、重金属形态分布,以及土柱淋滤液中总有机碳、N、P污染物和重金属含量的变化。结果表明:施用污泥孵育0 d可使土壤有机质增加2.5倍,总氮、磷分别增加4倍、2.4倍;速效氮磷钾分别增加3.2倍、11.6倍和1.2倍。随孵育时间的延长,养分总量有所降低,速效养分有所增加。施用污泥对土壤重金属形态分布影响较小,孵育60 d后,可交换态与碳酸盐结合态的Zn、Ni、Pb明显降低;土壤淋滤液中TOC、TN、NH4+-N、Cr、As、Pb、Ni的浓度随孵育时间的延长而减少,若孵育60 d后改良土壤经历降水,淋滤液中污染物含量已接近对照值。In order to study the leaching behaviors of contaminants in saline-alkali soil amended with dewatered sludge, the changes of nutrients content, heavy metal form distribution and the contents of total organic carbon （ TOC） , N, P contaminants and heavy metals in leachate were investigated through incubation and leaching experi-ment. The results show that organic matter, total nitrogen, total phosphorus, available nitrogen, available phosphor-us and available potassium in soil amended with sludge are increased by 2.5, 4, 2.4, 3.2, 11.6, and 1.2 times re-spectively after sludge application and incubation for 0 d. With the extension of incubation time, the total content of nutrients decreases and that of available nutrients increases. Form distribution of heavy metals in soil is less affected by sludge amendment;Zn, Ni, and Pb in exchangeable and carbonate combined states decrease after incubation for 60 d. The contents of TOC, total nitrogen （ TN） , NH4＋-N, Cr, As, Pb, Ni reduce with incubation time. If it rains after incubation period of 60 d, contaminant contents in leachate will be close to the contrast values.

关 键 词：脱水污泥 盐碱土 孵育实验 淋滤实验 土壤养分 氮磷污染物 重金属 

分 类 号：X703.5[环境科学与工程—环境工程]