20年来第二松花江汞污染自净规律研究-环境科学学报.PDF

第 27 卷第 3 期 环 境 科 学 学 报 Vol. 27, No. 3 2007年 3月 Acta Scientiae Circumstantiae M ar. , 2007 王起超, 邵志国, 张磊. 2007. 20年来第二松花江汞污染自净规律研究[ J]. 环境科学学报, 27( 3): 474- 479 W ang Q C, Shao G, hang L. 2007. Study on sel-f purification of the Second Songhua R iver polluted by m ercury in past 20 years[ J]. Acta Scientiae C ircum stantiae, 27( 3): 474- 479 20 * 王起超 , 邵志国, 张磊 中国科学院东北地理与农业生态研究所, 长春 130012 : 2006-04-04 : 2006-11-25 : 2006-12-31 : 研究了受到汞严重污染的第二松花江 20年来水体净化过程, 并对已有的模型进行了检验. 利用切断污染源后 5次系统监测资料, 通过回 归分析建立了沉积物和平水期江水汞浓度变化的数学模型. 同时, 对未来 15a水体汞污染趋势进行了预测. 结果表明, 第二松花江汞污染自然 净化取得明显成效; 表层沉积物净化速率高于中下层; 第二松花江水体自然净化经历两个阶段, 在汞污染源切断初期第二松花江汞污染净化速 率较快, 目前处于净化速率较慢的时期. 预测结果显示, 未来水体净化速率将更为缓慢. : 汞污染; 自净; 模型; 预测; 第二松花江 : 0253-2468( 2007) 03-0474-06 : X522 : A Study on self-purification of the Second Songhua River polluted by m ercury in past 20 years * WANG Q ichao , SHAO higuo, HANG Lei R eceived 4 April 2006; received in revised form 25 November 2006; accepted 31 December 2006 A bstract: The self-purifying process of the Second Songhua R iver polluted bym ercury in the past 20 years is investigated, and the specific presentm odels are tested in this paper. The m athem aticalmodels ofm ercury concentration in the sedmi ents, and riverw ater during the rainless period are established by fitting the data, which w ere collected for five tmi es after cutting off the po llution sources. Furtherm ore, m ercury pollution in the Second Songhua R iver in the follow ing 15 years is predicted by using the m odels. The research results indicate that self-purify ing effect of the Second Songhua R iver po lluted by m ercury is evident. It is concluded that the self-purifying rate of the surface layer sedmi ent is higher than that in the m iddle and the bottom laye