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工矿绿洲城郊排污渠沉积物的缓冲能力及重金属释放动力学

发表时间:2015-12-31  浏览量:1760  下载量:550
全部作者: 臧飞,王胜利,南忠仁,王德鹏,任业萌,王宇,陈亚州
作者单位: 兰州大学资源环境学院
摘 要: 研究了干旱区工矿型绿洲(以白银市为例)城郊排污渠沉积物对酸碱的缓冲能力,以及在酸性条件下重金属Cu,Zn的释放动力学。结果表明:东、西大沟沉积物对碱的缓冲能力小于对酸的缓冲能力,其中,样点S3,S5对酸的缓冲能力较强,S2,S6对碱的缓冲能力较强。Cu,Zn的释放动力学分为快速释放阶段和释放平衡阶段,且释放量随时间的延长而降低,Cu在释放8 h左右达到平衡,Zn在释放12 h左右达到平衡。
关 键 词: 土壤环境学;沉积物修复;重金属;缓冲能力;动力学
Title: Buffer ability and kinetics of heavy metal release in suburban outfall sediments of industrial oasis region
Author: ZANG Fei, WANG Shengli, NAN Zhongren, WANG Depeng, REN Yemeng, WANG Yu, CHEN Yazhou
Organization: College of Earth Environmental Sciences, Lanzhou University
Abstract: The buffer ability in sediments with acid and base, and the releasing kinetics of Cu and Zn in sediments at the acidic condition in suburban outfall of industrial oasis region (taking Baiyin city as a case) were studied. The results showed that the base buffer ability was less than the acid buffer ability, the acid buffer ability of S3 and S5 was stronger than other samples, the base buffer ability of S2 and S6 was stronger than other samples. The kinetics of Cu and Zn release was biphasic: the quickly releasing phase, and the releasing balance phase, and the amount of release decreased with the extension of time, the releasing balance time of Cu was about 8 h, and the releasing balance time of Zn was about 12 h.
Key words: soil environmentology; sediment remediation; heavy metals; buffer ability; kinetics
发表期数: 2015年12月第24期
引用格式: 臧飞,王胜利,南忠仁,等. 工矿绿洲城郊排污渠沉积物的缓冲能力及重金属释放动力学[J]. 中国科技论文在线精品论文,2015,8(24):2593-2598.
 
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