连环湖区域小东湖表层沉积物重金属污染及潜在生态风险  

POLLUTION AND POTENTIAL ECOLOGICAL RISK OF HEAVY METALS IN SURFACE SEDIMENTS FROM XIAODONG LAKE IN LIANHUAN LAKE ZONE

作　　者：肖海丰[1] 臧淑英[1] 关莹[1] 刘少军[1] 徐海凤[1] 孙清展[1] 王京京[1] 李苗[1] 裴雪原[1] 

机构地区：[1]哈尔滨师范大学黑龙江省普通高等学校地理环境遥感监测重点实验室,哈尔滨150025

出　　处：《环境工程》2014年第1期130-134,107,共6页Environmental Engineering

基　　金：国家自然科学基金(40972115);国家自然科学基金重点项目(41030743);黑龙江省高等学校科技创新团队建设计划项目(2010td10)

摘　　要：以松嫩平原西侧的小东湖为研究对象,采用HNO3-HClO4-HF联合消解并运用ICP—MS测试了重金属元素Cr、Cu、Mn、Ni、Pb、Zn和Cd的浓度,结合粒度测定,运用潜在生态风险指数法评价方法,研究了小东湖重金属空间分布、污染状况和生态风险。结果显示,小东湖重金属元素浓度大小排序为Mn>Zn>Cr>Ni>Pb>Cu>Cd,重金属元素Mn、Cr、Zn、Ni、Cu在中心位置出现最高值。Cr、Mn、Ni和Zn的浓度主要受细粒物质影响,它们的浓度与TP高度正相关。小东湖重金属以中等污染为主,Cr、Cu、Mn、Ni、Pb和Zn属轻微的潜在生态风险。Cd在不同点位分别存在轻微、中等和强的潜在生态风险。Sediments from Xiaodong Lake were studied in the west of Songnen Plain in eastern China. The sediment samples were digested using HNO3-HC1Q-HF. Concentrations of the metals Cr, Cu, Mn, Ni, Pb, Zn and Cd were determined using inductively coupled plasma-mass spectrometry （ICP-MS）, and particle size, combined with potential ecological risk index （RI） were used to indicate spatial distribution,pollution and potential ecological risk. The results showed that the contents of these heavy metals in the surface sediments followed the descending of Mn 〉 Zn 〉 Cr 〉 Ni 〉 Pb 〉 Cu 〉 Cd. The contents of these heavy metals Mn, Cr, Zn, Ni and Cu were maximum in the center of Xiaodong Lake. The contents of Mn, Cr, Ni and Zn are influenced by fine grain size. The contents of Mn, Cr, Ni and Zn have a strong correlation with TP. The heavy metals in most sediments showed moderate potential ecological risk. Cr, Cu, Mn, Ni, Zn and Pb showed light ecological risk in the suface sediments of Xiaodong Lake. Cd showed light, moderate and seriously ecological risk, respectively in different sampling points.

关 键 词：沉积物 重金属污染 小东湖 潜在生态风险评价 

分 类 号：X820.4[环境科学与工程—环境工程]