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引用本文:池俏俏,朱广伟,张战平,秦伯强.风浪扰动对太湖水体悬浮物重金属含量的影响.湖泊科学,2006,18(5):495-498. DOI:10.18307/2006.0509
CHI Qiaoqiao,ZHU Guangwei,ZHANG Zhanping,QIN Boqiang.Effects of wind-wave disturbance on heavy metal contents in suspended solids of Lake Taihu. J. Lake Sci.2006,18(5):495-498. DOI:10.18307/2006.0509
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风浪扰动对太湖水体悬浮物重金属含量的影响
池俏俏1,2, 朱广伟1, 张战平3, 秦伯强1
1.中国科学院南京地理与湖泊研究所, 南京210008;2.中国科学院研究生院, 北京100039;3.浙江大学环境与资源学院, 杭州310029
摘要:
通过离心浓缩的方法,获取太湖梅梁湾口东岸处(即梅梁湾与贡湖湾的交界处)不同风浪条件下的悬浮颗粒物.冷冻干燥,微波消解,ICP-AES的方法测定了其中Co、Cr、Cu、Ni、Pb、Zn等重金属元素及Al、Ca、Fe、Mn等相关金属元素的含量.结果发现,小风浪(2 m/s)、中风浪(7 m/s)和大风浪(11 m/s)下:①水体总悬浮颗粒态金属的量依次大幅度增加;②单位悬浮颗粒物中各金属元素的含量在不同风浪下变化不同.Ca在小、中、大风浪下含量依次增大;Zn在小、中、大风浪下含量依次减少;Mn和Cu的含量变化趋势相同:与小风浪相比,中风浪下Mn、Cu的含量显著增大;与中风浪相比,大风浪下含量显著减少;其它元素Al、Fe、Ni、Pb、Co、Cr等在单位悬浮物中,中风浪与小风浪相比含量减少,大风浪与中风浪相比含量略微增加.研究表明:①金属元素在水体总悬浮物中的含量主要受风浪影响,但风浪对单位悬浮物中金属含量的影响则因元素而异;②除Cu、Mn、Zn外,悬浮物中重金属含量随粒径增大含量减少.
关键词:  太湖  风浪扰动  悬浮物  重金属
DOI:10.18307/2006.0509
分类号:
基金项目:国家自然科学基金(40203007);中国科学院知识创新工程重大项目(KZCX1-SW-12)联合资助
Effects of wind-wave disturbance on heavy metal contents in suspended solids of Lake Taihu
CHI Qiaoqiao1,2, ZHU Guangwei1, ZHANG Zhanping3, QIN Boqiang1
1.Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China;3.College of Environment and Resources, Zhejiang University, Hangzhou 310029, P. R. China
Abstract:
Surface water was taken from the east shore of the mouth of Meiliang Bay, Lake Taihu. The lake water was sampled under weak (2 m/s), modest (7 m/s) and strong wind-wave (11 ra/s), respectively. Suspended solids (SS) were obtained by centrifuging 25L surface water. SS were further freeze-dried and microwave digested, and the contents of Co, Cr, Cu, Ni, Pb, Zn, Al, Ca, Fe, Mn in SS were determined by ICP-AES. It was found that the particulate metal amounts increased gradually with wind speed. Moreover, different metal contents in SS showed different variation trend with wind speed. The contents of Zn in SS decreased with wind speed ;the contents of Mn and Cu were highest at middle wind speed;and contents of Al, Fe, Ni, Pb, Co, Cr were lowest at the middle wind speed. These results suggested the metal contents in the shallow lake water were mainly influenced by wind-wave disturbance.
Key words:  Lake Taihu  wind-wave disturbance  suspended solids  heavy metals
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