红枫湖生物地球化学过程中Zn的赋存形态及季节性变化特征
Speciation and seasonal variations of zinc in biogeochemical processes in Hongfeng Lake
查看参考文献35篇
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文摘
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通过对贵阳市红枫湖中溶解态锌、颗粒态锌及颗粒态锌中不同结合形态的研究，探讨了红枫湖生物地球化学过程中锌的主要赋存形态与季节性变化规律。结果发现，红枫湖总锌的质量浓度为0．72ug·L~(-1)～13．04ug·L~(-1)，污染较轻。红枫湖南湖总锌全年均高于北湖，主要是位于南部的羊昌河输入所致。红枫湖水体中锌的主要赋存形式是溶解态锌（占总锌的70％1；颗粒态中AEC（吸附态-可交换态-碳酸盐结合态）结合态锌是最主要的赋存形式（占颗粒态锌的72％）。溶解态锌含量夏季低而冬季高，主要是因为夏季生物吸收与吸附、以及冬季沉积物孔隙水向上覆水体的释放。颗粒物中有机结合态锌的变化主要受湖泊藻类繁殖的影响。 |
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其他语种文摘
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Main speciation of Zn and its seasonal variations during biogeochemical processes in Hongfeng Lake, located in Guiyang city, were studied, by determination of Zn concentrations in dissolved and particulate phases, and Zn speciation in suspended particulate matter （SPM） in different seasons. The results showe that the concentration of total Zn ranged from 0.72 ug·L~(-1) to 13.04 ug·L~(-1), suggested a slight pollution. In general, the south part of the Lake, influenced by discharge of Yangchang River, had higher dissolved and particulate Zn than the north one. By comparison, dissolved species was the major Zn carrier （70% on average of the total concentrations）, and the adsorbed, exchangeable and carbonate-bound Zn was the major form in SPM （72% on average of the particulate concentrations） in all seasons. Dissolved Zn concentration in summer was lower than that in winter, which were ascribed to adsorption and absorption by algae in summer and diffusion from pore water in winter, respectively. Moreover, variations in speciation of Zn bound to organic matter in SPM was mainly affected by algae reproduction. |
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来源
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生态环境
,2008,17(4):1354-1361 【扩展库】
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关键词
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溶解态锌
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颗粒态锌
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季节变化
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红枫湖
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地址
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵州, 贵阳, 550002
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-2175 |
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学科
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环境科学基础理论 |
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基金
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国家973计划
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中国科学院创新团队国际合作伙伴计划
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国家自然科学基金
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“西部之光”联合资助项目
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文献收藏号
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CSCD:3405388
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