九龙江表层沉积物重金属赋存形态及生态风险
Speciation and Ecological Risk of Heavy Metals in Surface Sediments from Jiulong River
查看参考文献26篇
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文摘
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分别用改进的BCR四步提取法和稀硝酸单级提取法分析九龙江17个表层沉积物中15种重金属元素的赋存形态特征. BCR四步提取法表明,九龙江表层沉积物中大部分重金属(Fe、Ni、V、Tl、Ba、Sb、Ga、Cr和Sr)以残渣态为主; Mn可提取态含量最高(占总量83.8%),其次为Cd、Pb、Zn、Co和Cu(分别占总量80.0%、75.5%、74.3%、70.8%和57.7%).稀硝酸提取法表明,Pb、Mn、Cd、Co、Zn和Cu的稀硝酸可提取态具有较高比例(分别占总量70.4%、65.4%、58.7%、48.4%、44.5%和45.5%).次生相与原生相分布比值法(RSP)评价结果表明,九龙江表层沉积物中Pb、Mn、Cd、Co、Zn和Cu具有较高生态风险.综合对比两种提取方式分析结果,各有优缺点.一般情况下,稀硝酸单级提取法已足以分析沉积物中重金属生物有效性及生态风险. |
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其他语种文摘
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Speciation characteristics of fifteen heavy metals in seventeen surface sediments from Jiulong River was analyzed using the modified BCR protocol and dilute HNO_3 method, respectively. The results of the modified BCR protocol showed that most of the elements (Fe, Ni, V, Tl, Ba, Sb, Ga, Cr and Sr) existed mainly in residual fractions, and extractable fraction was dominant for Mn (83.8%), followed by Cd, Pb, Zn, Co and Cu (80.0%, 75.5%, 74.3%, 70.8% and 57.7%). The results of dilute HNO_3 method showed that the proportions of the dilute HNO_3-extractable fractions of Pb, Mn, Cd, Co, Zn and Cu were higher (70.4%, 65.4%, 58.7%, 48.4%, 44.5% and 45.5%). The assessment results of RSP (ratio of secondary phase to primary phase) indicated that Pb, Mn, Cd, Co, Zn and Cu in surface sediments of Jiulong River had higher ecological risks. Both extraction methods had merits and demerits respectively. In general, the dilute HNO_3 method is enough to analyze the bioavailability and ecological risk of heavy metals in sediments. |
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来源
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环境科学
,2017,38(3):1002-1009 【核心库】
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DOI
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10.13227/j.hjkx.201607087
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关键词
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BCR提取
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稀硝酸单级提取
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RSP
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生物有效性
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九龙江
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地址
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1.
华侨大学化工学院, 厦门, 361021
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华侨大学化工学院, 环境地球化学国家重点实验室, 厦门, 361021
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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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0250-3301 |
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学科
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环境污染及其防治 |
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基金
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国家自然科学基金项目
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中国科学院贵阳地球化学研究所环境地球化学国家重点实验室基金
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华侨大学研究生科研创新能力培育计划资助项目
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文献收藏号
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CSCD:5938863
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