| 浙江省东部土壤元素地球化学特征及意义 |
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| 引用本文： | 魏华玲,周国华,孙彬彬,刘占元,曾道明.浙江省东部土壤元素地球化学特征及意义[J].吉林大学学报(地球科学版),2013,43(2):564-572. |
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| 作者姓名： | 魏华玲 周国华 孙彬彬 刘占元 曾道明 |
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| 作者单位： | 中国地质科学院地球物理地球化学勘查研究所，河北 廊坊065000 |
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| 基金项目： | 国家“全国土壤现状调查及污染防治”专项项目(GZTR20060206) |
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| 摘 要： | 为了研究土壤和稻米元素地球化学分布特征及影响稻米中重金属质量分数的主要因素，对浙江省东部农田根系土-稻谷样品进行了采集和分析。结果表明：各研究区均有重金属元素质量分数高于区域地球化学背景值,尤其是温州南郊地区的Hg、台州泽国地区Cd、绍兴北郊地区的Hg，其质量分数分别是背景值的6倍、5倍及9倍；7个研究区中，只有嘉兴新胜地区的As质量分数超过背景值。其原因是这些地区工业化进程迅速，人为活动频繁，污染较严重。绍兴北郊、嘉兴新丰、嘉兴新胜和桐乡崇福地区稻米中As、Cd、Cr、Hg、Se和Pb质量分数均未超过标准限值。稻米对重金属元素的吸收富集主要受土壤有机质、pH、土壤阳离子交换量和黏粒组成等土壤理化性质的影响：土壤有机碳越丰富越有利于稻米对As、Cd、Cr和Ni的吸收；稻米对As、Cd、Mn和Ni的富集系数随着pH上升而下降；土壤阳离子交换量和黏粒组成与水稻As、Cu、Hg、Mn、Pb、Se和Zn的富集系数呈显著负相关。
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| 关 键 词： | 地球化学 重金属 理化指标 元素迁移与富集 浙江省东部 土壤 |
| 收稿时间： | 2012-05-12 |
Significance and Characteristics of Soil Trace Elements Geochemistry in the Eastern of Zhejiang Province,China |
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| Wei Hualing,Zhou Guohua,Sun Binbin,Liu Zhanyuan,Zeng Daoming.Significance and Characteristics of Soil Trace Elements Geochemistry in the Eastern of Zhejiang Province,China[J].Journal of Jilin Unviersity:Earth Science Edition,2013,43(2):564-572. |
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| Authors: | Wei Hualing Zhou Guohua Sun Binbin Liu Zhanyuan Zeng Daoming |
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| Institution: | Institute of Geophysical and Geochemical Exploration，Chinese Academy of Geological Sciences, Langfang065000, Hebei,China |
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| Abstract: | Through sampling and analyzing rice grains and cultivation-layer soils , the distribution characteristics of soil trace elements and the main factors influencing elements transfer in soil-rice system were studied in the anomalous areas of eastern of Zhejiang Province. The results showed that mass fractions of some trace elements were higher than the regional geochemical background values in each study area. Especially, the average mass fraction of Hg was six times more than regional geochemical background value in the south of Wenzhou, Cd was five times in the Zeguo of Taizhou, and Hg was three times in the north of Shaoxing area. In these seven studied area, only in Xinsheng of Jiaxing area, the average mass fracrion of As was higher than regional geochemical background value. Industrialization rapidly and anthropogenic influence were the main reasons of the pollution. As, Cd, Cr, Hg, Se and Pb mass fractions in rice did not exceed tolerable concentrations in the north of Shaoxing, Xinfeng of Jiaxing, Xinsheng of Jiaxing, and Chongfu of Tongxiang.The transfer factors of potential toxic elements from soil to rice grains usually had a good relationship with soil properties including organic matter, pH, CEC and granularity. The transfer factors of As, Cd, Cr and Ni tended to increase as soil organic matter increased and decrease as pH increased. CEC, fine silt and clay component had negative effects on rice's transfer factors of As, Cu, Hg, Mn, Pb, Se and Zn. |
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| Keywords: | geochemistry trace element soil property transfer factor eastern of Zhejiang Province |
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