| 大型铜冶炼厂周边农田区大气重金属沉降特征研究 |
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| 引用本文： | 陶美娟,;周静,;梁家妮,;崔红标,;徐磊,;祝振球.大型铜冶炼厂周边农田区大气重金属沉降特征研究[J].农业环境保护,2014(7):1328-1334. |
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| 作者姓名： | 陶美娟 ;周静 ;梁家妮 ;崔红标 ;徐磊 ;祝振球 |
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| 作者单位： | [1]中国科学院南京土壤研究所,南京210008; [2]国家红壤改良工程技术研究中心中国科学院红壤生态实验站,江西鹰潭335211; [3]中国科学院大学,北京100049 |
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| 基金项目： | 国家“973”课题“微/纳米材料对重金属重度污染土壤修复的原理及其示范”（2013CB934302）;赣鄱英才555工程;国家科技支撑计划课题“红壤耕地次生障碍修复技术研究与集成示范”（2011BAD41801）;2010年度国家重金属污染防治专项资金“江铜贵冶周边区域九牛岗土壤修复示范项目”. |
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| 摘 要： | 为探索铜冶炼厂周边农田区大气重金属沉降的时空变异特征，以冶炼厂为中心，四周等距离均匀分设8个监测点，于2012年5月至2013年4月，根据酸沉降检测技术规范，采收大气干湿沉降混合样品，利用原子吸收分光光度法分析样品中cu、cd、Pb、zn、cr含量，计算各监测点所代表区域各类重金属沉降通量。结果显示，研究区重金属cu、cd、Pb、zn、cr的年沉降通量分别为638、6．56、70．0、225、22．7mg·m^-1·a^-1。五种重金属沉降量具有一定的时间变化特征，其中cd、zn和cr的月际间变化显著（P〈O．05，n=96），Pb、zn、cr季节间变化显著（P〈O．05，n=32），而cu无显著的月间或季间变化。空间上，cu、cd、Pb年沉降通量有极显著性差异（P〈0．Ol，n=8），以铜冶炼厂西南方向的九牛岗监测点最高，而zn和cr则无显著性差异。
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| 关 键 词： | 大气沉降 重金属 时空变异 农田区 |
Atmospheric Deposition of Heavy Metals in Farmland Area Around a Copper Smelter |
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| Institution: | TAO Mei-juan, ZHOU Jing, LIANG Jia-ni, CUI Hong-biao, XU Lei, ZHU Zhen-qiu ( 1.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; 2.National Engineering Research and Technology Center for Red Soil Improvement, Red Soil Ecological Experiment Station, Chinese Academy of Sciences, Yingtan 335211, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China ) |
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| Abstract: | Atmospheric deposition is one of transport approaches of heavy metals. Farmland is facing heavy metal pollution from the sur- rounding industries. In this study, we selected a typical farmland area to explore the spatial-temporal variation characteristics of heavy metal deposition around a copper smelter. Between May, 2012 to April, 2013, atmospheric deposition samples（dry and wet） were collected month- ly at 8 monitoring sites. The annual deposition fluxes of heavy metals were 638.0 mg·m^-2·a^-1, 6.56 mg· m^-2· a^-1, 70.0 mg· m^-2· a^-1, 225.0 mg· m^-2·a^-1, and 22.7 rag· m^-2·a^-1 for Cu, Cd, Pb, Zn and Cr, respectively. These heavy metals showed temporal variations. Zinc and Cr deposi- tions had significant monthly and seasorml variations （P〈0.05）, but Cd showed significant monthly variation only （P〈O.05, n=96）, and Pb seasonal differences only（P〈0.05, n=32）. However, no significant monthly or seasonal variations were found for Cu deposition. The annual deposition fluxes of Cu, Cd and Pb had markedly difference between monitoring sites（P〈0.01, n=8 ）, but not for Zn and Cr（P〉0.05, n=8 ）. |
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| Keywords: | atmospheric deposition heavy metals spatial-temporal variation farmland area |
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