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天山土壤微量(类)重金属的来源解析及潜在生态危害评估 被引量:5
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作者 张兆永 吉力力.阿不都外力 姜逢清 《应用生态学报》 CAS CSCD 北大核心 2014年第11期3168-3176,共9页
从天山山地3个区段(巴里坤-伊吾、乌鲁木齐-阿克苏、昭苏-特克斯)采集土壤样品,测定了其中(类)重金属Pb、Ni、Cd、Co、Hg、Cu、Mn、Zn、Cr和As的含量.运用经典统计学与多元统计方法分析了这些(类)重金属的来源;同时采用污染指数法与潜... 从天山山地3个区段(巴里坤-伊吾、乌鲁木齐-阿克苏、昭苏-特克斯)采集土壤样品,测定了其中(类)重金属Pb、Ni、Cd、Co、Hg、Cu、Mn、Zn、Cr和As的含量.运用经典统计学与多元统计方法分析了这些(类)重金属的来源;同时采用污染指数法与潜在生态风险指数法,并结合天山及新疆土壤背景值、国家土壤质量标准开展了区域土壤微量(类)重金属生态风险的评价.结果表明:所测10种(类)重金属的平均含量均高于天山或新疆土壤背景值.从变异系数来看,均为中等变异.总体上看,天山山地土壤中10种(类)重金属的含量均较低;主成分分析显示,10种元素可以辨识出2个主成分,主成分1(PC1,包括Cd、Pb、Hg、Mn和Zn)为人为源因子,主成分2(PC2,包括Cu、Ni、Cr、Co和As)为自然源因子.Mn和As在PC1和PC2上均有较大载荷,主要受人为源和自然地质背景的共同控制;污染评价表明,重金属Hg、Cd在天山中部的乌鲁木齐-阿克苏区段、As在天山西部的昭苏-特克斯区段的单因子污染指数(Pi)属于警戒等级,其他均属于安全等级和清洁水平.从综合污染(Pz)指数来看,天山中部乌鲁木齐-阿克苏区段土壤中10种(类)重金属元素的综合污染程度均属于轻度污染,其他两个区段均属于清洁水平;生态风险评估表明,重金属Hg、Cd在天山中部乌鲁木齐-阿克苏区段,As在天山西部昭苏-特克斯区段的潜在生态风险系数(Eir)和生态危害指数(RI)相对较高. 展开更多
关键词 天山山地 土壤()重金属 污染评价 生态风险 多元统计
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Study on Influencing Factors of Farmland Soil Heavy Metals in Central Yunnan Province 被引量:2
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作者 余小芬 陈军 +3 位作者 彭荣珍 邱学礼 付斌 倪明 《Agricultural Science & Technology》 CAS 2013年第4期645-650,共6页
[Objective] This study aimed to explore the relationship between contents of heavy metals with soil type, altitude distribution as well as physical and chemical properties. [Method] Based on determination of contents ... [Objective] This study aimed to explore the relationship between contents of heavy metals with soil type, altitude distribution as well as physical and chemical properties. [Method] Based on determination of contents of soil heavy metals and soil physical and chemical properties from agricultural land in Central Yunnan Province, the relationship between soil heavy metals with soil type, altitude distribu- tion and soil physical and chemical properties were analyzed. [Result] The average contents of all heavy metals in farmland of Central Yunnan didn't extend their limits of Grade II in the National Soil Environmental Quality Standard (GB15618-1995). and the heavy metals content in red soil was higher than that in other types. Soil Cd content changes slightly with the altitude, while contents of other heavy metals were greatly affected by altitude. There were extremely significant positive correlation between heavy metals and clay particle content, that is, soil with heavier texture has more heavy metals. There was positive correlation between pH and each heavy metal content; there were positive correlation between Mn with Pb, Cd, Hg and Hg; exchangeable Ca and Mg contents in soil show negative correlations with most heavy metals. [Conclusion] This study has provided scientific bases for the heavy metal management in Central Yunnan area. 展开更多
关键词 Soil type Altitude distribution Physical and chemical properties Heavy metals
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Research on Distribution Pattern of Heavy Metals in Yanzhou Coalfield 被引量:1
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作者 ZHOU Guang-zhu YANG Feng-jie +1 位作者 CHENG Jian-guang Wang Cui-zhen 《Journal of China University of Mining and Technology》 EI 2005年第4期334-338,共5页
Heavy metal pollution brings extensive concerns since 1940s. In order to assess the heavy metal pollution on the farmland of Yanzhou coalfield, 216 soil samples and 54 combined samples were collected. Lead, cadmium, c... Heavy metal pollution brings extensive concerns since 1940s. In order to assess the heavy metal pollution on the farmland of Yanzhou coalfield, 216 soil samples and 54 combined samples were collected. Lead, cadmium, chromium, copper, zinc, and nickel contained in both topsoil and deep soil were analyzed using atomic absorbent spectrometry analyzer (AAS). Fuzzy clustering method was used in data processing. And fuzzy synthetic assessment was applied to assess the soil contamination by heavy metals. The result shows that Yanzhou coalfield has been polluted by the heavy metals to some extent. 展开更多
关键词 Yanzhou coalfield soil pollution heavy metal fuzzy clustering
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