ln order to appraise scientifical y the heavy metal contamination in waste-land of coalmine tailing in Mingshan of Guangdong, the 5 soil samples in wasteland of coalmine tailing were col ected in November 2010 to Marc...ln order to appraise scientifical y the heavy metal contamination in waste-land of coalmine tailing in Mingshan of Guangdong, the 5 soil samples in wasteland of coalmine tailing were col ected in November 2010 to March 2011. The 7 heavy metals content in the contaminated soil was measured by atomic absorption spec-trophotometry. The results showed the pH of the wasteland soil ranged from 2.87 to 6.16, and the soil was relatively infertile. The soil was mainly pol uted by Cd and Mn. The Cd content in wasteland soil ranged from 0.759 mg/kg to 3.109 mg/kg with an average content of 2.052 mg/kg, which was much higher than the standard content. The Mn content ranged from 387.057 to 488.660 mg/kg with an average content of 421.215 mg/kg, which was much higher than the standard content. The Nemerow integrated pol ution indexes showed the sample 1, sample 4 and sample 5 were of heavy pol ution, and sample 2 and sample 3 were of moderate pol ution.展开更多
[ Objective] The study aimed to detect and assess metal ions in tea and soil of tea gardens in Mingshan County. [ Method] Seven metals （ including Pb, Cr, Cu, Ca, Mn, Mg and Zn） in soil and tea samples of tea garden...[ Objective] The study aimed to detect and assess metal ions in tea and soil of tea gardens in Mingshan County. [ Method] Seven metals （ including Pb, Cr, Cu, Ca, Mn, Mg and Zn） in soil and tea samples of tea gardens in Mingshan were determined by atomic absorption spectrometry, and the pollution situation of the soil and tea by Pb, Cr and Cu were evaluated using the single factor pollution index and Nemerow pollu- tion index, finally the accumulation of heavy metals in different soils were analyzed by the enrichment factor. I-Result] There was little difference for the same heavy metals in various soils, but different heavy metals had very significant difference. The enrichment factors of metals needed by tea growing, such as Ca, Mn, Mg and Zn, were higher than heavy metals like Pb and Cr. In addition, soils and tea of the six tea gardens were not polluted by Pb, Cr and Cu, and both single factor pollution index and Nemerow pollution index were below 0.7. [ Condusion] The research could provide scientific references for preventing tea from being polluted by heavy metals.展开更多
针对农村饮水安全中水质不安全的问题,实地采集了名山县81个农村饮水水源地的水样,应用美国科学院国家研究委员会(U.S.National Research Council of National Academy of Science)推荐的健康风险模型计算并分析了本区农村水源地饮水水...针对农村饮水安全中水质不安全的问题,实地采集了名山县81个农村饮水水源地的水样,应用美国科学院国家研究委员会(U.S.National Research Council of National Academy of Science)推荐的健康风险模型计算并分析了本区农村水源地饮水水质的致癌风险(R)和非致癌风险(危害指数,HI);利用ArcGIS的空间分析功能,选择合理的插值方法,对评价结果数据进行了分析,得出研究区水质风险的空间分布图,对该县农村饮水水质进行了致癌物及非致癌物的健康风险单因子和组合因子的综合评价;指出:水源地中主要的致癌物是砷、铬(6+)和铅;非致癌物的健康风险主要来源于砷、氟化物、硝酸盐、铁。研究结论揭示了研究区水源地水质健康风险控制指标,为水源地的治理提供了科学的参考建议。展开更多
基金Supported by Guangdong Science and Technology Plan Project(2010B0318000112012A030700006)~~
文摘ln order to appraise scientifical y the heavy metal contamination in waste-land of coalmine tailing in Mingshan of Guangdong, the 5 soil samples in wasteland of coalmine tailing were col ected in November 2010 to March 2011. The 7 heavy metals content in the contaminated soil was measured by atomic absorption spec-trophotometry. The results showed the pH of the wasteland soil ranged from 2.87 to 6.16, and the soil was relatively infertile. The soil was mainly pol uted by Cd and Mn. The Cd content in wasteland soil ranged from 0.759 mg/kg to 3.109 mg/kg with an average content of 2.052 mg/kg, which was much higher than the standard content. The Mn content ranged from 387.057 to 488.660 mg/kg with an average content of 421.215 mg/kg, which was much higher than the standard content. The Nemerow integrated pol ution indexes showed the sample 1, sample 4 and sample 5 were of heavy pol ution, and sample 2 and sample 3 were of moderate pol ution.
基金Supported by the Plan for Promoting the Quality of Teaching in Sichuan Agricultural University
文摘[ Objective] The study aimed to detect and assess metal ions in tea and soil of tea gardens in Mingshan County. [ Method] Seven metals （ including Pb, Cr, Cu, Ca, Mn, Mg and Zn） in soil and tea samples of tea gardens in Mingshan were determined by atomic absorption spectrometry, and the pollution situation of the soil and tea by Pb, Cr and Cu were evaluated using the single factor pollution index and Nemerow pollu- tion index, finally the accumulation of heavy metals in different soils were analyzed by the enrichment factor. I-Result] There was little difference for the same heavy metals in various soils, but different heavy metals had very significant difference. The enrichment factors of metals needed by tea growing, such as Ca, Mn, Mg and Zn, were higher than heavy metals like Pb and Cr. In addition, soils and tea of the six tea gardens were not polluted by Pb, Cr and Cu, and both single factor pollution index and Nemerow pollution index were below 0.7. [ Condusion] The research could provide scientific references for preventing tea from being polluted by heavy metals.
文摘针对农村饮水安全中水质不安全的问题,实地采集了名山县81个农村饮水水源地的水样,应用美国科学院国家研究委员会(U.S.National Research Council of National Academy of Science)推荐的健康风险模型计算并分析了本区农村水源地饮水水质的致癌风险(R)和非致癌风险(危害指数,HI);利用ArcGIS的空间分析功能,选择合理的插值方法,对评价结果数据进行了分析,得出研究区水质风险的空间分布图,对该县农村饮水水质进行了致癌物及非致癌物的健康风险单因子和组合因子的综合评价;指出:水源地中主要的致癌物是砷、铬(6+)和铅;非致癌物的健康风险主要来源于砷、氟化物、硝酸盐、铁。研究结论揭示了研究区水源地水质健康风险控制指标,为水源地的治理提供了科学的参考建议。
