贵州省某村煤中砷含量及赋存状态
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摘要
基于对贵州兴仁某村煤中砷的含量及赋存状态的研究,得出研究区砷含量分布范围在17.83mg/kg~140.64mg/kg,平均值为93.31mg/kg,远高于中国(4.09mg/kg)和世界(5mg/kg)煤砷含量.其赋存状态复杂多样,煤砷各形态含量比例分布为:残渣态(56.74%)>铁锰氧化物结合态(20.74%)>硫化物结合态(15.20%)>有机结合态(5.07%)>碳酸盐结合态(1.73%)>水溶态和可交换态(0.52%).煤中砷主要以残渣态形式存在,铁锰氧化物结合态砷含量也较高.其中一个煤样砷含量相对于其他样品较小,有机砷结合态所占比例相对较大,结合前人研究推断:此次研究的煤样多以大分子有机砷结合态存在,但不易提取,导致残渣态砷含量较高.
Investigation of arsenic content and occurrence in coal of Guizhou coal showed that arsenic content is large,and its arithmetic average content reaches 93.31 mg/kg,which is much larger than that in coal of other coal fields in China (4.09 mg/kg).The sequence of the average levels of arsenic occurrence in coal is:residual arsenic(56.74%)>Fe-Mn oxide arsenic (20.74%)>sulfide arsenic (15.20%)>organic arsenic (5.07%)>carbonate arsenic (1.73%)>soluble and exchangeable arsenic.Arsenic in coal is mainly residual arsenic,and Fe-Mn oxide arsenic is the second highest.There is a coal sample exception,whose content is lower than other samples relatively,and organ arsenic is the largest in all modes.With previous studies,the result can be inferred that the coal is mainly organic arsenic,but not easy to extract.
Investigation of arsenic content and occurrence in coal of Guizhou coal showed that arsenic content is large,and its arithmetic average content reaches 93.31 mg/kg,which is much larger than that in coal of other coal fields in China (4.09 mg/kg).The sequence of the average levels of arsenic occurrence in coal is:residual arsenic(56.74%)>Fe-Mn oxide arsenic (20.74%)>sulfide arsenic (15.20%)>organic arsenic (5.07%)>carbonate arsenic (1.73%)>soluble and exchangeable arsenic.Arsenic in coal is mainly residual arsenic,and Fe-Mn oxide arsenic is the second highest.There is a coal sample exception,whose content is lower than other samples relatively,and organ arsenic is the largest in all modes.With previous studies,the result can be inferred that the coal is mainly organic arsenic,but not easy to extract.
引文
[1]Ding Zhenhua,Zheng Baoshan,Zhuang Minet al.Mode of Occurrence of Arsenic in High-As Coals from Endemic Arsenosis Areas in Southwestern Guizhou Province,China[J].Journal of Coal Science&Engineering,2007,13(2):194-198.
[2]王华东,郝春曦,王建.环境中的砷———行为、影响、控制[M].北京:中国环境科学出版社,1992.
[3]李大华,陈坤,邓涛等.中国西南地区煤中砷的分布及富集因素探讨[J].中国矿业大学学报,2002,31(4):419-422.
[4]赵峰华,任德贻,彭苏萍等.煤中砷的赋存状态[J].地球科学进展,2003,18(2):214-220.
[5]丁振华,郑宝山,庄敏等.贵州中北部燃煤型砷中毒地区煤中砷的赋存状态研究[J].矿物学报,2009,29(1).
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[7]谢宏.高砷煤地质特征及成因研究[D].贵阳:贵州大学,2005.
[8]李大华,陈坤,邓涛等.中国西南地区煤中砷的分布及富集因素探讨[J].中国矿业大学学报,2002,31(4):419-422.
[9]陈桂珍,郭亚静.长城窝堡井田煤中砷的分布与评价[J].宿州学院学报,2009,24(2):121-122.
[10]Coal Quality Database:Version2.0,U.S[R].Geologial Survey Open-file Report97-134CD-ROM.
[11]王明仕,杨娜娜,朱建明等.中国燃煤砷排放量估算[J].煤炭转化,2008,31(2):1-7.
[12]王明仕,闫国龙,赵丽等.不同砷含量下煤中砷与硫的脱洗研究[J].煤炭转化,2008,31(1):79-81.
[13]丁振华,郑宝山,Finkel mam R B等.典型高砷煤样品的连续浸取实验研究———兼论黔西南高砷煤中砷的赋存状态[J].地球科学———中国地质大学学报,2003,28(2):209-213.
[2]王华东,郝春曦,王建.环境中的砷———行为、影响、控制[M].北京:中国环境科学出版社,1992.
[3]李大华,陈坤,邓涛等.中国西南地区煤中砷的分布及富集因素探讨[J].中国矿业大学学报,2002,31(4):419-422.
[4]赵峰华,任德贻,彭苏萍等.煤中砷的赋存状态[J].地球科学进展,2003,18(2):214-220.
[5]丁振华,郑宝山,庄敏等.贵州中北部燃煤型砷中毒地区煤中砷的赋存状态研究[J].矿物学报,2009,29(1).
[6]王砚耕.南盘江地区浅层地壳结构与金矿分布模式[J].贵州地质,1995,12(2):93-97.
[7]谢宏.高砷煤地质特征及成因研究[D].贵阳:贵州大学,2005.
[8]李大华,陈坤,邓涛等.中国西南地区煤中砷的分布及富集因素探讨[J].中国矿业大学学报,2002,31(4):419-422.
[9]陈桂珍,郭亚静.长城窝堡井田煤中砷的分布与评价[J].宿州学院学报,2009,24(2):121-122.
[10]Coal Quality Database:Version2.0,U.S[R].Geologial Survey Open-file Report97-134CD-ROM.
[11]王明仕,杨娜娜,朱建明等.中国燃煤砷排放量估算[J].煤炭转化,2008,31(2):1-7.
[12]王明仕,闫国龙,赵丽等.不同砷含量下煤中砷与硫的脱洗研究[J].煤炭转化,2008,31(1):79-81.
[13]丁振华,郑宝山,Finkel mam R B等.典型高砷煤样品的连续浸取实验研究———兼论黔西南高砷煤中砷的赋存状态[J].地球科学———中国地质大学学报,2003,28(2):209-213.
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