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

丁振华; 郑宝山; FinkelmamR B; 胡天斗; 周运书

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

1.
中国科学院地球化学研究所环境地球化学国家重点实验室, 贵州贵阳 550002
2.
上海交通大学环境科学与工程学院, 上海 200240
3.
National Center, US Geological Survey, Reston VA, 20192, USA
4.
中国科学院高能物理研究所, 北京 100039
5.
黔西南州卫生防疫站, 贵州兴义 562400

基金项目:

国家自然科学基金项目 40133010

国家自然科学基金项目 49803004

详细信息

作者简介:
丁振华(1966-), 男, 副研究员, 主要从事环境地球化学和矿物学研究. E-mail: dzhua@hotmail.com

中图分类号: P618.11
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出版历程
- 收稿日期: 2002-05-18
- 刊出日期: 2003-03-25

Subsequent Leaching Study of Typical High-As Coal Samples from Southwest Guizhou Province

1.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2.
School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China
3.
National Center, US Geological Survey, Reston VA 20192, USA
4.
BEPC NL Chinese Academy of Sciences, Beijing 100039, China
5.
Sanitation and Antiepidemic Station of Qianxinan Autonomous Prefecture, Xingyi 562400, China

摘要

摘要: 根据以往研究, 选取了2个砷含量差异较大的样品, 利用连续浸取实验, 结合仪器中子活化分析(INAA)、等离子原子吸收光谱(ICP-AES)、等离子质谱(ICP-MS) 测定及X射线吸收精细结构(XAFS) 分析, 经低温灰化(LTA)、扫描电子显微镜(SEM-EDX) 对黔西南高砷煤中砷的赋存状态进行了研究, 发现50 %以上的砷不能被NH₄Ac、HCl、HF和HNO₃等无机试剂提取出来, 结合以往的研究认为砷主要以高价有机砷的形式存在.
- 高砷煤 /
- 黔西南 /
- 赋存状态 /
- 连续浸取
Abstract: Based on a previous research, two typical high-As coal samples were conducted on subsequent leaching. Combining with instrument neutron active analyses (INAA), ICP-MS, ICP-AES, X-ray absorption fine structure (XAFS), low temperature ashing, and scanning electron microscopy with X-ray energy disperse analyzer, this paper discusses the occurrence mode of the arsenic in high-As coals from southwestern Guizhou Province. It is proved that more than 50% arsenic cannnot be leached out by NH ₄Ac, HCl, HF and HNO₃, and that arsenic mainly exists in the organic (Ⅴ) form.
- high-As coal /
- southwestern Guizhou Province /
- mode of occurrence /
- subsequent leaching

HTML全文

图 1 高砷煤中As和Fe的连续淋滤实验结果

下载: 全尺寸图片幻灯片

图 2 样品HZ-9浸取前(HZ-9) 和浸取后(HZ-9L) 的XAFS谱径向分布函数

Fig. 2. Radial structure functions derived from arsenic XAFS spectra of raw coal sample HZ-9 and residue of leached sample HZ-9 (named HZ-9L)

下载: 全尺寸图片幻灯片

表 1 2个高砷煤样的基本特征

Table 1. Properties of two high arsenic coal samples

表 2 样品HZ-9和JL-25的主要矿物组成(半定量)

Table 2. Mineral compositions of sample HZ-9 and sample JL-25

参考文献(14)

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