中文摘要：

采用煤炭地下气化实验系统模拟鹤壁烟煤地下气化过程,收集气化后残留半焦（气化残焦）,研究了气化残焦中污染物在地下水中的浸出规律.研究表明,煤炭地下气化残焦浸出液中含有挥发酚等有机污染物及镉（Cd）、铅（Pb）、砷（As）、铬（Cr）、铜（Cu）、镍（Ni）和锌（Zn）等10余种重金属无机污染物.浸出温度和浸出时间是影响煤炭地下气化残留半焦浸出液中污染物质量浓度的重要因素.当浸出温度为45℃,浸出时间为8h时,气化残焦浸出液中挥发酚、总有机碳（TOC）及化学需氧量（COD）的质量浓度分别为0.03mg/L,5.07mg/L,7.48mg/L;Cr,V,Cu,Se,Ni及Zn等重金属离子的质量浓度介于4.0μg/L~73.4μg/L之间.大规模进行煤炭地下气化可能会对地下水造成潜在污染.

英文摘要：

In this paper, the underground gastncation process of Hebi bituminous coal is simulated using UCG experimental system, and the residual char is collected after the UCG. The leaching behavior of pollutants in the residual char in underground water is investigated. The results show that the leaching solution of residual char in UCG contains organic pollutants （e. g. volatile phenol） and inorganic pollutants such as heavy metal ions of Cd, Pb, As, Cr, Cu, Ni, Zn, etc. The leaching temperature and time are the important factors to affect the pollution con-centration in leaching solution of residual char. When the leaching temperature is 45℃ and leaching time is 8 h, the mass concentrations of volatile phenol, total organic carbon （TOC） and chemical oxygen demand （COD） in leaching solution of residual char reach 0.03 mg/L, 5.07 mg/L, 7.48 mg/L, respectively, and the concentration of heavy metal ions is ranging from 4.0 μg/L to 73.4 μg/L. The groundwater may be subjected to pollute through large-scale UCG.