中文摘要：

分析了太原市新沟垃圾填埋场渗滤液的水质特征，并以CODCr作为主要指标探讨了垃圾中有机成分，含水率，以及C、H、O、N等元素含量对渗滤液水质的影响。在此基础上，利用植物检测系统考察了渗滤液对种子萌发和幼苗生长的毒性效应。结果表明，太原市新沟垃圾填埋场渗滤液有机污染物浓度高、水质随季节变化较大，垃圾中有机成分、含水率以及C、H、O、N等元素含量影响渗滤液水质，可能改变其污染特性。高浓度渗滤液可抑制植物萌发和幼苗的正常生长，且表现出对染毒浓度和处理时间的双重依赖性；但低浓度渗滤液对植物萌发和幼苗生长过程没有显著影响，甚至在一定浓度条件下可促进植物的生长发育。

英文摘要：

The physical and chemical characteristics of leachate in Xingou landfill of Taiyuan were analyzed, and the effects of physical composition and chemical element in municipal solid waste （MSW） on the characteristics of leachate were also investigated using Chemical Oxygen Demand （CODCr） as an important index. In addition, the landfill leachate-induced toxicity to seed germination and plant growth was studied using plant-test system. The results indicated that the landfill leachate contained high concentration of organic matter, and its physical and chemical characteristics changed with season and were affected by the composition and chemical element of MSW. CODCr in leachate reached the highest values in summer, a raining season, and the lowest in the winter, a dry season. Hence, raining and penetration of rainwater had great effect on the leachate quality. At the same time, the seasonal change of organic matters and C, H, O, N elements in MSW con- tributed to CODCrin leachate that increased with increasing percentage of organic matters and C, H, O, N elements in MSW. Compared with the negative control, the seed germination and plant growth were restrained with the higher leachate concentration （CODCR 320～1 600 mg·l^-1） treated for 24, 48, 72, and 96 h, respectively, and the inhibition depended on the leachate concentration and the treatment time. However, low concentration of leachate did not affect, even improved, the seed germination and plant growth. 160 mg·l^-1 CODcr, leachate increased the seed germination by 93.7＋-3.5%, 97.3＋2.5% and 100＋0.0% respectively for 24, 48 and 72 h exposure.