Althoff K, Mundt M, Eisentraeger A, Dott W, Hollender J
Institute of Hygiene and Environmental Medicine, RWTH Aachen, Pauwelsstrasse 30, D-52074 Aachen, Germany.
Water Res. 2001 Mar;35(3):720-8. doi: 10.1016/s0043-1354(00)00315-8.
Groundwater samples from six wells of a former gas plant site were characterised using chemical, microbial and ecotoxicological methods. Degradation studies were performed in batch-culture under aerobic conditions with the groundwater samples containing their autochthonous microflora and original contaminant mixture. The highest O2-consumption (3 mmol 100 ml-1), combined with BTEX (8.3 mg l-1) and naphthalene (171.3 mg l-1) degradation, as well as formation of organic acids was found after N- and P-supplementation with the highest contaminated groundwater sample. The other highly polluted groundwater sample showed no activity obviously because of the toxicity of some compounds. The major part of the PAHs and BTEX was eliminated in the assays with the low contaminated groundwater samples. The results indicate that the microbial degradation capacity and thereby the natural attenuation capacity in each groundwater differ and cannot be assessed simply by chemical, microbial and toxicological data. Additionally activity tests with authentic groundwater samples with and without nutrient supplementation are recommended.
利用化学、微生物和生态毒理学方法对某 former 天然气厂场地六口井的地下水样本进行了特征分析。在有氧条件下，对含有本地微生物群落和原始污染物混合物的地下水样本进行分批培养，开展降解研究。对污染最严重的地下水样本补充氮和磷后，发现其耗氧量最高（3 mmol 100 ml-1），同时伴有苯系物（8.3 mg l-1）和萘（171.3 mg l-1）的降解以及有机酸的形成。另一个高污染地下水样本由于某些化合物的毒性，未表现出明显活性。在对低污染地下水样本的分析中，多环芳烃和苯系物的大部分被去除。结果表明，各地下水中的微生物降解能力以及自然衰减能力各不相同，不能简单地通过化学、微生物和毒理学数据进行评估。此外，建议对添加和不添加营养物质的真实地下水样本进行活性测试。
