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首页> 外文期刊>Journal of Environmental Management >Sorption studies of mixed chromium and chlorinated ethenes at the field and laboratory scales
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Sorption studies of mixed chromium and chlorinated ethenes at the field and laboratory scales

机译：野外和实验室规模的混合铬和氯化乙烯吸附研究

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The sorption and desorption behavior of hexavalent chromium and chlorinated ethenes in a sandy ground water aquifer with a low reduction capacity was evaluated by performing a variety of analyses and experiments at the laboratory (batch and column studies) and field (in situ injection-withdrawal experiment) scales. The partitioning coefficients determined from the field and laboratory experiments are generally similar. Both sets of experiments yielded relatively low partition coefficients for chromium and chlorinated ethenes. The column studies and injection-withdrawal experiment indicate that chromium has the potential to leach from aquifer sediments and act as a secondary source of contamination. However, the magnitude of the secondary source effect is not significant due to low concentrations of leachable contamination. The chromium sorption isotherm data were also simulated using the triple layer surface complexation model (TLM). The isotherm data were modeled using the TLM, illustrating the applicability of geochemical modeling for sorption of chromium to these sediments under variable pE-pH conditions.
机译：通过在实验室（分批和色谱柱研究）和现场（原位注水-抽提实验）进行各种分析和实验，评估了还原能力低的砂质地下水含水层中六价铬和氯化乙烯的吸附和解吸行为。 ）秤。从现场和实验室实验确定的分配系数通常相似。两组实验都产生了相对较低的铬和氯化乙烯分配系数。色谱柱研究和注入抽提实验表明，铬具有从含水层沉积物中浸出的潜力，并作为次要污染源。但是，由于低浓度的可浸出污染物，次级污染源影响的程度并不明显。还使用三层表面络合模型（TLM）模拟了铬吸附等温线数据。等温线数据使用TLM建模，说明了在可变pE-pH条件下地球化学建模在这些沉积物上吸附铬的适用性。

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