Ecotoxicity assessment of hydrophobized soils
Ecotoxicity assessment of hydrophobized soils
复制标题
疏水化土壤的生态毒性评价
DOI：
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发表时间：
2022
影响因子：
2.2
通讯作者：
S. Lourenço
中科院分区：
文献类型：
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作者：
Hongjie Lin;H. Weitz;G. Paton;P. Hallett;B. Hau;S. Lourenço
疏水土是一种用于水力屏障的新型土工材料。对它们的潜在危害和环境风险认识不足是其作为填充材料应用的主要障碍。为了解决这一环境问题，我们对两种疏水化合物（桐油和二甲基二氯硅烷）诱导的两种土壤（福建沙和完全风化花岗岩）进行了渗滤液测试和种子发芽测试。对疏水剂桐油进行了生物指标，即土壤呼吸、酶测定和生物传感器测定。通过渗滤液测试测得的重金属总浓度仍低于指导值，表明在其使用寿命期间渗滤危害可以忽略不计。生物测定显示桐油对土壤微生物的影响极小。结果表明，疏水性土壤作为填充材料对环境的影响可以忽略不计。
Hydrophobized soils are a new geomaterial to be used in hydraulic barriers. Insufficient knowledge of their potential harm and environmental risks is a primary hinderance in their application as a fill material. To address this environmental concern, leachate tests and seed germination tests were conducted on two soils (Fujian sand and completely decomposed granite) induced by two hydrophobizing compounds (Tung oil and dimethyldichlorosilane). Biological indicators, i.e., soil respiration, enzyme assays and biosensor assays, were conducted on the hydrophobizing agent, Tung oil. Total concentrations of heavy metals measured by leachate tests remained below guideline values, indicating that leaching hazard will be negligible during their service life. Biological assays revealed minimal impact on soil microorganisms by Tung oil. The results demonstrate negligible environmental impact of hydrophobized soils as fill materials.