利用无患子皂苷修复受污染土壤中重金属的效果评估：以台湾海埔地区为例。
Evaluation of remediation process with soapberry derived saponin for removal of heavy metals from contaminated soils in Hai-Pu, Taiwan.
机构信息
Department of Earth and Environmental Sciences, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi 62102, Taiwan.
出版信息
J Environ Sci (China). 2013 Jun 1;25(6):1180-5. doi: 10.1016/s1001-0742(12)60162-4.
The use of a biodegradable natural plant-based surfactant extracted from soapberry is proposed for the remediation of Ni, Cr and Mn from industrial soil site in Hai-Pu, Taiwan. Batch experiments were performed under variation of fundamental factors (saponin concentration, pH, and incubation time) for metal remediation. Removal of Ni and Mn were increased with increasing saponin concentration (0.015-0.150 g/L), whereas the removal of Cr was increased upto 0.075 g/L saponin. The Ni, Cr and Mn were removed significantly (p < or = 0.05) at near to the neutral and slightly acidic (pH 5 to 8) conditions. Removal efficiency of Ni (99%) from the soil was found to be greater than that of Cr (73%) or Mn (25%) in the presence of saponin at a concentration of 0.150 g/L at pH 5. The removal percentage increased with incubation time where the removal of Ni was faster than that of Cr and Mn. The result indicates the feasibility of eco-friendly removal of heavy metal (Ni, Cr and Mn) from industrial soil by soil washing process in presence of plant derived saponin.
拟从台湾海埔地区的工业土壤中提取一种可生物降解的天然植物表面活性剂（皂角苷），用于修复镍、铬和锰。通过改变基本因素（皂苷浓度、pH 值和孵育时间）进行了批量实验，以进行金属修复。随着皂苷浓度（0.015-0.150 g/L）的增加，镍和锰的去除率增加，而铬的去除率增加到 0.075 g/L 皂苷。在接近中性和略酸性（pH 值 5 至 8）条件下，镍、铬和锰的去除率显著增加（p < or = 0.05）。在 pH 值为 5 且皂苷浓度为 0.150 g/L 的条件下，从土壤中去除镍（99%）的效率高于去除铬（73%）或锰（25%）。随着孵育时间的增加，去除率增加，镍的去除速度快于铬和锰。结果表明，在植物衍生皂苷存在的情况下，通过土壤淋洗工艺从工业土壤中去除重金属（镍、铬和锰）是可行的。
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