title: Evaluation of remediation process with soapberry derived saponin for removal of heavy metals from contaminated soils in Hai-Pu, Taiwan.
abstract: 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.
authors.affiliation: Department of Earth and Environmental Sciences, National Chung Cheng University, 168, University Rd., Min-Hsiung, Chia-Yi 62102, Taiwan.
authors.forename: Jyoti Prakash
authors.initials: JP
authors.lastname: Maity
authors.forename: Yuh Ming
authors.initials: YM
authors.lastname: Huang
authors.forename: Cheng-Wei
authors.initials: CW
authors.lastname: Fan
authors.forename: Chien-Cheng
authors.initials: CC
authors.lastname: Chen
authors.forename: Chun-Yi
authors.initials: CY
authors.lastname: Li
authors.forename: Chun-Mei
authors.initials: CM
authors.lastname: Hsu
authors.forename: Young-Fo
authors.initials: YF
authors.lastname: Chang
authors.forename: Ching-I
authors.initials: CI
authors.lastname: Wu
authors.forename: Chen-Yen
authors.initials: CY
authors.lastname: Chen
authors.forename: Jiin-Shuh
authors.initials: JS
authors.lastname: Jean
mesh_terms: D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000737:chemistry*; D032127:Sapindus / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D013624:Taiwan
chemical_list: D019216:Metals, Heavy; D012503:Saponins; D012989:Soil Pollutants