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Heavy metal contamination of soils possess a serious health threat and has become one of the major constraining factors in remediating a wide range of contaminated sites. Soil contains various components such as clay, kaolin, feldspar, quartz, etc. Soil composition (type of soil), soil pH, cation exchange capacity (CEC), particle size, time and type of contamination, geological layout, etc. all play a major role in establishing the effectivenes of biosurfactant. In this study, the effects of saponin concentration,...

In this study, removal zinc from aqueous solution was studied using smectite-bearing soil. The effects of initial Zn(II) concentration, pH, adsorbent dosage, and contact time were investigated. When the initial concentration of Zn(II) was incresed from 0.7 to 3.77 mM, the Zn(II) removal efficiency decreased from 100\% to 90.7\%. To determine the effect of pH on the adsorption efficiency of Zn(II), pH was varied between 3.0 and 7.0. The sorption efficiency of Zn(II) onto soil seems to be independent of pH with in s...