The Role of Kiwi in Eliminatron of Pollution and Factors Affacting it (Case Study in Tonekabon)

The Actinidia carambola was researched for its biosorption performance in the sequestering of Pb(II), Cu(II) and Ni(II) from contaminated water with heavy metals. The effects of three parameters (pH, contact time of biomass and metal solution and initial metal ions concentration) on the biosorption were investigated. one-at-a-time research were shown the best level of mentioned parameters (for three metals). The highest capacity of heavy metals uptake was reached in the beginning minutes of contact time (30, 30 and 30min for Pb(II), Cu(II) and Ni(II), respectively) and at pH=3 for all metals. Increasing the initial metal concentration in lower values caused a steep growth in biosorption, which was not observed in higher concentrations. The general affinity sequence of Actinidia carambola for metals uptake was as Cu(II) > Pb(II) >Ni(II). Also, isotherm and kinetic studies were carried out by Langmuir and Freundlich adsorption isotherm models and Lagergren pseudo-first order and second order rate equations, respectively. Langmuir adsorption isotherm model showed a better performance in description of adsorption behavior than Freundlich model. The second order kinetic model provides a perfect description of biosorption with r2≈1, for Pb(II) and Cu(II), and r2=0.998 for Ni(II).