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Phytoremediation capability of Azolla pinnata for the removal of malachite green from aqueous solution

Journal of Environment & Biotechnology Research, Vol. 5, No. 1, Pages 10-17, October 2016

Muhammad Raziq Rahimi Kooh, Linda B. L. Lim, Lee Hoon Lim, Muhammad Khairud Dahri

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ABSTRACT

Phytoremediation potential of Azolla pinnata (AP) was investigated for the remediation of malachite green (MG) dye from aqueous solution. This study involved the use of artificial neural network (ANN) as one of the mathematical tools for modelling the experimental data which showed good accuracy (R=0.867). The parameters of this study included the pH, initial dye concentration and plant weight. The optimum pH for phytoremediation of MG was in the range of 4-5, with reasonably high removal efficiencies of 81 - 84%. Reusability studies of spent AP showed good removal efficiency of 75% in the second cycle indicating its usefulness in repeated batch treatment. The growth estimation as indicated by relative frond number (RFN) showed that AP can tolerate a concentration of up to 15 mg/L MG.
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