Ultilization of mango leaves (Mangifera Indica sp.) as low-cost adsorbent for the removal of copper(ii) ions from aqueous solution / Nur Fatimatul Syahida Rosli

Contamination of environment by heavy metal especially in aquatic ecosystems is a serious problem due to increasing of the industrial activity. One of the alternative ways with an economical way is biosorption as it is used the various natural resources and industrial waste. Besides that, to improve the biosorption process and its effectiveness, the biosorbent is modified by chemically treated. Therefore, the efficiencies of treated
mango leaves powder {Mangifera Indica sp.) as a low cost adsorbent for the removal of Cu(II) ions from aqueous solution which will assumed as the original wastewater containing Cu(II) ions was investigated in this study. The influences of pH, biosorbent dosage, contact time and initial concentration of Cu(ll) ions were studied in batch experiments at room temperature and the percentage removal with uptake capacity were determined by using Atomic Absorption Spectrometry (AAS). The mango leaves used in this study were characterised by FTIR spectroscopy and it was found that O-H, C-H. C=C and C-0 stretching were present. From the studies, it showed the optimum pH of initial solution was pH 5 with 0.8002mg/g and 80.91% of metal uptake capacity and percentage removal respectively. Optimum amount of biosorbent dosages was 0.5g with 0.9158mg/g of metal uptake capacity and 88.92% of percentage removal while the optimum contact time in biosorption was 120 minutes with 0.9197mg/g and 88.67% of percentage removal. The initial concentration of Cu(II) ions was found optimum to be at 50 mg/L with 4.7688mg/g of metal uptake and 91.93% of percentage removal. For the biosorption isotherm study, the biosorption data was well fitted with Freundlich lostherm model. The value of n = 0.6545 which is not in the range of (1< n <10) indicates that adsorption was unfavorable. From all the result that have been obtained, it can be concluded that adsorbent from treated mango leaves powder can be utilized for the treatment of Cu(II) ions in aqueous solution and have the potential to be applied as alternative low-cost biosorbent in the remediation of heavy metal contamination in
wastewater.