Author(s): Siti Nurzahidah Ramli, Keng Yuen Foo, Nor Azazi Zakaria
Linked Author(s): Siti Nurzahidah Ramli
Keywords: Adsorption, dye, functionalization, polymeric adsorbent, textile contaminant
Abstract: To date, water pollution is a global top agenda that requires on-going evaluation and revision of water resource management at all levels. It occurs when pollutants are directly or indirectly discharged into the water bodies without the implementation of good management and treatment strategy. It has been reported that approximately 5 to 10 billion tons of industrial wastes are generated annually, many of which are pumped untreated into rivers, oceans or groundwater, with an estimated production of 1, 500 km3/year, six times higher than the river water volume. These effluents could be a major threat to the natural environmental and induce a potentially carcinogenic, mutagenic and allergenic impact to the aquatic environment and ecosystems. This has prompted an urgent need for the exploration of a low cost, reliable, and simple treatment technique. Among all, adsorption process has been identified to be a feasible treatment method for the pretreatment of water pollutants. In this study, a new functionalized polymeric adsorbent was prepared, and its potential for the adsorptive treatment of textile effluent was evaluated using methylene blue (MB) as the model adsorbate. The prepared adsorbent was characterized by Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and nitrogen adsorption-desorption curve. The effects of modification agents, initial concentrations, contact time and solution pH on the adsorption performance were examined. Glutamic acid modification has shown the best adsorption capacity, with the monolayer adsorption capacity for MB of 205. 99 mg/g. Equilibrium data were best confronted to the pseudo-second-order kinetic equation, while the adsorptive process was satisfactory described by the Langmuir isotherm model. Regeneration studies showed that the adsorptive uptake remain at 180. 37 mg/g even after five adsorption regeneration cycles. The findings revealed the great potential of the functionalized adsorbent for the successive treatment of contaminated textile water
Year: 2017