Remediation of Cationic Dye from Waste Water using Low Cost Biosorbent :Preparation, Characterization, Adsorption Study
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Authors
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Manju
Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University, Hisar- 125004, Haryana, India
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Sachin Kumari
Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University, Hisar- 125004, Haryana, India
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Bhagya Shree
Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University, Hisar- 125004, Haryana, India
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Sushila Singh
Department of Chemistry, Chaudhary Charan Singh Haryana Agricultural University, Hisar- 125004, Haryana, India
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Ankush Dhanda
Department of Soil Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125004, Haryana, India
Keywords:
Almond shell, adsorption, cationic dye, isotherm studiesAbstract
Human and aquatic health is frequently at risk due to dye pollution in aquatic environments. In order to remediate water contaminated with cationic dye namely brilliant green (BG) dye, a chemically modified almond shell adsorbent was developed in the present study. The physico-chemical characteristics of modified almond shell (MAS) were investigated using a variety of characterization techniques, including pHpzc, FTIR, FE-SEM, and EDS. Studies have been conducted on the impacts of different adsorption parameters, including the pH, dye concentrations, adsorbent dose, contact time and temperature. The optimized conditions were pH−8, 0.8 g/L of adsorbent dose, 120 minutes of contact time and temperature 50⁰C. The BG uptake by modified almond shell was explained by the monolayer adsorption onto energetically equivalent sorption sites. The Langmuir model yielded a maximal adsorptive capacity of 121.73 mg BG per g MAS. The kinetic models also showed that the rate depends on the adsorbent's adsorptive capacity. The pseudo-second-order model fits BG adsorption well, with R2 > 0.99. Thermodynamic studies indicated that adsorption is feasible, spontaneous, and endothermic. This work suggests that MAS warrants further investigation as a potential adsorbent for removing BG dye.
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