| Autor: |
Naga Babu A; Department of Chemistry, KLEF, Guntur, India., Raja Sree T; Department of Civil Engineering, NRI Institute of Technology & Sciences, Guntur, India., Srinivasa Reddy D; Department of Petroleum Engineering and Earth Sciences, University of Petroleum and Energy Studies, Dehradun, India., Suresh Kumar G; Petroleum Engineering Programme, Department of Ocean Engineering, IIT Madras, Chennai, India., Krishna Mohan GV; Department of Chemistry, KLEF, Guntur, India. |
| Jazyk: |
angličtina |
| Zdroj: |
Environmental technology [Environ Technol] 2021 May; Vol. 42 (12), pp. 1810-1825. Date of Electronic Publication: 2019 Nov 03. |
| DOI: |
10.1080/09593330.2019.1681520 |
| Abstrakt: |
Arsenic present in water bodies causes devastating effects on aquatic organisms and indirectly poses a hazardous threat to human existence. There is an urgent need to develop potential and convincing technologies to troubleshoot this problem. In the present study, an adsorbent has been prepared using the waste red mud from hazardous aluminium industry and doping it with calcium-alginate beads (ARMCB) for the effective removal of As(III) from wastewater. The concentration of As(III) was reduced from 0.101 mg/L to 0.008 mg/L after adsorption which effectively met the economic and environmental conditions imposed by WHO (>0.01 mg/L). Further, the statistical Response Surface Methodology (RSM) is adopted to analyze the combined effects of four operational parameters namely: pH, sorbent dosage, contact time and initial concentration on the adsorption of As(III) from the synthetic contaminated water samples. A high correlation coefficient (R2) value of 0.9672 projected by ANOVA confirmed the satisfactory regression of the developed model. The maximum adsorption capacity is found to be 1.807 mg/g at optimum operating conditions. The surface characterization of the adsorbent before and after adsorption by SEM, EDX, XRD, and FTIR confirms the potentiality of the adsorbent towards As(III) ions. Thermodynamic, adsorption isotherms and kinetic analysis respectively projected the endothermic Langmuir model adsorption of As(III) and the pseudo-second-order rate kinetics of the sorption mechanism. The current study aids the implementation of the developed robust technique for the successful removal of As(III) from industrial and domestic polluted water samples. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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