Date pits activated carbon for divalent lead ions removal
| Autor: | Velu Sagadevan, Bharath Govindan, Pau Loke Show, Rambabu Krishnamoorthy, Fawzi Banat, Monash Purushothaman |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Exothermic reaction Inorganic chemistry Bioengineering 01 natural sciences Applied Microbiology and Biotechnology Water Purification Divalent Ion Crystal 03 medical and health sciences symbols.namesake chemistry.chemical_compound Adsorption 010608 biotechnology medicine Humans Heavy Ions Phosphoric Acids Phosphoric acid Ions chemistry.chemical_classification Phoeniceae Temperature Langmuir adsorption model Hydrogen-Ion Concentration Carbon Kinetics 030104 developmental biology Absorption Physicochemical Lead chemistry Charcoal Seeds symbols Thermodynamics Powders Water Pollutants Chemical Biotechnology Activated carbon medicine.drug |
| Zdroj: | Journal of Bioscience and Bioengineering. 128:88-97 |
| ISSN: | 1389-1723 |
| DOI: | 10.1016/j.jbiosc.2018.12.011 |
| Popis: | Phosphoric acid impregnated activated carbon from date pits (DPAC) was prepared through single step activation. Prepared DPAC was studied for its structural, elemental, chemical, surface and crystal nature. Adsorption ability of the DPAC was assessed through divalent lead ions separation studies. Effect of adsorbent dosage, contact time, pH, operating temperature and initial feed concentration on lead removal by DPAC was studied. Maximum Pb(II) adsorption capacity of 101.35 mg/g was attained for a contact time of 30 min and pH of 6 at 30°C. Increase in initial feed concentration enhanced the adsorption ability of DPAC and the rise in adsorbent dosage resulted in improved Pb(II) removal efficiency. Thermodynamic studies revealed that the lead adsorption on DPAC was exothermic and instantaneous in nature. Kinetic and equilibrium studies confirmed the suitability of pseudo-second order and Langmuir isotherm for divalent lead ions binding on DPAC. Reusability studies showed that HCl was the effective regeneration medium and the DPAC could be reused for a maximum of 4 times with slight reduction in Pb(II) removal efficiency (10%). Results indicated the promising use of date pits biomass as a low cost and efficient starting material to prepare activated carbon for divalent lead ions removal. |
| Databáze: | OpenAIRE |
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