| Autor: |
Samal PP; Environment Protection Laboratory, Department of Chemistry, Central University of Jharkhand, Ranchi, India., Kumari J; Environment Protection Laboratory, Department of Chemistry, Central University of Jharkhand, Ranchi, India., Qaiyum MA; Environment Protection Laboratory, Department of Chemistry, Central University of Jharkhand, Ranchi, India., Mohanta J; Environment Protection Laboratory, Department of Chemistry, Central University of Jharkhand, Ranchi, India., Kumari R; Environment Protection Laboratory, Department of Chemistry, Central University of Jharkhand, Ranchi, India., Dutta S; Environment Protection Laboratory, Department of Chemistry, Central University of Jharkhand, Ranchi, India., Dey B; Department of Chemistry, The Graduate School College for Women Jamshedpur, Jamshedpur, India., Dey S; Environment Protection Laboratory, Department of Chemistry, Central University of Jharkhand, Ranchi, India. |
| Abstrakt: |
Herein we demonstrate an enhanced performance of acid-assisted thiosulfate-impregnated spent/waste tea leaves (TWTL) for the removal of malachite green (MG) from water by batch mode. The material was characterized by pH ZPC , FTIR, powder XRD, SEM, and proximate analysis. FTIR suggests the presence of polyphenolic moieties whereas a lignocellulosic peak was observed in powder XRD. SEM image shows a grafted surface texture with intermittent blocks, which upon dye uptake becomes somewhat condensed. Under optimized conditions, the highest removal efficiency of 126.8 mg/g was achieved at pH 7. A fast adsorption process was noticed with >97% removal within the first 10 min. Adsorption follows pseudo-second-order kinetics ( R 2 = 0.999) and the Langmuir model ( R 2 = 0.999). The material can be regenerated by dilute hydrochloric acid and can be reused for up to four cycles. Treatment of industrial effluent was successful in up to 47.56%. Our results highlight the potential of thiosulfate-treated spent tea leaves as a choice for the efficient removal of malachite green from water. |
