Response surface methodology optimization for sorption of malachite green dye on sugarcane bagasse biochar and evaluating the residual dye for phyto and cytogenotoxicity.

Autor: Vyavahare GD; Department of Biotechnology, Shivaji University, Vidyanagar, Kolhapur, Maharashtra 416004, India., Gurav RG; Department of Biotechnology, Shivaji University, Vidyanagar, Kolhapur, Maharashtra 416004, India., Jadhav PP; School of Bioscience and Technology, Vellore Institute of Technology, Tamil Nadu 632014, India., Patil RR; Department of Biotechnology, Shivaji University, Vidyanagar, Kolhapur, Maharashtra 416004, India; Department of Biochemistry, Shivaji University, Vidyanagar, Kolhapur, Maharashtra 416004, India., Aware CB; Department of Biotechnology, Shivaji University, Vidyanagar, Kolhapur, Maharashtra 416004, India., Jadhav JP; Department of Biotechnology, Shivaji University, Vidyanagar, Kolhapur, Maharashtra 416004, India; Department of Biochemistry, Shivaji University, Vidyanagar, Kolhapur, Maharashtra 416004, India. Electronic address: jpjbiochem@gmail.com.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2018 Mar; Vol. 194, pp. 306-315. Date of Electronic Publication: 2017 Dec 01.
DOI: 10.1016/j.chemosphere.2017.11.180
Abstrakt: In the present study, sorption and detoxification of malachite green (MG) dye was executed using biochar resulting after pyrolysis of agro-industrial waste at 400, 600 and 800 °C. Maximum sorption of MG dye (3000 mg/L) was observed on the sugarcane bagasse biochar (SCB) prepared at 800 °C. The interactive effects of different factors like dye concentration, time, pH and temperature on sorption of MG dye were investigated using response surface methodology (RSM). Optimum MG dye concentration, contact time, temperature and pH predicted through Box-Behnken based RSM model were 3000 mg/L MG dye, 51.89 min, 60 °C and 7.5, respectively. ANOVA analysis displayed the non-significant lack of fit value (0.4566), whereas, the predicted correlation coefficient values (R 2 0.8494) were reasonably in agreement with the adjusted value (R 2 0.9363) demonstrating highly significant model for MG dye sorption. The applicability of this model was also checked through F- test (30.39) with lower probability (0.0001) value. Furthermore, the characterization of SCB was performed using fourier transform infra-red spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), Brunauer-Emmett-Teller surfaces (BET), total organic carbon (TOC) and atomic absorption spectroscopy (AAS). Phyto-toxicity and cytogenotoxicity studies showed successful removal of MG dye using SCB. In addition, the batch sorption studies for reutilization of SCB revealed that the SCB was effective in removal of MG for five repeated cycles. This technology would be effective for treating the toxic textile effluent released from the textile industries.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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