Waste Musa acuminata residue as a potential biosorbent for the removal of hexavalent chromium from synthetic wastewater
- PDF / 2,613,461 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 18 Downloads / 165 Views
ORIGINAL ARTICLE
Waste Musa acuminata residue as a potential biosorbent for the removal of hexavalent chromium from synthetic wastewater A. Hariharan 1 & V. Harini 1 & Sai Sandhya 1 & S. Rangabhashiyam 2 Received: 16 September 2020 / Revised: 16 November 2020 / Accepted: 19 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The present study is undertaken to evaluate the feasibility use of Musa acuminata bract as (MAB) biosorbent towards the removal of hexavalent chromium from synthetic wastewater. Chromium is a potential pollutant to all forms of life and therefore efficient way of treatment is necessary even towards lower chromium concentration removal. The objectives of the present research include optimizing parameters influencing biosorption of hexavalent chromium, pH, dosage of the MAB, influent Cr(VI) concentration, and time. The MAB was characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) analysis, to examine the surface functional group and structural assessments of the MAB. Optimum pH for the effective biosorption was found to be 2.0, and the biosorption capacity was found to be 36.84 mg/g with 87.55% of Cr(VI) removal. Further experiments were carried out at the optimized pH for other parameters influence on the Cr(VI) biosorption. Langmuir isotherm shows better fit than the rest of the models because of the higher R2 value. The data were analyzed using pseudo-first-order, pseudo-second-order, intra-particle diffusion, and Elovich models. Higher degree of coefficient of determination was obtained for the pseudo-second-order kinetic model. The results of the present study suggested that MAB could be used beneficially in treating industrial effluents containing hexavalent chromium through further research study of column biosorption. Keywords Biosorption . Hexavalent chromium . Characterizations
1 Introduction Water pollution is a major environmental problem the world is facing today mainly due to modernizations. Removal of toxic metal ions discharged from the ever-increasing number of industries is a major environmental concern [4, 17, 55, 60]. The presence of metals even in trace levels is a health hazard to majority of the living systems [38]. Chromium has three oxidation states namely Cr(0), Cr(III), and Cr(VI). In solutions, at different pH values, they exist as Cr2O72−, HCrO4−, and CrO42− ions. Out of this, Cr(VI) is identified as potential
* S. Rangabhashiyam [email protected] 1
Department of Chemical Engineering, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, India
2
Department of Biotechnology, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, India
carcinogen; they can cause respiratory issues such as bronchitis and lung cancer. It is almost 500 times more harmful than Cr(III), which is in fact essential for the human body [21, 25]. Higher oxidation state of +6 is highly stronger and stable than the +3 oxidation
Data Loading...
