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- Title
Chromium-Sorbed Maize Stalk Biochar and Its Power Benefited Disposal: An Effective Power Generation Method for Removal of Chromium.
- Authors
Dhanuskodi, Krishnaveni; Pandian, Kannan; Annamalai, Senthilkumar; Subramanian, Ponmani
- Abstract
This study examined Cr(VI) removal efficiency of maize stalk biochar (MSB) from waste water. Equilibrium isotherm results were examined by Langmuir, Freundlich, and Temkin isotherms. The adsorption was found to fit well with the Freundlich and Temkin isotherm models, with R2 values of 0.994 and 0.909, respectively. Temkin indicates the process to be exothermic. The values of the thermodynamic parameter (∆G0) suggested that the adsorption was reasonable and natural. The FT-IR bands were recorded to explore the functional groups available to bind Cr(VI) ions). The SEM–EDS and TEM results show the morphology of the studied adsorbent and C/O ratio present in MSB. XRD and XPS analyses of the adsorbents before and after the reaction indicate that co-precipitation occurred during adsorption. Brunauer, Emmett, and Teller (BET) were recorded for MSB to understand the nature of the surface and pore space present. Thus, MSB has the potential to remove hexavalent chromium ions from wastewater, and removal efficiency is 81%. Microbes present in the soil effectively assisted the desorption of chromium ions from MSB's active sites with concurrent power generation of 359 mV in microbial fuel cells.
- Subjects
CORN; CHROMIUM ions; HEXAVALENT chromium; CHROMIUM; EXCLUSIVE &; concurrent legislative powers; MICROBIAL fuel cells; CHROMIUM removal (Water purification); BIOCHAR
- Publication
Water, Air & Soil Pollution, 2023, Vol 234, Issue 4, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-023-06233-8