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Assessment of fluoride uptake performance of raw biomass and activated biochar of Colocasia esculenta stem: Optimization through response surface methodology
Author(s) -
Mukherjee Shraboni,
Halder Gopinath
Publication year - 2016
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12346
Subject(s) - biochar , response surface methodology , colocasia esculenta , sorption , fluoride , central composite design , activated carbon , biomass (ecology) , chemistry , bet theory , adsorption , nuclear chemistry , factorial experiment , pulp and paper industry , pyrolysis , botany , chromatography , agronomy , mathematics , inorganic chemistry , organic chemistry , biology , statistics , engineering
The fluoride uptake performance of raw biomass and its superheated steam activated biochar of Colocasia esculenta stem were investigated in the present study. The sorption process was optimized by response surface methodology (RSM) and a 2 4 full factorial experimental matrix was developed by central composite design (CCD) approach. The influence of four process parameters viz. pH (4.25–10.75), temperature (31.25–63.75°C), adsorbent dosage (8 to 20 g/L) and contact time (62.25–180.75 min) on fluoride uptake was studied in a series of batch sorption experiments. The processed biomass and its activated biochar were characterized and instrumentally analyzed by BET, XRD, SEM and EDAX. The analysis of variance (ANOVA) was studied by using second order regression model equation to study the process parameters. The maximum fluoride removal using raw biomass and activated biochar were 33.00% and 72.82% respectively at similar parametric conditions, i.e., pH 4.25, temperature 63.75°C, adsorbent dosage of 20 g/L and contact time of 180.75 minutes. The present investigation concludes that activated biochar of Colocasia esculenta stem could be a cost‐effective biosorbent for fluoride removal from contaminated water. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1305–1316, 2016