Adsorptive Removal of Arsenic(III) from Contaminated Water Using Rice Husk, Tea Waste and Sugarcane Bagasse Bio-adsorbents

Low-cost bio-adsorbents such as sugarcane bagasse (SB), rice husk (RH), and tea waste (TW) were explored for the adsorptive removal of arsenite (As 3+ ). The adsorbents were treated with HCl and utilized for adsorption study under batch mode. The adsorbents were characterized using FTIR, zeta potent...

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Published in:Water, air, and soil pollution air, and soil pollution, 2023-05, Vol.234 (5), p.308-308, Article 308
Main Authors: Singh, Jyoti, Kumar, Abhishek, Pathak, Ayush, Palai, Tapas
Format: Article
Language:English
Subjects:
Activated carbon
Activated charcoal
Adsorbents
Adsorption
Adsorptivity
air
ambient temperature
Arsenic
Arsenic compounds
Arsenic ions
Arsenite
arsenites
Atmospheric Protection/Air Quality Control/Air Pollution
Bagasse
Charcoal
Climate Change/Climate Change Impacts
Contamination
Earth and Environmental Science
Environment
Environmental monitoring
Hydrogeology
Isotherms
Kinetics
Pollutant removal
Removal
Rice
rice hulls
Room temperature
soil
Soil Science & Conservation
sorption isotherms
Sugarcane
sugarcane bagasse
tea
wastes
water
Water pollution
Water Quality/Water Pollution
Zeta potential
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Summary:Low-cost bio-adsorbents such as sugarcane bagasse (SB), rice husk (RH), and tea waste (TW) were explored for the adsorptive removal of arsenite (As 3+ ). The adsorbents were treated with HCl and utilized for adsorption study under batch mode. The adsorbents were characterized using FTIR, zeta potential, and SEM. Batch studies were performed with raw and HCl-treated adsorbents to observe the effects of various operating parameters. HCl-treated adsorbents (HCl-treated SB (HSB), RH (HRH), and TW (HTW)) showed better removal efficiencies. The adsorption capacities of HSB and HRH at 50 ppm As 3+ concentration and 0.1 g-adsorbent doses were found to be 28.0 and 28.25 mg/g, respectively, which is very close to commercially available HCl-treated activated charcoal (HAC) (30.36 mg/g). A maximum removal efficiency of 99.5% was achieved using HSB at room temperature with 50 ppm As 3+ concentration, pH 7.0, and 2.0 g-adsorbent doses. Finally, the kinetics study revealed a better fitting of a pseudo-second-order model with the experimental data. The HRH and HSB showed excellent agreement with Langmuir isotherm, whereas HTW and HAC with Freundlich isotherm.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-023-06308-6