Journal article
Biosorption and health risk assessment of arsenic contaminated water through cotton stalk biochar
Surfaces and interfaces, Vol.29, 101806
04/2022
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Abstract
Arsenic (As) contamination in water has become a worldwide concern for public and environmental health owning to its non-degradable and toxic nature. Recently, elevated concentrations of As have been documented in groundwater, which needs remediation through low-cost technology. Cotton stalks derived biochar (CSB) is a new adsorbent material that may have the potential to remove As(III) from an aqueous solution. Therefore, in this study, the potential of CSB for sorption and removal of As(III) was evaluated at optimized operational conditions viz. contact time, concentrations of CSB, and As(III). Moreover, the health risk assessment of treated water was also determined to monitor the effectiveness of CSB-treatment for various As-concentrations. The CSB was characterized for Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and point of zero charges (PZC) to explore surface moieties that facilitate As(III) sorption on the CSB. Results revealed that maximum sorption capacity (q) of As(III) was 89.90 mu g g(-1) (at 1 g CSB L-1, pH 6, contact time 2 h, As concentration 200 mu g L-1). The removal of As(III) decreased with increasing As concentration in the aqueous solution. The Langmuir model was suitable to explain the sorption of As(III) on CSB with maximum sorption (q(max) = 102.78 mu g g(-1), R-2 = 0.99). High As(III) sorption might be attributed to high surface area (103.62 m(2) g(-1)) and presence of different functional groups (-OH, C=O, C-O) on the CSB surface that facilitated As(III) sorption and removal. The hazard quotient (HQ) of As-treated water showed HQ-values >1 (3.79 +/- 0.056, 2.00 +/- 0.030 and 1.31 +/- 0.102 at adsorbent biomass of 1, 2 and 3 g CSB L-1, respectively at a concentration of 50 mu g As L-1), indicating a harmful effect of As-treated water on human health. This study shows that CSB is an efficient adsorbent material and may be employed to remove a low concentration of As(III) from water, however, it should be monitored carefully for its risk to human health.
Details
- Title
- Biosorption and health risk assessment of arsenic contaminated water through cotton stalk biochar
- Creators
- Iftikhar Ahmad - COMSATS University IslamabadUmme Farwa - COMSATS University IslamabadZia Ul Haq Khan - COMSATS University IslamabadMuhammad Imran - COMSATS University IslamabadMuhammad Shafique Khalid - COMSATS University IslamabadBo Zhu - Shanghai Jiao Tong UniversityAtta Rasool - COMSATS University IslamabadGhulam Mustafa Shah - COMSATS University IslamabadMuhammad Tahir - COMSATS University IslamabadMunir Ahmed - COMSATS University IslamabadSalar Rezapour - Urmia UniversityLaura Bulgariu - Gheorghe Asachi Technical University of Iași
- Publication Details
- Surfaces and interfaces, Vol.29, 101806
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- 7814/Federal/NRPU/PD/HEC/2017 / Higher Education Commission of Pakistan under NRPU; Higher Education Commission of Pakistan 21-293/SRGP/RD/HEC/2014 / Higher Education Commission of Pakistan under SRGP; Higher Education Commission of Pakistan 19390743300 / Shanghai Science and Technology Committee; Shanghai Science & Technology Committee PN-III-P4-ID-PCE-2016-0500 / Romanian National Authority for Scientific Research, CNCS-UEFISCDI; Consiliul National al Cercetarii Stiintifice (CNCS); Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii (UEFISCDI)
- Identifiers
- 991013092524102368
- Copyright
- © 2022 Elsevier B.V. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article