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Co-transport and de...
Co-transport and deposition of fluoride using rice husk-derived biochar in saturated porous media : Effect of solution chemistry and surface properties
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- Kumar, Rakesh (författare)
- Nalanda Univ, Sch Ecol & Environm Studies, Rajgir 803116, Bihar, India.
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- Sharma, Prabhakar (författare)
- Nalanda Univ, Sch Ecol & Environm Studies, Rajgir 803116, Bihar, India.
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- Rose, Pawan Kumar (författare)
- Chaudhary Devi Lal Univ, Dept Energy & Environm Sci, Sirsa 125055, Haryana, India.
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- Sahoo, Prafulla Kumar (författare)
- Cent Univ Punjab, Sch Environm & Earth Sci, Dept Environm Sci & Technol, Bathinda 151001, Punjab, India.
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- Bhattacharya, Prosun, 1962- (författare)
- KTH,Vatten- och miljöteknik
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- Pandey, Ashok (författare)
- CSIR Indian Inst Toxicol Res, Ctr Innovat & Translat Res, Lucknow 226001, India.;Univ Petr & Energy Studies, Sch Engn, Sustainabil Cluster, Dehra Dun 248007, Uttarakhand, India.
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- Kumar, Manish (författare)
- Univ Petr & Energy Studies, Sch Engn, Sustainabil Cluster, Dehra Dun 248007, Uttarakhand, India.;Tecnol Monterrey, Escuela Ingn & Ciencias, Campus Monterrey,Eugenio Garza Sada 2501 Sur, Monterrey 64849, Mexico.
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Nalanda Univ, Sch Ecol & Environm Studies, Rajgir 803116, Bihar, India Chaudhary Devi Lal Univ, Dept Energy & Environm Sci, Sirsa 125055, Haryana, India. (creator_code:org_t)
- Elsevier BV, 2023
- 2023
- Engelska.
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Ingår i: Environmental Technology & Innovation. - : Elsevier BV. - 2352-1864. ; 30
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Fluoride (F-) contamination in water is a global health concern, threatening the well-being of millions. This study investigated the role of ZnCl2/FeCl3-rice husk-modified biochar (Zn-BC and Zn/Fe-BC) in treating F--contaminated surface and groundwater under the influence of varying solution chemistry, co-existing ions, and biochar-amended through column transport experiments. Modified biochar showed maximum F- adsorp-tion, 99.01% and 91.90% using Zn/Fe-BC and Zn-BC, respectively, than 85.87% using raw biochar (R-BC). Raw/modified biochars were characterized with FESEM-EDAX, FTIR, XRD, particle size, surface area, electro-kinetic potential, and point of zero charge analyses. Langmuir and pseudo-second-order kinetic could explain that F--biochar interactions are dominated by chemisorption at ambient temperature while physisorption at higher temperatures. The influence of salt concentrations and co-occurring ions reduced F- sorption using Zn/Fe-BC. Increased salt strengths led to reduced electrophoretic mobility of biochar particles, i.e., biochar-biochar particles attract each other and increase the hydrodynamic diameter, which ultimately reduces the active sites on biochar for F- adsorption. Co-transport and deposition of biochar and F- in saturated porous media revealed lower mobility of biochar, and maximum F- adsorption was observed at 10 mM salt strength. Biochar transport is governed by electrostatic interactions, whereas F- transport mainly occurs through chemisorption. In rural areas, hand pumps and tube wells are generally used as source of potable water for drinking and cooking purposes; thus, biochar-mediated sand columns can be utilized for defluoridation. Thus, Zn/Fe-BC can be utilized as a potential bio-adsorbent for F--contaminated natural surface and groundwater with optimum preparation and treatment costs.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- Fluoride removal
- Groundwater
- Biochar
- Adsorption
- Mass transfer
- Salt strength
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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