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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dc.contributor.authorKumar, Rakesh
dc.contributor.authorSharma, Prabhakar
dc.contributor.authorRose, Pawan Kumar
dc.contributor.authorSahoo, Prafulla Kumar
dc.contributor.authorBhattacharya, Prosun
dc.contributor.authorPandey, Ashok
dc.contributor.authorKumar, Manish
dc.date.accessioned2024-01-21T10:50:50Z
dc.date.accessioned2024-08-14T06:39:47Z
dc.date.available2024-01-21T10:50:50Z
dc.date.available2024-08-14T06:39:47Z
dc.date.issued2023-02-10T00:00:00
dc.description.abstractFluoride (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? adsorption, 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. � 2023 The Authorsen_US
dc.identifier.doi10.1016/j.eti.2023.103056
dc.identifier.issn23521864
dc.identifier.urihttp://10.2.3.109/handle/32116/4029
dc.identifier.urlhttps://linkinghub.elsevier.com/retrieve/pii/S2352186423000524
dc.language.isoen_USen_US
dc.publisherElsevier B.V.en_US
dc.subjectAdsorptionen_US
dc.subjectBiocharen_US
dc.subjectFluoride removalen_US
dc.subjectGroundwateren_US
dc.subjectMass transferen_US
dc.subjectSalt strengthen_US
dc.titleCo-transport and deposition of fluoride using rice husk-derived biochar in saturated porous media: Effect of solution chemistry and surface propertiesen_US
dc.title.journalEnvironmental Technology and Innovationen_US
dc.typeArticleen_US
dc.type.accesstypeOpen Accessen_US

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