title: Arsenic(V) biosorption by charred orange peel in aqueous environments.
abstract: Biosorption efficiency of natural orange peel (NOP) and charred orange peel (COP) was examined for the immobilization of arsenate (As(V)) in aqueous environments using batch sorption experiments. Sorption experiments were carried out as a function of pH, time, initial As(V) concentration and biosorbent dose, using NOP and COP (pretreated with sulfuric acid). Arsenate sorption was found to be maximum at pH 6.5, with higher As(V) removal percentage (98%) by COP than NOP (68%) at 4 g L(-1) optimum biosorbent dose. Sorption isotherm data exhibited a higher As(V) sorption (60.9 mg g(-1)) for COP than NOP (32.7 mg g(-1)). Langmuir model provided the best fit to describe As(V) sorption. Fourier transform infrared spectroscopy and scanning electron microscopy combined with energy dispersive X-ray spectroscopy analyses revealed that the -OH, -COOH, and -N-H surface functional groups were involved in As(V) biosorption and the meso- to micro-porous structure of COP sequestered significantly (2-times) higher As(V) than NOP, respectively. Arsenate desorption from COP was found to be lower (10%) than NOP (26%) up to the third regeneration cycle. The results highlight that this method has a great potential to produce unique 'charred' materials from the widely available biowastes, with enhanced As(V) sorption properties.
authors.affiliation: a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Abid
authors.affiliation: a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan.|b Southern Cross GeoScience , Southern Cross University , Lismore , NSW , Australia.
authors.forename: Nabeel Khan
authors.initials: NK
authors.lastname: Niazi
authors.affiliation: a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan.|b Southern Cross GeoScience , Southern Cross University , Lismore , NSW , Australia.
authors.forename: Irshad
authors.initials: I
authors.lastname: Bibi
authors.affiliation: c Environmental Geochemistry Laboratory, Department of Environmental Sciences , Quaid-i-Azam University , Islamabad , Pakistan.
authors.forename: Abida
authors.initials: A
authors.lastname: Farooqi
authors.affiliation: d Korea Biochar Research Center & Department of Biological Environment , Kangwon National University , Chuncheon , Korea.
authors.forename: Yong Sik
authors.initials: YS
authors.lastname: Ok
authors.affiliation: e Chemical Safety Division, Department of Agro-Food Safety , National Academy of Agricultural Science , Wanju-gun , Jeollabuk-do , Republic of Korea.
authors.forename: Anitha
authors.initials: A
authors.lastname: Kunhikrishnan
authors.affiliation: f Department of Plant Breeding and Genetics , University of Agriculture Faisalabad , Faisalabad , Pakistan.
authors.forename: Fawad
authors.initials: F
authors.lastname: Ali
authors.affiliation: g Department of Environmental Sciences , Government College University , Faisalabad , Pakistan.
authors.forename: Shafaqat
authors.initials: S
authors.lastname: Ali
authors.affiliation: d Korea Biochar Research Center & Department of Biological Environment , Kangwon National University , Chuncheon , Korea.
authors.forename: Avanthi Deshani
authors.initials: AD
authors.lastname: Igalavithana
authors.affiliation: a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Arshad
mesh_terms: D001151:Arsenic / Q000378:metabolism*; D032084:Citrus sinensis / Q000378:metabolism*; D014867:Water; D018508:Water Purification
chemical_list: D014867:Water; D001151:Arsenic
keywords: arsenic remediation; bioremoval; biosorbents; contamination; drinking water; wastewater