title: Biochar pyrolytically produced from municipal solid wastes for aqueous As(V) removal: adsorption property and its improvement with KOH activation.
abstract: Biochar converted from waste products is being considered as an alternative adsorbent for removal of aqueous heavy metal(loid)s. In this work, experimental and modeling investigations were conducted to examine the effect of biochars pyrolytically produced from municipal solid wastes on removing aqueous As(V) before and after activated by 2M KOH solution. Results showed that the highest adsorption capacity of pristine biochars was 24.49 mg/g. The pseudo-second-order model and Langmuir adsorption isotherm model can preferably describe the adsorption process. The activated biochar showed enhanced As(V) adsorption ability with an adsorption capacity of 30.98 mg/g, which was more than 1.3 times of pristine biochars, and 2-10 times of modified biochars reported by other literatures. Increase of surface area and changes of porous texture, especially the functional groups on the surface of activated biochars are the major contributors to its more efficient adsorption of As(V).
authors.affiliation: Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Nanjing 210014, PR China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Nanjing 210014, PR China; Department of Biological and Agricultural Engineering, Texas A&M University, College Station 77843, USA.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Jin
authors.affiliation: Department of Biological and Agricultural Engineering, Texas A&M University, College Station 77843, USA.
authors.forename: Sergio
authors.initials: S
authors.lastname: Capareda
authors.affiliation: Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Nanjing 210014, PR China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Nanjing 210014, PR China. Electronic address: hanyu312@gmail.com.
authors.forename: Zhizhou
authors.initials: Z
authors.lastname: Chang
authors.affiliation: Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.affiliation: Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Nanjing 210014, PR China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Nanjing 210014, PR China.
authors.forename: Yueding
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Nanjing 210014, PR China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture, Nanjing 210014, PR China.
authors.forename: Jianying
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000302:isolation & purification*; D018533:Biomass; D002606:Charcoal / Q000138:chemical synthesis* / Q000737:chemistry; D002947:Cities; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides / Q000737:chemistry*; D007700:Kinetics; D016062:Porosity; D017680:Potassium Compounds / Q000737:chemistry*; D062611:Solid Waste; D013781:Texas; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
chemical_list: D006878:Hydroxides; D017680:Potassium Compounds; D062611:Solid Waste; D014874:Water Pollutants, Chemical; C540010:biochar; D002606:Charcoal; D001151:Arsenic; C029943:potassium hydroxide
keywords: Adsorption property; Aqueous As(V); Biochar; KOH activation; Municipal solid wastes