Comparison of biochars derived from different types of feedstock and their potential for heavy metal removal in multiple-metal solutions
Zhao, Jing Jing (Universitat Autònoma de Barcelona. Departament de Química)
Shen, Xin-Jie (Oil Crops Research Institute of Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture (China))
Domene, Xavier (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Alcañiz, Josep M. (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Liao, Xing (Oil Crops Research Institute of Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops of the Ministry of Agriculture (China))
Palet i Ballús, Cristina (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2019
Resum:	Three different types of feedstocks and their biochars were used to remove Cr(III), Cd(II), Cu(II) and Pb(II) ions from a mixture of multiple heavy metals. The effect of the initial concentration of heavy metals in solution has been analysed, and kinetics modelling and a comparison of the adsorption capacity of such materials have been performed to elucidate the possible adsorption mechanisms. The results show that the adsorption capacity is dependent on the type of feedstock and on the pyrolysis conditions. The adsorption capacity of the biomass types is ranked as follows: FO (from sewage sludge)» LO > ZO (both from agriculture biomass waste)» CO (from wood biomass waste). Biochars, which are the product of the pyrolysis of feedstocks, clearly improve the adsorption efficiency in the case of those derived from wood and agricultural biomasses. Complexation and cation exchange have been found to be the two main adsorption mechanisms in systems containing multiple heavy metals, with cation exchange being the most significant. The pore structure of biomass/biochar cannot be neglected when investigating the adsorption mechanism of each material. All the disposal biomasses presented here are good alternatives for heavy metal removal from wastewaters.
Ajuts:	Ministerio de Economía y Competitividad CTM2015-65414-C2-1-R Ministerio de Economía y Competitividad AGL2015-70393-R
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Environmental chemistry ; Environmental sciences
Publicat a:	Scientific reports, Vol. 9 (July 2019) , art. 9869, ISSN 2045-2322

DOI: 10.1038/s41598-019-46234-4
PMID: 31285499

12 p, 3.2 MB

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