caa a22 4500 605499179 CHVBK 20210128100549.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s00253-014-6149-x doi (NATIONALLICENCE)springer-10.1007/s00253-014-6149-x Nickel biosorption by discharged biomass from wastewater treatment bioreactor: size plays a key role [Elektronische Daten] [Dandan Zhou, Yang Yang, Yunbao Li, Zhengxue Xu, Shanshan Dong] Biomass size significantly affects the characteristics of the extracellular polymeric substances, which in turn influences the biosorption mechanisms. In this work, nickel biosorption mechanisms and the capacity of excess aerobic granules (AGs) of >850μm, 500-850μm, 212-500μm, and bioflocs <212μm, discharged during wastewater treatment operation, were investigated by elemental composition and spectroscopic analysis. Ni2+ biosorption capacity decreased apparently from 1.28-1.53 to 0.93mEq/g with the increase of biomass size from 0-850 to >850μm due to their different biosorption mechanisms. Chemical binding between nickel and protein was dominant for biomass less than 850μm, whereas nickel adsorption was mainly physical when biogranule size was greater than 850μm, because the nickel had no opportunity to interact with protein located in the core of the biogranule. Only low levels of ion exchange (<15.22%) and precipitation (negligible) were observed for all kinds of biomass. Thus, biomass greater and less than 850μm presented quite different biosorption mechanisms. Springer-Verlag Berlin Heidelberg, 2014 Biomass nationallicence Aerobic granules nationallicence Size nationallicence Nickel nationallicence Biosorption nationallicence Zhou Dandan Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut Yang Yang Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut Li Yunbao Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut Xu Zhengxue Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut Dong Shanshan Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/6(2015-03-01), 2829-2838 0175-7598 99:6<2829 2015 99 253 https://doi.org/10.1007/s00253-014-6149-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00253-014-6149-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhou Dandan Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut NATIONALLICENCE 700 1- Yang Yang Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut NATIONALLICENCE 700 1- Li Yunbao Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut NATIONALLICENCE 700 1- Xu Zhengxue Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut NATIONALLICENCE 700 1- Dong Shanshan Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, 130021, Changchun, China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/6(2015-03-01), 2829-2838 0175-7598 99:6<2829 2015 99 253