TY - JOUR
T1 - Sorption of norfloxacin, sulfamerazine and oxytetracycline by KOH-modified biochar under single and ternary systems
AU - Luo, Jiwei
AU - Li, Xue
AU - Ge, Chengjun
AU - Müller, Karin
AU - Yu, Huamei
AU - Huang, Peng
AU - Li, Jiatong
AU - Tsang, Daniel C.W.
AU - Bolan, Nanthi S.
AU - Rinklebe, Jörg
AU - Wang, Hailong
PY - 2018/9
Y1 - 2018/9
N2 - Pollution of water by single antibiotics has been investigated in depth. However, in reality, a wide range of different contaminants is often mixed in the aquatic environment (contaminant cocktail). Here, single and competitive sorption dynamics of ionizable norfloxacin (NOR), sulfamerazine (SMR) and oxytetracycline (OTC) by both pristine and modified biochars were investigated. Sorption kinetics of the three antibiotics was faster in ternary-solute than single-solute system. Sorption efficiency was enhanced in the competitive system for NOR by the pristine biochar, and for OTC by both the pristine biochar and the modified biochar, while SMR sorption by the pristine biochar and the KOH-modified biochar was inhibited. Sorption was governed by electrostatic interactions, & #x03C0;-π EDA and H-bonds for antibiotics sorption by biochar. SMR and OTC sorption by biochar was influenced by cation bridging and surface complexation, respectively. This research finding will guide the development of treatment procedures for water polluted by multiple antibiotics.
AB - Pollution of water by single antibiotics has been investigated in depth. However, in reality, a wide range of different contaminants is often mixed in the aquatic environment (contaminant cocktail). Here, single and competitive sorption dynamics of ionizable norfloxacin (NOR), sulfamerazine (SMR) and oxytetracycline (OTC) by both pristine and modified biochars were investigated. Sorption kinetics of the three antibiotics was faster in ternary-solute than single-solute system. Sorption efficiency was enhanced in the competitive system for NOR by the pristine biochar, and for OTC by both the pristine biochar and the modified biochar, while SMR sorption by the pristine biochar and the KOH-modified biochar was inhibited. Sorption was governed by electrostatic interactions, & #x03C0;-π EDA and H-bonds for antibiotics sorption by biochar. SMR and OTC sorption by biochar was influenced by cation bridging and surface complexation, respectively. This research finding will guide the development of treatment procedures for water polluted by multiple antibiotics.
KW - Antibiotics
KW - Competitive sorption
KW - Engineered biochar
KW - Organic pollutant
KW - Sorption modeling
UR - http://www.scopus.com/inward/record.url?scp=85046715572&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2018.05.022
DO - 10.1016/j.biortech.2018.05.022
M3 - Article
C2 - 29763802
AN - SCOPUS:85046715572
SN - 0960-8524
VL - 263
SP - 385
EP - 392
JO - Bioresource Technology
JF - Bioresource Technology
ER -
