TY - JOUR
T1 - Biochar based removal of antibiotic sulfonamides and tetracyclines in aquatic environments
T2 - A critical review
AU - Peiris, Chathuri
AU - Gunatilake, Sameera R.
AU - Mlsna, Todd E.
AU - Mohan, Dinesh
AU - Vithanage, Meththika
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/12
Y1 - 2017/12
N2 - Utilization of biochar (BC) as a low cost adsorbent for water remediation has gained an immense research interest due to their surface functionality and porosity. Although many reports on the BC based sorptive removal of Sulfonamides (SA) and Tetracyclines (TC) are available in literature, a deep insight into sorption mechanisms is yet to be reviewed. Objective of this review is to fill the research gap of a methodological understanding of sorption mechanisms and characteristics which is essential to develop efficient methods for contaminant removal. The most common adsorption mechanism can be considered as electron donor-acceptor interactions of electron withdrawing moieties with surface arene rings. The strongest adsorption of both antibiotics occurs at mildly acidic pH where the dominant species are zwitterionic or cationic. Smaller SAs exhibit micro pore-filling effects while bulky TCs experience size exclusions. Furthermore, the effect of matrix components and modifications are also been taken into account.
AB - Utilization of biochar (BC) as a low cost adsorbent for water remediation has gained an immense research interest due to their surface functionality and porosity. Although many reports on the BC based sorptive removal of Sulfonamides (SA) and Tetracyclines (TC) are available in literature, a deep insight into sorption mechanisms is yet to be reviewed. Objective of this review is to fill the research gap of a methodological understanding of sorption mechanisms and characteristics which is essential to develop efficient methods for contaminant removal. The most common adsorption mechanism can be considered as electron donor-acceptor interactions of electron withdrawing moieties with surface arene rings. The strongest adsorption of both antibiotics occurs at mildly acidic pH where the dominant species are zwitterionic or cationic. Smaller SAs exhibit micro pore-filling effects while bulky TCs experience size exclusions. Furthermore, the effect of matrix components and modifications are also been taken into account.
KW - Biochar
KW - Residue sulfonamides
KW - Residue tetracyclines
KW - Sorptive removal
UR - http://www.scopus.com/inward/record.url?scp=85026840792&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2017.07.150
DO - 10.1016/j.biortech.2017.07.150
M3 - Review article
C2 - 28789905
AN - SCOPUS:85026840792
VL - 246
SP - 150
EP - 159
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
ER -
