TY - JOUR
T1 - Irrigation using hybrid constructed wetland treated domestic sewage
T2 - Uptake of phthalic acid esters and antibiotics by Ipomoea aquatica forssk
AU - Tang, Xiaoyan
AU - Liu, Huanping
AU - Naïla, Razanatsoa Siou Line
AU - Dai, Yunv
AU - Zhang, Xiaomeng
AU - Tam, Nora Fung yee
AU - Xiong, Chunhui
AU - Yang, Yang
N1 - Publisher Copyright:
© 2020
PY - 2021/3/5
Y1 - 2021/3/5
N2 - Irrigation with treated wastewater (WW) has been promoted to meet global water demands. This study investigates the occurrence and accumulation of targeted phthalic acid esters (PAEs) and antibiotics in soil and Ipomoea aquatica Forssk. irrigated with WW discharged from six hybrid constructed wetlands (HCWs), with evaluation of the associated human health risks. Results revealed that HCWs can effectively reduce the transfer of PAEs and antibiotics to soil and I. aquatica. HCW2 (VF-SF-HF) was found to be most efficient for the removal of PAEs (68.4%−95.3%) and antibiotics (28.5%−99.4%). Among the targeted PAEs, the concentration of bis (2-ethyl) hexylphthalate (DEHP) was the highest in irrigation water, soil and I. aquatica, while benzylphthalate (BBP) exhibited the highest bioconcentration factor (BCFF). Among the targeted antibiotics, the concentration of sulfapyridine (SPD) was highest in various environmental media, while norfloxacin (NFX) exhibited the highest BCFF. The properties of PAEs and antibiotics were found to be responsible for the differential uptake patterns. The estimation of the threshold of toxicological concern and hazard quotient showed that I. aquatica irrigated with HCWs treated wastewater presented a minor risk to human health. However, comprehensive safety evaluation is required for the widespread use of HCWs treated wastewater for irrigation purposes.
AB - Irrigation with treated wastewater (WW) has been promoted to meet global water demands. This study investigates the occurrence and accumulation of targeted phthalic acid esters (PAEs) and antibiotics in soil and Ipomoea aquatica Forssk. irrigated with WW discharged from six hybrid constructed wetlands (HCWs), with evaluation of the associated human health risks. Results revealed that HCWs can effectively reduce the transfer of PAEs and antibiotics to soil and I. aquatica. HCW2 (VF-SF-HF) was found to be most efficient for the removal of PAEs (68.4%−95.3%) and antibiotics (28.5%−99.4%). Among the targeted PAEs, the concentration of bis (2-ethyl) hexylphthalate (DEHP) was the highest in irrigation water, soil and I. aquatica, while benzylphthalate (BBP) exhibited the highest bioconcentration factor (BCFF). Among the targeted antibiotics, the concentration of sulfapyridine (SPD) was highest in various environmental media, while norfloxacin (NFX) exhibited the highest BCFF. The properties of PAEs and antibiotics were found to be responsible for the differential uptake patterns. The estimation of the threshold of toxicological concern and hazard quotient showed that I. aquatica irrigated with HCWs treated wastewater presented a minor risk to human health. However, comprehensive safety evaluation is required for the widespread use of HCWs treated wastewater for irrigation purposes.
KW - Antibiotics
KW - Human health risks
KW - Hybrid constructed wetlands
KW - Phthalic acid esters (PAEs)
KW - Wastewater irrigation
UR - http://www.scopus.com/inward/record.url?scp=85094557703&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2020.124025
DO - 10.1016/j.jhazmat.2020.124025
M3 - Article
C2 - 33129603
AN - SCOPUS:85094557703
SN - 0304-3894
VL - 405
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 124025
ER -
