Selected antibiotics and current-use pesticides in riverine runoff of an urbanized river system in association with anthropogenic stresses

Zhang, Xiang-Pu; Zhang, Yuyu; Mai, Lei; Liu, Liang‐Ying; Bao, Lian-Jun; Zeng, Eddy Y.

doi:10.1016/j.scitotenv.2020.140004

Cited by 25 publications

(13 citation statements)

References 51 publications

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“…Among the eight outlets, HM predominated and accounted for over 50% of the total mass load of Σantibiotics, whereas HT contributed the least. HM is the largest outlet of the Pearl River, and the predominance of HM in the mass loads of antibiotics was also found in two previous studies, both of which, however, reported a <30% contribution from HM. , …”

Section: Resultssupporting

confidence: 55%

“…HM is the largest outlet of the Pearl River, and the predominance of HM in the mass loads of antibiotics was also found in two previous studies, both of which, however, reported a <30% contribution from HM. 8 , 9 …”

Section: Resultsmentioning

confidence: 99%

“…With its high population and industrial density and numerous animal husbandry and aquaculture facilities, the Great Bay Area (GBA) is a hotspot for contamination by ECCs such as pharmaceuticals, especially in the aquatic environment of the Peal River Estuary (PRE) . Several studies have reported the seasonal occurrence of antibiotics in the PRE; − however, despite the use of over 14 therapeutic classes of antibiotics, these studies only analyzed four classes. Two studies in particular investigated the occurrence of antibiotics at all eight outlets; however, these studies were conducted at different sampling times and did not consider the influence of tidal events, resulting in increased bias in the instant mass loading estimation. , With regard to psychiatric pharmaceuticals, no studies have reported their occurrence in PRE waters to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have reported the seasonal occurrence of antibiotics in the PRE; − however, despite the use of over 14 therapeutic classes of antibiotics, these studies only analyzed four classes. Two studies in particular investigated the occurrence of antibiotics at all eight outlets; however, these studies were conducted at different sampling times and did not consider the influence of tidal events, resulting in increased bias in the instant mass loading estimation. , With regard to psychiatric pharmaceuticals, no studies have reported their occurrence in PRE waters to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

“…Two studies in particular investigated the occurrence of antibiotics at all eight outlets; however, these studies were conducted at different sampling times and did not consider the influence of tidal events, resulting in increased bias in the instant mass loading estimation. 8,9 With regard to psychiatric pharmaceuticals, no studies have reported their occurrence in PRE waters to the best of our knowledge. Regulations aimed at protecting marine environments from the impacts of ECCs, including those of pharmaceuticals in the GBA, have been inadequate.…”

Section: ■ Introductionmentioning

confidence: 99%

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Source Apportionment, Hydrodynamic Influence, and Environmental Stress of Pharmaceuticals in a Microtidal Estuary with Multiple Outlets in South China

Ruan

Huang

et al. 2022

Environ. Sci. Technol.

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Pharmaceutical residues in the environment are of great concern as ubiquitous emerging contaminants. This study investigated the presence of 40 pharmaceuticals in water and sediment of the Pearl River Estuary (PRE) in the wet season of 2020. Among psychiatric drugs, only diazepam was found in water samples while six of them were detected in the sediment. The Σantibiotics levels ranged from 6.18 to 35.9 ng/L and 2.63 to 140 ng/g dry weight in water and sediment samples, respectively. Fluoroquinolones and tetracyclines were found well settling in the outlet sediment, while sulfonamides could be released from disturbed sediment under stronger tidal wash-out conditions. After entering the marine waters, pharmaceuticals tended to deposit at the PRE mouth by the influence of the plume bulge and onshore invasion of deep shelf waters. Low ecological risks to the aquatic organisms and of causing antimicrobial resistance were identified. Likewise, hydrological modeling results revealed insignificant risks: erythromycin-H 2 O and sulfamethoxazole discharged through the outlets constituted 30.8% and 6.74% of their environmental capacity, respectively. Source apportionment revealed that pharmaceutical discharges through the Humen and Yamen outlets were predominantly of animal origin. Overall, our findings provide strategic insights on environmental regulations to further minimize the environmental stress of pharmaceuticals in the PRE.

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 99%