Spatiotemporal distribution, ecological risk assessment and source analysis of legacy and emerging Per- and Polyfluoroalkyl Substances in the Bohai Bay, China

Lin, Kun; Han, Tongzhu; Wang, Rui; Tan, Liju; Yang, Xue; Zhao, Ting; Chen, Yanshan; Wan, Mengmeng; Wang, Jiangtao

doi:10.1016/j.chemosphere.2022.134378

Cited by 26 publications

(2 citation statements)

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“…This source–sink exchange increased the complexity of NEOs in PRE . These results showed that the terrestrial input and human activities had a significant impact on the NEO concentration in estuarine environments, and the NEO inputs from inland rivers, outfalls, and WWTPs were important factors leading to a high NEO concentration in some sites of PRE …”

Section: Resultsmentioning

confidence: 78%

“…49 These results showed that the terrestrial input and human activities had a significant impact on the NEO concentration in estuarine environments, and the NEO inputs from inland rivers, outfalls, and WWTPs were important factors leading to a high NEO concentration in some sites of PRE. 50 Conversely, except for SS_NW7 (nearby port with fishing grounds), the other sample sites (SS_NW6 and SS_NW16) close to the mainland of Hainan Province, China, did not show an increased trend in SS_NW (Figure 2a−c), proving that the coastal sea was more vulnerable to the dilution of seawater than human activities and land-based inputs. 4 Moreover, the distribution characteristics of each sampling site in SS_XS showed that the NEO concentration in SS_XS1 (located on Yagong Island, China) was obviously superior to those in the other sampling sites in SS_XS (Figure 2d−f).…”

Section: ■ Results and Discussionmentioning

confidence: 88%

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Large Geographical Scale Study on the Concentrations, Distribution, and Source Analysis of Neonicotinoid Insecticides in Surface Waters of South China

Qin,

Wei,

Huang

et al. 2024

ACS EST Water

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This study investigated the residual levels of eight parent neonicotinoid insecticides (p-NEOs) and three NEO metabolites (m-NEOs) in surface waters of river−estuary−ocean systems on a large geographical scale in South China. Imidacloprid, thiamethoxam, acetamiprid, and clothianidin were dominant NEOs in surface waters. High levels of ∑NEOs were found in the upper reaches of Guangzhou section of the Pearl River (PR_GZ), indicating multiple input sources of NEOs in PR_GZ. Additionally, the decreased influence of terrestrial input and human activities was observed along with the flow direction, where the order of ∑NEOs concentration was PR_GZ (inland river, 64.5 ng/L) > Pearl River Estuary (estuary, 33.9 ng/L) > Xisha Islands of the South China Sea (SS_XS, open sea area, 27.0 ng/L); and the level in Northwestern South China Sea (coastal sea, 49.9 ng/L) was also higher than that in open sea area. The estimated annual fluxes of NEOs released into the South China Sea totaled 34.8 ± 20.4 tons, most of which come from the Pearl River basin. To the best of our knowledge, this is the first study to assess the concentrations, distribution, and source analysis of NEOs in river−estuary−ocean systems in South China.

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Section: Resultsmentioning

confidence: 78%