Inference of emission history of neonicotinoid pesticides from marine sediment cores impacted by riverine runoff of a developed agricultural region: The Pearl River Basin, China

Zhang, Chao; Dionysiou, Dionysios D.; Wen, Rubing; Zhang, Huike; Wan, Xin; Wang, Xinzhi; Li, Feng; Li, Yingqiang; Zhou, Qiao; Ying, Guang‐Guo; Huang, Mingzhi

doi:10.1016/j.watres.2022.118475

Cited by 15 publications

(4 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydroxylation is considered the primary mechanism for dechlorination (the cleavage of the C–Cl bond) in the NTP transformations. The high electronegativity and bond energy endow C–Cl bonds with relatively strong stability. ,, The nonhalogenated pathway of NTP was based on the hydroxylation of the C–Cl bond, indicating the strong oxidation capacity of the NGNT–PMS reaction system. Additionally, the formed products of OP-173 and OP-332 ( m / z 173.99 and 332.05) in the halogenated pathway were identified as the intermediates by hydroxylation.…”

Section: Resultsmentioning

confidence: 99%

“…Heterocyclic contaminants, especially with the incorporation of N atoms, pose a significant threat to humans and other organisms due to their strong teratogenicity, mutagenicity, and carcinogenicity. − A series of emerging recalcitrant heterocyclic contaminants, e.g., nitenpyram (NTP), thiamethoxam (THM), imidacloprid (IMI), and thiacloprid (THA), have N -heterocyclic frameworks, such as pyridine, thiazole, and imidazole. , Increasing evidence suggests that short exposure to NTP could induce colonic mucosal damage, nonalcoholic steatohepatitis, chronic brain toxicity response, and negative effects on reproduction, development, and metabolic gene expression. − Exposure to THM and its degradation intermediates leads to hepatotoxicity and hepatocarcinogenicity . Long-term IMI intake increases reproductive organ damage with increasing concentration due to the oxidative toxicity of DNA .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen-Doped Graphdiyne Nanotubes for Metal-Free Activation of Peroxymonosulfate and Enhanced Degradation of Recalcitrant Heterocyclic Contaminants

Zhang

Wan

et al. 2023

ACS EST Eng.

Self Cite

View full text Add to dashboard Cite

Pollution removal via peroxymonosulfate (PMS)-mediated advanced oxidation processes provides an effective approach for water remediation. Although numerous carbon allotropes have been applied in PMS activation, the application of graphdiyne-based catalysts has been practically unexplored in this process despite their excellent electronic properties. In this study, the first instance of exploiting N-doped graphdiyne nanotubes (NGNTs) for metal-free PMS activation is presented to remove recalcitrant heterocyclic contaminants in aqueous environments. This mechanistic study demonstrates that the NGNT−PMS system decomposes heterocyclic contaminants via electron-transfermediated nonradical oxidation, where metastable NGNT−PMS* complexes were the primary oxidants. The apparent reaction rate constant for the NGNT−PMS system is 2.4 and 3.1 times higher than those for the counterpart systems by N-doped carbon nanotubes (NCNTs) and graphene oxide (NGO) systems, respectively. The NGNT exhibits excellent N-doping potential, demonstrated by a 7-fold increase in atomic nitrogen compared to NCNT in an identical Ndoping procedure. The possible N-doping sites in NGNT were determined as mainly sp-N-1, sp-N-2, pyridinic-N, amino-N, and graphitic-N atoms by the N K-edge X-ray absorption near-edge structure spectra and X-ray photoelectron spectroscopy. Theoretical calculations demonstrate the relatively obvious electron transfer between PMS and different N-sites in NGNT, indicating the possible formation of NGNT−PMS* complexes. Additionally, the NGNT−PMS system plays an important role in the cleavage of pyridine heterocycles and C−Cl bonds as demonstrated by the destruction of nitenpyram. This study provides mechanistic insights into the roles of NGNT in the metal-free activation of PMS for the remediation of recalcitrant heterocyclic contaminants.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Graphdiyne Nanotubes for Metal-Free Activation of Peroxymonosulfate and Enhanced Degradation of Recalcitrant Heterocyclic Contaminants

Zhang

Wan

et al. 2023

ACS EST Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…22 It is considered as one of the most agriculturally developed regions in China. 23 Statistically, about 52.9 ± 34.6 tons of NEOs were released from the Pearl River Basin and Hainan province to the South China Sea in 2016, and this value is 35.0 and 19.6 times higher than those loads released into the Yellow Sea and Bohai Sea, respectively. 14 Although very limited studies reported the residual levels of NEOs in the Pearl River in South China, 19,24 information on NEOs in river−estuary−ocean systems is unavailable in this area.…”

Section: ■ Introductionmentioning

confidence: 95%

“…The Pearl River Basin has an annual runoff of 338.1 billion cubic meters, only after the Yangtze River, China (985.7 billion cubic meters) . It is considered as one of the most agriculturally developed regions in China . Statistically, about 52.9 ± 34.6 tons of NEOs were released from the Pearl River Basin and Hainan province to the South China Sea in 2016, and this value is 35.0 and 19.6 times higher than those loads released into the Yellow Sea and Bohai Sea, respectively .…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

Theoretical insights, degradation, and sub-lethal toxicity of thiamethoxam to the planarian Girardia tigrina

Gravato,

da Silva Barbosa,

Cavallini

et al. 2024

Environ Sci Pollut Res

View full text Add to dashboard Cite

Inference of emission history of neonicotinoid pesticides from marine sediment cores impacted by riverine runoff of a developed agricultural region: The Pearl River Basin, China

Cited by 15 publications

References 56 publications

Nitrogen-Doped Graphdiyne Nanotubes for Metal-Free Activation of Peroxymonosulfate and Enhanced Degradation of Recalcitrant Heterocyclic Contaminants

Nitrogen-Doped Graphdiyne Nanotubes for Metal-Free Activation of Peroxymonosulfate and Enhanced Degradation of Recalcitrant Heterocyclic Contaminants

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

Theoretical insights, degradation, and sub-lethal toxicity of thiamethoxam to the planarian Girardia tigrina

Contact Info

Product

Resources

About