Accumulation and fate processes of organochlorine pesticides (OCPs) in soil profiles in Mt. Shergyla, Tibetan Plateau: A comparison on different forest types

Luo, Yadan; Yang, Ruiqiang; Li, Yingming; Wang, Pu; Zhu, Ying; Yuan, Guo‐Li; Zhang, Qinghua; Jiang, Guibin

doi:10.1016/j.chemosphere.2019.05.181

Cited by 27 publications

(7 citation statements)

References 53 publications

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“…Fresh inputs were also observed for HCHs and heptachlor in soil and groundwater in the middle reaches of the Yangtze River Basin, China [ 13 ] and for DDTs in the soil from Mt. Shergyla, Tibetan Plateau, China [ 14 ]. These emphasize the need to continuously investigate the occurrence of OCPs in the environment and accordingly adjust policies for risk control.…”

Section: Introductionmentioning

confidence: 99%

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Chen

Zeng

Liu

et al. 2021

IJERPH

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Excessive reclamation and improper use of agrochemicals in karst areas leads to serious non-point source pollution, which is of great concern and needs to be controlled, since contaminants can easily pollute groundwater due to the thin patchy soil and developed karst structures. The occurrences of organochlorine pesticides (OCPs) in karst soil were investigated by analyzing 25 OCPs in the karst soils near the Three Gorges Dam, China. The total concentrations of OCPs ranged 161–43,100 (6410 ± 9620) pg/g, with the most abundant compounds being p,p’-DDT and mirex. The concentration differences between the orchard and vegetable field and between upstream and downstream presented the influences of land-use type and water transport on the OCP spatial distributions. Composition analysis indicated the possible fresh inputs of lindane, technical DDT, aldrin, endrin, mirex, and methoxychlor. Their illegal uses implied an insufficient agrochemical management system in undeveloped karst areas. Principal component analysis with multiple linear regression analysis characterized the dominant sources from current agricultural use and current veterinary use in the study area. OCPs in the soils might not pose significant cancer risk for the residents, but they need to be controlled due to their illegal uses and bioaccumulation effect via the food chain.

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Section: Introductionmentioning

confidence: 99%

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Chen

Zeng

Liu

et al. 2021

IJERPH

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“…Some samples, collected during surface‐ice melting in the Arctic Ocean, had high ratios during both the forward and returned voyages, as p,p ′ ‐ DDT stored beneath the surface sea ice was reexposed to air with accelerated degradation to p,p ′ ‐ DDD and p,p ′ ‐ DDE (Geisz et al, 2008; Hung et al, 2016; Wu et al, 2010). The (DDD + DDE)/DDT ratios at most middle‐latitude stations were <1, indicating new sources in the vicinity, which are possibly due to rising temperatures that cause DDTs in the soil to volatilize and also to be released into land runoff (Luo et al, 2019; Ren et al, 2019; Vizcaino & Pistocchi, 2010). The use of dicofol, with impurities that include p,p ′ ‐ DDT, in China and Russia during the late spring and summer could also be a potential source (Qiu et al, 2005; Zheng et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Seasonal Variation of Legacy Organochlorine Pesticides (OCPs) From East Asia to the Arctic Ocean

Zheng

Gao

Xia

et al. 2020

Geophysical Research Letters

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Large-scale field investigations of seven legacy organochlorine pesticides (OCPs) in the surface seawater and atmosphere from East Asia to the high Arctic Ocean were completed in 2016 and 2017. Seawater OCP (Σ 7 OCPs) concentrations displayed rapid and significant seasonal variations during mid-late summer. The ocean is the most significant atmospheric-OCP source region for the Arctic, and feedback affects the middle-or low-latitude regions of the Northern Hemisphere. The legacy OCP concentrations in the Arctic Ocean were shown to gradually decrease with distance from water masses originating in the Bering Sea and the landmass of Alaska. This study is the first updated investigation of OCPs along the North Pacific Ocean to the Arctic Ocean transect in the past decade. It provides updated field data on the global fate of OCPs in a region undergoing rapid climate change. Plain Language Summary We investigated four hexachlorocyclohexanes (HCHs) and three dichlorodiphenyltrichloroethanes (DDTs) in the marine boundary and their fate corresponding to the geophysical climate change from East Asia to the high Arctic during two Arctic Research Expedition cruises. Levels of OCPs in the surface seawater between the forward and return voyages along the same transect indicated the rapid seasonal variation. The reducing DDT contamination and comparable HCH levels to the previous studies in the low-latitude regions indicated the effective control measures in the past decades. However, the potential point source and agriculture activities still resulted in the high levels of DDTs in East Asia. Water mass from the Bering Sea significantly affected the levels of dissolved OCPs in the Arctic Ocean, while China, Japan, and East Russia were the crucial source regions for the atmospheric OCPs in East Asia. The Arctic Ocean becomes a significant source region, and possible feedback affects the low-latitude regions in East Asia.

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“…Semi-volatile pesticide residues have been reported from agricultural soils worldwide (e.g., Malaysia 17 , India 18 , 19 , China 20 – 22 , Kenya 23 , European Union 24 and Mexico 25 ), but also in forest soils (e.g. Tibet 26 , 27 , China 28 , Uganda 29 , Republic Czech 30 , England 31 , Argentina 32 and Brazil 33 ).…”

Section: Introductionmentioning

confidence: 99%

Pesticides in a case study on no-tillage farming systems and surrounding forest patches in Brazil

Silva

Nicola

DUDAS

et al. 2021

Sci Rep

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With the growing global concern on pesticide management, the relationship between its environmental recalcitrance, food security and human health has never been more relevant. Pesticides residues are known to cause significant environmental contamination. Here, we present a case study on long-term no-tillage farming systems in Brazil, where Glyphosate (GLY) has been applied for more than 35 years. GLY and its main breakdown product, aminomethylphosphonic acid (AMPA) were determined in topsoil (0–10 cm) samples from no-tillage fields and nearby subtropical secondary forests by high-performance liquid chromatography coupled with a fluorescence detector. In addition, the presence of carbamates, organochlorines, organophosphates and triazines were also screened for. GLY and AMPA were present in all soil samples, reaching values higher than those described for soils so far in the literature. A significant decrease for AMPA was observed only between the secondary forest and the farm's middle slope for site B. GLY and AMPA were observed respectively at peak concentrations of 66.38 and 26.03 mg/kg soil. GLY was strongly associated with forest soil properties, while AMPA associated more with no-tillage soil properties. Soil texture was a significant factor contributing to discrimination of the results as clay and sand contents affect GLY and AMPA retention in soils. This was the first study to report DDT and metabolites in consolidated no-tillage soils in Brazil (a pesticide fully banned since 2009). Based on human risk assessment conducted herein and the potential risk of GLY to local soil communities, this study offers a baseline for future studies on potential adverse effects on soil biota, and mechanistic studies.

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Accumulation and fate processes of organochlorine pesticides (OCPs) in soil profiles in Mt. Shergyla, Tibetan Plateau: A comparison on different forest types

Cited by 27 publications

References 53 publications

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Organochlorine Pesticides in Karst Soil: Levels, Distribution, and Source Diagnosis

Seasonal Variation of Legacy Organochlorine Pesticides (OCPs) From East Asia to the Arctic Ocean

Pesticides in a case study on no-tillage farming systems and surrounding forest patches in Brazil

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