Does an analysis of polychlorinated biphenyl (PCB) distribution in mountain soils across China reveal a latitudinal fractionation paradox?

Zheng, Qing‐Shui; Nizzetto, Luca; Mulder, Marie D.; Sáňka, Ondřej; Lammel, Gerhard; Li, Jun; Bing, Haijian; Liu, Xin; Jiang, Yishan; Luo, Chao; Zhang, Gan

doi:10.1016/j.envpol.2014.08.021

Cited by 28 publications

(23 citation statements)

References 35 publications

(46 reference statements)

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“…To collect forest soils, thirty mountainous sites were chosen across China, as details has been described previously 64 . Briefly, on the basis of altitudinal gradients and type of ecosystem, one to four sampling locations were marked at each mountainous sampling site.…”

Section: Methodsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons (PAHs) in Chinese forest soils: profile composition, spatial variations and source apportionment

Syed

Iqbal

Zhong

et al. 2017

Sci Rep

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Previous studies reported that forest ecosystems can play a vital role in scavenging anthropogenic polycyclic aromatic hydrocarbons (PAHs) and act as primary reservoirs of these environmental pollutants. The present study aimed to investigate the occurrence, spatial pattern and source apportionment of PAHs across Chinese background forest soils (O- & A-horizons). The 143 soils collected from 30 mountains showed significantly (p < 0.05) higher levels of ∑15PAHs (ng g−1 dw) in O-horizon (222 ± 182) than A-horizon (168 ± 161). A progressive increase in the levels of lighter PAHs was observed along altitudinal gradient, however heavier PAHs did not show any variations. Carbon contents (TOC & BC) of forest soils were found weakly correlated (p < 0.01) with low molecular weight (LMW)-PAHs but showed no relation with high molecular weight (HMW)-PAHs. Source apportionment results using PMF and PCA revealed that PAHs in forest soils mainly come from local biomass burning and/or coal combustion and attributed that forest soils may become a potential sink for PAHs in the region.

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Section: Methodsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons (PAHs) in Chinese forest soils: profile composition, spatial variations and source apportionment

Syed

Iqbal

Zhong

et al. 2017

Sci Rep

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“…They were subsequently freezedried, sieved through a steel mesh, ground with agate mortar, and stored at À18 C until further analyses. Further details of sample treatment and TOC analysis can be found elsewhere (Zheng et al, 2014).…”

Section: Samplingmentioning

confidence: 99%

Polychlorinated naphthalenes (PCNs) in Chinese forest soil: Will combustion become a major source?

Yue

Zheng

Pan

et al. 2015

Environmental Pollution

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“…22,24,47 To examine soil absorption of PAHs in the TNRSF, a field campaign was conducted to measure soil levels of the selected PAHs inside and outside the TNRSF. Compared with bare soil, forest soil with higher organic carbon has a higher absorption of OCs.…”

Section: Field and Model Evidence The Global Distribution Ofmentioning

confidence: 99%

“…28 Abundant observational evidence has revealed higher concentrations of OCs in forest soils than nearby treeless soils. 24,29−31 However, almost all previous studies in the associations between OCs environmental cycling and forests canopies were conducted in natural forests under a steady state 32 and have no significant changes in leaf area, SOC, and forest biomass for a long-term period. Since increasing forest biomass and carbon storage across China has been largely attributed to artificial forestation, 33−36 the significant land-use change induced by the TNRSF provide a unique opportunity to elucidate the impact of large scale artificial land-use change on the environmental fate of OCs.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Large-Scale Land-Use Change on the Uptake of Polycyclic Aromatic Hydrocarbons in the Artificial Three Northern Regions Shelter Forest Across Northern China

Huang

Zhang

Ling

et al. 2016

Environ. Sci. Technol.

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This study quantifies the influence of large-scale land-use change induced by the artificial Three-Northern Regions Shelter Forest (TNRSF) across northern China on the environmental cycling of organic chemicals. Atmospheric removal and long-term trends of two polycyclic aromatic hydrocarbon (PAH) species, phenanthrene (PHE) and benzo[a]pyrene (BaP), resulting from increasing vegetation coverage and soil organic carbon in the TNRSF over the last two decades were examined. Field sampling data and modeling result showed that the total atmospheric removal of PHE by TNRSF increased from 36.4 tons in 1990 to 76.8 tons in 2010, increasing at a rate of 5.6% yr −1 , and BaP from 2.2 to 4.5 tons, increasing at a rate of 5.2% yr −1 . Three model scenarios were designed to distinguish the effects of atmospheric emissions, and with and without TNRSF on the environmental fate of PAHs. Approximately 1−4% of PHE and BaP emitted in northern China were removed by the TNRSF during 1990−2010. Model simulations revealed that the TNRSF enhanced atmospheric removal of PHE by 29% and BaP by 53% compared with the simulation without the TNRSF, manifesting marked contributions of land-use change by the artificial TNRSF, the largest afforestation activity in human history, to the atmospheric removal of organic chemicals.

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Does an analysis of polychlorinated biphenyl (PCB) distribution in mountain soils across China reveal a latitudinal fractionation paradox?

Cited by 28 publications

References 35 publications

Polycyclic aromatic hydrocarbons (PAHs) in Chinese forest soils: profile composition, spatial variations and source apportionment

Polycyclic aromatic hydrocarbons (PAHs) in Chinese forest soils: profile composition, spatial variations and source apportionment

Polychlorinated naphthalenes (PCNs) in Chinese forest soil: Will combustion become a major source?

Impacts of Large-Scale Land-Use Change on the Uptake of Polycyclic Aromatic Hydrocarbons in the Artificial Three Northern Regions Shelter Forest Across Northern China

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