Anthropogenic Activities Have Contributed Moderately to Increased Inputs of Organic Materials in Marginal Seas off China

Liu, Liang‐Ying; Wei, Gaoling; Wang, Jizhong; Guan, Yanlong; Wong, Charles S.; Wu, Fengchang; Zeng, Eddy Y.

doi:10.1021/es401751k

Cited by 23 publications

(4 citation statements)

References 46 publications

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Section: Resultsmentioning

confidence: 99%

“…Previous studies have demonstrated that environmental changes caused by anthropogenic activities are recorded in marine sediment as chemical residues are buried by depositional processes [Lima et al, 2003;Guo et al, 2006;Liu et al, 2013]. Liu et al [2012b] reconstructed the evolution of anthropogenic activities in mainland China by characterizing PAHs in sediment cores from the YS and South China Sea.…”

Section: Anthropogenic Impactsmentioning

confidence: 99%

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Distribution pattern and mass budget of sedimentary polycyclic aromatic hydrocarbons in shelf areas of the Eastern China Marginal Seas

et al. 2017

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This study conducted the first extensive and comprehensive investigation of the regional‐scale sedimentary polycyclic aromatic hydrocarbons (PAHs) concentration, flux, and budget in the continental shelves of the Eastern China Marginal Seas (ECMSs). Surface sediment samples from multiple sites were collected and assessed, and the latest data from current research were assessed. The spatial distribution pattern of PAHs in the ECMSs was significantly influenced by the regional hydrodynamics, sediment properties (grain‐size, total organic carbon [TOC] content, and sedimentation rate), and anthropogenic impacts. Relatively higher PAHs concentrations occurred in areas with fine‐grained sediment. Results of source apportionment found that the relative proportions of PAHs showed significant regional variation, mainly influenced by socioeconomic differences between north and south China. The PAHs burial flux in the study area ranged from 11.2 to 1308 ng cm−2 yr−1 with an average value of 101 ± 104 ng cm−2 yr−1. The area‐integrated sedimentary PAHs burial flux across the ECMSs was 494 t yr−1. A mass budget calculation revealed that riverine input and atmospheric deposition were the most significant sources contributing, 28.4% and 71.6%, respectively. The study demonstrated that net PAHs transportation occurs between the Bohai Sea (BS) and Yellow Sea (YS), with a flux of approximately 10.2 t yr−1. PAHs were also transported from YS to the East China Sea (ECS), due to water exchange between the YS and ECS. Additionally, substantial amounts of PAHs in the inner shelf of the ECS were transported out of the shelf area due to cross‐shelf plume.

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Section: Resultsmentioning

confidence: 99%

Section: Anthropogenic Impactsmentioning

confidence: 99%

Distribution pattern and mass budget of sedimentary polycyclic aromatic hydrocarbons in shelf areas of the Eastern China Marginal Seas

et al. 2017

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“…Due to rapid industrialization and urbanization, the coastal marine environments off China are subject to increased anthropogenic impacts (Huang et al, 2003;Cao and Wong, 2007;Hu et al, 2008;Luo et al, 2008;Ni et al, 2008). Previous studies on the occurrence of sediment n-alkanes (Liu et al, 2012a(Liu et al, , 2013b and polycyclic aromatic hydrocarbons (PAHs) (Liu et al, 2012b) indicated slight anthropogenic impacts on the entire continental shelf off China. In addition, marine sources were believed to contribute considerably to organic materials in the SCS, whereas long-range atmospheric transport was considered as an important input mode for terrestrial materials accumulated in Yellow Sea and the SCS (Liu et al, 2012a,b).…”

Section: Introductionmentioning

confidence: 99%

Tracking anthropogenic influences on the continental shelf of China with sedimentary linear alkylbenzenes (LABs)

Wei

Liu

Bao

et al. 2014

Marine Pollution Bulletin

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“…It has been found that n-alkanes are important components of organic pollutants in particulate matter and are mainly supplied through anthropogenic emissions such as vehicle exhausts, fossil fuel combustion, and biomass combustion (Liu et al, 2013) or through biogenic emissions such as from microorganisms and terrestrial plants (Simoneit et al, 1989;Rogge et al, 1993).…”

mentioning

confidence: 99%

Characteristics of particulate-bound n-alkanes indicating sources of PM2.5 in Beijing, China

Yang

Lei²,

Liu³

et al. 2022

Preprint

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Abstract. The characteristics of n-alkanes and the contributions of various sources of fine particulate matter (PM2.5) in the atmosphere in Beijing were investigated. PM2.5 samples were collected at Minzu University of China between November 2020 and October 2021, and n-alkanes in the samples were analyzed by gas chromatography mass spectrometry. A positive matrix factorization analysis model and source indices (the main carbon peaks, carbon preference indices, and plant wax contribution ratios) were used to identify the sources of n-alkanes, determine the contributions of different sources, and explain the differences. The n-alkane concentrations were 4.51–153 ng/m, (mean 32.7 ng/m3), and the particulate-bound n-alkane and PM2.5 concentrations varied in parallel. There were marked seasonal and diurnal differences in the n-alkane concentrations (p<0.01). The n-alkane concentrations in the different seasons decreased in the order winter>spring>summer>fall. The mean concentration of each homolog was higher at night than in the day in all seasons. Particulate-bound n-alkanes were supplied by common anthropogenic and biogenic sources, and fossil fuel combustion was the dominant contributor. The positive matrix factorization model results indicated five sources of n-alkanes in PM2.5, which were coal combustion, diesel vehicle emissions, gasoline vehicle emissions, higher plants, and dust. Vehicle emissions were the main sources of n-alkanes, contributing 57.6 %. The sources of PM2.5 can be indicated by n-alkanes (i.e., using n-alkanes as organic tracers). Air quality in Beijing needs to be improved. Vehicle exhausts strongly affect PM2.5 pollution. Controlling vehicle exhaust emissions is key to controlling n-alkane and PM2.5 pollution in Beijing.

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Anthropogenic Activities Have Contributed Moderately to Increased Inputs of Organic Materials in Marginal Seas off China

Cited by 23 publications

References 46 publications

Distribution pattern and mass budget of sedimentary polycyclic aromatic hydrocarbons in shelf areas of the Eastern China Marginal Seas

Distribution pattern and mass budget of sedimentary polycyclic aromatic hydrocarbons in shelf areas of the Eastern China Marginal Seas

Tracking anthropogenic influences on the continental shelf of China with sedimentary linear alkylbenzenes (LABs)

Characteristics of particulate-bound n-alkanes indicating sources of PM2.5 in Beijing, China

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