Composition and sources of organic matter and its solvent extractable components in surface sediments of a bay under serious anthropogenic influences: Daya Bay, China

Gao, Xuelu; Chen, Shaoyong; Long, Aimin

doi:10.1016/j.marpolbul.2008.03.036

Cited by 27 publications

(9 citation statements)

References 57 publications

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“…Organic matter, total N, available P, Na, K, Ca, and Mg contents increased in soil treated with SS due to higher levels of these nutrients in SS. Organic matter plays a major role in maintaining soil quality and improves soil structure which can enhance infiltration rate and reduce soil erosion (Gao et al, 2008). The SS treatment in soil led to higher concentrations of HMs as compared to control soil.…”

Section: Discussionmentioning

confidence: 99%

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Elloumi

Belhaj

Jerbi

et al. 2017

Span. j. agric. res.

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The proposal to use sewage sludge (SS) on agricultural fields as a sustainable way to dispose of the waste is based on its high organic and nutrients content. However, the presence of heavy metals (HMs) in sludge can contaminate crops and accumulate in the food chain. The aim of this study was to assess changes in soil fertility, biochemical responses of tomato (Solanum lycopersicum L. cv. Rio Grande) seedlings and the availability of HMs with increased rate application of SS (0, 2.5, 5 and 7.5%). Leaf chlorophyll content, nutritional status, proline, membrane peroxidation, stomatal conductance and HM accumulation were investigated. Results showed that the soil pH decreased, whereas soil salinity, organic carbon, total N, available P and exchangeable Na, Ca, K and HM content increased significantly with increasing application rates of SS. Among the three HMs (Zn, Cu and Cr), Zn had the highest capacity for transferring from soil into plants. Low metal translocation was observed from roots to leaves. The 7.5% SS dose decreased biomass production and caused a decline in chlorophyll content and stomatal conductance. However, lipid peroxidation and proline contents increased. Therefore, the use of 2.5 and 5% doses of sewage sludge in agriculture would be an efficient and costeffective method to restore the fertility of soil and an environment-friendly solution for disposal problems.Additional key words: sewage sludge amendment; soil fertility; biochemical responses; Solanum lycopersicum.

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Section: Discussionmentioning

confidence: 99%

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Elloumi

Belhaj

Jerbi

et al. 2017

Span. j. agric. res.

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“…However, the results obtained for the C/N molar ratio did not indicate strong terrigenous input. Values were mostly below 12 and representative of mixed sources of marine and terrestrial organic matter (Emerson and Hedge 1988;Gao et al 2008). Previous studies in Boston Harbor (USA) and Jiaozhou Bay (China) sediments have shown that the C/N molar ratio can reach very high values (up to 86.5) due to anthropogenic influence and petroleum contamination (Wang et al 2001(Wang et al , 2006.…”

Section: Granulometry and Bulk Geochemical Parametersmentioning

confidence: 95%

Assessment and sources of nonaromatic hydrocarbons in surface sediments of three harbors in Santa Catarina State, Brazil

Oliveira

Madureira

2010

Environ Monit Assess

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Nonaromatic hydrocarbons and geochemical parameters from 17 sediment-water interface samples were used to assess sources of organic matter in three harbors, located in Santa Catarina State, southern Brazil. The evaluation was based on the molar C/N/P ratios, abundance of resolved nonaromatic hydrocarbons (3.0-25.9 μg g(-1)), unresolved complex mixture, and two indexes: the carbon preference index (CPI) and the low molecular weight to high molecular weight ratio. The results indicate that the organic matter is predominantly of terrestrial origin (C/N>10 and CPI>2). Variations in the total organic carbon from 0.43 to 2.98 mmol g(-1) and total phosphorus from 82.4 to 464.3 μg g(-1) showed no clear correlation with the silt and clay fractions of the sediments possibly due to anthropogenic input. In contrast to the low level of contamination based on the acyclic hydrocarbon distribution, the results obtained from a series of geologically stable hopanes and steranes reveal the presence of less degradable petroleum derivatives.

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“…The mean contents of Cu, Zn, As, Pb, Ni, Cd, Hg, and Cr in Daya Bay were approximately 1.6, 1.7, 0.8, 1.8, 1.3, 1.1, 2.6, and 1.8 times higher than their corresponding background values [31]. 1996, 1998, 2006, 2008a, 2008b, 2011 were referenced from [15,[20][21][22][23][24], respectively. Heavy metal concentrations from the present study were also compared with those of previous studies in Daya Bay surface sediments ( Figure 2).…”

Section: Mean Concentrations and Comparisonsmentioning

confidence: 99%

“…Comparison of mean concentrations of heavy metal in the present study in 2017 with those of previous years. Dataof 1996, 1998, 2006, 2008a, 2008b, 2011 were referenced from[15,[20][21][22][23][24], respectively.…”

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confidence: 99%

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

Tang

Yan

et al. 2018

Water

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Surface sediment samples were collected from 19 sites throughout Daya Bay, China to study the concentrations, spatial distributions, potential ecological risk, and possible sources of heavy, including metals copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), nickel (Ni), lead (Pb), mercury (Hg), and chromium (Cr). The mean concentrations of the eight heavy metals were 24, 109, 6.5, 0.09, 35.3, 26.8, 0.07, and 109 µg g −1 , respectively. The concentrations of most heavy metals were within range of those recorded in previous years. The spatial distribution pattern of most heavy metals were similar, with lowest values recorded along the southeast coast and the open sea area; the highest values were recorded in the northern Daya Bay, especially the northwest. Cu, Zn, As, Cd, Pb, and Hg were classified as Class I, and Ni and Cr were classified as Class II according to the Sediment Quality Guidelines (SQGs) of China. The potential ecological risk (E i f) indices of Cu, Zn, As, Pb, Ni, and Cr specify that these metals pose low risk to the ecosystem of the Bay, whereas Cd and Hg pose a very high risk in some sites. The geoaccumulation indices (I geo) of Cu, Zn, As, Ni, and Cr specify weak or no pollution in Daya Bay, whereas those of Pb, Cd, and Hg in some sites indicate moderate or even high pollution. Spatial distribution, carbon/nitrogen analysis, Pearson correlation, and principal components analysis indicated that Cu, Zn, As, Pb, Ni, Cr, total organic carbon (TOC), and total nitrogen (TN) originated from the same sources. Ballast water or sewage from the cargo ships that park at the harbors or anchor in the Bay were the important sources for Cu, Zn, As, Pb, Ni, Cr, TOC, and TN. Other anthropogenic sources, such as agricultural runoff and aquaculture, might also be responsible, whereas Hg and Cd originated from other point sources.

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Composition and sources of organic matter and its solvent extractable components in surface sediments of a bay under serious anthropogenic influences: Daya Bay, China

Cited by 27 publications

References 57 publications

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Effects of sewage sludge on bio-accumulation of heavy metals in tomato seedlings

Assessment and sources of nonaromatic hydrocarbons in surface sediments of three harbors in Santa Catarina State, Brazil

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

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