Speciation of Metals and Assessment of Contamination in Surface Sediments from Daya Bay, South China Sea

Yang, Jie; Cao, Linglong; Wang, Jianhua; Liu, Chunlian; Huang, Caihong; Cai, Weixu; Fang, Hongda; Peng, Xiaojuan

doi:10.3390/su6129096

Cited by 30 publications

(13 citation statements)

References 19 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…En los sedimentos, los metales presentes como iones intercambiables y precipitados como carbonatos o adsorbidos en ellos son liberados fácilmente como iones libres durante el proceso de intercambio iónico, debido a pequeños cambios ambientales (potencial redox, salinidad, removilización por corrientes, remoción de los sedimentos por organismos), o al descender el pH de los sedimentos; en consecuencia, son los más biodisponibles porque pueden introducirse fácilmente en las membranas de los organismos y se relacionan con contaminación antrópica, por ello se consideran en el CRA (Ahdy y Youssef 2011, Hu et al 2013, Yang et al 2014. De acuerdo con este criterio, el saco del golfo de Cariaco no presenta riesgo ambiental referente a Fe, Cd, y Pb.…”

Section: Discussionunclassified

Evaluación Del Riesgo Ambiental De Metales Pesados en Los Sedimentos Superficiales Del Saco Del Golfo De Cariaco

Hernández¹,

Gamboa

Astudillo³

2019

Rev. Int. Contam. Ambie.

View full text Add to dashboard Cite

Palabras clave: factor de enriquecimiento, índice de geoacumulación, probabilidad tóxica RESUMEN El objetivo de esta investigación fue evaluar la potencialidad de algunos metales pesados para provocar daños al ecosistema del golfo de Cariaco. Para ello se determinaron las concentraciones de los metales en los sedimentos y los índices de contaminación y riesgo ambiental. Además, se realizó una prueba de supervivencia con Artemia salina. Las concentraciones totales (µg/g) fueron: Cu (29-91, Χ-= 58), Cd (1.9-4.9, Χ-= 3.7), Cr (4-36, Χ-= 21), Ni (10-33, Χ-= 21), Pb (3-9, Χ-= 6) y Zn (32-112, Χ-= 75). Todas las concentraciones de metales fueron menores que los estándares de calidad de sedimentos marinos (SQS). En la fracción biodisponible, los metales mostraron concentraciones no tóxicas. El factor de enriquecimiento (FE) reveló incrementos por fuentes antrópicas en Zn, Cd y Cu. El índice de geoacumulación (Igeo) indicó contaminación por Cd. El código de riesgo ambiental (CRA) mostró que las concentraciones de Cd y Pb fueron inocuas; las de Cr, Cu y Ni entre inocuas y poco peligrosas, y las de Zn y Mn medianamente peligrosas. Finalmente, las concentraciones de Cd, Cu y Ni se ubicaron entre el intervalo de efectos bajos (ERL) y medios (ERM), y la potencialidad tóxica combinada (m-ERM-Q) fue baja (21 %). A pesar de esto, ningún ejemplar de Artemia salina tuvo efecto negativo en los extractos sedimentarios. Por tanto, el ecosistema se considera saludable, condición favorecida por sedimentos muy finos y anóxicos que benefician la retención de metales.

show abstract

Section: Discussionunclassified

Evaluación Del Riesgo Ambiental De Metales Pesados en Los Sedimentos Superficiales Del Saco Del Golfo De Cariaco

Hernández¹,

Gamboa

Astudillo³

2019

Rev. Int. Contam. Ambie.

View full text Add to dashboard Cite

show abstract

“…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.…”

mentioning

confidence: 99%

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

Tang

Yan

et al. 2018

Water

View full text Add to dashboard Cite

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.

show abstract

“…Marine sediment contains metal ions in several different types of physicochemical fractions that function as reservoirs of metals. High contents of heavy metals in coastal sediments may result from several anthropogenic activities, such as industrial and urban effluents [4]. In addition, natural processes, such as rocks weathering and physical migration and transportation also play a noticeable role in the abundance of metals in environments.…”

Section: Introductionmentioning

confidence: 99%

Multivariate Analyses and Evaluation of Heavy Metals by Chemometric BCR Sequential Extraction Method in Surface Sediments from Lingdingyang Bay, South China

Cao¹,

Tian²,

Yang³

et al. 2015

Sustainability

Self Cite

View full text Add to dashboard Cite

Sediments in estuary areas are recognized as the ultimate reservoirs for numerous contaminants, e.g., toxic metals. Multivariate analyses by chemometric evaluation were performed to classify metal ions (Cu, Zn, As, Cr, Pb, Ni and Cd) in superficial sediments from Lingdingyang Bay and to determine whether or not there were potential contamination risks based on the BCR sequential extraction scheme. The results revealed that Cd was mainly in acid-soluble form with an average of 75.99% of its total contents and thus of high potential availability, indicating significant anthropogenic sources, while Cr, As, Ni were enriched in the residual fraction which could be considered as the safest ingredients to the environment. According to the proportion of secondary to primary phases (KRSP), Cd had the highest bioavailable fraction and represented high or very high risk, followed by Pb and Cu with medium risks in most of samples. The combined evaluation of the Pollution Load Index (PLI) and the mean Effect Range Median Quotient (mERM-Q) highlighted that the greatest OPEN ACCESSSustainability 2015, 7 4939 potential environmental risk area was in the northwest of Lingdingyang Bay. Almost all of the sediments had a 21% probability of toxicity. Additionally, Principal Component Analysis (PCA) revealed that the survey region was significantly affected by two main sources of anthropogenic contributions: PC1 showed increased loadings of variables in acid-soluble and reducible fractions that were consistent with the input from industrial wastes (such as manufacturing, metallurgy, chemical industry) and domestic sewages; PC2 was characterized by increased loadings of variables in residual fraction that could be attributed to leaching and weathering of parent rocks. The results obtained demonstrated the need for appropriate remediation measures to alleviate soil pollution problem due to the more aggregation of potentially risky metals. Therefore, it is of crucial significance to implement the targeted strategies to tackle the contaminated sediments in Lingdingyang Bay.

show abstract

Speciation of Metals and Assessment of Contamination in Surface Sediments from Daya Bay, South China Sea

Cited by 30 publications

References 19 publications

Evaluación Del Riesgo Ambiental De Metales Pesados en Los Sedimentos Superficiales Del Saco Del Golfo De Cariaco

Evaluación Del Riesgo Ambiental De Metales Pesados en Los Sedimentos Superficiales Del Saco Del Golfo De Cariaco

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

Multivariate Analyses and Evaluation of Heavy Metals by Chemometric BCR Sequential Extraction Method in Surface Sediments from Lingdingyang Bay, South China

Contact Info

Product

Resources

About