Spatial distribution of and historical changes in heavy metals in the surface seawater and sediments of the Beibu Gulf, China

Lao, Qibin; Su, Qizhong; Liu, Guoqiang; Shen, Youli; Chen, Fajin; Lei, Xuetie; Qing, Shangmin; Chun-lei, Wei; Zhang, Chunhua; Gao, Jian

doi:10.1016/j.marpolbul.2019.06.080

Cited by 116 publications

(66 citation statements)

References 30 publications

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“…To study the impact of rapid industrialization and urbanization in Guangxi Province on the coastal environment in recent years, seven metals (Hg, Cu, Pb, Cd, Cr, Zn and As) were investigated in the surface seawater and sediments of the northern Beibu Gulf. The study observed higher concentrations of metals nearshore area, particularly in the northwest, which may be related to the rapid industrial development in coastal areas [23]. Another study monitored the seasonal variation of heavy metals in surface water of a tropical mountainous river in Kerala, India [24].…”

Section: Introductionmentioning

confidence: 92%

Spatial and temporal distribution and contamination assessment of heavy metal in Woji Creek

Dibofori-Orji¹,

Ihunwo

Udo

et al. 2019

Environ. Res. Commun.

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Land use is one major factor that affects river water quality which is related to anthropogenic activities. Studies have shown that abandoned boats on watershed, petroleum and untreated wastewater from abattoirs can lead to anthropogenic pollution in surface waters. This study, therefore, was designed to assess spatial and temporal variation of selected heavy metals and level of pollution in Woji Creek. The study was carried out in the months of August, September and October 2018. Water samples were collected from five stations along the creek over a 3.2 km stretch. Water was collected to be analysed for heavy metals (Nickel, Cadmium, Copper, Lead and Iron). Results were subjected to ANOVA and heavy metal pollution index (HPI) was calculated using aquatic toxicity reference values (TRV) as threshold values. Heavy metal dominance in Woji was in the order of Pb>Ni>Fe>Cd>Cu. In the river, Ni had mean values ranging from 0.379±0.259 mg l −1 in August to 0.545±0.369 in October, while Pb with the highest concentration had mean values ranging from 0.229±0.333 mg l −1 in October to 1.534±0.103 mg l −1 in September. Concentrations of metals analysed were high than the TRV. Temporal analysis of HPI calculated for the study was above the critical heavy metal pollution index (100) (August=329.358, September=361.796, October=112.715). A correlation was observed between heavy metals analysed during the study. Spatial analysis of HPI showed higher pollution level at Station 3 with the highest anthropogenic activity along the creek. Cu showed a negative correlation to other metals analysed. Sources of pollution on this creek was identified to be both natural and majorly anthropogenic sources. This study, therefore, points out the need for proper environmental management as regards commercial activities around the waterways.

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Section: Introductionmentioning

confidence: 92%

Spatial and temporal distribution and contamination assessment of heavy metal in Woji Creek

Dibofori-Orji¹,

Ihunwo

Udo

et al. 2019

Environ. Res. Commun.

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“…Pollution assessments of HMs in sediments have been carried out widely based on several ecological risk indices, such as the Nemerow pollution index, E i r , RI, and I geo [20,35,43,51]. The Nemerow pollution index was used to assess HM pollution in sediments over different years.…”

Section: Pollution Assessment Of Hms In Sedimentsmentioning

confidence: 99%

Characteristics of Heavy Metals in Seawater and Sediments from Daya Bay (South China): Environmental Fates, Source Apportionment and Ecological Risks

Tao

Peng

et al. 2021

Sustainability

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In this study, the spatiotemporal distributions, potential sources, and ecological risks of Hg, Cr, and As in seawater, and Hg, As, Zn, Cd, Pb, and Cu in sediments from Daya Bay were investigated. The five-year average concentrations of Hg, Cr, and As in seawater were 0.020 μg/L, 0.79 μg/L, and 2.08 μg/L, respectively. The five-year average concentrations of Hg, As, Zn, Cd, Pb, and Cu in surface sediments were 0.04 mg/kg, 7.34 mg/kg, 63.81 mg/kg, 0.23 mg/kg, 25.60 mg/kg, and 11.78 mg/kg, respectively. Annual variations in Hg, Cr, and As in seawater exhibited different trends. HMs in sediments, such as As, Zn, Pb, and Cu, exhibited similar annual variations, whereas Hg and Cd exhibited different annual variations. The spatial distribution of metal species in seawater and sediments showed significant variability, and the concentrations decreased gradually from the coast to the open sea. The comprehensive potential ecological hazard index (RI) of HMs in sediments indicated a relatively high risk, especially for Hg and Cd contamination. The geoaccumulation indices (Igeo) of As, Zn, Pb, and Cu suggested that these metals did not pollute Daya Bay, whereas those of Cd and Hg indicated mild and moderate pollution. The environmental fates of HMs were discussed based on Pearson correlation analysis, revealing that concentrations of HMs were greatly affected by parameters, such as pH, salinity, dissolved oxygen (DO), and total organic carbon (TOC). Principal component and factor analyses indicated that Hg, Cr, As, and dissolved inorganic nitrogen (DIN) in water originated from similar sources, including domestic sewage and wastewater from fishing ports, runoffs, and outlets. For sediments, it was proposed that Cu, Zn, As, Pb, and TOC exhibited similar sources, including cage culture and waste discharge from outlets. Meanwhile, Hg and Cd originated from other point sources, such as a harbor. The study suggests that sustainable management and economic development be integrated to control pollutant emissions in Daya Bay.

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“…However, the results of the one-way analysis of variance showed that there was no significant difference in the concentrations of heavy metals from 1988 to 2020 (p > 0.05), which seems to indicate that the contribution of nuclear power plants sources to the contents of heavy metals in the sediment is limited. Compared with other bays along the coast of China, the levels of heavy metal concentration in Daya Bay were slightly higher than Beibu Gulf [20], but lower than Liaodong Bay, Bohai Bay, Jiaozhou Bay, Zhoushan Bay, and Quanzhou Bay [31][32][33][34][35]. Table 3 lists the overall heavy metal concentrations of 20 organism species collected in Daya Bay.…”

Section: Heavy Metal Concentrations In Sedimentsmentioning

confidence: 99%

“…The index I geo has been widely used to assess heavy metal contamination in sediment and soil [19,20]. The I geo values were calculated by using the following equation:…”

Section: Assessment Of Sediment Contaminationmentioning

confidence: 99%

Biological Risk Assessment of Heavy Metals in Sediments and Health Risk Assessment in Marine Organisms from Daya Bay, China

Kuang

Rao

et al. 2020

JMSE

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The concentrations of heavy metals in sediments and marine organisms in Daya Bay were investigated, and the Monte Carlo method was used to analyze the uncertainty of the results of geo-accumulation characteristics and ecological and health risks. The mean concentrations of metal elements in sediments were in the following order: Zn > Cr > Cu > As > Cd > Hg, while those in marine organisms were Zn > Cu > As > Cr ≈ Cd > Hg. The geo-accumulation index (Igeo) indicated that the primary pollutant was Hg, with 5.46% moderately polluted, and 39.52% for unpolluted to moderately polluted. Potential ecological risks (RI) were between low and high risks, and the contributions of Hg, Cd, and As to ecological risks were 50.85%, 33.92%, and 11.47%, respectively. The total hazard coefficients (THQ) were less than 1, but on the basis of total carcinogenic risks (TCR), the probability of children and adults exceeded the unacceptable risk threshold of 22.27% and 11.19%, respectively. Sensitivity analysis results showed that the concentrations of carcinogenic elements contributed to risk in the order of As > Cd > Cr. Therefore, in order to effectively control heavy metals contamination in Daya Bay, it is necessary to strengthen the management of Hg, Cd, and As emissions.

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Spatial distribution of and historical changes in heavy metals in the surface seawater and sediments of the Beibu Gulf, China

Cited by 116 publications

References 30 publications

Spatial and temporal distribution and contamination assessment of heavy metal in Woji Creek

Spatial and temporal distribution and contamination assessment of heavy metal in Woji Creek

Characteristics of Heavy Metals in Seawater and Sediments from Daya Bay (South China): Environmental Fates, Source Apportionment and Ecological Risks

Biological Risk Assessment of Heavy Metals in Sediments and Health Risk Assessment in Marine Organisms from Daya Bay, China

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