Chemical Forms of Pb, Zn and Cu in the Sediment Profiles of the Pearl River Estuary

Li, Xiangdong; Shen, Zhenguo; Wai, Onyx W. H.; Li, Yok-Sheung

doi:10.1016/s0025-326x(00)00145-4

Cited by 289 publications

(140 citation statements)

References 29 publications

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“…On the other hand, Pb probably arises from non-point sources, for instance, atmospheric deposition. These features can be reinforced by other related studies (Li et al, 2000a(Li et al, , 2001). …”

Section: Quantitative Evaluation Of Metal Enrichmentsupporting

confidence: 73%

“…The washing water was discarded. Metal concentrations in solutions were acidified with HNO 3 and measured using ICP-AES (ICP-AES, Perkin-Elmer Optima 3300DV; Li et al, 2000bLi et al, , 2001.…”

Section: Chemical Analysismentioning

confidence: 99%

“…Analysis of Pb stable isotopes in the sediment column can help to identify various sources of Pb in an estuary environment (Farmer et al, 1996;Munksgaard et al, 1998;Li et al, 2001). In general, the 206 Pb/ 207 Pb ratio can be used for assessing anthropogenic inputs of Pb in soils and sediments.…”

Section: Pb Isotope Compositions Of the Sedimentsmentioning

confidence: 99%

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Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Liu

Shen

et al. 2003

Environmental Pollution

372

157

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analysis identified the heavy metal accumulation layers of sediment profiles and showed the various sources of metals in the estuary. AbstractThe concentrations and chemical partitioning of heavy metals in the sediment cores of the Pearl River Estuary were studied. Based on Pearson correlation coefficients and principal component analysis results, Al was selected as the concentration normalizer for Pb, while Fe was used as the normalizing element for Co, Cu, Ni and Zn. In each profile, sections with metal concentrations exceeding the upper 95% prediction interval of the linear regression model were regarded as metal enrichment layers. The heavy metal accumulation mainly occurred at sites in the western shallow water areas and east channel, which reflected the hydraulic conditions and influence from riparian anthropogenic activities. Heavy metals in the enrichment sections were evaluated by a sequential extraction method for possible chemical forms in sediments. Since the residual, Fe/Mn oxides and organic/sulfide fractions were dominant geochemical phases in the enriched sections, the bioavailability of heavy metals in sediments was generally low. The 206 Pb/ 207 Pb ratios in the metal-enriched sediment sections also revealed the influence of anthropogenic sources. The spatial distribution of cumulative heavy metals in the sediments suggested that the Zn and Cu mainly originated from point sources, while the Pb probably came from non-point sources in the estuary. #

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Section: Quantitative Evaluation Of Metal Enrichmentsupporting

confidence: 73%

Section: Chemical Analysismentioning

confidence: 99%

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Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Liu

Shen

et al. 2003

Environmental Pollution

372

157

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“…The rapid industrialization and urbanization over the past three decades has brought significant environmental problems to the region, including widespread water pollution, photochemical smog, and soil and sediment pollution. Previous studies have observed significant enrichment of heavy metals in the surface sediments of the Pearl River Estuary (Li et al 2000(Li et al , 2001Liu et al 2003). There is a pressing need to assess the distributions of heavy metals in the surface soils, which serve as an important sink, to understand the overall status of heavy metal pollution and the associated ecological risk in the region.…”

Section: Introductionmentioning

confidence: 99%

Assessing heavy metal pollution in the surface soils of a region that had undergone three decades of intense industrialization and urbanization

Liu

Bai

et al. 2013

Environ Sci Pollut Res

464

158

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Heavy metals in the surface soils from lands of six different use types in one of the world's most densely populated regions, which is also a major global manufacturing base, were analyzed to assess the impact of urbanization and industrialization on soil pollution. A total of 227 surface soil samples were collected and analyzed for major heavy metals (As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn) by using microwave-assisted acid digestion and inductively coupled plasma-mass spectrometry (ICP-MS). Multivariate analysis combined with enrichment factors showed that surface soils from the region (>7.2×10 4 km 2 ) had mean Cd, Cu, Zn, and As concentrations that were over two times higher than the background values, with Cd, Cu, and Zn clearly contributed by anthropogenic sources. Soil pollution by Pb was more widespread than the other heavy metals, which was contributed mostly by anthropogenic sources. The results also indicate that Mn, Co, Fe, Cr, and Ni in the surface soils were primarily derived from lithogenic sources, while Hg and As contents in the surface soils were controlled by both natural and anthropogenic sources. The pollution level and potential ecological risk of the surface soils both decreased in the order of: urban areas>waste disposal/treatment sites∼industrial areas>agri-cultural lands∼forest lands>water source protection areas. These results indicate the significant need for the development of pollution prevention and reduction strategies to reduce heavy metal pollution for regions undergoing fast industrialization and urbanization.

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“…Hence, great concern has arisen in recent years over environmental pollution in this coastal region. Elevated concentrations of Cu, Pb, and Zn in the sediments of the PRE have been found (Chen and Zhou, 1992;Zheng, 1992;Li et al, 2000aLi et al, , 2000bLi et al, and 2001Liu et al, 2003). Trace metal contamination of the PRE may have a significant impact on aquatic organisms, disturbing the area's delicate ecological balance and potentially contaminating the marine food chain.…”

Section: Introductionmentioning

confidence: 99%

Heavy metal and Pb isotopic compositions of aquatic organisms in the Pearl River Estuary, South China

Zhang

et al. 2005

Environmental Pollution

166

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Chemical Forms of Pb, Zn and Cu in the Sediment Profiles of the Pearl River Estuary

Cited by 289 publications

References 29 publications

Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Multivariate statistical study of heavy metal enrichment in sediments of the Pearl River Estuary

Assessing heavy metal pollution in the surface soils of a region that had undergone three decades of intense industrialization and urbanization

Heavy metal and Pb isotopic compositions of aquatic organisms in the Pearl River Estuary, South China

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