Heavy-metal pollution and potential ecological risk assessment of sediments from Baihua Lake, Guizhou, P.R. China

Huang, Xianfei; Hu, Jiwei; Li, Cunxiong; Deng, Jia-jun; Long, Jian; Fanxin, Qin

doi:10.1080/09603120902795598

Cited by 65 publications

(39 citation statements)

References 20 publications

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“…Accordingly, characterization of the sediment quality is crucial prior to dredging to ensure that unnecessary costs are not incurred and that there is limited environmental impact and public acceptance [38]. Unfortunately, it was not possible to obtain comprehensive information regarding the characteristics of the lake sediments in Lake Hongfeng due to its depth and location in a Karst landform [39]. Moreover, Liu et al [40] reported that sediment dredging would cause a temporary risk of water quality deterioration in Lake Taihu.…”

Section: Methods Of Controlling the Release Of Phosphorus From The Sementioning

confidence: 99%

Application of chemical fractionation and X-ray powder diffraction to study phosphorus speciation in sediments from Lake Hongfeng, China

Jiang

et al. 2011

Chin. Sci. Bull.

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Based on the techniques of sequential extraction and X-ray powder diffraction (XRD), the distribution characteristics of phosphorus speciation were investigated in 13 sediment samples from Lake Hongfeng, an important drinking water source for Guiyang with a typical karstic limestone environment. The total phosphorus (TP) concentrations in the sediments ranged from 973.36 to 2334.18 mg/kg with a mean concentration of 1635.87 mg/kg (dry weight), and it was evident that the phosphorus level in the sediments was high compared with other eutrophic lakes such as Lake Chaohu and Lake Xihu. The results of the two methods, sequential extraction and XRD, demonstrated the presence of different phosphorus species in the lake sediments. Being compatible with local geophysical characteristics, the results of sequential extraction techniques indicate that the average percentages of dissolved phosphorus (DP), aluminum-bound phosphorus (Al-P), iron-bound phosphorus (Fe-P), calcium-bound phosphorus (Ca-P) and organic phosphorus (OP) in the sediments were 0.40%, 7.06%, 5.07%, 45.48% and 38.49%, respectively. Notably, the concentrations of inorganic phosphorus (IP) were higher than those of OP, and the IP consisted primarily of Ca-P. The high concentrations of Ca-P may temporarily control the release of phosphorus from the sediments because it is a relatively stable, inert and non-bioavailable phosphorus fraction. The results of XRD analysis indicated that, among phosphorus species, AlPO 4 was found in all sediment samples at relatively high concentrations. Moreover, the TP concentrations in the sediments were high; thus the release potential and bioavailability of phosphorus in the sediments was important. Further statistical analyses of the results revealed significant correlations between phosphorus species in the sediments with two extractable principal components and four selectable cluster levels allowing interpretation of possible origins of phosphorus loading and transformation mechanisms of phosphorus species. Furthermore, available remediation measures were briefly assessed for the lake while considering its distinct environmental features. eutrophication, karstic environment, lake sediments, phosphorus speciation, sequential extraction procedure, X-ray powder diffraction Citation:Jiang C H, Wu D, Hu J W, et al. Application of chemical fractionation and X-ray powder diffraction to study phosphorus speciation in sediments from Lake Hongfeng, China. Chinese Sci Bull, 2011Bull, , 56: 2098Bull, −2108Bull, , doi: 10.1007 Lake Hongfeng (E 106°24′-106°43′, N 26°31′-26°34′) is located about 32 km west of Guiyang, the capital of Guizhou Province, in southwestern China. The local geology consists of typical karstic limestone terrain that is rich in phosphate rock deposits. The lake is the largest deep artificial reservoir on the Yunnan-Guizhou Plateau, with an *Corresponding author (email: jwhu@gznu.edu.cn) average water depth of 10.5 m (max. 45 m), a flood storage capacity of 6.01 × 10 8 m 3 and an area of 57.2 km 2 . It is a t...

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Section: Methods Of Controlling the Release Of Phosphorus From The Sementioning

confidence: 99%

Application of chemical fractionation and X-ray powder diffraction to study phosphorus speciation in sediments from Lake Hongfeng, China

Jiang

et al. 2011

Chin. Sci. Bull.

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“…Due to large-scale production and consumption and lack of regulations, heavy metals such as lead (Pb), zinc (Zn), cadmium (Cd), mercury (Hg), and chromium (Cr) are emitted into the environment in large quantities through wastewater irrigation, solid waste disposal, sludge application, vehicular exhaust and atmospheric deposition [8]. As a result, heavy metals are present in industrial, municipal and urban runoff, and they continuously accumulate in the environment in China [9,10,11,12,13]. Since 2005, health related incidents caused by heavy metal pollution have risen sharply in China, with major accidents attracting nationwide attention [14].…”

Section: Introductionmentioning

confidence: 99%

Human Exposure Pathways of Heavy Metals in a Lead-Zinc Mining Area, Jiangsu Province, China

Qu¹,

Ma²,

Yang³

et al. 2014

Heavy Metal Contamination of Water and Soil

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Heavy metal pollution is becoming a serious issue in developing countries such as China, and the public is increasingly aware of its adverse health impacts in recent years. We assessed the potential health risks in a lead-zinc mining area and attempted to identify the key exposure pathways. We evaluated the spatial distributions of personal exposure using indigenous exposure factors and field monitoring results of water, soil, food, and indoor and outdoor air samples. The risks posed by 10 metals and the contribution of inhalation, ingestion and dermal contact pathways to these risks were estimated. Human hair samples were also analyzed to indicate the exposure level in the human body. Our results show that heavy metal pollution may pose high potential health risks to local residents, especially in the village closest to the mine (V1), mainly due to Pb, Cd and Hg. Correspondingly, the residents in V1 had higher Pb (8.14 mg/kg) levels in hair than those in the other two villages. Most of the estimated risks came from soil, the intake of self-produced vegetables and indoor air inhalation. This study highlights the importance of site-specific multipathway health risk assessments in studying heavymetal exposures in China.

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“…The constant, 1.5, allows us to analyze natural fluctuations in the content of a given substance in the environment, and to detect very small anthropogenic influences (Faiz et al 2009). (Wei 1990) b Metal contents in the Nam Co basin (Li et al 2009) c Metal contents of Tibetan top soils (Sheng et al 2012) The potential ecological risk index method of assessing the risk of heavy metals is the only method that considers both the content and toxic response factors of heavy metals, and is the most commonly employed (Huang et al 2009). The potential ecological risk index is calculated using the following equation (Li et al 2013):…”

Section: Methodsmentioning

confidence: 99%

Assessment of Heavy Metal Contents in Surface Soil in the Lhasa–Shigatse–Nam Co Area of the Tibetan Plateau, China

Xie

Zhang

et al. 2014

Bull Environ Contam Toxicol

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Eight important heavy metals (As, Cr, Cu, Ni, Pb, Zn, Mn, and Hg) were investigated in surface soil samples collected from the Lhasa-Shigatse-Nam Co region, Tibetan Plateau, China. The mean contents of As, Cr, Cu, Ni, Pb, Zn, Mn, and Hg in the samples were 39.5, 57.4, 28.5, 48.2, 15.7, 79.2, 637 and 0.0175 mg/kg, respectively. All metals were divided into three clusters by cluster analysis. The results of geoaccumulation index indicated that no samples were polluted by Cr, Pb, Zn, and Mn, and samples were polluted with As, Cu, Ni, and Hg to different degrees. All surface soils had a low ecological risk with potential ecological risk index below 150, indicating a low ecological risk. As, Pb, and Hg were the primary contributors to potential ecological risk.

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Heavy-metal pollution and potential ecological risk assessment of sediments from Baihua Lake, Guizhou, P.R. China

Cited by 65 publications

References 20 publications

Application of chemical fractionation and X-ray powder diffraction to study phosphorus speciation in sediments from Lake Hongfeng, China

Application of chemical fractionation and X-ray powder diffraction to study phosphorus speciation in sediments from Lake Hongfeng, China

Human Exposure Pathways of Heavy Metals in a Lead-Zinc Mining Area, Jiangsu Province, China

Assessment of Heavy Metal Contents in Surface Soil in the Lhasa–Shigatse–Nam Co Area of the Tibetan Plateau, China

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