Analysis of Historical Sources of Heavy Metals in Lake Taihu Based on the Positive Matrix Factorization Model

Li, Yan; Mei, Li-Ping; Zhou, Shenglü; Wang, Junxiao; Li, Baojie; Wang, Chunhui; Wu, Shishan

doi:10.3390/ijerph15071540

Cited by 23 publications

(15 citation statements)

References 37 publications

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“…However, in the 21st century the atmospheric heavy metals remained at a relatively high level and this status likely continued or may even have become worse in the following years until the government carried out new stricter management standards for the atmospheric environment. Lei et al [16,43,44,45] studied the historical changes of pollutant concentrations in the sediments of Eastern Taihu, Changjiang, and Liaodong Bay and considered that 2000 was the turning point of the environmental quality change. This trend is basically consistent with the results of this paper.…”

Section: Discussionmentioning

confidence: 99%

Influence of Industrialization and Environmental Protection on Environmental Pollution: A Case Study of Taihu Lake, China

Zhou

et al. 2018

IJERPH

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In order to quantitatively study the effect of environmental protection in China since the twenty-first century and the environmental pollution projected for the next ten years (under the model of extensive economic development), this paper establishes a Bayesian regulation back propagation neural network (BRBPNN) to analyze the typical pollutants (i.e., cadmium (Cd) and benzopyrene (BaP)) for Taihu Lake, a typical Chinese freshwater lake. For the periods 1950–2003 and 1950–2015, the neural network model estimated the BaP concentration for the database with Nash-Sutcliffe model efficiency (NS) = 0.99 and 0.99 and root-mean-square error (RMSE) = 3.1 and 9.3 for the total database and the Cd concentration for the database with NS = 0.93 and 0.98 and RMSE = 45.4 and 65.7 for the total database, respectively. In the model of extensive economic development, the concentration of pollutants in the sediments of Taihu reached the maximum value at the end of the twentieth century and early twenty-first century, and there was an inflection point. After the early twenty-first century, the concentration of pollutants was controlled under various environmental policies and measures. In 2015, the environmental protection ratio of Cd and BaP reached 52% and 89%, respectively. Without environmental protection measures, the concentrations of Cd and BaP obtained from the neural network model is projected to reach 2015.5 μg kg−1 and 407.8 ng g−1, respectively, in 2030. Based on the results of this study, the Chinese government will need to invest more money and energy to clean up the environment.

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Section: Discussionmentioning

confidence: 99%

Influence of Industrialization and Environmental Protection on Environmental Pollution: A Case Study of Taihu Lake, China

Zhou

et al. 2018

IJERPH

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“…Factor 3 was mainly dominated by As. Many previous studies attributed the source of As to agricultural input [36,57], and considered that the use of pesticides and chemical fertilizers leads to the enrichment of As [36]. However, the study area has been used as industrial land for more than 60 years, and most of the surrounding land was industrial land.…”

Section: Pollution Sourcesmentioning

confidence: 99%

Evaluating Metal(loid)s Contamination in Soil of a Typical In-Dustry Smelting Site in South Central China: Levels, Possible Sources and Human Health Risk Analysis

Liu

et al. 2021

Sustainability

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Soil pollution by metal(loid)s caused by smelting activities is a severe problem posing a great threat to environmental and human health. In this study, the concentrations, sources and human health risks posed by six potentially toxic elements (Cr, Mn, Zn, Pb, Cd, and As) were determined in the soil of a typical alloy smelting site in South Central China. The results showed that the concentrations of metal(loid)s were in the descending order of Mn > Cr > Zn > Pb > As > Cd. Additionally, the selected elements were classified into different pollution degrees using geo-accumulation index and pollution load index. The entire study area had a high pollution level with relatively severe and extensive contamination by Cr, Cd, and Mn. The combined application of principal component analysis and positive matrix decomposition model revealed that the major sources of these elements include smelting activities (48.68%), waste residue stacking (22.95%), and natural sources (28.37%). According to the results of the human health risk assessment, the non-carcinogenic risk was insignificant as a whole; however, the carcinogenic risk had an unacceptable level. Among them, Cr was the main driver of carcinogenic risk, which needs special attention.

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“…Wastewater discharges from industrial sources need to be monitored and prevented more effectively here (Wenchuan et al 2001). In addition, non-point source pollution arising from aquaculture and agriculture need to be paid attention to (Li et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Heavy Metals in Typical River Sediments on the West Bank of Taihu Lake, China

Wang¹,

Ren²,

Yang³

et al. 2021

Preprint

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In this study, nine heavy metals (Cd, Cr, As, Hg, Pb, Cu, Ni, Be, Sb) in typical river sediments of Wujin and Yixing, two cities on the west bank of Taihu Lake, were determined. Variety of statistical methods were applied to analyze the distribution, sources, pollution status and the potential ecological risk of these metals. The results showed that the mean concentrations for most of the heavy metals in sediments exceeded their local background values, except for Hg and Be. Geoaccumulation index (Igeo) and potential ecological risk index (RI) analysis showed the partially serious contaminated status and strong potential ecological risk for Cd in most sites. The highest contamination level was observed in the estuary of Taihu Lake and most of the sediment samples were polluted and under risk. Principal component analysis (PCA), Cluster analysis (CA) and correlation analysis demonstrated that Ni, Sb, Cr and Cu were controlled by industrial sources, whereas the other metals appeared to be influenced by complex origins including industrial, agricultural and natural sources.

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Analysis of Historical Sources of Heavy Metals in Lake Taihu Based on the Positive Matrix Factorization Model

Cited by 23 publications

References 37 publications

Influence of Industrialization and Environmental Protection on Environmental Pollution: A Case Study of Taihu Lake, China

Influence of Industrialization and Environmental Protection on Environmental Pollution: A Case Study of Taihu Lake, China

Evaluating Metal(loid)s Contamination in Soil of a Typical In-Dustry Smelting Site in South Central China: Levels, Possible Sources and Human Health Risk Analysis

Characterization of Heavy Metals in Typical River Sediments on the West Bank of Taihu Lake, China

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