Historical trends in atmospheric metal(loid) contamination in North China over the past half-millennium reconstructed from subalpine lake sediment

Liang, Mengyao; Liu, Enfeng; Wang, Xiaoyu; Xu, Jingxian; Ji, Ming; Zhang, Enlou

doi:10.1016/j.envpol.2022.119195

Cited by 17 publications

(3 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The above environmental assessments suggest that the lakes received a large amount of heavy metals via regional atmospheric transport and deposition, although they are situated far from urban/industrial areas and were affected by limited human activities around them. This fits well with the previous conclusion that these lakes mainly received pollutants via regional atmospheric transport and deposition [ 23 , 25 , 27 , 29 , 42 ]. Hence, the different risks between metals were mainly related to atmospheric heavy metal emissions from anthropogenic sources in the region.…”

Section: Resultssupporting

confidence: 93%

“…For Hg, its background concentration (19.1 ± 2.2 µg kg −1 ) in GH is only half of that in MY (39.4 ± 1.8 µg kg −1 ). The large discrepancy in background Hg between the two lakes can also be found in another study by Liang et al (2022) [42]. Metal concentrations, except Hg, in the two lakes' background sediments are close to those in Shanxi background soil (Table 2).…”

Section: Heavy Metals In the Five Lakes' Present And Background Sedim...supporting

confidence: 80%

See 1 more Smart Citation

Uncertainties in Pollution and Risk Assessments of Heavy Metals in Lake Sediments Using Regional Background Soils in China

Wan

Gao

Song

et al. 2023

Toxics

View full text Add to dashboard Cite

Background soils are frequently utilized as a surrogate to assess pollution levels and environmental risks of heavy metals in Chinese lakes. However, there remains a lack of understanding regarding the reliability and uncertainty of such assessments. Here, we determined heavy metals (As, Cd, Co, Cr, Cu, Hg, Ni, Pb, and Zn) in sediment cores from five rural lakes in North China to evaluate the reliability and uncertainty of the assessments using background soils by comparing them with assessments based on background sediments. Comparative studies reveal large uncertainties in the assessments using background soils. Among these metals, uncertainties for Hg and Cd are relatively large, whereas those for the other metals are minor. This discrepancy is due to the considerably higher natural variability of Hg and Cd in soils and sediments in comparison to the other metals. Generally, assessments utilizing background soils underestimate pollution levels and risks of Hg but overestimate those of Cd in these lakes. Despite limited human activities around the lakes, they still received a considerable influx of heavy metals via regional atmospheric transport. Assessments of the nine metals indicate moderate to considerable ecological risks in these lakes. The risks are contributed primarily (78–89%) by Hg and Cd. This study underscores the substantial uncertainties in assessing heavy metal pollution and risks using regional background soils and emphasizes the importance of controlling atmospheric emissions of Hg and Cd to mitigate pollution in rural and remote water bodies in China.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Heavy Metals In the Five Lakes' Present And Background Sedim...supporting

confidence: 80%

Uncertainties in Pollution and Risk Assessments of Heavy Metals in Lake Sediments Using Regional Background Soils in China

Wan

Gao

Song

et al. 2023

Toxics

View full text Add to dashboard Cite

show abstract

“…In many lakes where long-term monitoring data is lacking or unavailable, studies of variation in contaminant concentrations in a dated sediment core can be used to trace the past ecological status of the lake [19], because lakes serve as sinks for different types of anthropogenic pollutants carried from various environmental sources [20][21][22][23], and in such depositional events, sediments become a source of chemical records which is utilised in the reconstruction or tracing of local pollution history [24][25][26][27][28]. Such information from reconstruction studies is vital to improving lake management plans and policy formation [29].…”

Section: Introductionmentioning

confidence: 99%

Past Metal(loid) Pollution Records Inferred from the Sediments of Bukit Merah Reservoir Perak, Malaysia

Akogwu¹,

Omar²,

Muhammad³

et al. 2023

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Anthropogenic activities, especially due to agricultural practices, tourism, and other land-use forms, have resulted in serious pollution of Bukit Merah reservoir (BMR), the oldest artificial reservoir in Malaysia since the 1980s. This study assessed the past ecological conditions of the reservoir using 210 Pb, dating techniques, selected metals, and physicochemical analysis of the sediment core to better manage the reservoir. 210 Pb results indicated 34 years of human impact on the reservoir, with arsenic recording the least concentrations in the 1980s and the highest concentrations in 2016 and 2018. The minimum and maximum concentrations of lead and cadmium were found in 1990 and 2009. Whereas Copper and Zinc, concentrations peaked in 2012. The mean EF values of metals in the sediment core were above 1 (EF>1), indicating anthropogenic sources. The I geo values of Arsenic and Cadmium ranged from uncontaminated to strongly contaminated, uncontaminated to moderately contaminated for Lead, Zinc, and Copper. Overall, the dated sediment of BMR revealed that human population growth and increasing economic and agricultural activities coupled with poor land-use forms at the catchment area are the main source of pollution to the reservoir. Therefore, regular monitoring and the enforcement of relevant environmental laws are needed to manage the reservoir.

show abstract

Comparison of spatiotemporal burial and contamination of heavy metals in core sediments of two plateau lakes with contrasting environments: implication for anthropogenic-driven processes

Wang,

Jiang,

Zhao

et al. 2023

Environ Monit Assess

View full text Add to dashboard Cite

Historical trends in atmospheric metal(loid) contamination in North China over the past half-millennium reconstructed from subalpine lake sediment

Cited by 17 publications

References 68 publications

Uncertainties in Pollution and Risk Assessments of Heavy Metals in Lake Sediments Using Regional Background Soils in China

Uncertainties in Pollution and Risk Assessments of Heavy Metals in Lake Sediments Using Regional Background Soils in China

Past Metal(loid) Pollution Records Inferred from the Sediments of Bukit Merah Reservoir Perak, Malaysia

Comparison of spatiotemporal burial and contamination of heavy metals in core sediments of two plateau lakes with contrasting environments: implication for anthropogenic-driven processes

Contact Info

Product

Resources

About