Effect of river-lake connectivity on heavy metal diffusion and source identification of heavy metals in the middle and lower reaches of the Yangtze River

Luo, Mingke; Yu, Hui; Liu, Qian; Lan, Wei; Ye, Qiaoru; Niu, Yuan; Niu, Yong

doi:10.1016/j.jhazmat.2021.125818

Cited by 65 publications

(15 citation statements)

References 51 publications

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“…Hydrological connectivity coupled with transport and transfer of heavy metals lead to distinctly spatial differences of heavy metal distribution. Previous study has found that Cd and Cr concentrations are higher in lakes connected to the Yangtze River, whereas concentrations of Cu, Zn, Pb, and As are higher in lakes disconnected with the Yangtze River, resulting in enriched metal pollutants in connected lakes, downstream and multi-branch (Luo et al, 2021). In addition to the direct transfer of heavy metals, hydrological connectivity also has indirect effects on heavy metals.…”

Section: Heavy Metals Pollution and Potential Risk Assessmentmentioning

confidence: 96%

Spatiotemporal variation and ecological risk assessment of sediment heavy metals in two hydrologically connected lakes

et al. 2022

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Excessive accumulation of heavy metals in global lake sediments poses a serious threat to lake water quality and ecosystem security. However, there is still a knowledge gap in comparison of heavy metal variation and pollution in hydrologically connected lakes. In this study, concentrations of As, Cd, Cr, Cu, Hg, Pb, and Zn in sediments of two hydrologically connected lakes, Xingkai Lake and Xiaoxingkai Lake, were determined during the hydrologically connected periods (May and September) and disconnected period (January and July) in 2021. We found the range of As was 2.58∼14.35 mg/kg, Cd was 0.050∼0.21 mg/kg, Cr was 28.58∼262.3 mg/kg, Cu was 3.12∼28.05 mg/kg, Hg was 0.0030∼0.14 mg/kg, Pb was 10.87∼58.86 mg/kg, and Zn was 18.21∼90.73 mg/kg. Heavy metal concentrations were lower than grade I level in Chinese soil quality standards with significant spatial and temporal differences in the basin. Overall, most of the sampling sites in Xingkai Lake and Xiaoxingkai Lake were at the uncontaminated level and moderate ecological risk during the sampling period. Two lakes showed different heavy metal compositions, accompanied by higher contamination level and higher potential ecological risk in the small lake than those in the large lake based on analysis of the geo-accumulation index and potential ecological risk index. Besides, the contamination level and potential ecological risk in May and September were higher than those in January and July, mainly due to human activities and hydrological connectivity. The ecological risks were moderate for Cd and Hg, and low for As, Cr, Cu, Pb, and Zn. Correlation and PCA analyses showed that Cd mainly originated from anthropogenic sources, while other metals mainly came from natural sources. These findings elucidate the effects of agriculture and hydrological connectivity on heavy metals in sediments, and provide scientific basis for the reasonable management of lake ecosystem.

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Section: Heavy Metals Pollution and Potential Risk Assessmentmentioning

confidence: 96%

Spatiotemporal variation and ecological risk assessment of sediment heavy metals in two hydrologically connected lakes

et al. 2022

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“…The lakes which are separated from the river Yangtze have higher concentration of Cu, Zn, Pb and As and the lakes connected with the river have higher concentration of Cd and Cr. During the analysis, the characteristics of heavy metals pollution were defined, the reasons of nonspot pollution on the plain by the river Yangtze were described and it was demonstrated that soil erosion is an important factor in case of metal water diffusion (Luo et al, 2021).…”

Section: Factors Of Environmental Safety Reduction On Styr River In T...mentioning

confidence: 99%

Factors of Environmental Safety Reduction on Styr River in the City of Lutsk (Ukraine)

Kopylov¹,

Popovych²,

Shukel³

et al. 2023

Ecol. Eng. Environ. Technol.

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Water ecosystems comprise above two thirds of our planet and play an important role in stabilization of global climate, and also provide a wide range of services to the rapidly increasing society. A number of scientific works are devoted to the study of environmental safety. Water is a basis of life on our planet, and the issue of rivers protection should be of top priority. Unfortunately, a considerable number of surface water reservoirs undergo anthropological influence. The analysis of the research allows us to note that surface water reservoirs, lakes, rivers and their floodplain suffer from human-made pollution. At the time of total use of plastics in all spheres of life, its presence in rivers is detected at the micro-level. The aim of our study is the analysis of landscape-forming factors of ecological safety of the river Styr within the city of Lutsk (Ukraine). The volume of discharge of untreated return water into the river Styr within the city of Lutsk during the last years tends to decrease: in 2018 -427 000 m 3 ; 2019 -424.9 000 m 3 ; 2020 -423 000 m 3 . It is established that the quality of water of the river Styr in the range line above the city are affected by the pollution from the river Ikva housing-communal enterprise "Mlynivske" and state communal enterprise "Dubnivske", and also waste waters transferred from Lviv region -communal enterprise "Radekhiv water sewage enterprise" (through the river Ostrivka) and communal enterprise "Brodyvodokanal" (through the river Bovdurka). The quality of water in the range line below the city undergoes the influence of the waste waters from communal enterprise "Lutskvodokanal". In order to assess transformation of ecological conditions within urban floodplain, it is proposed to run biomonitoring on the basis of fluctuating asymmetry (FA) of a leaf of a plant, which is informative in case of description of the peculiarities of formation of vegetation.

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“…Rising environmental contamination has put human health at great risk, especially in water bodies that are contaminated with various pollutants—antibiotics ( Lyu et al, 2020 ), dyes ( Aruna et al, 2021 ), pesticides ( Gaur et al, 2018 ), heavy metals ( Luo et al, 2021 ), etc. Even though industrial wastewater is intensively treated prior to discharge, organic pollutants such as dyes are still detected as micropollutants in different environment matrices, such as in water, suspended particulate matters, sediments, and wild fishes ( Tkaczyk et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Valorization of sugarcane bagasse for sugar extraction and residue as an adsorbent for pollutant removal

Wang

Tian

Guan

et al. 2022

Front. Bioeng. Biotechnol.

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Following juice crushing for sugar or bioethanol production from sugarcane, bagasse (SCB) is generated as the main lignocellulosic by-product. This study utilized SCB generated by a hydraulic press as feedstock to evaluate sugar extraction as well as adsorption potential. Total soluble sugar (sucrose, glucose, and fructose) of 0.4 g/g SCB was recovered with H2O extraction in this case. Insoluble sugar, that is, cellulose in SCB, was further hydrolyzed into glucose (2%–31%) with cellulase enzyme, generating a new bagasse residue (SCBE). Persulfate pretreatment of SCB slightly enhanced saccharification. Both SCB and SCBE showed great potential as adsorbents with 98% of methylene blue (MB) removed by SCB or SCBE and 75% of Cu2+ by SCBE and 80% by SCB in 60 min. The maximum adsorption amount (qm) was 85.8 mg/g (MB by SCB), 77.5 mg/g (MB by SCBE), 3.4 mg/g (Cu2+ by SCB), and 1.2 mg/g (Cu2+ by SCBE). The thermodynamics indicated that the adsorption process is spontaneous, endothermic, and more random in nature. The experimental results offer an alternative to better reutilize SCB.

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Effect of river-lake connectivity on heavy metal diffusion and source identification of heavy metals in the middle and lower reaches of the Yangtze River

Cited by 65 publications

References 51 publications

Spatiotemporal variation and ecological risk assessment of sediment heavy metals in two hydrologically connected lakes

Spatiotemporal variation and ecological risk assessment of sediment heavy metals in two hydrologically connected lakes

Factors of Environmental Safety Reduction on Styr River in the City of Lutsk (Ukraine)

Valorization of sugarcane bagasse for sugar extraction and residue as an adsorbent for pollutant removal

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