The ecological risk assessment and suggestions on heavy metals in river sediments of Jinan

Wang, Xu; Ren, Lei; Jiao, Fengchao; Liu, Wenjie

doi:10.2166/wst.2017.380

Cited by 11 publications

(6 citation statements)

References 26 publications

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“…ere is growing concern all over the world that a large amount of industrial wastewater and domestic sewage is discharged directly into rivers or other water bodies due to the rapid development of industrialization and urbanization [1][2][3]. Of all the pollutants in the discharges that endanger ecosystem, heavy metals play a significant role [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Of all the pollutants in the discharges that endanger ecosystem, heavy metals play a significant role [4,5]. When accumulated to some extent in sediment, heavy metals such as Cu, Cd, Pb, Zn, Ni, Hg, and Cr can be toxic to plants, animals, humans, and aquatic life due to the characteristic of bioaccumulation, persistence, and environmental toxicity [1,2,6]. e heavy metals discharged in the water bodies through different sources would finally be enriched in the sediments by adsorption, complexation, flocculation, and sedimentation [7,8].…”

Section: Introductionmentioning

confidence: 99%

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pH Effect on Heavy Metal Release from a Polluted Sediment

Zhang

et al. 2018

Journal of Chemistry

106

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The performance of Cd, Ni, and Cu release from river sediment at different pH was investigated by a leaching test using deionised water and river water as leachants. Visual MINTEQ geochemical software was used to model the experimental results to predict heavy metal release from sediments. The distribution and speciation of heavy metals in the sediments after leaching test were analyzed by Tessier sequential extraction. Leaching test results showed that the release amounts of Cd, Ni, and Cu are in the range of 10.2–27.3 mg·kg−1, 80.5–140.1 mg·kg−1, and 6.1–30.8 mg·kg−1, respectively, with deionised water as leachant at different pH. As far as the river water was used as the leaching solution in the test, the results show similar metal leaching contents and tendencies to that of the deionised water as leaching solution. The results of Tessier sequential extraction indicate that Cd of residual fraction easily forms obvious precipitate under the acidic condition, especially in the range of pH 0–4 with the residual of Cd over 50% of the total Cd in the sediment. The exchangeable content of Ni decreases with the increase of pH under the range of 0–5. The Fe-Mn oxide fraction of Cu in the sediments changes significantly from pH 0 to pH 9. Based on the effect of pH on the leaching of Cd, Ni, and Cu from the polluted sediment in the tests, more accurate information could be obtained to assess the risk related to metal release from sediments once it is exposed to the changed acid/alkali water conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

pH Effect on Heavy Metal Release from a Polluted Sediment

Zhang

et al. 2018

Journal of Chemistry

106

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“…In addition, this residential area is also home to petrochemical factories. The factories could produce wastewater containing high levels of Pb and organic matter (Wang et al, 2017;Dong et al, 2022). Hence, the domestic mixed factory discharge is likely to be an important source and disturbance factor of Pb in the Xiaoqing River.…”

Section: The Migration Behavior Of Pbmentioning

confidence: 99%

Fractionation of toxic metal Pb from truly dissolved and colloidal phases of seaward rivers in a coastal delta

Ren¹,

Schmidt²,

Li³

et al. 2023

Front. Mar. Sci.

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Colloids of natural river water is a key intermediate carrier of lead (Pb). It is important to monitor the transport–transformation behavior of Pb in the colloidal phase of seaward water because this behavior is related to the levels of pollution input and environmental risks posed to the sea, especially in coastal delta areas. In this study, the fractionation behavior and distribution of toxic Pb from the truly dissolved phase and the different colloidal phases in seven seaward rivers in the Yellow River Delta were investigated. The concentrations of total dissolved Pb, truly dissolved Pb, and colloidal Pb were 0.99–40.09 μg L–1, 0.40–8.10 μg L–1, and 0.60–35.88 μg L–1, respectively. In freshwater rivers, the main component of total dissolved Pb (about > 50%) is truly dissolved Pb but the main component of total dissolved Pb in the seawater environment is colloidal Pb (> 80%). A dramatic increase in salinity causes the deposition (about ≈94%) of all forms of Pb to sediment from estuarine water in winter. However, this sedimentation behavior of colloidal Pb gradually decreases (in the Shenxiangou River) when the river salinity approaches seawater salinity (S = ≈29). In the industrial port (Xiaoqinghe River) and mariculture (Yongfenghe River) estuarine areas, which have extensive seawater, the deposition behavior of colloidal Pb (<15%) is less affected by the change in salinity. This suggests that human activity contributes to the spread of Pb in the offshore environment. The concentration of 100 kDa–0.22 μm Pb has a postive correlation with total colloidal Pb. Its variation is minimally affected by salinity compared with other colloidal components. In addition, the correlation between the molecular weight and aromaticity of chromophoric dissolved organic matter (CDOM) and colloidal Pb suggests that macromolecules in seawater will be important transport carriers of Pb. In all, truly dissolved Pb is the main transport form of dissolved Pb in river freshwater; however, in brackish water in estuaries, colloidal matter gradually becomes the main transport carrier. Surging salinity immobilizes truly dissolved Pb in the estuarine region, but colloidal matter inhibits this deposition. Colloidal phase is the important conversion for land–sea transport of Pb by seaward rivers.

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“…Recent years have seen steady promotion of the Xiaoqing River basin ecological environment comprehensive management plan and a progressive restoration of the watershed ecosystem [23]. The Xiaoqing River study is currently being conducted at the watershed and regional scales, and the evaluation findings are somewhat broad and challenging to apply to river management [24,25]. As a result, in order to determine the Xiaoqing River's functional state as precisely as possible, this study established a multiindicator and multilevel multifunctional river evaluation indicator system and assessed its function at the level of river segments.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a Multifunctional River Using Fuzzy Comprehensive Evaluation Model in Xiaoqing River, Eastern China

Liu

et al. 2022

IJERPH

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Rivers are beneficial to humans due to their multiple functions. However, human meddling substantially degrades the functions of rivers and constitutes a threat to river health. Therefore, it is vital to assess and maintain river function. This study used the Xiaoqing River in Shandong Province, China, as a case study and established a multilayered multifunctional river evaluation indicator system consisting of environmental function, ecological function, social function, and economic function. The weights of indicators were calculated using the analytic hierarchy process (AHP) and the entropy method. Furthermore, a fuzzy comprehensive evaluation model based on the Cauchy distribution function was developed to assess the operation status of each function in each river segment. The results of the indicator and criterion layers in different river sections varied. The multifunctionality of the river decreased from upstream to downstream. The Jinan section was the most multifunctional, followed by the Binzhou, Zibo, and Dongying sections, and finally the Weifang section. Through additional analysis, this study determined the constraint indicators and functions of each river section. Overall, the results reveal that the idea of a “multifunctional river” can advance the theoretical understanding of a river’s function, and the fuzzy comprehensive evaluation model is demonstrated to provide fresh perspectives for evaluating river function.

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The ecological risk assessment and suggestions on heavy metals in river sediments of Jinan

Cited by 11 publications

References 26 publications

pH Effect on Heavy Metal Release from a Polluted Sediment

pH Effect on Heavy Metal Release from a Polluted Sediment

Fractionation of toxic metal Pb from truly dissolved and colloidal phases of seaward rivers in a coastal delta

Assessment of a Multifunctional River Using Fuzzy Comprehensive Evaluation Model in Xiaoqing River, Eastern China

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