Study of soil physicochemical properties and heavy metals of a mangrove restoration wetland

Hu, Bo; Wu, Yaqing; Deng, Jun; Su, Haitao; Li, Yanqi; Nan, Yiting

doi:10.1016/j.jclepro.2021.125965

Cited by 26 publications

(7 citation statements)

References 46 publications

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“…A conspicuous difference was observed between the distributions of Cu and Cd speciations in the investigated area, which was influenced by soil physicochemical properties such as pH, AP, SOM, and iron oxides, among others [ 37 , 38 ]. As is well-known, soil colloid boasts a vast specific surface area and carries negative charges, thereby playing an important role in the distribution of PTE speciations and determining the concentration ratio and composition of amorphous and crystalline iron oxide fractions of PTEs in soil [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Spatial Differentiation Characteristics and Evaluation of Cu and Cd in Paddy Soil around a Copper Smelter

Ding

et al. 2023

Toxics

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To accurately evaluate the distribution and bioavailability of potentially toxic elements (PTEs) such as Cu and Cd in farmlands near a copper smelter, we determined the total concentrations (Cu-T and Cd-T), various speciation concentrations of Cu and Cd and physicochemical properties of 18 paddy soil (or colloid) samples in Guixi town, Jiangxi province, China. The results showed that the concentrations of Cu-T and Cd-T in the soil around the smelter far exceeded the standard limits. Specifically, Cu ranged from 97.47 to 1294.63 mg·kg−1, with a coefficient of variation (CV) of 0.95; Cd ranged from 0.14 to 9.06 mg·kg−1, and the CV was 1.68. Furthermore, the pollution of PTEs continued to accumulate, posing a significant risk to the environment and human health. The findings from the analysis of soil and colloid indicated that the distribution characteristics of Cu and Cd speciations did not align with the total concentrations. The highest pollution points were found to be shifted to the residual fraction of Cu, organic fraction, and crystalline iron oxide fraction of Cd in soil. The dominant fraction of Cu in colloid was the amorphous iron oxide fraction, whereas Cd was the crystalline iron oxide fraction. The assessment of Cu and Cd migration (MR) revealed that Cd posed a greater ecological risk. Further examination of the properties of iron oxides in soil and colloid revealed that they played a crucial role in the migration and transformation of soil PTEs.

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Section: Resultsmentioning

confidence: 99%

Spatial Differentiation Characteristics and Evaluation of Cu and Cd in Paddy Soil around a Copper Smelter

Ding

et al. 2023

Toxics

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“…Compared with other wetlands in China, the Tiaozini Wetland is the least Frontiers in Environmental Science frontiersin.org contaminated and uncontaminated, while all other wetlands are contaminated to a certain extent, and a common reason is the high concentration of Cd. The Tiaozini Wetland is not contaminated in terms of Igeo, but the Igeo of Cd is also the highest among the eight heavy metals, which is closely related to the intensity of anthropogenic activities (Wang et al, 2017;Lu et al, 2020;Hu et al, 2021). The Tiaozini wetland is China's 14th World Natural Heritage Site, the core area of China's Yellow (Bohai) Sea Migratory Bird Habitat (Phase I), and part of the area is not open to the public.…”

Section: Geoaccumulation Index (Igeo)mentioning

confidence: 99%

Heavy metal accumulation and health risk assessment in S. alterniflora Loisel. and native plant Suaeda salsa (L.) Pall. in Dongtai Tiaozini wetland

Li,

Cai,

Huang

et al. 2024

Front. Environ. Sci.

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Coastal wetlands play an irreplaceable role in the global ecosystem, and both human activities and natural factors may lead to the contamination of Tiaozini coastal wetland with heavy metals. The study was conducted to determine the contents of eight heavy metals, Hg, Cd, Cr, As, Pb, Cu, Ni, and Zn, in the above-ground and below-ground parts of the plants and in the rhizosphere sediment, using the invasive species S. alterniflora and the native plant S. glauca, calculating the geoaccumulation index (Igeo), bioaccumulation factor, transfer factor, total target risk quotient (TTHQ), and carcinogenicity risk (CR), to analyze the transfer characteristics and potential health risks to human beings of the heavy metals in plants. This study aims to investigate the enrichment characteristics of the dominant plant, S. alterniflora Loisel. (S. alterniflora) and Suaeda salsa (L.) Pall. (S. glauca). Regarding heavy metals, eight common heavy metal elements were selected, including Hg, Cd, Cr, As, Pb, Cu, Ni, and Zn, and examined their content in surface sediments and different parts of the two plants. The transfer characteristics of heavy metals in the plant body and their potential health risks to humans were also analyzed. These findings suggest that both plants accumulate higher concentrations of heavy metals in their below-ground parts. Cr, Cu, and Zn had the highest average concentrations in both plants. Geoaccumulation index (Igeo) indicated that the Tiaozini Wetland is not yet contaminated. S. alterniflora had transfer factors less than 1 for all heavy metals, while S. glauca had transfer factors greater than 1. Both plants had a certain purifying effect on heavy metal pollution in wetlands, including Cr, Cd, Cu, and Zn. However, Cr and As in the below-ground part of S. alterniflora and Cr in the above-ground part of S. glauca had a target hazard quotient (THQ) greater than 1, indicating a potential health risk to humans, but the carcinogenic risk is low. For other heavy metals, THQ was less than 1, indicating no health risk. The total target hazard quotient (TTHQ) of different parts of both plants was greater than 1, which must be taken into account when considering their suitability as edible resources.

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“…The complexity of the ecosystem risk has driven the development of various modelling approaches (Zerizghi et al, 2022). In terms of the evaluation of the environmental quality and ecological risk under the in uence of heavy metals, the single-factor pollution index (PI), geo-accumulation index (Igeo) (Hu et al, 2021), pollution load index (PLI) (Demkova et al, 2017), Nemerow Integrated Pollution Index (NIPI) and potential ecological risk index (RI) (Chen et al, 2016) are widely used (Men et al, 2018), which can analyse the pollution level of each heavy metal and the comprehensive environmental and ecological effects of various heavy metals to produce relatively objective evaluation results. However, the NIPI may overly highlight the impact of heavy metals with the highest PI values on the environmental quality and may arti cially exaggerate or reduce the impact role of some factors in the evaluation process, making this index insensitive to environmental quality evaluation.…”

Section: Introductionmentioning

confidence: 99%

Heavy metal pollution and ecological risk under different land use types: based on the similarity of pollution sources and comparing the results of three evaluation models

Gao

Gong

Jiang

et al. 2023

Preprint

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In key areas of ecological protection, it is significant to consider the similarity of pollution sources among heavy metals and the interaction between different sources, especially the ecological risk areas caused by heavy metal pollution. We collected 51 soil samples from five land use types with different soil depths in an industrial area on the Qinghai-Tibet Plateau. Two and three major heavy metal combination types of Cd Cu Cr Pb and Zn in different soil layers were identified using absolute principal component score-multiple linear regression models, and the potential pollution sources corresponding to the different types were quantified using Geo-Detector models. Industrial activities, especially metallurgy and mining, are the most likely potential sources of Cd Cu and Pb pollution, while the enrichment effects caused by rivers and roads are also evident in the study area. Heavy metal levels were generally higher in watered and urban lands and lower in grasslands. The downward migration of heavy metals in the study area was inferred from the similar trends of several indicators between soil layers A and B. The new model Nemerow Integrated Risk Index (NIRI) was used to analyse the integrated ecological risk across the study area and under different land use types by comparing with the pollution load index and Nemerow Integrated Pollution Index, and it was found that the risk level was lower in grassland and forest land than under other land use types, while it was higher in urban land and irrigated land. NIRI was able to highlight the impact of high Cd toxicity factors on the overall risk level, and is more accurate and flexible in identifying risk areas.

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Study of soil physicochemical properties and heavy metals of a mangrove restoration wetland

Cited by 26 publications

References 46 publications

Spatial Differentiation Characteristics and Evaluation of Cu and Cd in Paddy Soil around a Copper Smelter

Spatial Differentiation Characteristics and Evaluation of Cu and Cd in Paddy Soil around a Copper Smelter

Heavy metal accumulation and health risk assessment in S. alterniflora Loisel. and native plant Suaeda salsa (L.) Pall. in Dongtai Tiaozini wetland

Heavy metal pollution and ecological risk under different land use types: based on the similarity of pollution sources and comparing the results of three evaluation models

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