Effects of human enclosure and farming activities on heavy metals in sediments/soils of the coastal reclamation areas in the Yangtze Estuary

Mei, Junfeng; Jia, Jihui; Bi, Chen; Liu, Jiping; Zeng, Yongsheng; Chen, Zhenlou

doi:10.1007/s11368-022-03248-2

Cited by 4 publications

(3 citation statements)

References 69 publications

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“…In this study, TOC and TN were positively correlated with Cd, Pb, and Zn, which is in agreement with the results of previous studies (Liu et al, 2016;Islam et al, 2022;Mei et al, 2022). This could be explained by the fact that TOC, which is associated with wetland plants, may decrease the mobility of metals through exchange, chelation, and complexation (Marıá-Cervantes et al, 2010).…”

Section: Effect Of Ec and Nutrient Elementssupporting

confidence: 92%

“…The concentrations and spatial contribution of metals in delta soils are influenced by various factors, including soil properties, wetland types, hydrological condition, and anthropogenic activities, among others (Zhong et al, 2020;Xu et al, 2021;Mei et al, 2022). For example, a high correlation between total organic carbon (TOC) and metals was observed in soil given that TOC acts as the main contributor to exchanged or dissolved metals in the sediment (Zhang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Characteristics and influencing factors of metal distribution in different wetlands of the Liaohe Delta, Northeastern China

Zhang

Qin

et al. 2022

Front. Mar. Sci.

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Metal distribution in different wetlands under the complex influence of natural and anthropogenic activities in the Liaohe Delta was analyzed to better protect and manage delta areas. Ninety-six soil samples were collected from six wetland types, and the levels, depth distributions, risk, and influencing factors of metals (i.e., As, Cd, Cr, Ni, Cu, Pb, Zn, Mn, Al, and Fe) were analyzed. The results showed that the concentrations of As, Cd, Cr, Ni, Zn, and Al in more than 70% of the soil samples were higher than the background value of Liaoning Province. The concentration of As decreased with distance from the estuary, while that of Cr was higher downstream of Liaohe. The spatial distributions of Cd, Ni, Cu, Pb, and Zn were similar. The concentrations of most metals in the topsoil were higher than those in the subsoil. According to the Nemerow pollution index, higher pollution was observed in the area far away from the Liaohe River and Bohai Sea for the topsoil layer, while for the subsoil layers, higher pollution was observed in the area near the Liaohe estuary. The correlation analysis showed that the wetland type was clearly correlated with Cd, Cu, Al, and S. The concentrations of Cd, Pb, Zn, C, N, P, and S and the electrical conductivity obviously decreased with soil depth, while the concentration of Mn was positively correlated with soil depth. Mn was negatively correlated with total organic carbon (TOC), total nitrogen (TN), and total phosphorus (TP), whereas Cd, Pb, and Zn showed positive correlation with TOC, TN, and total sulfur (TS). The general linear model indicated that wetland type had a significant effect on As, Cd, Ni, Cu, Pb, Zn, Al, and Fe (p< 0.01), while depth had a significant effect on Cd, Cr, and Pb (p< 0.01). The findings of this work will contribute to pollution control and ecosystem health conservation of the Liaohe Delta.

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Section: Effect Of Ec and Nutrient Elementssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Characteristics and influencing factors of metal distribution in different wetlands of the Liaohe Delta, Northeastern China

Zhang

Qin

et al. 2022

Front. Mar. Sci.

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“…The sediments were dried at 65°C to a constant weight, impurities such as gravel (without OC) were removed by examining the samples on a hard white paper board, and the samples were dispersed with glass bars under equal pressure, passed through a 60-mesh sieve and sealed. All samples were transported to the laboratory within 72 h (Mei et al, 2022).…”

Section: Experimental Design and Samplingmentioning

confidence: 99%

Seasonal dynamics of sediment organic carbon storage for the upper streams of the Yangtze River

Hou,

Li,

Wang

et al. 2023

Front. Ecol. Evol.

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IntroductionForest streams reserve more than 90% of the organic carbon (OC) in sediments, thus playing crucial roles in the global carbon cycle. Although forest streams are widely distributed across various forest regions, seasonal dynamics of OC in forest sediments have not been fully investigated.MethodsHere, we sampled soils (0–5 cm) in 15 representative forest stream sediments for 5 critical periods (snowmelt season, early growing season, growing season, late growing season, and seasonal snow cover season) during a one-year investigation in a geologically fragile subalpine coniferous forest catchment in the upper reaches of the Yangtze River in Sichuan province and the OC concentrations were measured by potassium dichromate external heating method.ResultsThe OC concentration of stream sediments ranged from 6.39 to 458.93 g kg−1, and the average was 84.56 g kg−1 for 15 streams in 5 critical periods during a 1-year investigation. Correspondingly, their stocks ranged from 2.05 to 310.56 kg m−2, and the average was 46.03 kg m−2. The maximum and minimum OC stocks were consistently observed during the late growing season and the snowmelt season, respectively. Otherwise, the OC stocks ranged from 1.31 to 218.05, 1.29 to 182.64, and 0.99 to 190.38 kg m−2 for the upstream, midstream, and downstream sediments, and the average was 39.36, 36.58, and 37.93 kg m−2, respectively. The average ratios of the OC stocks of the upstream and downstream ranged from 0.10–6.31, with an average of 1.43, during 5 critical periods, which indicated that the forest stream sediments may play crucial roles as carbon sources.DiscussionFurthermore, based on regression analysis, we found that the seasonal dynamics of OC concentrations and stocks were mainly regulated by precipitation, temperature, sediment depth, and litter carbon input to the streams together. These findings demonstrate that forest stream sediments may play crucial roles in the carbon biogeochemical cycle of subalpine forests and adjoining streams.

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Potentially Toxic Elements’ Accumulation in Relation to Sediment Physicochemical Attributes and Microplastic Content in Zayandeh-Rood River, Iran

Behmanesh,

Chamani,

Chavoshi

2024

Arch Environ Contam Toxicol

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Effects of human enclosure and farming activities on heavy metals in sediments/soils of the coastal reclamation areas in the Yangtze Estuary

Cited by 4 publications

References 69 publications

Characteristics and influencing factors of metal distribution in different wetlands of the Liaohe Delta, Northeastern China

Characteristics and influencing factors of metal distribution in different wetlands of the Liaohe Delta, Northeastern China

Seasonal dynamics of sediment organic carbon storage for the upper streams of the Yangtze River

Potentially Toxic Elements’ Accumulation in Relation to Sediment Physicochemical Attributes and Microplastic Content in Zayandeh-Rood River, Iran

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