Article
Environmental Sciences
Xin Song, Jianwei Dong, Hongbing Wang, Hui Xie, Yue Yu, Le Geng, Zhenwei Yuan, Yongfen Du
Summary: This study compared the characteristics and fate of organic carbon (OC) in four sedimentary environments (mangrove, sandy coast, bay, and estuary) in a coastal area in Guangdong, China. The results showed a large spatial heterogeneity in the concentrations and content of OC. The actual organic carbon storage in the mangrove sedimentary environment was underestimated by 18.2%. Therefore, this study provides new insights for the management and protection of coastline eco-environments and the estimation of carbon stock to adapt to climate change.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Environmental Sciences
Tae-Jin Park, Moon-Kyung Kim, Seung-Hyun Lee, Mun-Ju Kim, Young-Sun Lee, Bo-Mi Lee, Ki-Seon Seong, Ji-Hyoung Park, Kyung-Duk Zoh
Summary: This study investigated the distribution of microplastics (MPs) in riverine sediment in South Korea, finding a higher abundance of MPs after the mosoon season. The most common polymer types were polyethylene and polypropylene. The concentrations of organic carbon, total nitrogen, and total phosphorus in the sediment were positively correlated with MP abundance. This study provides valuable findings for managing MP pollution.
Article
Agriculture, Multidisciplinary
Shunhua Yang, Yue Dong, Xiaodong Song, Huayong Wu, Xiaorui Zhao, Jinling Yang, Songchao Chen, Jo Smith, Gan-Lin Zhang
Summary: Soil organic carbon is crucial for soil health and combating global warming. This study explores its distribution and controlling factors in the entire regolith. The results show that there is a large carbon reservoir in the deep regolith, and land use strongly affects carbon distribution in the top 100 cm of soil layers but has little effect on deep soil organic carbon. Soil texture is the primary controlling factor for organic carbon content.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Biodiversity Conservation
Peipei Yang, Qiang Shu, Qing Liu, Zhou Hu, Shunjie Zhang, Yanyu Ma
Summary: The study revealed that the OC and IC contents in surface sediments of tidal flat sections increase from seaward to landward parts, with vegetation coverage playing a significant role in carbon content. Particle size and nitrogen content are the main factors influencing OC and IC contents, while salinity has a minimal impact. The positive coupling of IC and OC suggests a contribution from nearshore vegetation and transformation processes.
ECOLOGICAL INDICATORS
(2021)
Article
Geochemistry & Geophysics
Wei Wang, Xueqiu Wang, Bimin Zhang, Qinghua Chi, Qingqing Liu, Jian Zhou, Xinbin Cheng, Lanshi Nie, Hanliang Liu, Dongsheng Liu, Taotao Yan, Longxue Li
Summary: The China Geochemical Baseline project collected baseline data on 76 elements, including iodine, from soil and sediment samples. Iodine concentrations were determined using colorimetry and the average values were found to be 1.45 mg/kg in top samples and 1.43 mg/kg in deep samples. The distribution of iodine is influenced by atmospheric washout, distance from the sea, soil composition, and mineral distribution.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2023)
Article
Geosciences, Multidisciplinary
Han Zhang, Zhencheng Ouyang, Penghui Jiang, Manchun Li, Xiaomin Zhao
Summary: Soil organic carbon, total phosphorus, and the carbon-to-phosphorus ratio are important indicators of soil fertility. This study characterized the spatial patterns and driving factors of these indicators in farmland in Jiangxi Province, China. The results showed that soil physicochemical properties had the most significant influence on these indicators, with soil total nitrogen identified as the main driver. The findings provide insights for assessing soil carbon and phosphorus pools and sustainable agricultural development.
Article
Environmental Sciences
Yi Ge, Yinghua Lou, Minmin Xu, Chao Wu, Jun Meng, Lei Shi, Fang Xia, Yan Xu
Summary: The study revealed spatial variation and functional diversity in microbial structures of urban river sediments, influenced by both natural and anthropogenic factors. Bacterial community compositions in sediments varied significantly among different regions, affected by heavy metals and sediment nutrients.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
D. V. Kim, V. V. Sattarova, K. I. Aksentov, E. A. Lopatnikov, M. V. Ivanov, A. V. Alatortsev, M. S. Melgunov
Summary: Twenty-seven sediment samples from the eastern Laptev Sea were analyzed for mercury and total organic carbon as well as grain-size distribution. The average total mercury (THg) concentrations in sediments are 29 +/- 14 mu g kg-1. A significant correlation of THg content with total organic carbon and clay and silt fractions was shown. The 210Pb-dated sediment core was used to evaluate the contamination degree and flux of THg in sediments from the eastern Laptev Sea. The average sedimentation rate for the all dated intervals was 0.17 cm/year. The THg flux increased from 20 to 28 mu g/m2/year in the period of 1892-1950 to 53-59 mu g/m2/year in the modern period of 2011-2015. According to various indices, the ecological risk from THg in studied sediment was low.
MARINE POLLUTION BULLETIN
(2023)
Article
Agronomy
Muhammad Raza Farooq, Zezhou Zhang, Linxi Yuan, Xiaodong Liu, Abdul Rehman, Gary S. Banuelos, Xuebin Yin
Summary: The distribution and bioavailability of selenium in agricultural soils in Zhongwei, China were investigated. The results showed that although the total selenium content was low, the bioavailability was high, suggesting the potential to produce selenium-enriched crops.
Article
Biodiversity Conservation
Chao -Yuan Lin, Li-Sheng Kuo, Ting -Yu Chen, Shao-Wei Wu, Chun -Wei Tseng
Summary: This study proposes a forest land carbon storage assessment model that operates through a conceptual model and environmental indicators. The model has been verified and shows high accuracy in estimating carbon stock. The combination of conceptual models and environmental indicators is helpful in assessing watershed carbon stocks and fluxes.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Juan Chen, Rui Liu, Yantao Jian, Teng Ma
Summary: The release of pore water has a significant impact on groundwater quality, but the transformation mechanisms of iron in clayey aquitards remain unclear. This study reveals the occurrence and influencing factors of iron in the aquitard using hierarchical extraction, statistical analysis, and simulation calculations. The results show that the dissimilatory reduction in free iron oxide is the main source of iron ions in pore water. Organic-rich clay promotes the reduction of iron oxides, while sand-rich strata have lower iron concentrations due to weak adsorption capacity. Human reclamation activities mainly affect the shallow layer, and reactive organic matter from crops promotes the enrichment of iron in deep pore water.
Article
Biodiversity Conservation
Zhenwen Fang, Sha Zhou, Shaohong Zhang, Wenchao Xing, Xiaoling Feng, Qiaoling Yang, Fazhu Zhao, Kang Liu, Jun Wang
Summary: This study investigated the spatial distribution of soil organic carbon density (DSOC) in Xi'an City Ring Expressway, China. The results showed that DSOC was higher in urban center and decreased towards suburb, and it was also influenced by land-use types. The findings provide a scientific foundation for future soil carbon management in urban development.
Article
Geosciences, Multidisciplinary
Jinying Xu, Hui Zou, Xiaolong Wang, Xuejun Duan, Jinfu Liu, Yongjiu Cai
Summary: In this study, the pollution status and potential risk of metals in the riparian sediment of Yangtze River were assessed using the geo-accumulation index (Igeo), ecological risk index (RI), and health risk index (THQ). The study found that the calculated regional geochemical baseline (RGB) values effectively modeled the background values of metals. The primary pollutant was Cd, which showed varying levels of contamination and ecological risk in different areas of the river. The health risk of metals from consuming fish influenced by suspended sediment was found to be low. The analysis revealed the influence of factors such as sediment property, land use composition, and landscape configuration on the distribution of metals in the sediment.
Article
Green & Sustainable Science & Technology
Jiayu Tian, Yaru Yuan, Pengchong Zhou, Lixin Wang, Zhuoxin Chen, Qiang Chen
Summary: This study aimed to analyze the spatial distribution of soil organic carbon (SOC) and total nitrogen (STN) in a micro-catchment area comprising farmland and a gully with vegetation restoration and their influencing factors. The results indicate that SOC and STN content varied moderately across the entire micro-catchment area, with greater values in the gully head area than in the gully mouth area. Factors such as soil water content, aggregate distribution, and land use types were found to significantly affect the spatial distribution of SOC and STN contents.
Article
Environmental Sciences
Ruirui Yang, Jiaohui Fang, Qingqing Cao, Di Zhao, Junyu Dong, Renqing Wang, Jian Liu
Summary: The study found that the content and storage of soil organic carbon (SOC) in subsurface flow constructed wetlands were significantly higher than those in surface flow constructed wetlands, but the organic carbon storage in subsurface flow constructed wetlands was less stable. The composition of SOC in both wetlands was mainly influenced by total nitrogen, and the abundance of microbial species in subsurface flow constructed wetlands was positively correlated with SOC.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
