Article
Environmental Sciences
Yi-An Chen, Chung-Pai Chang, Wei-Chia Hung, Jiun-Yee Yen, Chih-Heng Lu, Cheinway Hwang
Summary: Land subsidence is a significant global issue that can lead to increased flood risks, infrastructure damage, and economic losses. This study utilized multiple-sensor observations to analyze land subsidence in the Choushui River alluvial fan (CRAF) in Taiwan from 1993 to 2019, revealing significant subsidence in coastal areas and inland regions with high subsidence rates. The research also identified a new subsidence center along the Taiwan High Speed Rail with rates ranging from 30 to 70 mm/yr, and produced a map showing deep compaction distribution below 300 m depth in the CRAF.
Article
Environmental Sciences
Yaojin Xiong, Yao Du, Yamin Deng, Teng Ma, Dian Li, Xiaoliang Sun, Guangning Liu, Yanxin Wang
Summary: This study used multiple stable isotopes and spectral characteristics of DOM to investigate the sources and fate of nitrate and ammonium in groundwater in the Central Yangtze River Basin. Different hydrogeological conditions were found to control the behavior of nitrogen compounds in three subareas, leading to contrasting patterns of nitrogen sources and fate.
ENVIRONMENTAL POLLUTION
(2021)
Article
Geosciences, Multidisciplinary
Hsin-Fu Yeh, Jui-Chi Chang, Chia-Chi Huang, Hsin-Yu Chen
Summary: This study aims to understand the factors influencing changes in groundwater level in the Choushui River alluvial fan in Central Taiwan. Through statistical analysis and geographically weighted regression model, it was found that drainage density, slope, vegetation index, and precipitation affect groundwater level in the dry season, while drainage density, slope, vegetation index, and wetness index affect groundwater level in the wet season. The results of this study provide important references for future regional water resource utilization and management.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Engineering, Environmental
Yaojin Xiong, Yao Du, Yamin Deng, Teng Ma, Yanxin Wang
Summary: Groundwater nitrogen contamination is a growing concern worldwide. This study provides evidence of the occurrence of Feammox in groundwater and identifies the key microbial and environmental factors associated with this process.
Article
Environmental Sciences
Zhili Chen, Xiaohu Huang, Changchun Huang, Yanju Yang, Hao Yang, Jinbo Zhang, Tao Huang
Summary: This study examined nitrogen deposition in urban and suburban areas in the Yangtze River Delta, finding higher deposition rates in urban areas compared to suburban areas. The delta N-15 values of NH4+ and NO3- in precipitation increased with precipitation pH, indicating the influence of ambient acidity. Combustion-related NH3 emissions and non-fossil fuel NOx emissions were identified as significant sources in urban areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Water Resources
Igor Karlovic, Kristijan Posavec, Ozren Larva, Tamara Markovic
Summary: This study focuses on the Varazdin alluvial aquifer in the Drava River valley and uses numerical modeling to evaluate future nitrate concentrations in groundwater. The results show that reducing nitrate input from agricultural areas can effectively lower nitrate levels, while the impact of wastewater is negligible. However, none of the scenarios were able to reach nitrate concentrations below 50 mg/L in the entire aquifer in the next 20 years.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Geochemistry & Geophysics
Xing-yu Huang, Dong Zhang, Zhi-qi Zhao, Yun-tao Liu, Hong-qi Meng, Shuang Zou, Bing-juan Ma, Qi-yan Feng
Summary: It was found that untreated manure and domestic sewage are the primary sources of nitrate in groundwater in a residential area. The study also highlighted the impact of different sources on groundwater nitrate levels, including manure/sewage, precipitation, soil nitrogen, and synthetic fertilizer. The multiple isotopes confirmed the nitrate pollution sources and pathways in residential areas.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Engineering, Environmental
Seung-Hee Kim, Dong-Hun Lee, Min-Seob Kim, Han-Pil Rhee, Jin Hur, Kyung-Hoon Shin
Summary: In this study, an integrated framework was validated to effectively manage nitrate loading in complex river systems through quantitative estimation of nitrate sources. The isotopic compositions of nitrates showed different ranges among land-use types, reflecting different nitrate sources within watersheds. Hydrological conditions, such as water discharge, partially controlled total nitrate loads. Sewage transport near urban boundaries showed unique enhancement and increased total nitrate load in downstream areas. The isotopic and model-based nitrate fluxes showed good correlation for urban sources but poor correlation for agriculture-dominated land use.
Article
Environmental Sciences
Wenzhao Feng, Shiqin Wang, Chunsheng Hu, Liangping Li
Summary: Groundwater nitrate vulnerability in alluvial plains in agricultural areas is influenced by land use and landform sedimentary types. The distribution, sources, and fate of nitrate are mainly controlled by landform types. Proluvial and alluvial-proluvial fans have high vulnerability and nitrate levels, while alluvial and flood plains have low vulnerability and nitrate levels. River belts, lakes, and depressions are in the medium vulnerability class. The study contributes to the management of land and water resources in similar environments.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Tongde Chen, Juying Jiao, Ziqi Zhang, Hong Lin, Chunjing Zhao, Haolin Wang
Summary: The study found that the soil quality of alluvial fans in the Lhasa River Basin of the Qinghai-Tibet Plateau is not significantly different from river terrace farmland, with higher variation coefficients in physicochemical indicators. The soil quality of alluvial fans is highly correlated with vegetation coverage, land use, annual precipitation, altitude, and geomorphic divisions.
Article
Environmental Sciences
Hong-Duck Ryu, Sun-Jung Kim, Un-il Baek, Deok-Woo Kim, Hyun-Jeoung Lee, Eu Gene Chung, Min-Seob Kim, Kyunghyun Kim, Jae Kwan Lee
Summary: A novel approach using dual ammonium and nitrate nitrogen isotope ratios was proposed to identify nitrogen sources in intensive livestock farming watersheds, showing that seasonal patterns of delta N-15(NH4) and delta N-15(NO3) can reflect nitrogen pollution from agricultural activities. The study revealed that microbial nitrification is the dominant nitrogen transformation process in the river, and the dual delta N-15(NH4) and delta N-15(NO3) axes provide better results compared to traditional methods for identifying nitrogen sources in agricultural watersheds with swine excreta treatment facilities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Shen Li, Hao Jiang, Wenjing Guo, Wenshi Zhang, Quanfa Zhang
Summary: High nitrate levels in rivers can lead to eutrophication and have various ecological implications. This study investigated the drivers of high nitrate levels in a sparsely populated forest river and found that soil sources were a major contributor, with low removal processes. Nitrification was the dominant process in summer, while low temperature constrained nitrification in winter.
Article
Engineering, Environmental
Wenshi Zhang, Hao Jiang, Wenjing Guo, Shen Li, Quanfa Zhang
Summary: This study integrated river isotopes, 15N pairing experiments, and qPCR to reveal the processes driving the high NO3- levels in a nearly pristine forest river on the Qinghai-Tibet Plateau. The river isotopes suggested that, at the catchment scale, NO3- removal was prevalent in summer, but weak in winter. The release of soil NO3- to the river was transport-limited in both seasons, which resulted in the consistently high NO3- levels.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Jose Schreckinger, Michael Mutz, Clara Mendoza-Lera
Summary: Climate change and human water demand have caused more frequent and longer drying periods in rivers and streams globally. The biogeochemical processes during the water return in these dried riverbeds are not well understood. This study found that the attributes of drying, including duration and intensity, have significant impacts on the biogeochemical dynamics upon flow resumption. However, within four days, respiration and nutrient dynamics did not recover to pre-drying levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agronomy
Luiz H. Moro Rosso, Andre F. de Borja Reis, Santiago Tamagno, Adrian A. Correndo, P. V. Vara Prasad, Ignacio A. Ciampitti
Summary: Soybean plays a critical role in global food security and sustainability, but the interaction between soil nitrogen supply and nitrogen fixation throughout the growing season is poorly understood. This study evaluated the relationship between nitrogen uptake and dry matter, described seasonal changes in soil-plant nitrogen dynamics among genotypes with different genetic backgrounds, and assessed the influence of soil NO3 and NH4 on temporal nitrogen fixation changes. The findings showed that nitrogen uptake from the soil had a greater impact on total nitrogen status than fixation. NH4 exposure and delayed NO3 availability suppressed end-season nitrogen fixation, highlighting the importance of soil nitrogen sources in soybean growth.
EUROPEAN JOURNAL OF AGRONOMY
(2023)
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)