Article
Environmental Sciences
Evgeny Yakovlev, Andrey Puchkov, Vladimir Bykov
Summary: The study reveals that the radioactivity in bottom sediments and surface water of the Pechora River delta is mainly from natural radionuclides, with low levels of artificial radioactivity. The radiation hazard parameters in the Pechora River delta are below the world average levels and do not pose significant risks to the health of local residents.
MARINE POLLUTION BULLETIN
(2021)
Article
Multidisciplinary Sciences
Fanxi Li, Xia Yu, Jiemei Lv, Qixin Wu, Yanling An
Summary: This study investigated the concentrations of heavy metals in surface sediments of the Chishui River Basin in China and evaluated the pollution characteristics and the influence of human activities on heavy metal levels using various indexes. The results showed contamination of mercury (Hg) and cadmium (Cd) in the basin, with Hg identified as the main pollutant and copper (Cu), zinc (Zn), and arsenic (As) having a similar source.
Article
Environmental Sciences
Cleber Pinto da Silva, Estevan Luiz da Silveira, Daniele Cristina Hass Seremeta, Danilo Gabriel dos Santos Matos, Andre Martins Vaz-dos-Santos, Sandro Xavier de Campos
Summary: The study found that anthropic activities have altered the natural rates of metal mobilization and deposition in the Verde River basin, resulting in metal concentrations in water, riverbed sediments, and fish tissues exceeding healthy limits set for aquatic life and human uses. This poses a high ecological and health risk for the region.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Civil
Naga Venkata Satish Laveti, Ashes Banerjee, Suresh A. Kartha, Subashisa Dutta
Summary: The increased accessibility of groundwater in the alluvial plains of the Kosi river basin has altered the crop calendar and irrigation response of farmers, especially in dry years after 2004. A study developed a framework to analyze the spatio-temporal variation in groundwater recharge/extraction patterns and river-aquifer flux exchange due to increasing anthropogenic activities, finding an increasing trend of river to aquifer flux transfer which may have disturbing long-term effects on river flow and stage.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Masimini S. S. Nkosi, Ross N. N. Cuthbert, Naicheng Wu, Purvance Shikwambana, Tatenda Dalu
Summary: Microplastic pollution in aquatic environments is a global concern, but research on freshwater microplastics, especially in the Global South, is limited. To address this knowledge gap, we studied microplastic dynamics in the Crocodile River in South Africa. Microplastics were more abundant during the cool-dry season in surface water and the hot-dry season in sediments. The main source of microplastics was wastewater, particularly from laundry. This pollution has implications for drinking water and aquatic biota in the area.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Lauriane Vilmin, Alexander F. Bouwman, Arthur H. W. Beusen, Wim Joost van Hoek, Jose M. Mogollon
Summary: The impact of phosphorus loading on watersheds is a significant factor in the global phosphorus cycle, with reservoirs playing a crucial role in phosphorus retention but also potentially serving as sources of dissolved inorganic phosphorus. The increased sourcing of dissolved inorganic phosphorus in the Mississippi River basin is offsetting phosphorus retention, especially towards the end of the twentieth century, which could have negative implications for preventing eutrophication.
Article
Environmental Sciences
Maria Fernanda Castro, Cesar Americo Almeida, Cristian Bazan, Juan Vidal, Claudio Daniel Delfini, Liliana Beatriz Villegas
Summary: This study assessed the impact of urban and industrial areas on an urban river by analyzing water and sediments, identifying As, Cu, Cr, Mn, Pb, and Zn as main contributors to sediment pollution. Results showed progressive deterioration of water and sediment quality in sites following industrial parks and domestic discharge areas.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Glaucia Bueno Benedetti Berbel, Marcos Antonio Hortellani, Jorge Eduardo de Souza Sarkis, Vitor Gonsalez Chiozzini, Deborah Ines Teixeira Favaro, Bruno Otero Sutti, Nixon Claudio Sakazaki, Elisabete de Santis Braga
Summary: Platinum, Rhodium, and Palladium concentrations were evaluated in a highly polluted estuary in Brazil affected by industrial activities, traffic, and sewage. High PGE contamination was found in sediments impacted by domestic waste and ferryboat traffic, with no direct correlation between PGE levels and sediment types observed. Pollution indexes indicated significant anthropogenic contamination in the Santos-Sao Vicente Estuarine System, with unique Pd/Pt, Pt/Rh, and Pd/Rh ratios near highways possibly due to deposition processes in road dust, soil, and water.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Daniel Kozar, Xiaoli Dong, Li Li
Summary: Acid rain has been a global environmental issue since the Industrial Revolution, and its detrimental effects on river chemistry recovery in large river basins are often masked by other human activities and changing climate. This study focuses on the recovery of river chemistry from acid rain in the Mississippi River Basin (MRB), the largest river basin in North America. Through the analysis of temporal trends and Bayesian statistical models, the study found evidence of recovery from acid rain in the MRB, with stronger recovery seen in the historically affected eastern region. However, the intensifying effects of other anthropogenic activities and changing climate are hindering the full recovery process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Yulin Chen, Chunxia Jiang, Yile Wang, Ranran Song, Yang Tan, Yuyi Yang, Zulin Zhang
Summary: This study conducted a comprehensive investigation of antibiotic pollution in the Yangtze River, focusing on sedimentary concentrations, sources, environmental fate, and ecological risks. The results revealed the abundance and distribution of different antibiotic categories in the sediments, with fluoroquinolones and tetracyclines being the dominant pollutants. The study also demonstrated the influence of local animal husbandry on antibiotic contamination and highlighted the positive correlation between antibiotics and heavy metals. The findings contribute to a better understanding of antibiotic contamination in the Yangtze River basin and emphasize the need for mitigation and management measures.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Qi'en Ouyang, Juan Liu, Wenhuan Yuan, Xudong Wei, Yanyi Liu, Zhi'an Bao, Yeliang Huang, Jin Wang
Summary: This study used high-precision Tl isotopic compositions to investigate the migration pathway and source apportionment of Tl in sediments from a pyrite mine area in south China. The results showed that anthropogenic Tl sources had the greatest influence on the Tl isotopic fractionation in the sediments. Additionally, a ternary mixing model revealed that waste from pyrite mining activities affected the downstream sediments up to 10 km. These findings highlight the significance of Tl isotopic signature in tracing Tl contamination sources and guiding targeted remediation efforts.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Patrick Chamula Musungu, Fredrick Orori Kengara, David M. K. Ongeri, Mahmood M. S. Abdullah, Balasubramani Ravindran
Summary: The aim of this study was to investigate the impact of anthropogenic activities and seasonality on physico-chemical parameters and heavy metal levels of River Yala within RY Basin of Lake Victoria, as well as the associated ecological risks. The results showed that there were significant differences in the levels of analyzed parameters in water between dry and wet seasons, with the wet season having a greater impact. Additionally, the study revealed the important ecological and restorative functions of wetlands in protecting Lake Victoria from pollution by the river.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Biodiversity Conservation
Yuan Li, Lingchao Fang, Wang Yuanzhu, Wujuan Mi, Li Ji, Zhang Guixiang, Pingheng Yang, Zhongbing Chen, Yonghong Bi
Summary: This study explored the relationship between anthropogenic activities and river trophic status in the tributaries of the Three Gorges Reservoir in China. The results showed significant spatio-temporal variations in trophic status, with the highest levels observed in summer. Quantitative anthropogenic activities were found to explain the eutrophic frequency and eutrophication risk in the tributaries. The findings contribute to a better understanding of the interrelationship between humans and the environment, and provide practical strategies for river environmental restoration.
ECOLOGICAL INDICATORS
(2022)
Article
Multidisciplinary Sciences
Salar Rezapour, Farrokh Asadzadeh, Amin Nouri, Habib Khodaverdiloo, Mohammad Heidari
Summary: This study identified the sources and potential ecological and health risks of heavy metals in river sediments of the Urmia Lake basin in Iran. The analysis revealed varying pollution levels and ecological risks in the sediments, with different heavy metals showing different levels of contamination and risk. Actions to manage and control heavy metal pollution in aquatic-sedimentary ecosystems can be based on the practical information provided by this study.
SCIENTIFIC REPORTS
(2022)
Article
Green & Sustainable Science & Technology
Dandan Liu, Lu Bai, Qi Qiao, Yue Zhang, Xueying Li, Ruonan Zhao, Jingyang Liu
Summary: Anthropogenic phosphorus input has caused eutrophication in the Yangtze River, with livestock contributing the most to annual TP emissions in the Tuojiang River Basin (TJRB). Agricultural, domestic, and industrial emissions also play significant roles. Nonpoint sources contribute significantly more than point sources, with industrial emissions identified as the key source of uncertainty. Effective livestock management practices and facility utilization can help reduce TP emissions into the TJRB. The study provides important data for future pollution control efforts.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Bienvenu K. Mavakala, Severine Le Faucheur, Crispin K. Mulaji, Amandine Laffite, Naresh Devarajan, Emmanuel M. Biey, Gregory Giuliani, Jean-Paul Otamonga, Prosper Kabatusuila, Pius T. Mpiana, John Pote
Article
Microbiology
Amandine Laffite, Pitchouna I. Kilunga, John M. Kayembe, Naresh Devarajan, Crispin K. Mulaji, Gregory Giuliani, Vera I. Slaveykova, John Pote
FRONTIERS IN MICROBIOLOGY
(2016)
Article
Engineering, Environmental
Naresh Devarajan, Thilo Kohler, Periyasamy Sivalingam, Christian van Delden, Crispin K. Mulaji, Pius T. Mpiana, Bastiaan W. Ibelings, John Pote
Article
Chemistry, Multidisciplinary
Monika Mortimer, Naresh Devarajan, Dong Li, Patricia A. Holden
Article
Multidisciplinary Sciences
Naresh Devarajan, Amandine Laffite, Crispin Kyela Mulaji, Jean-Paul Otamonga, Pius Tshimankinda Mpiana, Josue Ilunga Mubedi, Kandasamy Prabakar, Bastiaan Willem Ibelings, John Pote
Article
Geochemistry & Geophysics
Birane Niane, Naresh Devarajan, John Pote, Robert Moritz
JOURNAL OF GEOCHEMICAL EXPLORATION
(2019)
Review
Microbiology
Periyasamy Sivalingam, John Pote, Kandasamy Prabakar
Article
Engineering, Environmental
Dong Li, Laurie C. Van De Werfhorst, Thomas Dunne, Naresh Devarajan, Tania Gomez Ayala, Patricia A. Holden
Article
Biotechnology & Applied Microbiology
N. Devarajan, J. A. McGarvey, K. Scow, M. S. Jones, S. Lee, S. Samaddar, R. Schmidt, T. D. Tran, D. S. Karp
Summary: The study suggests that organic amendments such as composts and cover crops can increase soil microbial diversity and activity, suppress the survival of foodborne pathogens, and contribute to healthy soil. Evaluation of a 27-year experiment showed that the composition of bacterial communities in organic soils can impact the survival of pathogens in soils.
JOURNAL OF APPLIED MICROBIOLOGY
(2021)
Review
Biology
Sandipan Samaddar, Daniel S. Karp, Radomir Schmidt, Naresh Devarajan, Jeffery A. McGarvey, Alda F. A. Pires, Kate Scow
Summary: This article discusses the regulation of pathogens in soil and the impact of soil biota on human and crop pathogens, emphasizing the role of soil microbial diversity in regulating soil-borne pathogens. It also explores the ecological principles and relationships related to soil health and pathogen suppression, evaluating the effects of agricultural management practices on soil pathogen regulation.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Engineering, Environmental
Dong Li, Laurie C. Van De Werfhorst, Brandon Steets, Jared Ervin, Jill L. S. Murray, Avery Blackwell, Naresh Devarajan, Patricia A. Holden
Summary: This study investigated fecal sources impacting two Santa Barbara recreational beaches, identifying gull and dog feces as probable sources to surf zone waters, while consistently detecting HF183 human fecal markers. It also found that swimmer presence correlated with surf zone HF183 detections, providing new explanations for chronic low-level human markers in recreational beach surf zones.
Article
Microbiology
Dong Li, Laurie C. Van de Werfhorst, Brandon Steets, Jared Ervin, Jill L. S. Murray, Naresh Devarajan, Patricia A. Holden
Summary: Microbial source tracking (MST) can pinpoint surf zone fecal indicator bacteria sources, with a study in Goleta, California showing mainly gull sources but also human DNA marker HF183 potentially from watershed runoff. Low levels of human and dog markers were found in creek waters, suggesting possible coastal contamination sources.
FRONTIERS IN MICROBIOLOGY
(2021)
Review
Microbiology
Periyasamy Sivalingam, Kui Hong, John Pote, Kandasamy Prabakar
INTERNATIONAL JOURNAL OF MICROBIOLOGY
(2019)