Article
Environmental Sciences
Heinrich T. J. Dahms, Gavin P. Tweddle, Richard Greenfield
Summary: This study investigated the levels of microplastics in water, sediment, and fish in the upper Vaal River in South Africa. Microplastics were found in all three mediums, and the shape or size of the microplastics did not affect their ingestion by fish.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Marilie Pretorius, Annemarie Avenant-Oldewage
Summary: The study found that water quality influenced by metal pollution negatively impacts the infection of Lamproglena clariae, with areas having higher metal concentrations and organic pollution levels showing lower parasite infection rates.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Environmental Sciences
Moussa Attia Moussa, Hanan Ramadan H. Mohamed, Amr Adel Abdel-Khalek
Summary: The impacts of the Batts drain on two fish species were evaluated using multiple biomarkers. Elevated metal concentrations and various physiological and histological alterations were observed in the exposed fish. O. niloticus demonstrated greater resistance to pollution compared to C. gariepinus.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Veterinary Sciences
Hamdy A. M. Soliman, Sally M. Salaah, Mohamed Hamed, Alaa El-Din H. Sayed
Summary: Microplastics and lead have varying impacts on fish, including effects on hematological, biochemical, and inflammatory signals, as well as changes in antioxidant enzyme levels.
FRONTIERS IN VETERINARY SCIENCE
(2023)
Article
Environmental Sciences
Kenneth Chukwuemeka Nwizugbo, Matthew Chidozie Ogwu, George E. Eriyamremu, Chidozie Michael Ahana
Summary: Research shows that crude oil contamination has significant effects on the survival strategy and cellular metabolism of African sharptooth catfish, potentially leading to delayed development and health risks.
Article
Environmental Sciences
Faddrine Holt Jang, Changi Wong, Jenny Choo, Edwin Sien Aun Sia, Aazani Mujahid, Moritz Muller
Summary: This study aimed to quantify the transfer of trace metals from microplastics to catfish and assess its impact on the host's microbiome. The results showed that biodegradable polylactic acid transferred more metals to catfish and increased Vibrio counts in the intestines compared to polyamide 12. Trace metal accumulation was highest in the gills, followed by the liver, intestines, and edible muscles. Additionally, the study highlights the potential environmental threat posed by biodegradable polymers.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Abraham Addo-Bediako
Summary: Many freshwater ecosystems globally are facing chemical pollution from natural and human sources. The Olifants River Basin in South Africa is experiencing degradation due to various activities, which may increase the accumulation of toxic chemicals in sediments. This study assessed the contamination of several trace metals in sediments collected from different rivers in the basin. The results showed significant differences in metal concentrations among study sites and rivers, with some sediments being severely enriched and extremely contaminated with certain metals. This pollution may pose a risk to aquatic biota and humans, particularly rural communities relying on these rivers for drinking water. The findings provide important baseline information for managing and controlling metal pollution in the Olifants River Basin.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Oluwatosin Adetola Arojojoye, Ademola Adetokunbo Oyagbemi, Olufunke Eunice Ola-Davies, Racheal Oluwabukola Asaolu, Zainab Olabanji Shittu, Barakat Adebukola Hassan
Summary: Petroleum exploration in the Niger Delta region of Nigeria has led to contamination and destruction of the ecosystem, resulting in increased levels of oxidative stress markers and alterations in antioxidant status in fish organs. The frequency of micronucleated polychromatic erythrocytes was significantly higher in fish samples from polluted rivers compared to the control, indicating pollution mainly by oil spillage and industrial activities in these rivers.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Rui Min, Kai Ma, Hongwei Zhang, Jiaqian Zhang, Siyi Yang, Tianhong Zhou, Guozhen Zhang
Summary: This study systematically investigated the distribution of microplastics (MPSs) in the surface water and bank sediments of Liujiaxia Reservoir in the upper Yellow River for the first time. The results showed that the main types of MPSs in the reservoir were PET, PS, and PP, and the abundance ranged from 4.48 to 12.09 item/L in the surface water and from 447.27 to 1543.80 item/kg (dry weight) in the bank sediments. The study provides valuable data for future pollution control and management in the reservoir area.
Article
Environmental Sciences
Yi-Wen Shen, Chang-Xian Zhao, Hao Zhao, Shuo-Fei Dong, Jiao-Jiao Xie, Mei-Ling Lv, Chun-Gang Yuan
Summary: This study analyzed the concentrations of antimony (Sb) and other elements, as well as the lead isotopic compositions in PM2.5. The results showed that the Sb concentration in PM2.5 had seasonal variation and was primarily from anthropogenic sources. The correlation between antimony and lead pollution indicated that lead isotopes could be used as a tracer for antimony pollution in air.
ENVIRONMENTAL POLLUTION
(2023)
Article
Multidisciplinary Sciences
Noa Tang Sylvie Desiree, Ekoa Bessa Armel Zacharie, Messina Therese Raissa, Onana Vincent Laurent, Ndjigui Paul-Desire
Summary: This study focuses on the risk assessment of trace metals in the Mefou River sediments located at Yaounde, West-Africa. The results suggest that the sediments of the Mefou River may be affected by low to moderate pollution levels, with Ni, Cu, Pb, and Zn mainly influenced by human sources and V and Cr partially derived from human activities.
Article
Microbiology
Angel Valverde, Errol D. Cason, Alba Gomez-Arias, Derya Bozkale, Danny Govender, Eddie Riddell, Don Cowan
Summary: Human activities such as agriculture and mining are major contributors to global water pollution. This study used next-generation sequencing to investigate the impact of chronic pollution from multiple sources on bacterial and archaeal communities in water and sediments from the Olifants River catchment in South Africa. The findings showed that pollution did not affect alpha diversity but influenced microbial composition and predicted functions based on taxonomy. Certain prokaryotic taxa and functional groups were identified as indicators of pollution levels, with specific taxa like Flavobacterium sp. and Thiobacillus sp. serving as indicators in water and sediments respectively. Ultimately, this information could aid in the development of microbial indicators for assessing water quality degradation.
ARCHIVES OF MICROBIOLOGY
(2021)
Article
Ecology
Emmanuel Ogueji, Joseph Nwakpa, Joshua Ekpenyong, Michael Olaolu, Abubaka Yaji, Irom Okey, Gabriel Amana, Chukwunonso Elo, Ugochinyere Agbo
Summary: Emamectin benzoate (EMB) is a potent neurotoxic pesticide widely used in agriculture and aquaculture in Nigeria. However, there is limited knowledge about its toxicological impact on C. gariepinus fish in Nigeria. This study aimed to determine its 96 h LC50, safe level in aquatic media, histological impact on fish liver and gill, and hematological changes in blood parameters. The results showed that the 96 h LC50 was 0.34 mg L-1 and the safe level of EMB was 0.034 mg L-1. Exposure to EMB caused dose-dependent liver degenerations and changes in gill morphology. It also led to alterations in the fish's hematological profile. These findings highlight the harmful effects of EMB on C. garipinus fish and emphasize the importance of monitoring and limiting its use to protect fish health in aquatic environments.
Article
Environmental Sciences
Hamed Ramyar, Mehdi Baradaran-Firouzabadi, Ali Reza Sobhani, Hamid Reza Asghari
Summary: Acid rain is an influential environmental factor that transports heavy metals, including lead, from the atmosphere to the surface of the earth and plants. This study demonstrates that foliar application of sulfur, serine, and glutamine can reduce the negative effects of lead stress on green bean plants, improving their physiological functions and increasing yield and quality.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geochemistry & Geophysics
Chipeng Zhang, Tao Liu, Zeyan Yang, Pan Wu, Kaixuan Zhang, Shuang Chen
Summary: Antimony and arsenic, toxic heavy metals of the same group, have similar but different properties, and their migration in water can impact the ecological environment. Deposition and reductive release processes of Fe in a polluted reservoir were found to influence the behavior of Sb and As in the environment. Adsorption by suspended particles, particularly in the bottom layer, can effectively purify dissolved Sb in water.
APPLIED GEOCHEMISTRY
(2022)