Article
Environmental Sciences
Brigid Carr, Pere Masque, Carlos M. Alonso-Hernandez, David Huertas, Philippe Bersuder, Imma Tolosa
Summary: This study analyzed sediment from Cienfuegos Bay, Cuba to examine the occurrence of organic pollutants from 1990 to 2015. The results showed the presence of regulated contaminants such as PCBs, OCPs, and PBDEs, with a decline in PCB contamination since 2007. Emerging contaminants, including PAEs, OPEs, and aHFRs, showed sharp increases, possibly due to the growing global usage of flame retardants and plasticizer additives. Local sources, such as a plastic recycling plant and urban waste outfalls, may contribute to these trends. Further research is needed to understand the influx of these emerging contaminants.
Article
Materials Science, Paper & Wood
Harshita Gupta, Kulwinder Kaur, Raghubir Singh, Varinder Kaur
Summary: A chitosan Schiff base (SB@Chitosan) was synthesized and its structural properties were analyzed through various techniques. The fluorescence emission signal of SB@Chitosan was quenched when exposed to e-waste toxins, serving as a probe for their recognition and quantification. The density-functional theory provided insights into the interaction mechanisms between SB@Chitosan and heavy metals.
Article
Environmental Sciences
Andrew D. W. Tongue, Kim J. Fernie, Stuart Harrad, Daniel S. Drage, Rona A. R. McGill, S. James Reynolds
Summary: This study quantified and compared legacy and alternative brominated flame retardants (BFRs) in the eggs of three gull species in a remote landfill in western Scotland. Despite high detection frequencies, the concentrations of hexabromocyclododecanes did not exceed those of polybrominated diphenyl ethers, indicating multiple exposure routes for gulls frequenting landfills through their diet, behavior, preening, dermal exposure, and likely inhalation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Zijuan Peng, Mingwu Shao, Miao Yu, Boling Lu, Xingchen Zhao, Penghui Li, Shanjun Song, Qian Liu, Tao Zhou, Qinghe Zhang
Summary: A novel approach using solubility parameters as indicators for the extraction of additives in plastic products was developed and verified in various plastic materials. The results demonstrated the accuracy and feasibility of this method for field sample analysis.
ANALYTICAL CHEMISTRY
(2021)
Article
Environmental Sciences
Bernard Robaire, Geraldine Delbes, Jessica A. Head, Vicki L. Marlatt, Christopher J. Martyniuk, Stephane Reynaud, Vance L. Trudeau, Jan A. Mennigen
Summary: Studies have mainly focused on the effects of EDCs on adult males and females, but exposure of mature or developing gametes can lead to multigenerational and transgenerational effects. By synthesizing knowledge across vertebrate species, potential mechanisms of EDC effects are discussed, and recommendations for advancing the field are proposed.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Nadeem Ali, Muhammad Imtiaz Rashid, Nabil A. Alhakamy, Sultan Hassan Alamri, Syed Ali Musstjab Akber Shah Eqani
Summary: In this study, the levels of flame retardants and phthalates in indoor household dust during the COVID-19 lockdown period in Jeddah, Saudi Arabia, were analyzed. The results showed high concentrations of these chemicals, particularly DEHP. Saudi children were found to be exposed to DEHP at levels exceeding the reference dose, indicating a risk to their health. This study highlights the increased indoor pollution during the lockdown period and the potential health consequences.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Leila Khani, Leonardo Martin, Lukasz Pulaski
Summary: Flame retardants (FRs) are used to prevent fire spread, but recent research has shown their disruptive effects on biological processes such as signaling pathways, genome stability, reproduction, and immune system function. This review summarizes studies on the impact of major groups of FRs on animals and humans, focusing on their modes of action at the cellular, tissue, and organ levels. The article also highlights the damaging effects of FRs on membrane integrity, DNA, gene expression, cell cycle, and cell death.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Hansel David Burgos Melo, Juliana de Souza-Araujo, Laura Geraldine Benavides Garzon, Joao Carlos Marcedo, Rafael Cardoso, Sandro Donnini Mancini, Stuart Harrad, Andre Henrique Rosa
Summary: Brominated flame retardants (BFRs), widely used in polymeric products like electronic equipment, have been banned in many countries due to their adverse health impacts and environmental persistence. However, research on the presence of these contaminants, particularly in waste electronic equipment, is limited in Brazil. This study detected polybrominated diphenyl ethers (PBDEs) in waste EEE samples in the metropolitan region of Sorocaba, Sao Paulo, Brazil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Nadeem Ali, Iqbal M. I. Ismail, Sultan H. Alamri, Nabil A. Alhakamy, Ahmed Summan, Mohammad Rehan, Balqees Sulaiman Alshareef, Nisreen Rajeh, Syed Ali Musstjab Akber Shah Eqani
Summary: Organophosphate flame retardants (OPEs) and phthalates are widely present in indoor environments, particularly in dust and air samples from children's bedrooms in households in Jeddah, Saudi Arabia. Significant levels of DEHP and DnBP were found in indoor dust, while TPhP was the major OPEs present. More research is needed to explore the potential health risks associated with these chemicals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Jessie P. Buckley, Jordan R. Kuiper, Deborah H. Bennett, Emily S. Barrett, Tracy Bastain, Carrie Breton, Sridhar Chinthakindi, Anne L. Dunlop, Shohreh F. Farzan, Julie B. Herbstman, Margaret R. Karagas, Carmen J. Marsit, John D. Meeker, Rachel Morello-Frosch, Thomas G. O'Connor, Megan E. Romano, Susan Schantz, Rebecca J. Schmidt, Deborah J. Watkins, Hongkai Zhu, Edo D. Pellizzari, Kurunthachalam Kannan, Tracey J. Woodruff
Summary: Prenatal chemical exposures can affect maternal and child health, but routine biomonitoring does not cover many industrial chemicals. A study of 171 pregnant women in the US and Puerto Rico found widespread exposures to both common and understudied chemicals in this diverse population, with higher concentrations of certain chemicals in Hispanic women.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Katrin Vorkamp, Argelia Castano, Jean-Philippe Antignac, Luis D. Boada, Enrique Cequier, Adrian Covaci, Marta Esteban Lopez, Line S. Haug, Monika Kasper-Sonnenberg, Holger M. Koch, Octavio Perez Luzardo, Agnese Osite, Loic Rambaud, Maria-Teresa Pinorini, Gabriele Sabbioni, Cathrine Thomsen
Summary: The major purpose of human biomonitoring is to map and assess human exposure to chemicals. The European initiative HBM4EU has prioritized seven substance groups and two metals. Suitable biomarkers, human matrices, and analytical methods were selected based on scientific literature for each substance group or metal to work towards comparable European-wide data.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Biology
Tessa Steiniche, Shaorui Wang, Emily Chester, Richard Mutegeki, Jessica M. Rothman, Richard W. Wrangham, Colin A. Chapman, Marta Venier, Michael D. Wasserman
Summary: Through non-invasive biomonitoring, we found that 97 chemical pollutants were present in the feces of four primate species in Kibale National Park, Uganda (chimpanzees, olive baboons, red colobus, and red-tailed monkeys), and they were positively associated with fecal hormone metabolites of cortisol and estradiol. The results indicated that organochlorine pesticides and organophosphate esters were positively correlated with cortisol in adult females, and organochlorine pesticides and brominated flame retardants were positively correlated with cortisol in juveniles. These findings suggest that cumulative pesticides and flame retardants can disrupt endocrine function in these primate populations, which may have implications for their development, metabolism, and reproduction. Additionally, our study demonstrates the importance of feces as a non-invasive matrix for examining pollutant-hormone associations in wild primates and other critical wildlife populations.
Article
Chemistry, Analytical
Boris Santiago Avila, Mateus Castaneda, Gustavo A. Penuela
Summary: The study found low concentrations of PBDEs in shrimps and animal origin oils commercialized and consumed in Medellin, Colombia, indicating that they are not a significant source of exposure to the population of the city. Continuing to analyze PBDEs in foods is important to ensure the innocuity and safety of the food consumed by the population.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Review
Environmental Sciences
Linyan Zhu, Parvaneh Hajeb, Patrik Fauser, Katrin Vorkamp
Summary: Several widely used chemicals have been identified as endocrine-disrupting chemicals (EDCs), which may pose a potential risk to humans. This study reviewed the occurrence of these EDCs in indoor dust and their resulting human exposure. While some banned or restricted EDCs are still detected in indoor dust, new alternatives of EDCs have also been found. The study highlights the importance of indoor dust as a significant pathway for human exposure to EDCs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Huijun Su, Shaobo Shi, Ming Zhu, Jianhua Li, Guanyong Su
Summary: A method to quantify liquid crystal monomers (LCMs) in sediment samples was developed and LCMs were found in samples from rivers, Taihu Lake, and e-waste recycling sites, providing initial evidence for their occurrence in sediment samples.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Agricultural Engineering
K. O. Sodeinde, A. M. Ojo, S. O. Olusanya, O. S. Ayanda, A. O. Adeoye, T. M. Dada, O. S. Lawal
Summary: In this study, native cellulose was extracted from flamboyant fruit pods and subsequently modified to obtain carboxyl methyl cellulose and cellulose acetate under acidic conditions. The modified cellulose showed reduced structural crystallinity, altered surface morphology, and improved thermal stability.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Review
Environmental Sciences
O. H. Aremu, C. O. Akintayo, E. B. Naidoo, S. M. Nelana, O. S. Ayanda
Summary: Environmental pollution is a global issue, with wastewater treatment posing a significant challenge. Nanotechnology offers promising solutions for removing pollutants in water using nano-sized materials.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
G. O. Olutona, I. A. Fakunle, R. A. Adegbola
Summary: The use of agricultural pesticides and fertilizers has increased the concentration of organochlorine pesticide residue and heavy metals in vegetables sold in market. The presence of these residues may lead to neurological, reproductive, and immune system disorders in humans through food consumption.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Cecilia O. Akintayo, Omolola H. Aremu, Wilfred N. Igboama, Simphiwe M. Nelana, Olushola S. Ayanda
Summary: The study found that the combination of UV light and IONPs is more effective in removing COD from synthetic petroleum wastewater compared to using them independently. Under the conditions of UV light at a wavelength of 254 nm, pH of 8, and 1.0 g of IONPs, the COD removal rate increased significantly from 10.5% to 95.5%.
Article
Engineering, Environmental
T. A. Bolaji, E. G. Olumayede, A. M. Ojo
Summary: This study investigated water samples from Miocene reservoirs and seawater samples used for water injection in the offshore Niger Delta, revealing potential risks of corrosion and scaling. Different metals showed varying corrosion rates, with steel exhibiting the highest rate. Adequate treatment is necessary to mitigate the potential severe corrosion risks associated with the use of seawater samples as injection waters.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Adebayo A. Adeniyi, Joy N. Adeniyi, Emmanuel G. Olumayede
Summary: High levels of volatile or semivolatile organic chemicals are released annually into the atmosphere. Hydroxyl radical oxidation is an efficient method for removing anthropogenic pollutants from the atmosphere. This computational study investigated the mechanism of aldehyde removal from the atmosphere through hydrogen abstraction by hydroxide radicals. The results showed that the abstraction of hydrogen from aldehyde is both thermodynamically and kinetically favorable, with aromatic aldehydes being more kinetically favorable compared to other types of aldehydes.
STRUCTURAL CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Olusola S. Amodu, Moradeyo O. Odunlami, Joseph T. Akintola, Tunde V. Ojumu, Olushola S. Ayanda
Summary: In this study, banana peel extract was used as an environmentally friendly corrosion inhibitor for mild steel in hydrochloric acid. The inhibition efficiency was assessed by monitoring the pH of the acid solution and the evolution of hydrogen gas, and optimized using response surface methodology and artificial neural network. The results showed that the concentration of the extract had an impact on the corrosion inhibition efficiency, and the optimum conditions were determined. Both RSM and ANN were found to be effective optimization techniques, with ANN providing accurate predictions even with limited data.
Article
Polymer Science
Samuel O. Olusanya, Sunday M. Ajayi, Kehinde O. Sodeinde, Dele. P. Fapojuwo, Michael O. Atunde, Alex E. Diduyemi, Emmanuel G. Olumayede, Olayide S. Lawal
Summary: This study investigates the extraction and green hydrophobic modification of cellulose from oil palm waste using aqueous medium. Cellulose is isolated from empty oil palm bunch (EOPB) and palm frond (PF), respectively, and modified in an aqueous medium using benzoyl chloride to produce cellulose benzoate esters. Characterization techniques include X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The green synthesis techniques using water and sodium hydroxide as reaction medium are fast, safe, cost-effective, and produce pure cellulose products with well-preserved structure. The modified cellulose can be used commercially and the green synthesis technique overcomes environmental challenges associated with other chemical modification methods.
Article
Chemistry, Multidisciplinary
Olushola Sunday Ayanda, Blessing Oluwatobi Adeleye, Omolola Helen Aremu, Folasade Busayo Ojobola, Olayide Samuel Lawal, Olusola Solomon Amodu, Oyedele Oyebamiji Oketayo, Michael John Klink, Simphiwe Maurice Nelana
Summary: The presence of emerging pollutants like pharmaceutical compounds in the environment is currently a concern. Advanced oxidation processes, specifically UV light combined with zinc oxide nanoparticles and/or acha waste, showed to be more effective than UV alone for the removal of metronidazole. The addition of a catalyst enhanced the degradation of metronidazole from 41.0% up to 86.1%.
INDONESIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Tunmise Adigun Adeyemi, Godwin Oladele Olutona, Cecilia Akintayo
Summary: The depletion of fossil fuel supplies and the environmental concerns have led to the search for acceptable alternative fuels, such as biodiesel. This study compared the quality of biodiesel produced from palm kernel oil (PKO), castor seed oil (CSO), and tiger nut oil (TGO) to international standards. The results showed that all three feedstocks had acceptable biodiesel quality, with PKO, TGO, and CSO biodiesels containing methyl petroselinate, oleic acid, and ricinoleic acid as the most prevalent fatty acids, respectively.
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2023)
Correction
Chemistry, Multidisciplinary
Tunmise Adigun Adeyemi, Godwin Oladele Olutona, Cecilia Akintayo
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Sunday M. Ajayi, Samuel O. Olusanya, Kehinde O. Sodeinde, Emmanuel G. Olumayede, Olayide S. Lawal, Alex E. Didunyemi, Michael O. Atunde, D. P. Fapojuwo
Summary: This study investigated Pickering emulsions stabilized by hydrophobically modified cellulose from oil palm frond (OPF). The modified cellulose showed improved thermal stability and surface degradation, leading to stable Pickering emulsions. The findings suggest that modified cellulose derived from oil palm frond holds promise for various applications in food, drug delivery, encapsulation, and biomedicine.
CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS
(2022)
Correction
Engineering, Chemical
Mojtaba Afsharnia, Ali Naghizadeh, Azam Karimi, Borhan Mansouri, Olushola Sunday Ayanda
DESALINATION AND WATER TREATMENT
(2022)
Article
Agronomy
Toluwase Hezekiah Fatoki, Cecilia O. Akintayo, Omodele Ibraheem
Summary: Olive oil's bioactive constituents, such as oleic acid, linoleic acid, and tyrosol, have various potential pharmacological effects with multiple targets. These components show promise in modulating enzymes, receptors, and transcription factors, highlighting their importance in potential therapeutic applications.
OCL-OILSEEDS AND FATS CROPS AND LIPIDS
(2021)