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171.
172.
In order to contribute to a future waste management policy related to the presence of technologically enhanced natural occurring radioactive material (TENORM) in the Brazilian petroleum industry, the present work presents the chemical composition and the 226Ra and 228Ra content of sludge and scales generated during the offshore E and P petroleum activities in the Campos Basin, the primary offshore oil production region in Brazil.The 226Ra and 228Ra content on 36 sludge and scales samples were determined by gamma-spectrometry. Based on X-ray diffractometry results, a chemical analysis schema for these samples was developed. The results have shown that scales are 75% barium and strontium sulfates, with a mean 226Ra and 228Ra content of 106 kBq kg−1 and 78 kBq kg−1, respectively. On the other hand, sludge samples have a much more complex chemical composition than the scales. The 226Ra and 228Ra content in sludge also varies much more than the content observed in the scales samples and ranged from 0.36 to 367 kBq kg−1 and 0.25 to 343 kBq kg−1, respectively. 相似文献
173.
da Silva Cleber Pinto de Campos Sandro Xavier 《Environmental science and pollution research international》2022,29(41):61870-61880
Environmental Science and Pollution Research - Although anaerobic reactors are an excellent alternative in the treatment of domestic effluents, they have the disadvantage of requiring... 相似文献
174.
Martins Dayse Carvalho da Silva Resende Iasmin Tavares da Silva Bruno José Rocha 《Environmental science and pollution research international》2022,29(28):42384-42403
Environmental Science and Pollution Research - Pesticides have been used to kill pests such as insects, fungi, rodents, and unwanted plants. Since these compounds are potentially toxic to the... 相似文献
175.
Leite Marilaine Cristina Marques de Araujo Maycon Anderson da Silva de Paiva Wesller Camargos Liliane Santos Martins Aline Redondo 《Environmental science and pollution research international》2022,29(5):6900-6910
Environmental Science and Pollution Research - The indiscriminate use of fertilizers and chemical pesticides can lead to boron contamination of the soil. Decontamination in general is expensive and... 相似文献
176.
da Silva Fabiano Santana Luna Carlos Bruno Barreto Siqueira Danilo Diniz da Silva Barbosa Ferreira Eduardo Araújo Edcleide Maria 《Journal of Polymers and the Environment》2022,30(3):1028-1044
Journal of Polymers and the Environment - This work aimed to investigate the biopolyethylene (BioPE)/wood powder (WP) composites compatibilized with polyethylene-grafted maleic anhydride (PE-g-MA),... 相似文献
177.
Senra Elaine M. da Silva Antônio E. F. A. Visconte Leila L. Y. Silva Ana L. N. Pacheco Elen B. A. V. 《Journal of Polymers and the Environment》2022,30(9):3761-3778
Journal of Polymers and the Environment - The paper studied the influence of a catalyst, comparing it with its traditional counterparts, in the process of obtaining a polyethylene terephthalate... 相似文献
178.
Barbosa Rennan Felix da Silva Zanini Noelle Cardoso Mulinari Daniella Regina Rosa Derval dos Santos 《Journal of Polymers and the Environment》2022,30(9):3852-3864
Journal of Polymers and the Environment - Exposure to potentially toxic metallic elements (PTME) released in watercourses by industries results in irreversible damage to living beings or even... 相似文献
179.
Kevin V. Thomas Felipe M. Araújo da Silva K.H. Langford Afonso D. Leão de Souza L. Nizzeto A.V. Waichman 《Journal of the American Water Resources Association》2014,50(2):302-308
Pharmaceuticals and illicit drugs are contaminants that are generally ubiquitous in wastewater treatment plant effluents with their release into the environment being well understood in North America, Europe, and Asia. There is, however, less information on the release of human pharmaceuticals and illicit drugs from regions undergoing rapid land use, economical, and social changes, such as Brazil. This encompasses many areas in the tropical zone where releases of emerging contaminants may impact pristine, bio‐diversity rich ecosystems. In this study, the occurrence of human pharmaceuticals and the illicit drug cocaine was determined in the Rio Negro and two of its tributaries that receive large amounts of untreated sewage, the Igarapé Mindu and the Igarapé do 40, passing through the city of Manaus, Brazil. In addition to cocaine and its metabolite, benzoylecognine, propranolol, diclofenac, amitriptyline, carbamazepine, carbamazepine‐epoxide, citalopram, metoprolol, carisoprolol, and sertraline were all detected in two urban tributaries at low ng/l concentrations similar to those typically found in urban surface waters. Concentrations in the Rio Negro were typically lower than detection limits due to the large level of dilution, although traces of a range of pharmaceuticals were detected in the Rio Negro in proximity of the confluence of the urban streams. The data represent new information on the emissions of pharmaceuticals from a newly industrialized region of Brazil. 相似文献
180.
Princewill C. Ogbonna Chibuike Odukaesieme Jaime A. Teixeira da Silva 《Chemistry and Ecology》2013,29(7):595-603
This study assessed the distribution of heavy metals in soil and their subsequent accumulation in plants at a site at Umudike, Nigeria, that had been contaminated by agrochemicals. Soil and plant samples were analysed for zinc (Zn), chromium (Cr) and cadmium (Cd). The highest concentrations of Zn (251.50 mg/kg) and Cd (61.33 mg/kg) were obtained at a soil depth of 0–10 cm. The highest concentrations of Zn (16.52 mg/kg), Cd (27.12 mg/kg) and Cr (164.07 mg/kg) were accumulated by Baphia nitida. The levels of Cd, Cr and Zn in soil were 27.97–61.33, 24.97–45.43 and 148.57–251.50 mg/kg, and their concentrations in B. nitida were 16.18–27.13, 97.99–164.07 and 0.10–16.52 mg/kg, respectively. There were significant correlations between Cd and Cr and Cd and Zn in soil, as well as between Cd and Cr in plants. The concentration of Cd in soil reflected a state of pollution relative to Dutch criteria for soil and the FAO/WHO Codex Alimentarius Commission. 相似文献