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261.
Reddy Maddigapu P Minero C Maurino V Vione D Brigante M Mailhot G 《Chemosphere》2010,81(11):1401-1406
Anthraquinone-2-sulphonate (AQ2S) under UVA irradiation is able to oxidise nitrite to (·)NO(2) and to induce the nitration of phenol. The process involves the very fast reactions of the excited triplet state (3)AQ2S(*) and its 520-nm absorbing exciplex with water, at different time scales (ns and μs, respectively). Quinones are ubiquitous components of coloured dissolved organic matter (CDOM) in surface waters and AQ2S was adopted here as a proxy of CDOM. Using a recently developed model of surface-water photochemistry, we found that the oxidation of nitrite to (·)NO(2) by (3)CDOM(*) could be an important (·)NO(2) source in water bodies with high [NO(2)(-)] to [NO(3)(-)] ratio, for elevated values of column depth and NPOC. 相似文献
262.
Abstract A simple technique was demonstrated for determining the potential for synthetic organics to stress microbial populations. Oxidized Crowley and Cecil soil materials were amended with varying concentrations of 2,4‐D and methyl parathion, flooded, and then analyzed for changes in pH, redox potential, and levels of soluble plus exchangeable Fe, Mn, and Zn, all of which may be directly or indirectly influenced by the activity of soil microorganisms. At the concentrations tested (up to 75 ppm), there was little effect of 2,4‐D, but methyl parathion apparently did affect microbial activity contributing to changes in the measured soil properties upon flooding. This approach may be a useful technique for screening various compounds for their potential to stress microbial activity that, for many researchers, would be easier than direct observations of microbial parameters such as population numbers and classifications, and enzyme levels. 相似文献
263.
Halogenated 1'methyl-1,2'-bipyrroles (MBPs) have been identified worldwide in marine mammals. Here we present the tentative identification of previously undetected MBP congeners in Delpinus delphis blubber using gas chromatography/electron capture negative ion mass spectrometry (GC/ECNI-MS) and comprehensive two-dimensional gas chromatography/time of flight mass spectrometry (GCxGC/TOF-MS). This is the first report of 26 congeners. The presence of numerous partially halogenated congeners suggests that they are either biosynthesized concomitantly with their perhalogenated counterparts or that their dehalogenation products can also bioaccumulate. The newly found compounds fit the geographic trend that has been previously noted. That is, samples from the Atlantic Ocean are dominated by the more brominated congeners while those from the Pacific are dominated by the more chlorinated congeners. 相似文献
264.
Zheng Wenting Kuchukulla Ratnakar Reddy Xu Xiangning Zhang Dandan Zhou Lihong Zeng Qingle 《Journal of Polymers and the Environment》2022,30(2):653-665
Journal of Polymers and the Environment - How to efficiently and economically remove heavy metals from sewage has been a huge challenge in the world. This article reports on an adsorbing material... 相似文献
265.
Reddy Banka Kanda Kishore Bhuvaneswari Kaithamalai Geetha Padmanaban Thamilarasi Natarajan Suganthi Angappan Paramasivam Mariappan 《Environmental science and pollution research international》2022,29(50):75790-75804
Environmental Science and Pollution Research - Field and laboratory experiments were conducted to study the effect of simple decontamination methods and processing on imidacloprid, dimethoate, and... 相似文献
266.
Raghutla Chandrashekar Chittedi Krishna Reddy 《Environmental science and pollution research international》2022,29(7):9707-9721
Environmental Science and Pollution Research - In the development concern, all countries are started increasing production of energy across the world. All countries have started expansion of access... 相似文献