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131.
Cosate de Andrade Marina Fernandes Loureiro Hugo Campos Sarantopóulos Claire Isabel Grígoli de Luca Morales Ana Rita 《Journal of Polymers and the Environment》2021,29(10):3288-3301
Journal of Polymers and the Environment - This work assesses the influence of the plasticizer polyethylene glycol (PEG) on the compatibilization of poly (butylene adipate-co-terephthalate) (PBAT)... 相似文献
132.
Tatiana M. Tsagaraki George PetihakisKostas Tsiaras George TriantafyllouManolis Tsapakis Gerasimos KorresGeorge Kakagiannis Constantin FrangoulisIoannis Karakassis 《Ecological modelling》2011,222(14):2512-2523
An ecosystem modelling approach was used in two areas of the Eastern Mediterranean in order to examine the effects of aquaculture on the ecology of the water column. Aquaculture expansion to meet demands of a growing population is followed by concerns about keeping impacts within socially acceptable limits. Primarily the study aimed at investigating the fate of nutrients from finfish culture and evaluating changes in chemical and biological characteristics of the water body. The model used, Aquaculture Integrated Model (AIM), is based on a complex generic biogeochemical model coupled to a 3D hydrodynamic model. Selected areas included a finfish farm in the Northern Aegean, Greece and an aquaculture development area in Vassiliko, Cyprus. Ecosystem effects were evaluated on the basis of scale and importance. Scenarios under different production levels and hydrodynamic conditions were explored at the sites. Model results showed that farm discharges are rapidly dispersed from their point source in addition to a tendency for effluents to accumulate at distances not normally associated directly with farming activity. The wide range of parameters available in the model helped identify parameters more likely to be affected by the farming activities. There was a satisfactory correlation between observed and predicted model outputs. This study demonstrates the importance of approaching aquaculture impacts at an ecosystem level and the utility of a modelling tool to this end. 相似文献
133.
Chi-Chuan Kan Mannie C Aganon Cybelle Morales Futalan Maria Lourdes P Dalida 《环境科学学报(英文版)》2013,25(7):1483-1491
The adsorption of Mn2+ onto immobilized Mn-oxide and Fe-oxide adsorbent such as manganese oxide-coated sand1 (MOCS1), manganese oxide-coated sand2 (MOCS2), iron oxide-coated sand2 (IOCS2), and manganese and iron oxide-coated sand (MIOCS) was investigated. The effects of pH (5.5 to 8.0) and temperature (25 to 45℃) on the equilibrium capacity were examined. Equilibrium studies showed that there is a good fit with both Freundlich and Langmuir isotherm, which indicates surface heterogeneity and monolayer adsorption of the adsorbents. Kinetic data showed high correlation with the pseudo second-order model, which signifies a chemisorption-controlled mechanism. The activation energies, activation parameters (ΔG*, ΔH*, ΔS*), and thermodynamic parameters (ΔG0, ΔH0, ΔS0) confirmed that adsorption with MIOCS was endothermic and more spontaneous at higher temperature while an opposite trend was observed for the other adsorbents. Thermodynamic studies showed that adsorption involved formation of activated complex, where MOCS1 and MIOCS follow a physical-chemical mechanism, while MOCS2 and IOCS2 follows purely chemical mechanism. 相似文献
134.
Bauer Tatiana V. Pinskii David L. Minkina Tatiana M. Shuvaeva Victoria A. Soldatov Alexander V. Mandzhieva Saglara S. Tsitsuashvili Victoria S. Nevidomskaya Dina G. Semenkov Ivan N. 《Environmental geochemistry and health》2022,44(2):335-347
Environmental Geochemistry and Health - Modeling metal sorption in soils is of great importance to predict the fate of heavy metals and to assess the actual risk driven from pollution. The present... 相似文献
135.
Post-Agricultural Succession in El Petén, Guatemala 总被引:1,自引:0,他引:1
Bruce G. Ferguson‡ John Vandermeer† Helda Morales Daniel M. Griffith† 《Conservation biology》2003,17(3):818-828
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Contamination of edible plants by toxic metals is a threat for human health. We applied for the first time applied the non-destructive
X-ray fluorescence spectrometry (XRF) to determine concentrations of heavy metals, i.e., Fe, Ti, Mn, Cr, Cu, Ni, Zn, Sr and
Ba in plant Hemerocallis minor Miller and soils. Because this plant is used in folk medicine, the metal content assessment is important for specifying relevance
of application to produce drugs. This paper considers the distribution of elements between different parts of plant (rhizome,
stalk, leaves and flowers). The contents of metals were determined as varying in flowers and leaves depending on the time
of sampling. The acquired concentrations of elements have been compared with toxic levels provided in literature. 相似文献