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排序方式: 共有87条查询结果,搜索用时 31 毫秒
71.
Mohamed Hdi Romdhana Didier Lecomte Bruno Ladevie Caroline Sablayrolles 《Process Safety and Environmental Protection》2009,87(6):377-386
The sewage sludge from wastewater treatment plant is a potential source of infectious organism. The number and type of pathogens in sludge depends on various factors namely, the wastewater source, the type of treatment plant, and other environmental factors such as the biological medium offered by the sewage sludge. The principal sludge-borne diseases are presented followed by discussion on biological aspect of growth and occurrence. The overall objective of this work is to estimate kinetic reduction of pathogen population in sludge during different thermal-drying process including: the agitated conductive drying, drum drying, solar drying, and fry-drying. The temperature curves were reported from literature except frying data which were determined in experiment. In order to apply the temperature influence on pathogens population, kinetic parameters for the thermal inactivation (D, z-values) were chosen from literature. Values of concentrations of each pathogen were also extracted from scientific review of pathogens in bio-solids. This study conducted to resolve the survival kinetic of Hepatitis A viruses. The result showed that a concentration of 7 × 104 cfu/100 ml initially present in the sewage sludge is significantly reduced during the heat drying processes except the solar plant. The sewage sludge is completely disinfected when heated for 20 min, 10 min, and 10 s, respectively, during the agitated conductive process, vacuum fry-drying, and drum drying process. 相似文献
72.
Rousseau Jean-François Orange Didier Habich-Sobiegalla Sabrina Van Thiet Nguyen 《Regional Environmental Change》2017,17(8):2409-2419
Regional Environmental Change - Research on hydropower development has shown that a diversity of social and environmental impacts of dams is distributed unevenly among various state and corporate... 相似文献
73.
Natalie Amoin Kouamé Didier Robert Valérie Keller Nicolas Keller Charlotte Pham Patrick Nguyen 《Environmental science and pollution research international》2012,19(9):3727-3734
Introduction
This study of photocatalytic degradation of wastewater was carried out in alveolar cell ??-SiC foam-structured photocatalytic reactors working in a recirculation mode. The immobilization of TiO2 on ??-SiC foams was efficiently obtained through a sol?Cgel technique in acidic conditions.Discussion
In order to optimize degradation yields obtained by the foam-structured prototype reactor for the photocatalytic water treatment, the operating conditions of the photoreactor have been investigated and the efficiency of the process was evaluated by measuring the photocatalytic degradation of Diuron (3-(3,4-dichlorophenyl)-1,1-dimethyl-urea)) under UV irradiation. Kinetic studies were carried out by investigating the influence of different parameters controlling the reaction (TiO2 loading and ??-SiC foam cell size). The ageing of TiO2/??-SiC foam photocatalytic materials and the mineralization (TOC, Cl?, NO3? and NH4+) of Diuron were investigated. 相似文献74.
Olvera-Vargas Hugo Leroy Sébastien Rivard Michael Oturan Nihal Oturan Mehmet Buisson Didier 《Environmental science and pollution research international》2016,23(22):22691-22700
Environmental Science and Pollution Research - Some widely prescribed drugs are sparsely metabolized and end up in the environment. They can thus be a focal point of ecotoxicity, either themselves... 相似文献
75.
Didier ORTELLI Patrick EDDER Joelle NANCOZ Claude CORVI 《环境化学》2007,26(3):413-414
如今水环境中有机污染物对环境的影响已经远远超过以往.农业中广泛使用的农药往往会造成残留而污染土壤和地表水.目前,大多数水源都受到农药的污染,却仍然用于生产饮用水. 相似文献
76.
Ibtihaj El Mamoun Fahr Mouna Abourouh Mohammed Bendaou Najib Triqui Zine‐El Abidine Guedira Abdelkarim Bogusz Didier Laplaze Laurent Smouni Abdelaziz 《补救:环境净化治理成本、技术与工艺杂志》2020,30(2):73-80
Heavy metal contamination is of particular concern for human health and the environment. Phytoremediation is an emerging cost‐effective strategy to remediate heavy metal contaminated soil. However, this technique is limited by the small number of plants that are tolerant to heavy metals and are also accumulators. This study assayed zinc, lead, and cadmium tolerance and accumulation in Cistus libanotis, Cistus albidus, and Cistus salviifolius. The plants were cultivated in hydroponic conditions and exposed to different concentrations of Pb(NO3)2 (100 and 200 µM), ZnSO4 (100 and 200 µM), or CdCl2 (10 and 20 µM) for 3 weeks. Plant biomass and metal accumulation in roots and aboveground parts varied greatly among the species. All three species appeared to be sensitive to Zn. However, C. albidus displayed strong tolerance to Pb and accumulated large quantities of Pb and Cd in its roots. C. libanotis accumulated large quantities of Pb and Cd in its aboveground parts. C. libanotis can thus be classified as a Pb and Cd accumulator species. The study results show that C. albidus is suitable for phytostabilization of Pb‐contaminated soils, while C. libanotis can be used for phytoextraction of both Pb and Cd. 相似文献
77.
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79.
Prisca Yvette Ayekoe Didier Robert Droh Lanciné Goné 《Environmental Chemistry Letters》2016,14(3):387-393
Photocatalytic oxidation using semiconductors is one of the advanced oxidation processes for degradation of organic pollutants in water and air. TiO2 is an excellent photocatalyst that can mineralize a large range of organic pollutants such as pesticides and dyes. The main challenge is to improve the efficiency of the TiO2 photocatalyst and to extend TiO2 light absorption spectra to the visible region. A potential solution is to couple TiO2 with a narrow band gap semiconductor possessing a higher conduction band such as bismuth oxide. Therefore, here we prepared Bi2O3/TiO2 heterojunctions by the impregnation method with different Bi/Ti ratio. The prepared composites have been characterized by UV–Vis diffused reflectance spectra and X-ray diffraction. The photocatalytic activity of the heterojunction has been determined from the degradation of orange II under visible and UV light. Results show that Bi2O3/TiO2 heterojunctions are more effective than pure TiO2-anatase under UV-A irradiation, with an optimum for the Bi/Ti ratio of 5 %, for the photocatalytic degradation of Orange II. However, the photocatalytic activity under irradiation at λ higher than 420 nm is not much improved. Under UV–visible radiation, the two semiconductors are activated. We propose a mechanism explaining why our products are more effective under UV–visible irradiation. In this case the charge separation is enhanced because a part of photogenerated electrons from the conduction band of TiO2 will go to the conduction band of bismuth oxide. In this composite, titanium dioxide is the main photocatalyst, while bismuth oxide acts as adsorbent photosensitizer under visible light. 相似文献
80.
Mohamed Cissé Didier Montet Gérard Loiseau Marie-Noëlle Ducamp-Collin 《Journal of Polymers and the Environment》2012,20(3):830-837
The individual and interactive effects of glycerol and chitosan concentrations on edible film properties were investigated using response surface methodology. The results of ANOVA indicated that all the independent variables exhibited significant effect on the film properties. Chitosan concentration had a positive effect on CO2 permeability and negative effect on O2 while the glycerol concentration had a positive effect on permeability to both gases. Regarding water vapor permeability, the chitosan concentration had a negative effect, whereas the glycerol had no influence. Moreover, both chitosan and glycerol concentration influenced the elongation at break point (%A), and only glycerol concentration had a significant effect on tensile strength. Optimization by desirability approach was carried out on the independent variables to get the optimum levels within the experimental conditions. It was found that 1.5 % of chitosan and 25 % of glycerol (wt/wt of chitosan) retarded respiration and showed a strong permeability to water vapor. 相似文献