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122.
Jawhid Omid Seyedi Neda Zohuri Gholam Hossein Ramezanian Navid 《Journal of Polymers and the Environment》2021,29(6):1860-1868
Journal of Polymers and the Environment - Cellulose was initially extracted from Safflower (Carthamus tinctorius L.) stem wastes and used for the preparation of a fully bio-based adsorbent polymer... 相似文献
123.
Emadi Alireza Sobhani Reza Ahmadi Hossein Boroomandnia Arezoo Zamanzad-Ghavidel Sarvin Azamathulla Hazi Mohammad 《Environment, Development and Sustainability》2022,24(4):4845-4871
Environment, Development and Sustainability - Water resource management in the agricultural sector is a necessity that profoundly impacts water resources conservation for future generations. With... 相似文献
124.
Hossein Mousazadeh Alireza Keyhani Hossein Mobli Ugo Bardi Ginevra Lombardi Toufic el Asmar 《Journal of Cleaner Production》2009,17(9):781-790
The RAMseS project, financed by the European Commission under the 6th framework Program, has the purpose of developing a solar powered agricultural vehicle in order to replace the conventional vehicles based on internal combustion engines (ICE). In the present study, we report a comparison of life-cycle emission between two systems; a conventional ICE vehicle (ICEV) and the RAMseS electrical vehicle (EV). The study has been conducted by designing a specific model and using the SimaPro software. The results show that the RAMseS system is considerably more environmentally friendly than conventional ICE based system and that, specifically, it can avoid the emission of about 23 ton of CO2equ per year. Regarding all other pollutants, we found that the RAMseS system is 2.6 times more efficient than the ICEV. The main contribution to emissions of the RAMseS system is due to the batteries which contribute for a 73% of the total. Therefore, further improvement can be obtained with the use of more advanced battery systems, not based on lead. 相似文献
125.
Hossein Ghiassian Gholamreza Poorebrahim Donald H Gray 《Waste management & research》2004,22(2):108-114
A root or fibre-reinforced soil behaves as a composite material in which fibres of relatively high tensile strength are embedded in a matrix of relatively plastic soil. Shear stresses in the soil mobilize tensile resistance in the fibres, which in turn impart greater strength to the soil. A research project has been undertaken to study the influence of synthetic fibrous materials for improving the strength characteristics of a fine sandy soil. One of the main objectives of the project is to explore the conversion of fibrous carpet waste into a value-added product for soil reinforcement. Drained triaxial tests were conducted on specimens, which were prepared in a cylindrical mould and compacted at their optimum water contents. The main test variables included the aspect ratio and the weight percentage of the fibrous strips. The results clearly show that fibrous inclusions derived from carpet wastes improve the shear strength of silty sands. A model developed to simulate the effect of the fibrous inclusions accurately predicts the influence of strip content, aspect ratio and confining pressure on the shear strength of reinforced sand. 相似文献
126.
Ravanipour Masoumeh Bagherzadeh Razieh Mahvi Amir Hossein 《Journal of Material Cycles and Waste Management》2021,23(4):1394-1403
Journal of Material Cycles and Waste Management - The aim of this study was to investigate the estimation and management of fish and shrimp wastes in Bushehr province. Two-part questionnaire... 相似文献
127.
Mohammad Javad Zare Sakhvidi Abdul Rahman Bahrami Alireza Ghiasvand Hossein Mahjub Ludovic Tuduri 《Environmental monitoring and assessment》2013,185(6):4933-4941
Exposure to perchlorethylene, especially for dry cleaning workers and for people living near dry cleaning shops, could lead to several diseases and disorders. This study examines the value of solid-phase microextraction (SPME) for sampling perchlorethylene in the atmosphere of dry cleaning shops. Carboxen/polydimethylsiloxane (CAR/PDMS) in 0.5-cm retracted mode was selected. There were no significant differences between sampling rates at different temperatures (range of 20 to 30 °C) and air velocities (2 to 50 cm/s). On the opposite, relative humidity (RH) had a significant effect on sampling rates. Method reproducibility was realized in the laboratory and field conditions and was 6.2 % and 7 to 11 %, respectively. Repeatability was also determined as 8.9 %. Comparison of the results according to the American Industrial Hygiene Association exposure assessment strategy showed the SPME sampler yields more conservative results in comparison with traditional standard method. 相似文献
128.
Effect of fertilizer application on soil heavy metal concentration 总被引:22,自引:0,他引:22
Zahra Atafar Alireza Mesdaghinia Jafar Nouri Mehdi Homaee Masoud Yunesian Mehdi Ahmadimoghaddam Amir Hossein Mahvi 《Environmental monitoring and assessment》2010,160(1-4):83-89
A large amount of chemicals is annually applied at the agricultural soils as fertilizers and pesticides. Such applications may result in the increase of heavy metals particularly Cd, Pb, and As. The objective of this study was to investigate the variability of chemical applications on Cd, Pb, and As concentrations of wheat-cultivated soils. Consequently, a study area was designed and was divided into four subareas (A, B, C, and D). The soil sampling was carried out in 40 points of cultivated durum wheat during the 2006–2007 periods. The samples were taken to the laboratory to measure their heavy metal concentration, soil texture, pH, electrical conductivity, cationic exchange capacity, organic matter, and carbonate contents. The result indicated that Cd, Pb, and As concentrations were increased in the cultivated soils due to fertilizer application. Although the statistical analysis indicates that these heavy metals increased significantly (P value < 0.05), the lead and arsenic concentrations were increased dramatically compared to Cd concentration. This can be related to overapplication of fertilizers as well as the pesticides that are used to replant plant pests, herbs, and rats. 相似文献
129.
Turbulent velocity profile in fully-developed open channel flows 总被引:2,自引:0,他引:2
Hossein Bonakdari Frédérique Larrarte Laurent Lassabatere Claude Joannis 《Environmental Fluid Mechanics》2008,8(1):1-17
The determination of velocity profile in turbulent narrow open channels is a difficult task due to the significant effects
of the anisotropic turbulence that involve the Prandtl’s second type of secondary flow occurring in the cross section. With
these currents the maximum velocity appears below the free surface that is called dip phenomenon. The well-known logarithmic
law describes the velocity distribution in the inner region of the turbulent boundary layer but it is not adapted to define
the velocity profile in the outer region of narrow channels. This paper relies on an analysis of the Navier–Stokes equations
and yields a new formulation of the vertical velocity profile in the center region of steady, fully developed turbulent flows
in open channels. This formulation is able to predict time averaged primary velocity in the outer region of the turbulent
boundary layer for both narrow and wide open channels. The proposed law is based on the knowledge of the aspect ratio and
involves a parameter CAr depending on the position of the maximum velocity (ξdip). ξdip may be derived, either from measurements or from an empirical equation given in this paper. A wide range of longitudinal
velocity profile data for narrow open channels has been used for validating the model. The agreement between the measured
and the computed velocities is rather good, despite the simplification used. 相似文献
130.