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81.
Green sea turtles (Chelonia mydas) are renowned for their long-distance migrations but have less fame for short-distance migrations or non-migratory behavior. We present satellite telemetric evidence from Cocos (Keeling) Islands, Indian Ocean for the first predominantly non-migratory green sea turtle (C. mydas) population. The mean migration distance from the nesting beach to the foraging grounds was 35.5 km with a maximum mean transit time of 3.4 days. The behavior of this population has major implications for our general understanding of green turtle behavior and their life cycle and for conservation. Firstly, these results indicate a level of juvenile or adult non-breeding homing behavior from the open ocean to foraging grounds adjacent to their natal nesting beach. Secondly, a non-migratory breeding phase reduces the consumption of reproductive energy utilized, potentially resulting in higher fecundity for this population. Thirdly, the close proximity of the nesting and foraging habitats allows for uniformity in management and conservation strategies rarely possible for wide-ranging green turtle populations. 相似文献
82.
83.
Muhammad Umar Hamidi Abdul Aziz Mohd. Suffian Yusoff 《Waste management (New York, N.Y.)》2010,30(11):2113-2121
Advanced oxidation processes (AOPs) such as Fenton, electro-Fenton and photo-Fenton have been applied effectively to remove refractory organics from landfill leachate. The Fenton reaction is based on the addition of hydrogen peroxide to the wastewater or leachate in the presence of ferrous salt as a catalyst. The use of this technique has proved to be one of the best compromises for landfill leachate treatment because of its environmental and economical advantages. Fenton process has been used successfully to mineralize wide range of organic constituents present in landfill leachate particularly those recalcitrant to biological degradation. The present study reviews the use of Fenton and related processes in terms of their increased application to landfill leachate. The effects of various operating parameters and their optimum ranges for maximum COD and color removal are reviewed with the conclusion that the Fenton and related processes are effective and competitive with other technologies for degradation of both raw and pre-treated landfill leachate. 相似文献
84.
The purpose of this study is to know the concentrations of some heavy-metal elements (Zn, Pb and Cd) in different types of soil and the effect of pH values on their solubility. Two types of soil were selected from area adjacent to the sewage treatment plant, as well as from an agricultural area in the city of Al-Rass, Qassim, KSA for this purpose. The results showed high concentrations of elements in the acidic medium at pH 2, while concentrations decreased as the pH increased to reach the neutral medium. The decrease in concentrations was very clear in the alkaline medium and reached the lowest values at pH10. On the other hand, the highest concentrations were detected in soil adjacent to the sewage treatment specially for Pb and Cd in comparison with agricultural soil. The previous results show the urgent need for wastewater treatment and checking for pH values at standard limits before use in irrigation or discharge it on soil surface, as well as soil analysis prior to the planting and selection of appropriate plants by specialists for the health of citizens, where each plant characterise by its absorption for specific elements. 相似文献
85.
Continuous adsorptive removal of glimepiride using multi-walled carbon nanotubes in fixed-bed column
Badran Ismail Qut Obada Manasrah Abdallah D. Abualhasan Murad 《Environmental science and pollution research international》2021,28(12):14694-14706
Environmental Science and Pollution Research - Water pollution by emerging pollutants such as pharmaceutical and personal care products is one of today’s biggest challenges. The presence of... 相似文献
86.
Ferhat Karaca Ismail Anil Omar Alagha 《Atmospheric environment (Oxford, England : 1994)》2009,43(36):5713-5722
This paper evaluates possible long-range source contributions to the PM10 profile of Istanbul, Turkey. A novel method for classifying PM10 episodic events resulting from long-range transport, as opposed to local ones, was implemented. Hourly PM10 mass concentrations from ten stations distributed throughout Istanbul during the year 2008 were used for this purpose. Hourly backward trajectories for the arrival of air masses to the center of Istanbul for the year 2008 were calculated using the HYSPLIT (Hybrid Single-Particle Lagrangian Integrated Trajectory) model. Significant episodes from these backward trajectories were selected and employed in Potential Source Contribution Function (PSCF) analysis to estimate the possible contribution of long-range PM10 transport (LRPMT) to observed PM10 concentrations. The PSCF results showed significant seasonal variations. Based on the results obtained, PM10 concentrations observed in Istanbul during summer and autumn are not heavily affected by LRPMT. Mediterranean countries, especially those of the central part of northern Africa (northern Algeria and Libya) are the most significant potential PM10 contributors to Istanbul's atmosphere during springtime. During winter, Balkan countries, including the Aegean part of Turkey, Greece, Bulgaria, Serbia, and Croatia, as well as northern Italy, eastern France, southern Germany, Austria and the eastern part of Russia, were the most important LRPMT source regions for high PSCF values. 相似文献
87.
Alwi Azham Zulkifli Nurin Wahidah Sukiman Nazatul Liana Yusoff Ashraf Zakaria Zulfattah Jamshaid Muhammad Hasnul Muhammad Harith Amzar Muhammad Syahir 《Environmental science and pollution research international》2019,26(12):11815-11826
Environmental Science and Pollution Research - The availability of natural energy resources and the environmental issues are the most significant issues that are often highlighted by the world... 相似文献
88.
Advanced physico-chemical treatment experiences on young municipal landfill leachates 总被引:19,自引:0,他引:19
Ozturk I Altinbas M Koyuncu I Arikan O Gomec-Yangin C 《Waste management (New York, N.Y.)》2003,23(5):441-446
In this study, Membrane Filtration (UF+RO), Struvite (MAP) precipitation and ammonia stripping alternatives were studied on biologically pre-treated Landfill Leachate. The results indicated that the system including the Upflow Anaerobic Sludge Blanket Reactor (UASBR) and Membrane Reactors (UF+RO) has been offered as an appropriate treatment alternative for young landfill leachates. This system provided high removals of COD, colour and conductivity (>98-99%). For ammonia removal, struvite precipitation was applied at the stoichiometric ratio (Mg:NH4:PO4=1:1:1) to anaerobically pre-treated raw landfill leachate effluent having an influent ammonium concentration of 2240 mg/l. Maximum ammonium nitrogen removal was observed as 85% at pH of 9.2. In ammonia stripping following 2 h of aeration, the removal was 72% at pH=12 while the removals were around 20% at pH=10 and pH=11. When membrane reactor, and struvite precipitation or ammonia stripping was applied to anaerobically pre-treated effluents, the results indicated that each system could be used as an appropriate post-treatment option for young landfill leachates. In economic aspect, ammonia stripping was found as the cheapest alternative with high ammonium removal. However, when both high COD and ammonium removals were to be achieved membrane technology such as UF+RO (SW) could be considered as the most appropriate system due to the fact that COD removal could be obtained very low by ammonia stripping. 相似文献
89.
Ali Nadeem Eqani Syed Ali Musstjab Akber Shah Nazar Ehtisham Alhakamy Nabil A. Rashid Muhammad Imtiaz Shahzad Khurram Zeb Jahan Shen Heqing Ismail Iqbal Mohammad Ibrahim Albar Hussain Mohammed Salem Ali 《Environmental science and pollution research international》2021,28(11):13288-13299
Environmental Science and Pollution Research - In the present study, occurrence of arsenic (As) and lead (Pb) is reported in rural and urban household dust (floor and AC filter dust) of the Kingdom... 相似文献
90.
Chlorine is extensively used to disinfect the drinking water supply. However, the inefficient use of chlorine as a disinfectant can result in the formation of chemical compounds which can have adverse health effects. Numerical models are increasingly being used in the design of efficient chlorine contact tanks. In this paper, details are given of the application of a two-dimensional semi-time-centred implicit QUICK scheme to model the transport of a tracer in a scaled physical model of a serpentine chlorine contact disinfection tank. The model is shown to give good agreement with laboratory measurements in the compartments of the tank where the flow is relatively uniform over the depth. 相似文献