نتایج جستجو برای: removal rate

تعداد نتایج: 1083422  

2005
Charles Kwit Douglas J. Levey Scott F. Pearson Sarah Sargent

We tested the hypothesis that winter removal rates of h i t s of wax myrtle, ~Vfjricu cerifern, are higher in colder winters. Over a 9-year period, we monitored M. cerifkru fruit crops in 13 0.1-ha study plots in South Carolina, U.S.A. Peak ripeness occurred in November, whereas peak removal occurred in the coldest months, December and January. Mean time to fruit removal within study plots was ...

Journal: :Applied and environmental microbiology 1984
L K McConnell R C Sims B B Barnett

Laboratory column studies were conducted at the Utah Water Research Laboratory, Logan, Utah, to evaluate reovirus removal from drinking water supplies by slow-rate sand filtration (SSF). Columns, constructed to simulate a full-scale SSF field operation, were inoculated with reovirus at ca. 1,000-times-greater concentrations than those typically found in domestic sewage. Reovirus removal and ina...

Journal: :Journal of environmental quality 2012
D Muth K M Bryden

Agricultural residues have near-term potential as a feedstock for bioenergy production, but their removal must be managed carefully to maintain soil health and productivity. Recent studies have shown that subfield scale variability in soil properties (e.g., slope, texture, and organic matter content) that affect grain yield significantly affect the amount of residue that can be sustainably remo...

Journal: :health scope 0
hossein kamani health promotion research center, zahedan university of medical sciences, zahedan, ir iran edris bazrafshan health promotion research center, zahedan university of medical sciences, zahedan, ir iran mohammad ghanbari ghozikali environmental health department of east azerbaijan province, health center, tabriz university of medical sciences, tabriz, ir iran majid askari department of material science and engineering, sharif university of technology, tehran, ir iran reza ameri department of environmental engineering, science and research branch, islamic azad university, tehran, ir iran; department of environmental engineering, science and research branch, islamic azad university, tehran, ir iran. tel: +98-2188968258, fax: +98-2166462267

conclusions the uv/zno system has been found an effective process with 90.2% cod removal and 95.6% dye removal after 50 minutes treatment. materials and methods in this work, zno catalyst and mercury lamp (uv-c, 254 nm) have been applied for removal of the c.i. sulphur red 14 dye from aqueous environments. the influence of various parameters such as the amount of zno, initial dye concentration,...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2015
hongbo xu dan-dan liu lu he na liu guiling ning

the poly(ethyleneimine)-functionalized silica has been developed successfully as an effective adsorbent for the adsorption removal of cu(ii) ions from electroplating wastewater. the influences of ph, contact time and initial concentration of cu(ii) ions on the adsorption capacity and the effect of adsorbent dosage on the removal efficiency of cu(ii) ions from electroplating wastewater were inve...

Introduction: Nitrophenol compounds are toxic compounds found in industrial wastewaters. 2,4-dinitrophenol is the most dangerous compound among phenolic compounds. The aim of this study was to evaluate the removal of 2,4-DNP from wastewater by microwaved dried sludge adsorbent. Materials and Methods: The results of 2,4-DNP removal were discontinuously obtained by the high performance liquid ch...

Journal: :journal of health sciences and surveillance system 0
narges shamsedini department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, iran; mohammad ali baghapour department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, iran; mansooreh dehghani research center for health sciences, department of environmental health, school of health, shiraz university of medical sciences, shiraz, iran; simin nasseri

background: atrazine is one of the most widely used triazine herbicides which has been used for controlling broadleaf and grassy weeds for many years. its widespread use in water has caused environmental concern because of frequent detection of atrazine in aquatic systems where this herbicide has been spilled. therefore, the purpose of this study was to determine the herbicide removal efficienc...

Journal: :تحقیقات نظام سلامت 0
عباس خدابخشی دانشجوی دکتری، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان و استادیار، گروه بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی شهرکرد، شهرکرد، ایران. محمد مهدی امین دانشیار، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. مرتضی مظفری استادیار، گروه فیزیک، دانشگاه رازی، طاق بستان، کرمانشاه، ایران. بیژن بینا استاد، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران.

background: removing heavy metals from industrial wastewaters by iron nanoparticles has been much noticed in the recent years. chromium is considered as one of the emphasis environmental pollutants. there are high concentrations of chromium in the wastewater of electroplating industries. magnetic iron nanoparticles are used to control and eliminate the heavy metals from industrial effluents thr...

2009
Pai-Shan Pa

This study presents a new nanotechnology application involving an ITO thin-film removal reuse process using an eccentric-form negative electrode, offering a fast removal rate from the surface of liquid crystal displays (LCDs). For the precision removal process, a small amount of eccentricity of the negative electrode or a higher rotational speed of the negative electrode corresponds to a higher...

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