نتایج جستجو برای: bio sorbent

تعداد نتایج: 63826  

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1391

مقدمه وهدف : میزان موفقیت مواد بکار رفته در جراحی های بالا بردن کف سینوس ماگزیلا و همچنین ثبات ایمپلنت های قرار گرفته در این نواحی همواره مطرح است لذا این مطالعه با هدف مقایسه ارتفاع استخوان و میزان ثبات ایمپلنت های کاشته شده به طور همزمان با جراحی بالا بردن کف سینوس ماگزیلا با استفاده از مواد bio-oss و nanobone با استفاده از آنالیز فرکانس انعکاسی و تصاویر cbct بود. مواد و روشها : در ابتدا بیم...

Journal: :Marine pollution bulletin 2005
T R Annunciado T H D Sydenstricker S C Amico

Oil spills are a global concern due to their environmental and economical impact. Various commercial systems have been developed to control these spills, including the use of fibers as sorbents. This research investigates the use of various vegetable fibers, namely mixed leaves residues, mixed sawdust, sisal (Agave sisalana), coir fiber (Cocos nucifera), sponge-gourd (Luffa cylindrica) and silk...

Journal: :Marine pollution bulletin 2016
Rosalam Sarbatly Duduku Krishnaiah Zykamilia Kamin

The growths of oil and gas exploration and production activities have increased environmental problems, such as oil spillage and the resulting pollution. The study of the methods for cleaning up oil spills is a critical issue to protect the environment. Various techniques are available to contain oil spills, but they are typically time consuming, energy inefficient and create secondary pollutio...

Abdossamad Rastegar, Bagher Anvaripour, Nematollah Jaafarzadeh

In the present study, lightweight expanded clay aggregate (LECA) coated with iron oxide was investigated as a low cost sorbent to remove  from wastewater. Iron oxide coated LECA (IOCL) as a new sorbent was tested for its efficiency as  sorbent using operational parameters such as contact time, the initial pH of the solutions, and sorbent dosage concentration in batch systems. The adsorption cha...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
babak salamatinia abdullah ahmad zuhairi iman hashemizadeh

the no removal over oxide sorbents (k2o/al2o3 , cao/al2o3 and bao/al2o3) at a loading of up to 25 wt.% was investigated using a synthetic diesel exhaust gas containing  1,000 ppm no, 1000 ppm iso-butane (i-c4h10), 8% o2 and n2 balance. the reactor was operated  at 250 oc to 450 oc for the activity study. no was effectively stored (removal efficiencies between 30-60 %) as nitrate under experimen...

2008

Mercury is one of the most toxic heavy metals present in aquatic systems, exhibiting a complex behaviour in the environment, where it may persist for decades after the source of pollution is stopped. Hence, it is important develop new techniques for its removal from the aquatic systems. In this context, a particularly promising line of research is the use of new materials capable of up taking m...

2010
Mark T. Peters

moles Np per kg of solution in contact with sorbent). The samples labeled GW are from sorption tests performed in simulated groundwater; all other tests were done in ~0.001 molal sodium chloride solutions—(g) denotes goethite sorbent, (mag) denotes magnetite sorbent. Uptake of Technetium (Tc) by Iron-Based Materials Kenneth M. Krupka, Christopher F. Brown, Steve M. Heald, H. Todd Schaef, Bruce ...

Journal: :Journal of Cleaner Production 2021

Looking for new green and environmentally friendly bio sorbents metal removal from polluted wastewater, the present study investigates potential sorbent Cd(II) wastewater namely, mechanism uptake capacity of by brown algae, Fucus vesiculosus Irish Sea. This work takes a comprehensive approach involving combination qualitative quantitative information collected macro to atomistic scale, in direc...

1996
P. Knabner K. U. Totsche I. Kögel-Knabner

Modeling carrier influenced transport needs to take into account the reactivity of the carrier itself. This paper presents a mathematical model of reactive solute transport with sorption to mobile and immobile sorbents. The mobile sorbent is considered to be reactive, too. To justify the assumptions and generality of our modelling approach, experimental findings are reviewed and analyzed. A tra...

2016
Areum Lim Myung-Hee Song Chul-Woong Cho Mohamed Khayet

The purpose of this study was to design a powerful fibrous sorbent for recovering precious metals such as Pd(II) and Pt(IV), and moreover for identifying its selectivity toward Pd(II) or Pt(IV) from a binary metal solution. For the development of the sorbent, polyacrylonitrile (PAN) was selected as a model textile because its morphological property (i.e., thin fiber form) is suitable for fast a...

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