نتایج جستجو برای: natural sorbents

تعداد نتایج: 483329  

2011
Naved Siddiqui

This paper presents results that illustrate the recycling of a bamboo derived sorbent used for the capture of elemental mercury (Hg). The bamboo derived sorbent used is essentially a HCl functionalized activated carbon prepared from carbonization and CO2 activation of raw bamboo, that could potentially provide an alternative way to existing methods in removing mercury from flue gases from coal-...

1997
O. Fiehn

Untreated and biologically cleaned industrial wastewaters contain huge amounts of both hydrophilic and hydrophobic compounds. Due to breakthrough effects, only a few percent of the dissolved organic carbon is usually extracted by solid-phase extraction methods. Methods for screening analysis have not faced that problem sufficiently yet. To extract more hydrophilic compounds, solid-phase sorbent...

Journal: : 2022

Purpose: Modification of natural sorbents to improve their sorption properties. Design: Microwave treatment effect on the properties peat, reindeer moss, moss and pine sawdust. Research findings: Short-term microwave has no moisture oil absorption by peat moss. On contrary, sawdust are improved, especially wood waste, i. e., capacity increases 41 %. The provides 11.4 17 % increase in relation p...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت معلم تهران - دانشکده علوم 1370

determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...

Journal: :Environmental pollution 2007
Dibyendu Sarkar Konstantinos C Makris Vandana Vandanapu Rupali Datta

Use of Fe/Al hydroxide-containing materials to remediate As-contaminated sites is based on the general notion that As adsorption in soils is primarily controlled by Fe/Al (hydr)oxides. A low-cost and potentially effective substitute for natural Fe/Al hydroxides could be the drinking-water treatment residuals (WTRs). Earlier work in our laboratory has shown that WTRs are effective sorbents for A...

2014
Chih-Chau Hwang Josiah J. Tour Carter Kittrell Laura Espinal Lawrence B. Alemany James M. Tour

Natural gas is considered the cleanest and recently the most abundant fossil fuel source, yet when it is extracted from wells, it often contains 10-20 mol% carbon dioxide (20-40 wt%), which is generally vented to the atmosphere. Efforts are underway to contain this carbon dioxide at the well-head using inexpensive and non-corrosive methods. Here we report nucleophilic porous carbons are synthes...

Journal: :The Analyst 2012
Serena Ambrosini Sudhirkumar Shinde Ersilia De Lorenzi Borje Sellergren

Two molecularly imprinted polymers (MIPs) that we recently described to be class-selective for glucuronides have been successfully exploited for the molecularly imprinted solid-phase extraction (MISPE) of testosterone glucuronide (TG) from its parent drug (T) in urine. Both sorbents targeted the glucuronate fragment but feature different functional groups for binding the carboxylate anion, MIP1...

Journal: :Journal of analytical toxicology 2001
T Stimpfl J Jurenitsch W Vycudilik

The identification of general unknown poisons in complex biological materials like postmortem blood and tissue is a great challenge for the forensic toxicologist. Therefore, a screening procedure utilizing a semi-automatic work-up with an ASPEC system was developed. A broad range of different compounds can be isolated by using non-selective and generally applicable organic polymeric sorbents su...

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