PMID: 12564916Feb 5, 2003Paper

Sorption hysteresis of benzene in charcoal particles

Environmental Science & Technology
Washington J BraidaBaoshan Xing

Abstract

Charcoal is found in water, soil, and sediment where it may act as a sorbent of organic pollutants. The sorption of organic compounds to natural solids often shows hysteresis. The purpose of this study was to determine the source of pronounced hysteresis that we found in the sorption of a hydrophobic compound (benzene) in water to a maple-wood charcoal prepared by oxygen-limited pyrolysis at 673 K. Gas adsorption (N2, Ar, CO2), 13C NMR, and FTIR show the charcoal to be a microporous solid composed primarily of elemental (aromatic) C and secondarily of carboxyl and phenolic C. Nonlocal density functional theory (N2, Ar) and Monte Carlo (CO2) calculations reveal a porosity of 0.15 cm3/g, specific surface area of 400 m2/g, and appreciable porosity in ultramicropores < 10 A. Benzene sorption-desorption conditions were chosen to eliminate artificial causes of hysteresis (rate-limiting diffusion, degradation, colloids effect). Charcoal sorbed up to its own weight of benzene at approximately 69% of benzene water solubility. Sorption was highly irreversible over most of the range tested (10(-4)-10(3) microg/mL). A dimensionless irreversibility index (/i) (0 < or = /i < or = 1) based on local slopes of adsorption and desorption branches...Continue Reading

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Citations

Oct 17, 2008·Environmental Science and Pollution Research International·Bo PanBaoshan Xing
Apr 24, 2013·Journal of Hazardous Materials·Kirk T SempleGary D Bending
Oct 27, 2011·Environmental Science & Technology·Marc TeixidóJordan Peccia
Nov 18, 2011·Environmental Science & Technology·Seyoum Yami GebremariamDavid R Yonge
Oct 20, 2012·Environmental Science & Technology·Charisma LattaoJoseph J Pignatello
Mar 8, 2012·Journal of Agricultural and Food Chemistry·Minori UchimiyaVeera M Boddu
Jul 17, 2012·Journal of Hazardous Materials·Sheridan M MartinEvelyn Krull
Nov 8, 2011·Journal of Contaminant Hydrology·Zoi MaggaChristos D Tsakiroglou
Jan 18, 2011·Journal of Contaminant Hydrology·Youbin SiDongmei Zhou
Oct 26, 2010·Journal of Hazardous Materials·Ling LuoYingxu Chen
Nov 17, 2009·Chemosphere·Xiang-Rong Xu, Xiao-Yan Li
Jul 29, 2009·Journal of Environmental Sciences (China)·Ruijuan LiXiaoquan Shan
Apr 4, 2009·Journal of Hazardous Materials·Changhong HongQuanxing Zhang
Mar 26, 2009·Pest Management Science·Amrith S GunasekaraRonald S Tjeerdema
Mar 23, 2011·Environmental Toxicology and Chemistry·Xin ShiDongqiang Zhu
Feb 8, 2011·Environmental Toxicology and Chemistry·Zhifeng YangJunfeng Niu
Sep 8, 2010·Environmental Toxicology and Chemistry·Jake W GinsbachFrank M Dunnivant
Jul 15, 2006·Journal of Hazardous Materials·Hui-Chen HuangJiunn-Chen Chen
Mar 13, 2016·Journal of Environmental Sciences (China)·Marta StaniszewskaJoanna Kiełczewska
Oct 18, 2005·Chemosphere·Albert A KoelmansOrjan Gustafsson
Dec 3, 2014·Journal of Hazardous Materials·Soyoung Kang, Hoon Young Jeong

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