Journal
ECOLOGICAL ENGINEERING
Volume 90, Issue -, Pages 225-233Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecoleng.2016.01.039
Keywords
pi-pi interaction; Hydrophobic interaction; Reed biochars; Pentachlorophenol; adsorption; Dissolved organic carbon
Funding
- major science and technology program for water pollution control and management [2013ZX07202-007]
Ask authors/readers for more resources
This study aims to investigate the impacts of pH, inorganic fractions and dissolved organic carbon (DOC) on pentachlorophenol (PCP) adsorption on reed biochars prepared by pyrolysis temperatures ranging from 300 degrees C to 600 degrees C, as well as illustrating the adsorption mechanisms. The adsorption capacities for PCP on acid-washed reed biochars were higher than that of original reed biochars. The dedication of neutral PCP molecules (PCP) and ionized PCP species (PCP-) to the overall adsorption at pH 3.0-12.0 was calculated. The relative contribution of PCP was above 53.4% at pH 3.0-5.0, and PCP- was dominant for adsorption at pH 6.0-12.0 with the contributions of 43.2%-100%. The inorganic fractions in the biochars present the negligible or negative effect on PCP adsorption due to its high hydrophilic. The water extractable DOC decreased the adsorption capacity of PCP on reed biochars. The isotherms of PCP adsorption on reed biochars were well described by Freundlich model, and the adsorption mechanisms were mainly interpreted as pi-pi and hydrophobic interactions. These observations are helpful for exploiting reed biochars as engineered absorbents to remove PCP from aqueous solution. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available