Removing polycyclic aromatic hydrocarbons from water using granular activated carbon: kinetic and equilibrium adsorption studies

Environmental Science and Pollution Research International
Dinushika EeshwarasingheSaravanamuthu Vigneswaran

Abstract

Polycyclic aromatic hydrocarbons (PAHs) constitute a group of highly persistent, toxic and widespread environmental micropollutants that are increasingly found in water. A study was conducted in removing five PAHs, specifically naphthalene, acenaphthylene, acenaphthene, fluorene and phenanthrene, from water by adsorption onto granular activated carbon (GAC). The pseudo-first-order (PFO) model satisfactorily described the kinetics of adsorption of the PAHs. The Weber and Morris diffusion model's fit to the data showed that there were faster and slower rates of intra-particle diffusion probably into the mesopores and micropores of the GAC, respectively. These rates were negatively related to the molar volumes of the PAHs. Batch equilibrium adsorption data fitted well to the Langmuir, Freundlich and Dubinin-Radushkevich models, of which the Freundlich model exhibited the best fit. The adsorption affinities were related to the hydrophobicity of the PAHs as determined by the log Kow values. Free energies of adsorption calculated from the Dubinin-Radushkevich model and the satisfactory kinetic data fitting to the PFO model suggested physical adsorption of the PAHs. Adsorption of naphthalene, acenaphthylene and acenaphthene in fixed-b...Continue Reading

References

Oct 14, 2003·Environmental Toxicology and Chemistry·Randhir S Makkar, Karl J Rockne
Apr 15, 2004·The Science of the Total Environment·Z L ZhangG Yu
Apr 25, 2006·Environmental Toxicology and Chemistry·Kristine H Wammer, Catherine A Peters
Sep 11, 2007·Water Environment Research : a Research Publication of the Water Environment Federation·Eakalak KhanParitta Rotwiron
May 6, 2008·Journal of Hazardous Materials·Ahmed El NemrAzza Khaled
Jul 20, 2010·Journal of Hazardous Materials·Mingjiang YuanCharles Q Jia
May 1, 1999·Environmental Science & Technology·C M Cooney
Jun 1, 1985·Environmental Science & Technology·M M MillerD Mackay
Jan 29, 2016·Chemosphere·Shanti LamichhaneRanjan Sarukkalige
Apr 18, 2016·Environmental Pollution·Liang LiuYuntao Guan
May 19, 2016·The Science of the Total Environment·Mahatheva KalarubanSaravanamuthu Vigneswaran

❮ Previous
Next ❯

Citations

Sep 6, 2019·Environmental Science and Pollution Research International·Weixing LiuDafang Fu
Dec 16, 2019·Environmental Science and Pollution Research International·Lucas Mironuk FrescuraMarcelo Barcellos da Rosa
Dec 7, 2018·Environmental Science and Pollution Research International·Li LongYing Zhu
Sep 19, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Weihang OuyangJinkai Xue
Apr 29, 2021·Environmental Geochemistry and Health·Tatiana MinkinaCarla Sofia Santos Ferreira

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.