Author: Vahid ArastehPublisher:
ISBN:
Category :
Languages : en
Pages : 72
Book Description
Mathematical Modeling of the Surfactant-enhanced Dissolution and Biodegradation of Polycyclic Aromatic Hydrocarbons from Non-aqueous Phase Liquids
Author: Vahid ArastehSurfactant Effects on Solubilization, Dissolution and Biodegradation of Polycyclic Aromatic Hydrocarbons from Non-aqueous Phase Liquids
Author: Leticia Alonso BernardezPublisher:
ISBN:
Category :
Languages : en
Pages : 410
Book Description
"The objective of the thesis was to investigate the effects of nonionic surfactants on the dissolution and biodegradation of polycyclic aromatics hydrocarbons (PAHs) from a multicomponent non-aqueous phase liquids (NAPLs)." --
The Role of Colloidal Systems in Environmental Protection
Author: Monzer FanunPublisher: Elsevier
ISBN: 0444632840
Category : Science
Languages : en
Pages : 715
Book Description
The Role of Colloidal Systems in Environmental Protection describes the importance of colloids in many applications that contribute to environmental protection, including drinking water and wastewater treatment, heavy metal remediation, treatment of radioactive materials, corrosion, and energy conversion. Knowledge of the physical and chemical composition of colloids is important to understand and accurately model the relevant processes. The book familiarizes the reader with the technological features of the application of colloids in environmental protection, and provides chemical engineers, researchers, and scientists in academic and corporate communities with the latest developments in this field. Each chapter covers the whole spectrum of the relevant science, from the fundamentals to applications. - Provides the applied technological features of colloids in environmental protection - Gives insight into the use of bio-solid colloids as contaminant carriers - Covers the natural occurrence of biosurfactants in the environment and their applications - Provides information on the use of nanoparticles for environmental applications - Chapters written by recognized and respected experts in the field from all over the world
Proceedings of the Estonian Academy of Sciences, Biology and Ecology
Author: Surfactant Solubilization of Polycyclic Aromatic Hydrocarbons from Nonaqueous Phase Liquids
Author: Assessment of the Use of Surfactants for Biodegradation of Hydrophobic Pollutants
Author: Stefan J. GrimbergPublisher:
ISBN:
Category : Phenanthrene
Languages : en
Pages : 78
Book Description
Surfactant-Enhanced In Situ Biodegradation of Strongly Sorbing Organic Substances in Soil Environments
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 62
Book Description
Low-solubility Polycyclic Aromatic Hydrocarbons such as phenanthrene are easily biodegradable but due to sorption onto soil or/or their presence in a non-aqueous phase, their bioavailability is greatly reduced. In an aqueous environment where surfactants exist above their critical micelle concentration hydrophobic contaminant will partitioning into the hydrophobic core of the micelle. This enhances the apparent solubility of these hydrocarbons and therefore also their desorption from soils. Conceivably, in the absence of any inhibitory effects, such surfactants may enhance the biodegradation of the hydrocarbon. Through a set of screening experiments a group of non-ionic surfactants were identified which do not inhibit the bacterial degradation of the phenanthrene. A mathematical model was formulated to describe the interaction of the biomass-contaminant-water-surfactant system. The model assumes that the surfactant affects the solubility of phenanthrene and does not affect the biochemical characteristics of the biomass. An effective bioavailable concentration was defined. The model predicts experimental data well indicating that a part of the phenanthrene in the micelle phase can be degraded simultaneously with the phenanthrene in the aqueous phase. (jg) p.2.
Bacterial Biodegradation of Polycyclic Aromatic Hydrocarbons (PAH) and Potential Effects of Surfactants on PAH Bioavailability
Author: Proceedings of the Estonian Academy of Sciences
Author: Mass Transfer and Biodegradation of Polycyclic Aromatic Hydrocarbons from Non-aqueous Phase Liquids
Author: Mohammed AlshafiePublisher:
ISBN:
Category :
Languages : en
Pages : 218
Book Description
"Viscous interfacial films develop at the creosote-water interface when creosote is aged in water for a period of time. The mass transfer rate coefficient of naphthalene from creosote to water was reduced by 30% over a one-week aging period. Minor additional reductions were observed with further aging. Hindered diffusion through the bulk creosote phase and changes in composition of creosote as a result of extended dissolution did not account for the observed reductions." --