Solid phase microextraction (SPME) coupled with gas chromatography was employed to estimate bioavailability of pyrene in soils with different properties of textures, organic matter contents (SOM) and aging periods. Experimental results indicated that biodegradation rates increased from 0.10 (sandy loam) to 0.15 (silty loam) microg g-1 hr1. By contrast, biodegradation rate decreased from 0.10(1....

Biodegradation by white rot fungi Abstract Pentachlorophenol (PCP) is a major organic compound used in the wood preservation. White rot fungal strains screened from local sources such as wood trunks and twigs of higher plants. Five selected isolates of White Rot Fungi (WRF) Viz: Laetiporus cincinnatus, Trametes versicolor, Fomes fomentarius, Ganoderma aplanutum and Pleurotus ostreatus isolated ...

We determined how a cleaner and a dispersant affected hydrocarbon biodegradation in wetland soils dominated by the plant Panicum hemitomon, which occurs throughout North and South America. Microcosms received no hydrocarbons, South Louisiana crude, or diesel; and no additive, a dispersant, or a cleaner. We determined the concentration of four total petroleum hydrocarbon (TPH) measures and 43 ta...

Widely used anthropogenic chelating agents EDTA and NTA are ubiquitous in wastewaters and natural waters. Chelating agents may enhance the mobility of heavy metals and radionuclides or increase eutrophication. Biodegradation of these chelates may reduce metal mobility, offering a remediation solution. Formation of metabolic intermediates was previously reported during the biodegradation of EDTA...

background: this study focused on isolation and identification of a phenanthrene (phe) degrader bacterium and optimization of environmental conditions for phe degradation. materials and methods: enrichment technique was used for isolation and the most effective isolate, named ap, selected based on its phe biodegradation abilities. the isolate was identified using morphological and biochemical t...

The structure of the hydrophobe in alcohol ethoxylates (AE) and alkylphenol ethoxylates (APE) has a significant influence on the biodegradation pathways and biodegradation rates of these nonionic surfactants in bacterial inocula present in waste treatment plants. APE undergo initial microbial attack at the terminal part of the polyoxyethylene (POE) chain followed by a shortening of the POE chai...

Although oil-based drilling fluids are of paramount practical and economical interest, they represent a serious source of pollution, once released into the environment as drill cuttings. The aim of this study is to assess the capability of isolated microorganisms to degrade gasoil fuel. The commonly used physicochemical and biodegradation remediation techniques of petroleum contaminated soil we...

Crude oil was treated with purified emulsan, the heteropolysaccharide bioemulsifier produced by Acinetobacter calcoaceticus RAG-1. A mixed bacterial population as well as nine different pure cultures isolated from various sources was tested for biodegradation of emulsan-treated and untreated crude oil. Biodegradation was measured both quantitatively and qualitatively. Recovery of CO(2) from min...

Naphthalene biodegradation was studied using the bacterial strain Pseudomonas putida S2. Three medium variables out of seven medium components were selected under Plakett-Burman (PB) design as having significant response on naphthalene biodegradation. These variables were citric acid (additional carbon sources), ammonium sulfate and sodium chloride. The levels of these three variables were opti...

7 Additional bibliography 10 Testing the biodegradation behaviour of the materials using standard laboratory tests, including test development, circular testing Assessment of biodegradability of the materials and products under real-life conditions 28 Assessment of the (eco-)toxic effects of the materials or degradation products using standard laboratory tests 47 Studying the effect of various ...