Author: Benjamin Arthur FretwellPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Distribution of Contaminants in the Seasonally Unsaturated Zone of the Chalk Aquifer
Author: Benjamin Arthur FretwellPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The Migration and Attenuation of Gasworks Contaminants in the Chalk Aquifer
Author: Jonathan Mark BurtonPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The first gasworks were developed in the early 19th Century and their usage increased until the 1970's when the manufacture of town gas was phased out owing to the new natural gas supply. Consequently, gasworks often have a long history of potentially contaminative use. The main process utilised on these sites, coal carbonization, produced a broad range of potential contaminants including phenols, benzene, toluene, ethylbenzene and xylene (BTEX), polycyclic aromatic hydrocarbons (P AH's), ammonium, and cyanides. This study has focused largely on ammonium and phenol migration and attenuation in the Chalk aquifer and overlying sediments, following the extensive characterisation of a former gasworks at St Albans, Hertfordshire, UK. Invasive and non-invasive techniques, including borehole construction, enabling core- retrieval, "--And geophysical investigation methods respectively, have been used to characterise the nature and extent of contamination and the possible migration pathways in the Chalk aquifer. Chalk pore-water quality analyses indicate that the aquifer is contaminated at depth, but attenuation of ammonium and phenol is sufficient to reduce .- 'concentrations to an acceptable level in the nearby Holywell Hill pumping station. Concentrations of ammonium, phenols and the BTEX compounds in fissure-derived water beneath the former gasworks are well above drinking water" standards, and long- term monitoring has shown that their distribution is closely related to fluctuations in water levels and changes in pumping regimes at the pumping station. Excavation and drilling work has highlighted the variability in the depth of the Chalk surface over the study area, and this has a significant influence on groundwater flow and contaminant -- distribution. Batch adsorption experiments on unsaturated and saturated zone sediments suggest that -phenol is only adsorbed by topsoil samples owing to the presence of specific fractions of organic matter. Ammonium adsorption was highest in unsaturated zone sediments and is closely related to surface area and cation exchange capacity. Leaching through cores suggests that the Chalk matrix has little potential for the attenuation of ammonium. Biodegradation appears to control the attenuation of phenol in the Chalk.
Bringing Groundwater Quality Research to the Watershed Scale
Author: Neil R. ThomsonPublisher:
ISBN: 9781901502183
Category : Nature
Languages : en
Pages : 566
Book Description
Tracers and Modelling in Hydrogeology
Author: Alain DassarguesPublisher: IAHS Press
ISBN: 9781901502213
Category : Groundwater flow
Languages : en
Pages : 588
Book Description
The Chalk Aquifers of Northern Europe
Author: R.P. FarrellPublisher: Geological Society of London
ISBN: 1786205513
Category : Science
Languages : en
Pages : 471
Book Description
The Cretaceous Chalk aquifers of Northern Europe underlie and support many sensitive ecosystems whilst at the same time being an important source of drinking water. Understanding, managing and protecting this valuable asset has always been a challenge and this volume brings together 25 papers representing current knowledge of the Chalk across a variety of thematic sections. The contributions look at aquifer properties, geology and karst; groundwater monitoring in the Chalk; groundwater management; groundwater-fed wetlands; engineering in the Chalk; heat and solute transport; diffuse pollution; and point source pollution. Geographically, the book includes studies undertaken in England, France, Belgium and Denmark. As well as academic papers, many of the chapters are practitioner focused and the editors hope that anyone working in Chalk groundwaters in Northern Europe, whether in academic, consultancy, water company or regulatory roles, will find this book an invaluable resource.
IAHS Publication
Author: Aquifer Contamination and Protection
Author: International Hydrological ProgrammePublisher:
ISBN:
Category : Science
Languages : en
Pages : 468
Book Description
Theoretical and practical aspects; case histories; appendix.
Distribution of Major Herbicides in Ground Water of the United States
Author: Poential [sic] for Ground-water Contamination from Movement of Wastewater Through the Unsaturated Zone, Upper Mojave River Basin, California
![Poential [sic] for Ground-water Contamination from Movement of Wastewater Through the Unsaturated Zone, Upper Mojave River Basin, California PDF](https://books.google.com/books/content/images/frontcover/Pv0kAQAAIAAJ?fife=w80-h100)
Author: Occurrence and Distribution of Selected Contaminants in Public Drinking-water Supplies in the Surficial Aquifer in Delaware
Author: Matthew J. FerrariPublisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 62
Book Description