Imperial College London

DrBillDudeney

Faculty of Natural SciencesCentre for Environmental Policy

Visiting Reader
 
 
 
//

Contact

 

+44 (0)20 7594 2444a.dudeney

 
 
//

Location

 

Room 1.04Hamilton BuildingSilwood Park

//

Summary

 

Publications

Publication Type
Year
to

42 results found

Barrott JJ, Dudeney AWL, Mason PJ, 2014, Spatial and temporal relationships between Eocene sand horizons and iron contamination in stream water in the Thames Basin west of London, UK, Geochemistry-Exploration Environment Analysis, Vol: 14, Pages: 33-44, ISSN: 1467-7873

Analyses of stream water samples associated with Tertiary (Eocene) sands of the Bracklesham Formation 30–60 km west of London showed numerous occurrences of groundwater containing elevated iron(II) concentrations (1–15 mg/l Fe), which oxidise to red-brown ferrihydrite in localised wetlands and streams and join onward flows towards the River Thames. GIS mapping of iron concentrations in relation to topographical and geological data within a 20×30 km project area indicated some 168 km of iron-contaminated water.The results are consistent with downward permeation of groundwater through contained Camberley, Windlesham and Bagshot sand horizons and predominant W-E groundwater flow of up to 35 km in the Bagshot horizon, which rests on impermeable London Clay. Glauconite, comprising up to 70% of the sand near the base of the Windlesham horizon, apparently provides the main source of soluble iron in the near-anoxic, near-neutral, conditions normally prevailing. Pyrite is also a possible source, especially where quarrying or other excavation releases water from previously isolated volumes, simultaneously causing elevated sulphate and acidity levels via relatively rapid sulphide oxidation. Mechanisms proposed are underpinned through comparison with reports on analogous systems in the UK and abroad.Streams and lakes in the vicinity of seepages are highly visible and of decreased biodiversity. However, because of their natural origin, they are not subject to the same public concern and environmental control as compositionally similar near-neutral water from many former coal mines elsewhere - where iron derives primarily from pyrite. Also, while comparatively persistent, they appear destined for rapid depletion in geological terms: the unusual isolation of the sands until the Quaternary indicates a short leaching period and suggests a reason why iron-rich water from natural ferruginous sands is seldom of sufficient significanc

Journal article

Bouzalakos S, Dudeney AWL, Chan BKC, 2013, Formulating and optimising the compressive strength of controlled low-strength materials containing mine tailings by mixture design and response surface methods, MINERALS ENGINEERING, Vol: 53, Pages: 48-56, ISSN: 0892-6875

Journal article

Dudeney AWL, Chan BKC, Bouzalakos S, Huisman JLet al., 2013, Management of waste and wastewater from mineral industry processes, especially leaching of sulphide resources: state of the art, INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT, Vol: 27, Pages: 2-37, ISSN: 1748-0930

Journal article

Chan BKC, Bouzalakos S, Dudeney AWL, 2009, Cemented products containing waste from mineral processing and bioleaching, MINERALS ENGINEERING, Vol: 22, Pages: 1326-1333, ISSN: 0892-6875

Journal article

Chan BKC, Bouzalakos S, Dudeney AWL, 2008, Integrated waste and water management in mining and metallurgical industries, 24th International Mineral Processing Congress (IMPC), Publisher: ELSEVIER, Pages: 1497-1505, ISSN: 1003-6326

Conference paper

Bouzalakos S, Dudeney AWL, Cheeseman CR, 2007, Controlled low-strength materials containing waste precipitates from mineral processing, Minerals Engineering

Journal article

Chan BKC, Dudeney AWL, 2007, Stabilised mineral–biomass mixtures in groundwork: pilot study, Proceedings of the Institution of Civil Engineers - Waste and Resource Management, Vol: 160, Pages: 77-84, ISSN: 1747-6526

<jats:p> Based on fundamental characteristics previously determined, two types of pilot studies were carried out to inform possible future full-scale field application of stabilised mineral—biomass mixtures as components of brownfield restoration projects. To gain a preliminary confirmation of properties, four vertical cylinders containing mixed compacted material were used to represent cylindrical volumes within supposedly continuous mixed emplacements. A 100 t field emplacement based on an alkaline model was constructed within a clay lining. This was regulated by an Environment Agency waste management licence. During 18 months' monitoring, optical surveys detected no significant mechanical movement and the emplacement remained essentially dry despite periods of heavy rain and flooding. No landfill gas was detected in boreholes within the compact mass. Pore water recovered during final excavation contained low but significant levels of ammonia and heavy metals, thus justifying lining. The results should form the basis of development to a full-scale prototype emplacement (∼10 5 t, 1 ha) as a means of assessing this technology for reusing bulk surplus industrial products under regulation. </jats:p>

Journal article

Tyrologou P, Dudeney AWL, Harrison JP, Grattoni CAet al., 2007, Stabilised mineral–biomass mixtures in groundwork: fundamentals, Proceedings of the Institution of Civil Engineers - Waste and Resource Management, Vol: 160, Pages: 71-76, ISSN: 1747-6526

<jats:p> This paper considers the fundamentals of mechanical structures and fluid flow characteristics in lime-stabilised mineral—biomass mixtures for potential novel applications in low-value bulk industrial products or wastes. As contained organic matter is expected to be essentially stable indefinitely under anaerobic conditions, the composites represent a form of solid carbon sequestration. Laboratory specimens containing designed combinations of coarse mineral (4 or 10 mm quartz) and fines (wet digested sewage sludge, pulverised-fuel ash and quicklime) were evaluated as possible precursors to composite emplacements in engineering groundwork. The volume proportion of coarse mineral to mixed fines was nominally 3:2, a value that allowed complete sludge infilling between coarse particles while ensuring particles remained in point contact to form a supporting matrix. The results showed that compositions of digested sewage (25% solids) and fuel ash in the approximate mass ratio 2:1, together with 3% quicklime, underwent pozzolanic strengthening to give an unconfined compressive strength of typically 250 ± 30 kPa after several months' ageing. This is similar in strength to stiff soil or soft rock and, in principle, indicates sufficient mechanical integrity for use as foundations beneath light building development or as a bulk fill underlying open amenities. Porosity (4–10%) and hydraulic conductivity (10<jats:sup>−5</jats:sup>–10<jats:sup>−7</jats:sup> m/s) were moderate to low. Interstitial water contained significant concentrations of ammonia and heavy metals, suggesting that effective isolation from the outside environment would be required in field applications. </jats:p>

Journal article

Dudeney AWL, 2007, Waste recovery and re-use: Biostore, Sludge 15 - Technical meeting on the issues and developments in sludge treatment and disposal

Conference paper

Chan BKC, Dudeney AWL, 2007, Biostore: towards sustainable waste reuse, Leiden, Netherlands, International conference on sustainable construction materials and technologies, Publisher: Taylor&Francis/Balkema, Pages: 623-630

Conference paper

Chan BKC, 2007, Reverse osmosis removal of arsenic residues from bioleaching of refractory gold concentrates, Falmouth, UK, Processing and disposal of mineral indutry wastes, PDMIW 07, Publisher: MEi Conferences

Conference paper

Bouzalakos S, Dudeney AWL, 2007, Controlled low-strength materials containing waste precipitates from mineral processing, Falmouth, Processing and disposal of mineral industry wastes, PDMIW 07, Publisher: MEi Conferences, Falmouth

Conference paper

Chan BKC, 2006, Co-utilisation of stabilised sewage sludge, coarse aggregate, PFA and lime in engineered foundations, Wolverhampton, International coal ash technology conference, Ashtech 06, Publisher: UK Quality Ash Association

Conference paper

Dudeney, A W L, Chan, B K Cet al., 2006, Biostore: waste recovery and re-use, London, Publisher: Imperial College London

Report

Bouzalakos S, Dudeney AWL, 2006, CLSM with solid wastes from processing of metal bearing resources, Athens, Greece, 2nd International conference on advances in mineral resources management and environmental geotechnology, AMIREG 2006, Publisher: Heliotopos Conferences, Pages: 293-298

Conference paper

Tyrologou P, Dudeney AWL, Grattoni CA, 2005, Evolution of porosity in geotechnical composites, MAGNETIC RESONANCE IMAGING, Vol: 23, Pages: 765-768, ISSN: 0730-725X

Journal article

Chan BKC, 2005, A sustainable technology to co-utilise organic and mineral wastes in brown field site restoration, Wakefield, UK, 10th European biosolids and biowastes conference, Publisher: Aqua Enviro Technology Transfer

Conference paper

Schifano V, Macleod CL, Dudeney AWL, 2005, Remediation of soils contaminated with petroleum hydrocarbons using quicklime mixing, Leiden, Netherlands, International conference on stabilisation/solidification treatment and remediation, Publisher: A.A. Balkema Publishers, Pages: 69-78

Conference paper

Georgaki I, Dudeney AWL, Monhemius AJ, 2004, Characterisation of iron-rich sludge: correlations between reactivity, density and structure, Meeting on Processing and Disposal of Minerals Industry Wastes 2003, Publisher: Elsevier, Pages: 305-316, ISSN: 1872-9444

This paper discusses the behaviour of iron-rich sludge, a problematic waste product of potable water treatment, minewater/groundwater management and hydrometallurgical processing. The work confirmed the highly hydrous and largely amorphous nature of the sludge and the significant differences that occur in reactivity (rate of acid leaching) and density (densification) depending variously upon the mode of sludge formation, pre-conditioning and storage. A structural study using a combination of FT-IR/ATR, XRD and TG/DTA correlated decreases in reactivity with ageing (i.e., with increases in particle size and/or degree of crystallinity) and increases in density with expulsion of weakly bonded water. The work underpinned studies on recycling of water treatment sludge with ion exchange resins and accelerated densification during sludge management.

Conference paper

Dudeney AWL, Tarasova II, Tyrologou P, 2004, Co-utilisation of mineral and biological wastes in mine site restoration, Meeting on Processing and Disposal of Minerals Industry Wastes 2003, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 131-139, ISSN: 0892-6875

Conference paper

Dudeney AWL, Neville KJ, Tarasova II, Heath AODet al., 2004, Utilisation of ochreous sludge as a soil amendment, Newcastle, International Minewater Association Symposium: Minewater 2004 Process, Policy and Progress, Publisher: University of Newcastle, Pages: 31-39

Conference paper

Dermin OA, Dudeney AWL, 2003, Nitrification in constructed wetlands treating ochreous mine water, Mine Water and the Environment, Vol: 22, Pages: 15-21, ISSN: 1025-9112

Journal article

Dudeney AWL, Demin O, Tarasova I, 2003, Control of ochreous deposits in mine water treatment, Land Contamination & Reclamation, Vol: 11, Pages: 259-266, ISSN: 0967-0513

Journal article

Demin OA, Dudeney AWL, Tarasova II, 2002, Remediation of ammonia-rich minewater in constructed wetlands, ENVIRONMENTAL TECHNOLOGY, Vol: 23, Pages: 497-514, ISSN: 0959-3330

Journal article

Georgaki I, Dudeney AWL, Monhemius AJ, 2002, Characterisation of iron-rich sludges for densification and iron recovery, Environmental Science and Pollution Research International, Vol: 3, Pages: 229-230, ISSN: 0944-1344

Journal article

Tarasova I, Georgaki I, Dudeney AWL, Monhemius AJet al., 2002, Re-use of iron-rich sludges, SWEMP 2002, 7th international symposium on environmental issues and waste management in energy and mineral production, Pages: 1087-1093

Conference paper

Carlile MJ, Dudeney AWL, 2001, The discs of <i>Leptothrix discophora</i>:: lost for 89 years?, MICROBIOLOGY-SGM, Vol: 147, Pages: 1393-1394, ISSN: 1350-0872

Journal article

Tarasova II, Dudeney AWL, Pilurzu S, 2001, Glass sand processing by oxalic acid leaching and photocatalytic effluent treatment, Minerals Engineering 2000, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 639-646, ISSN: 0892-6875

Conference paper

Perry R, Dudeney AWL, 2001, Microbiology and 16S rDNA molecular ecology of a polluting neutral mine drainage sediment, Biohydrometallurgy, Editors: Ciminelli, Garcia, Teixeira, Carvalho, Pimentel, Publisher: Elsevier Publishing Company, Pages: 335-344, ISBN: 9780444506238

Book chapter

Dudeney AWL, Tarasova II, Narayanan A, 2001, Treatment of iron oxalate leachates by anaerobic sludge blanket techniques in the presence and absence of sulphate, 14th international symposium on biohydrometallurgy; fundamentals, technology and sustainable development Part A; Bioleaching, microbiology and molecular biology; Part B; Biosorption and bioremediation, Minas Gerais, Brazil, Publisher: Elsevier, Pages: 373-380

Conference paper

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: respub-action=search.html&id=00001732&limit=30&person=true