Professor Colin Hills BSc, MSc, DIC, PhD, MIMMM, FGS, CSci
BSc, MSc, DIC, PhD, MIMMM, FGS, CSci
Professor in Environment and Materials Engineering
Department of Engineering Science
Faculty of Engineering & Science
Professor Colin Hills is Professor of Environment and Materials Engineering and Director of the Centre for Contaminated Land Remediation at University of Greenwich. He has been actively involved in research and development of stabilisation/solidification (s/s) systems for more than 25 years. His work includes national guidance on s/s of contaminated soil for the Environment Agency (England and Wales), and the development of novel s/s systems. He has received a number of national prizes, including the IChemE Green Chemical Technology Award, the national Shell Springboard prize, and the Times HE Award for his outstanding contribution to Innovation and Technology.
Professor Hills’ work on the beneficial re-use of waste CO2 gas in the treatment (by carbonation) of contaminated soil and waste has resulted in the first commercial production of artificial aggregates. The aggregates were awarded the UK’s Best Recycled Product for 2013, and are used in the world’s first ever carbon negative building block, manufactured by Ligancite in Suffolk.
Professor Hills is a Founder Director of both Carbon8 Systems and Carbon8 Aggregates, spin-out companies of the University of Greenwich.
Professor Hills studied Geology (BSc) and Industrial Petrology (MSc) at Queen Mary College, London. His PhD (Imperial College) in environmental engineering followed a period working as a field geologist in the Middle East and West Africa (Stanger, Intersite, Nigeria Dredging and Marine), and in process technology and engineering for Redland (now Lafarge). Professor Hills joined the University of Greenwich as a Senior Research Fellow in 1998, and was appointed Reader in 2002.
Teaching and administrative activities
- Course co-ordinator for Practical and Professional Skills for Environmental Scientists and Geographers and (L4) and Environmental Management (L5). Both courses are designed to teach fundamental field- and laboratory-based skills to provide an awareness of the importance and impact of environmental science to our wellbeing.
- Delivers the engineering geology provision into the School of Engineering (including a long field-based trip to the Devon), and contributes to the MSc Environmental Conservation programme.
- Postgraduate Tutor for the School of Science and actively involved with ERASMUS Mundus.
- Paris Araizi
- Gabor Dallos.
- The IChemE Green Chemical Technology Prize (2006)
- The Kent Environment Award (2007)
- Kent Innovation Challenge (2007)
- National Winner of the Shell Springboard Challenge (2008)
- The Times Higher Award for Outstanding Contribution to Innovation and Technology (2010)
- UK Recycled Product of the Year (2013).
- Fellow of the Geological Society of London
- Member of the Institute of Materials, Minerals and Mining
- Member of the European Science Foundation Review Panel (2006-present).
- Long-standing member of ISCOWA and the Society of Chemical Industries
- Co-chair of the Kent and Medway Contaminated Land Forum, and organiser of the twice-yearly Soils in the SE Workshop, which attracts >100 delegates to Medway.
- Past Chairman, Cement and Concrete Group, Institute of Materials (IoM3) and past member of the EPSRC Peer review panel (2000-2012).
- Founder and long-serving member of the scientific and organising committee of ACEME
- Active member of ISCOWA and WASCON
- Co-Chair of the International Stabilisation/Solidification Technology Forum held in Canada in June 2010.
- Guest Editor for the International Journal of Environmental Technology and Management and regular reviewer for a number of International Journals including:
- Environmental Science and Technology
- Waste Management
- Journal of Hazardous Materials and Waste and Resource Management.
Dr Hills' current research interests include the application of carbon dioxide gas to treat soil and waste to produce materials that are fit for use in the construction industry. The valorisation of waste streams in this way has involved working with, for example, Shell, BP, Viridor, Grundon and a number of KTNs, including CO2 Chemistry.
- Treatment of soil washing residues (Roberta Maffettone, University of Salerno)
- Investigation of MSW APCr (Josepha Parel, University of Rennes)
- Novel calcium silicate-based sorbents (Jelena Tricovic, University of Novi Sad)
- Carbonation of brucite (Mineralisation Cluster, CO2Chem KTN, and Carbon8)
- Carbonation of steel slag (Tata Steel; ArcelorMittal)
- Treatment of cement manufacturing residues (CEMEX).
Funded research projects
Sustainable Aggregate Production with Imbibed CO2 (SAPICO2): 2013 - 2015
Partners: University of Greenwich (lead), University of Picardie, Carbon8 Systems
Funder: Interreg IV A (Channel Programme), with a value of ≈ €900,000
SAPICO2 is a collaborative project to investigate carbonate-able waste streams in France and the UK for their incorporation into new materials. Project outcomes involve the production and performance evaluation of new building materials for use in construction.
Lead Partner: University of Greenwich
The Passify Project (Performance Assessment of Stabilised/Solidified Waste Forms) investigated the long-term effectiveness of stabilisation/solidification (s/s) of contaminated soil based on:
- The extraction of field samples taken from full-scale application of s/s technology in the USA, France and UK
- The identification of risk indicators in a detailed program of chemical, physical and microstructural testing.
The core partners were the University of Greenwich, University of New Hampshire and INERTEC. CLA:IRE, The Welsh Assembly, the PCA, SITA Environmental Trust and Environmental Geotechnics Ltd. were key funding agencies supporting the investigation.
The US Environmental Protection Agency, The Environment Agency and ADEME were key partners in allowing remediated contaminated sites to be invasively investigated. The University of Birmingham, University of Cranfield, The Royal Engineers.
Passify was awarded Eureka Status (S!3308), by the European Union.
The following main tasks were carried out including on samples taken from Superfund sites in the USA:
- Clarification of the history of use of each site
- Determining site characteristics and identifying pollutant pathways
- Sampling and performance testing
- Long term behaviour studies (ENV 12920)
- Results interpretation, reporting and dissemination.
Maries, Alan, Hills, Colin, Carey, Paula and Ostle, S-J (2013) Linked low carbon manufacture of cement and precast concrete. Advances in Applied Ceramics. Maney Publishing. pp. 202-206. ISSN 1743-6753 ISSN 1743-6753
John, U.E., Jefferson, I., Boardman, D.I., Ghataora, G.S. and Hills, C.D. (2011) Leaching evaluation of the cement stabilisation/solidification treatment of kaolin clay. Engineering Geology. Elsevier B.V.. pp. 315-323. ISSN 0013-7952 ISSN 0013-7952
Gunning, Peter, Hills, Colin D., Antemir, Aurora and Carey, Paula J. (2011) Secondary aggregate from waste treated with carbon dioxide. Proceedings of the ICE - Civil Engineering. In: Proceedings of Institution of Civil Engineers: Construction Materials. ICE Publishing. pp. 231-239. ISSN 0965-089X ISSN 0965-089X
Xue, Gang, Liu, Huanhuan, Chen, Quanyuan, Hills, Colin, Tyrer, Mark and Innocent, Francis (2010) Synergy between surface adsorption and photocatalysis during degradation of humic acid on TiO2/activated carbon composites. Journal of Hazardous Materials. Elsevier B.V.. pp. 765-772. ISSN 0304-3894 ISSN 0304-3894
Antemir, A., Hills, C. D., Carey, P. J., Magnié, M.-C. and Polettini, A. (2010) Investigation of 4-year-old stabilised/solidified and accelerated carbonated contaminated soil. Journal of Hazardous Materials. Elsevier B.V.. pp. 543-555. ISSN 0304-3894 ISSN 0304-3894
Antemir, Aurora, Hills, Colin D., Carey, Paula J., Gardner, Kevin H., Bates, Edward R. and Crumbie, Alison K. (2010) Long-term performance of aged waste forms treated by stabilization/solidification. Journal of Hazardous Materials. Elsevier B.V.. pp. 65-73. ISSN 0304-3894 ISSN 0304-3894
Gunning, Peter, Hills, Colin D. and Carey, Paula J. (2010) Accelerated carbonation treatment of industrial wastes. Waste Management. Elsevier Ltd.. pp. 1081-1090. ISSN 0956-053X ISSN 0956-053X
Chen, Quanyuan, Ke, Yujuan, Zhang, Lina, Tyrer, Mark, Hills, Colin D. and Xue, Gang (2009) Application of accelerated carbonation with a combination of Na2CO3 and CO2 in cement-based solidification/stabilization of heavy metal-bearing sediment. Journal of Hazardous Materials. Elsevier. pp. 421-427. ISSN 0304-3894 ISSN 0304-3894
Gunning, Peter, Hills, Colin and Carey, Paula (2009) Production of lightweight aggregate from industrial waste and carbon dioxide. Waste Management. Elsevier. pp. 2722-2728. ISSN 0956-053X ISSN 0956-053X
Gunning, Peter J., Hills, Colin D. and Carey, Paula J. (2009) Production of lightweight aggregate from industrial waste and carbon dioxide. Waste Management. Elsevier B.V.. pp. 2722-2728. ISSN 0956-053X ISSN 0956-053X
Chen, Quanyuan, Luo, Zhou, Hills, Colin, Xue, Gang and Tyrer, Mark (2009) Precipitation of heavy metals from wastewater using simulated flue gas: sequent additions of fly ash, lime and carbon dioxide. Water Research. Elsevier / IWA Publishing. pp. 2605-2614. ISSN 0043-1354 ISSN 0043-1354
Chen, Quanyuan, Zhang, Lina, Ke, Yujuan, Hills, Colin and Kang, Yanming (2009) Influence of carbonation on the acid neutralization capacity of cements and cement-solidified/stabilized electroplating sludge. Chemosphere. Elsevier. pp. 758-764. ISSN 0045-6535 ISSN 0045-6535
Chen, Q Y, Tyrer, M, Hills, Colin, Yang, X M and Carey, Paula (2009) Immobilisation of heavy metal in cement-based solidification/stabilisation: A review. Waste Management. Elsevier. pp. 390-403. ISSN 0956-053X ISSN 0956-053X
Chen, Q.Y., Tyrer, M., Hills, C. D., Yang, X.M. and Carey, P. (2009) Immobilisation of heavy metal in cement-based solidification/stabilisation: a review. Waste Management. Elsevier. pp. 390-403. ISSN 0956-053X ISSN 0956-053X
Tripathi, Nimisha, Singh, Raj and Hills, Colin (2015) Reclamation of Mine-Impacted Land for Ecosystem Recovery. Wiley-Blackwell, Oxford, UK. ISBN 9781119057901
Bates, Edward and Hills, Colin (2015) Stabilisation and solidification of contaminated soil and waste: Science and practice. Hygge Media, Bury, UK. ISBN 9780993272943
Kumar, Sunil, Mukherjee, Somnath, Ashwath, Najappa and Hills, C.D. (Eds.) (2011) International Journal of Environmental Technology and Management. Special Issue on Advances in Waste Engineering and Management: Part Two. Inderscience Publishers, Olney, Bucks., UK. ISSN 1466-2132
Lake, Craig B. and Hills, Colin D. (Eds.) (2010) 2010 international solidification/stabilization technology forum / Le forum 2010 sur la technologie de la solidification/stabilization. Dalhousie University, Sydney, Nova Scotia, Canada. ISBN 978-0-7703-0026-5
Kumar, Sunil, Mukherjee, Somnath, Aswath, Nanjappa and Hills, C.D. (Eds.) (2010) International Journal of Environmental Technology and Management. Special Issue on Advances in Waste Engineering and Management: Part One. Indersience Publishers, Olney, Bucks., UK. ISSN 1466-2132
Tota-Maharaj, Kiran, Hills, Colin and Cheddie, Denver (2017) Low cost urban wastewater infrastructure for environmental sustainability across Caribbean small island developing states (SIDS). In: NexGen Technologies for Mining and Fuel Industries (NxGnMiFu-2017). Allied Publishers PVT. LTD, New Delhi, India. pp. 697-705. ISBN 9789385926402
Tota-Maharaj, Kiran, Monrose, John and Hills, Colin (2017) Novel permeable pavement systems utilising carbon-negative aggregate. In: NexGen Technologies for Mining and Fuel Industries (NxGnMiFu-2017). Allied Publishers PVT.LTD, New Delhi, India. pp. 683-696. ISBN 9789385926402
Gunning, Peter and Hills, Colin (2015) Negative about carbon: a positive approach. In: ACEME 2015 (Fifth International Conference on Accelerated Carbonation for Environmental and Material Engineering). American Institute of Chemical Engineers (AIChE), New York, USA. pp. 154-161. ISBN 978-1-5108-1549-0
Maries, Alan and Hills, Colin (2015) Ultra-rapid hardening of cement by accelerated carbonation – Past, present and future. In: 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015 (ACEME). AIChE, New York. pp. 274-283. ISBN 978-1-5108-1549-0
Gunning, Peter, Gunning, Robert, Maries, Alan and Hills, Colin (2015) SAPICO2: Production of sustainable construction aggregates through cementation with carbon dioxide. In: WASCON 2015 – Santander, 10–12 June 2015. WASCON 2015, Santander, Spain.
Gunning, Peter, Hills, Colin, Gunning, Robert and Maries, Alan (2015) Carbon Dioxide Sequestration in Wastes: The SAPICO2 Project. In: Proceedings of the 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015. American Institute of Chemical Engineers, New York, NY. pp. 169-177. ISBN 978-1-5108-1549-0
Maries, Alan and Hills, Colin (2013) Homogeneous catalysis of the accelerated carbonation of Portland cement. In: 4th International Conference on Accelerated Carbonation for Environmental and Materials Engineering. ACEME, 2013, Leuven.
Gunning, Peter, Hills, C. D. and Carey, P. J. (2013) Commercial application of accelerated carbonation: Looking back at the first year. In: ACEME 2013. ACEME 2013, Leuven, Belgium. pp. 185-192.
John, U. E., Jefferson, Ian F., Ghataora, Gurmel S., Boardman, D. I. and Hills, Colin (2012) Time dependent leachability and potential environmental implications from stabilization/solidification treatment of chromium contaminated clay. In: 5th International Symposium on Contaminated Sediments: Restoration of Aquatic Environment. ASTM International, West Conshohocken, PA, US. ISBN 9780803175402
Alfieri, Felice, Gunning, Peter, Gallo, Michela, Del Borghi, Adriana and Hills, Colin (2012) Monitoring of carbon dioxide uptake in accelerated carbonation processes applied to air pollution control residues. In: Proceedings of ECOS 2012 - The 25th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. Firenze University Press, Perugia, Italy. pp. 205-217. ISBN 978-88-6655-322-9
Gunning, Peter, Hills, Colin and Carey, Paula (2012) Commercial production of accelerated carbonated aggregate from MSWI APCR. In: Proceedings of the 8th International conference on sustainable management of waste and recycled materials in construction. WASCON, Gothenburg, Sweden.
Hills, Colin (2015) SAPICO2 Project: Setting the scene..
Gunning, Robert and Hills, Colin (2015) SAPICO2: UK and French Waste Processing and Development.
Guning, Peter and Hills, Colin (2014) Carbon negative: First commercial application of accelerated carbonation technology.
Gunning, Peter, Hills, Colin, Araizi, Paris, Maries, Alan and Wray, David (2014) Carbon capture using wastes: A review.
Araizi, P. K., Hills, C. D., Maries, A., Gunning, P. and Wray, D. S. (2013) The current status of commercialisation of carbonation technology. In: ACEME 2013. ACEME 2013. pp. 381-390.
Gunning, Peter, Hills, Colin, Carey, Paula, Greig, Stephen and Schilling, Malte (2012) Carbonation of MSWI APCr for re-use as a light-weight aggregate. In: ASH UTILISATION 2012- Ashes in a Sustainable Society. ASH UTILISATION 2012.