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Leaching behaviour of co-disposed steel making wastes: Effects of aeration on leachate chemistry and vanadium mobilisation (2018)
Journal Article
Hobson, A. J., Stewart, D. I., Mortimer, R. J., Mayes, W. M., Rogerson, M., & Burke, I. T. (2018). Leaching behaviour of co-disposed steel making wastes: Effects of aeration on leachate chemistry and vanadium mobilisation. Waste Management, 81, 1-10. doi:10.1016/j.wasman.2018.09.046

Steelmaking wastes stored in landfill, such as slag and spent refractory liners, are often enriched in toxic trace metals (including V). These may become mobile in highly alkaline leachate generated during weathering. Fresh steelmaking waste was char... Read More

Options for managing alkaline steel slag leachate: A life cycle assessment (2018)
Journal Article
Gomes, H. I., Mayes, W. M., Baxter, H. A., Jarvis, A. P., Burke, I. T., Stewart, D. I., & Rogerson, M. (2018). Options for managing alkaline steel slag leachate: A life cycle assessment. Journal of cleaner production, 202, 401-412. doi:10.1016/j.jclepro.2018.08.163

Management of steel slag (a major by-product of the steel industry) includes the treatment of highly alkaline leachate (pH > 11.5) from rainwater infiltration of slag deposits to prevent adverse impact upon surface or ground waters. This study aims t... Read More

Behaviour and fate of vanadium during the aerobic neutralisation of hyperalkaline slag leachate (2018)
Journal Article
Hobson, A. J., Stewart, D. I., Bray, A. W., Mortimer, R. J., Mayes, W. M., Riley, A. L., …Burke, I. T. (2018). Behaviour and fate of vanadium during the aerobic neutralisation of hyperalkaline slag leachate. The Science of the total environment, 643, 1191-1199. doi:10.1016/j.scitotenv.2018.06.272

© 2018 Vanadium is a toxic metal present in alkaline leachates produced during the weathering of steel slags. Slag leaching can therefore have deleterious effects on local watercourses due to metal toxicity, the effects of the high pH (9–12.5) and ra... Read More

A microbial role in the construction of Mono Lake carbonate chimneys? (2018)
Journal Article
Brasier, A., Wacey, D., Rogerson, M., Guagliardo, P., Saunders, M., Kellner, S., …Reijmer, J. (2018). A microbial role in the construction of Mono Lake carbonate chimneys?. Geobiology, 16(5), 540-555. doi:10.1111/gbi.12292

Lacustrine carbonate chimneys are striking, metre‐scale constructions. If these were bioinfluenced constructions, they could be priority targets in the search for early and extraterrestrial microbial life. However, there are questions over whether su... Read More

Recovery of Al, Cr and V from steel slag by bioleaching: batch and column experiments (2018)
Journal Article
Gomes, H. I., Funari, V., Mayes, W. M., Rogerson, M., & Prior, T. J. (2018). Recovery of Al, Cr and V from steel slag by bioleaching: batch and column experiments. Journal of environmental management, 222, (30-36). doi:10.1016/j.jenvman.2018.05.056. ISSN 0301-4797

Steel slag is a major by-product of the steel industry and a potential resource of technology critical elements. For this study, a basic oxygen furnace (BOF) steel slag was tested for bacterial leaching and recovery of aluminium (Al), chromium (Cr),... Read More

Hydraulic and biotic impacts on neutralisation of high-pH waters (2017)
Journal Article
Gomes, H. I., Mayes, W. M., Rogerson, M., Burke, I. T., & Stewart, D. I. (2017). Hydraulic and biotic impacts on neutralisation of high-pH waters. The Science of the total environment, 601-602, (1271-1279). doi:10.1016/j.scitotenv.2017.05.248. ISSN 0048-9697

The management of alkaline (pH 11–12.5) leachate is an important issue associated with the conditioning, afteruse or disposal of steel slags. Passive in-gassing of atmospheric CO2 is a low cost option for reducing Ca(OH)2 alkalinity, as Ca(OH)2 is ne... Read More

A depositional model for spherulitic carbonates associated with alkaline, volcanic lakes (2017)
Journal Article
Mercedes-Martín, R., Brasier, A. T., Rogerson, M., Reijmer, J. J., Vonhof, H., & Pedley, M. (2017). A depositional model for spherulitic carbonates associated with alkaline, volcanic lakes. Marine and Petroleum Geology, 86, (168-191). doi:10.1016/j.marpetgeo.2017.05.032. ISSN 0264-8172

The South Atlantic Aptian ‘Pre-salt’ reservoirs are formed by a combination of spherulitic carbonates and Mg-rich clays accumulated in volcanic alkaline lake settings with exotic chemistries. So far, outcrop analogues characterised by metre-thick suc... Read More

Timing and causes of North African wet phases during the last glacial period and implications for modern human migration (2016)
Journal Article
Hoffmann, D. L., Osborne, A. H., Fello, N. M., Moseley, G. E., Spoetl, C., Rogerson, M., …Vance, D. (2016). Timing and causes of North African wet phases during the last glacial period and implications for modern human migration. Scientific reports, 6(1), doi:10.1038/srep36367. ISSN 2045-2322

We present the first speleothem-derived central North Africa rainfall record for the last glacial period. The record reveals three main wet periods at 65-61 ka, 52.5-50.5 ka and 37.5-33 ka that lead obliquity maxima and precession minima. We find add... Read More

Vanadium removal and recovery from bauxite residue leachates by ion exchange (2016)
Journal Article
Jones, A., Gomes, H. I., Mayes, W. M., Rogerson, M., & Burke, I. T. (2016). Vanadium removal and recovery from bauxite residue leachates by ion exchange. Environmental science and pollution research international, 23(22), (23034-23042). doi:10.1007/s11356-016-7514-3. ISSN 0944-1344

Bauxite residue is an important by-product of the alumina industry, and current management practices do not allow their full valorisation, especially with regard to the recovery of critical metals. This work aims to test the efficiency of ion exchang... Read More

Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects (2014)
Journal Article
Pedley, H., Greenway, G., Rogerson, M., Wadhawan, J., & Saunders, P. (2014). Mg/Ca ratios in freshwater microbial carbonates: Thermodynamic, kinetic and vital effects. Geochimica et cosmochimica acta, 147, (107-118). doi:10.1016/j.gca.2014.10.014. ISSN 0016-7037

The ratio of magnesium to calcium (Mg/Ca) in carbonate minerals in an abiotic setting is conventionally assumed to be predominantly controlled by (Mg/Ca)solution and a temperature dependant partition coefficient. This temperature dependence suggests... Read More

Were rivers flowing across the Sahara during the last interglacial? Implications for human migration through Africa. (2013)
Journal Article
Ramirez, J. A., Bruecher, T., Coulthard, T. J., Rogerson, M., Barton, N., & Brücher, T. (2013). Were rivers flowing across the Sahara during the last interglacial? Implications for human migration through Africa. PloS one, 8(9), (0-0). doi:10.1371/journal.pone.0074834. ISSN 1932-6203

Human migration north through Africa is contentious. This paper uses a novel palaeohydrological and hydraulic modelling approach to test the hypothesis that under wetter climates c.100,000 years ago major river systems ran north across the Sahara to... Read More

Vertical density gradient in the eastern North Atlantic during the last 30,000 years (2011)
Journal Article
Ramirez, J., Rogerson, M., Bigg, G. R., & Rohling, E. J. (2012). Vertical density gradient in the eastern North Atlantic during the last 30,000 years. Climate Dynamics, 39(3-4), (589-598). doi:10.1007/s00382-011-1148-4. ISSN 0930-7575

Past changes in the density and momentum structure of oceanic circulation are an important aspect of changes in the Atlantic Meridional Overturning Circulation and consequently climate. However, very little is known about past changes in the vertical... Read More

Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz (2010)
Journal Article
Rogerson, M., Schönfeld, J., & Leng, M. J. (2011). Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz. Marine Geology, 280(1-4), (150-167). doi:10.1016/j.margeo.2010.12.008. ISSN 0025-3227

Palaeoceanography relies on the assumption that parameters measureable in sediment cores correlate reliably to hydrographic parameters. Areas of dynamic watermass mixing, which generally have steep hydrographic gradients, therefore provide both a tem... Read More

New insights into biological influence on the geochemistry of freshwater carbonate deposits (2008)
Journal Article
Pedley, H. M., Wadhawan, J. D., Rogerson, M., Wadhawan, J., & Middleton, R. (2008). New insights into biological influence on the geochemistry of freshwater carbonate deposits. Geochimica et cosmochimica acta, 72(20), (4976-4987). doi:10.1016/j.gca.2008.06.030. ISSN 0016-7037

Ambient temperature freshwater carbonates ("tufas") have outstanding potential as palaeoclimate archives. However, it has proven difficult to constrain the behaviour of the geochemical parameters on which important proxy systems rely. Current thinkin... Read More