Do you know who our researcher are?

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Our previous newsletter introduced you to the ADVOCATE project, and the scientific research that was being undertaken. But who are our researchers?

We would like to introduce you to our Fellows, and hope you enjoy getting to know them!They are from: Canada, Colombia, Czech Republic, France, Germany,Ghana, Honduras, India, Poland, Spain, South Africa and Ukraine. And the disciplines represented are:Biochemistry, Biotechnology, Chemical Engineering, Environmental Engineering, Environmental Geoscience, Environmental Studies,Geology, Microbiology, and Water Management.

The multidisciplinary nature of our team ensures we will successfully develop the aims of the ADVOCATE project, to find innovative in situ remediation technologies by optimising resource investment in environmental restoration whilst considering technical, social and economic factors.

For learning more about the life and future of our fellows, click here !!Advocate Newsletter spring 2013

Brownfield land, why not a valuable resource

CL:AIRE’s goal is to support the beneficial use of Brownfield land and remediation technologies.

Brownfield land (defined as redevelopment of previously used land) can affect everyone, whether by the blight caused by living or working in close proximity to a Brownfield site, through involvement with the regulation of possible harmful effects from the land, or in the redevelopment and reuse of the land. However, brownfield land can be a valuable resource that is often not exploited to its full potential. Returning Brownfield land to beneficial use can contribute to sustainable development of our towns and cities by reducing pressure on Greenfield sites, whether for housing, commercial or amenity use. Concentrating development on Brownfield sites can help to make the best use of existing services such as transport and waste management.

As well, there is a close relationship between Brownfield land and contaminated land. Many Brownfield sites are former industrial sites and as such may have been contaminated by previous uses. The term ‘land contamination’ covers a wide range of situations where land is contaminated in some way. In a small number of these situations where certain criteria are met, a site might be determined ‘contaminated land’ which has a specific definition set out in legislation.

In this connection, Contaminated Land: Applications in Real Environments (CL:AIRE) has  as objective to raise standards and develop and promote good practice in the clean-up of land affected by contamination. It is the UK’s Brownfield and contaminated land information provider. It has a track record developing good practice in partnership with different stakeholders depending on the subject and it has developed a number of new solutions and practices looking at innovative ways to deal with contaminated soil and groundwater and reuse of soils in a sustainable way.

CL:AIRE’s goal is to support the beneficial use of Brownfield land and remediation technologies.

CL:AIRE’s work promotes the clear benefits of remediating and re-using land such as:

  • Bringing commercial, environmental and business value back to the land.
  • Enabling economic activity and inward investment.
  • Reducing contaminated soil taken to landfill.

CL:AIRE is committed to increasing the uptake and development of innovative and practical solutions to the remediation of land affected by contamination. Its expertise enables it to focus on the following core goals:

  • To provide a unique system of independent appraisals for technologies, monitoring and site investigation techniques to give confidence to site owners and developers.
  • To communicate scientifically credible and practical information on land affected by contamination and remediation to all interested parties.
  • To provide support to private and public bodies in accelerating the sustainable regeneration of Brownfield land and land affected by contamination.
  • To promote business opportunities for all its partners, by linking problem holders with appropriate solutions.

Happy World Environment Day 2013

2013 marks the 40th Anniversary of World Environment Day, every year on June 5th for forty years, people across the planet celebrate the United Nations World Environment Day. It is a day for action. Hundreds of thousands of activities take place in virtually every country in the world to improve the environment now and for the future. Not to be outdone, the ADVOCATE project wishes to help in this day to promote the importance of developing innovative in situ remediation concepts for the sustainable management of contaminated land and groundwater for improving the Environment for us and our future.

Over the past several decades, increasing human population, economic development, and emergence of global markets, have resulted in immense pressures on natural resources, and these pressures are expected to intensify further over the next few decades. Throughout this project, we are seeking to address a solution to the four critical technical and socio-economic issues facing the sustainable use and development of groundwater resources in Europe (i) existing and future requirements to protect, improve and increase the quality and quantity of groundwater resources; (ii) cost-effective and sustainable re mediation strategies for land and groundwater contamination; (iii) huge legacy of contaminated sites impacting groundwater across Europe which compromises the socio-economic well being and sustainable development of Member States, and (iv) the chronic shortage of skilled professionals in this area to deal with such problems.

Petra Hedbavna, from the University of Sheffield and fellow of the ADVOCATE project, is using bacterial batteries to generate electricity from groundwater pollution. Basically, the bacteria can remove toxic compounds from aqueous solutions and generating electricity at the same time that the pollutants are being removed. In this connection, Petra explains that groundwater can be contaminated by organic compounds which compromise the water quality (Figure 1). As well, it is known that bacteria present in groundwater are able to biodegrade this pollution but they require oxygen for respiration, which can be supplied with the traditional technology, pumping oxygen, against, it is consumed electricity.

Figure 1

However, a new technology is being carried out where the electricity is produced while contamination is biodegraded by means of what is called – microbial fuel cells. This microbial fuel cell technology used for biodegradation enhancement is potentially highly sustainable because electricity is not consumed but produced. Microbial fuel cells used for enhanced biodegradation are still in development, only tested under laboratory conditions (Figure 2). The amount of electricity produced by this technology is not significant and it is not going to solve the world energy crisis. The main advantages are increasing the biodegradation rate of contamination and electricity savings.

Figure 2

It is also important to note that not only scientists developing new technologies for electricity production that can make a difference to the environment. Saving energy at work and at home on daily basis can decrease the world electricity consumption significantly. The University of Sheffield promotes electricity saving by a programme called Energy Matters. Money saved on electricity bills is used for student scholarships (you can find more information on the university webpage Energy_Matters).

Another possibility for removing the pollutants from groundwater is using permeable reactive multi-barrier (PRmB) systems as a sustainable in situ technology for the remediation of groundwater contaminated with mixed organic/inorganic contaminants. Franklin Obiri-Nyarko, from Hydrogeotechnika Ltd in Poland and fellow of the ADVOCATE project, is investigating new and potentially suitable reactive materials for treating these contaminants, as well as evaluating and enhancing the long-term performance of the PRmB system. The focus of his experiments are on the assessment of the removal efficiencies of these materials, understanding the contaminant removal processes, and deducing the key barrier parameters to develop the pilot-scale PRmB system. The performance of the pilot installation coupled with modelling studies will be used to assess the longevity of the system. The results will play a major role in improving the generic understanding and in advancing knowledge of both the scientific and technical aspects of this technology.

This vision of our project is just a small part upon which the entire project is consisted. 14 fellows are involved coming from 20 academic and industry partners throughout five different countries providing to the project a close integration of various scientific, technical, environmental and socio-economic aspect.

We, also, won’t fail on this occasion to remind you, this year’s theme focuses on food waste and food loss. Think.Eat.Save. Reduce Your Foodprint is the new campaign of UNEP and the Food and Agricultural Organization of the UN. It draws attention both to the issue and the absurdity that high volumes of perfectly edible produce are never making it from the farm to the fork.

Indeed, at least one third of everything we grow on this planet is lost between the field and the consumer. It is an ethical, economic and environmental issue given the enormous waste of energy, water, fertilizers and other inputs as a result of food that is produced but never eaten. Each one of us can do something about this, from this post we invite people across the world to make an effort to both raise awareness and to take practical actions whether in your home, when you are buying in the supermarket or well anywhere. Because by reducing food waste, we can save money, minimize environmental impacts and make food production more sustainable and resilient. Most importantly, we can move towards a world where everyone has enough to eat.

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HAPPY WORLD ENVIRONMENT DAY ’13

New system for giving us the keys to understand the complexity of the soil

Natalia and the group which is involved, will proceed with the installation of the Vadose Monitoring System (VMS) during the first week of June (3-7 June) in Belgium. As it advances, we will able to explain with more detail the system with videos and photos and obviously the results that will be of great interest.

New system for giving us the keys to understand the complexity of the soil.

New system for giving us the keys to understand the complexity of the soil

Soil is a finite and complex resource and understanding it is a challenge for us all. The soil is constantly changing and has a significant impact when this is studied in real cases because the soil is live and is not an inert system! As consequence, due to the complexity of real soil behaviour it is not possible to cover a detailed understanding of the characterization of pollutants at the site-scale. In view of that, Natalia Fernandez from University of Liège, in order to overcome such difficulties in soil and groundwater pollutant characterization, has set up a field experiment to investigate the fate and transport of pollutants from vadose zone and across groundwater at a former industrial site in Belgium. It is interesting underlining what a vadose zone is exactly, extending from the terrestrial surface to the top of the groundwater.

As a result of the legacy of the activities on site there is significant contamination by pollutants such as cyanide, CN− (cyanides are used widely and extensively in the manufacture of synthetic fabrics and plastics, metal mining operations, as pesticides and intermediates in agricultural chemical production) BTEX, Benzene, Toluene, Ethylbenzene and the Xylene isomers (are coming from industrial activities, traffic emission), PAHs, polycyclic aromatic hydrocarbons (are mainly derived from anthropogenic activities related to pyrolysis and incomplete combustion of organic matter) and heavy metals in soil and groundwater that are giving rise an impact of indirect manner on our health.

The new system will attempt to give us the keys to obtain a detailed understanding of the characterization of pollutants at the site‐scale and their fate and transport in the soil‐groundwater. As Natalia says “The combined experiment will consist of a tracer test performed directly in the vadose zone via infiltration rings, located within an infiltration pond. Two inclined boreholes will be drilled below the infiltration pond, both containing a vadose monitoring system (VMS). Additionally, this system will comprise different elements, among which are the vadose sampling ports and flexible time domain reflectometry probes (FTDR). Sampling ports will be used for sampling pore water in the vadose zone, whereas the FTDR probes measure water content. As well, these measurements will be used for determining solute fluxes. Finally, additional boreholes will be installed in the unsaturated zone to conduct cross-hole geophysics with the aim of monitoring contaminants and tracers as they move into the saturated zone”.

Natalia and the group which is involved, will proceed with the installation of the Vadose Monitoring System (VMS) during the first week of June (3-7 June) in Belgium. As it advances, we will able to explain with more detail the system with videos and photos and obviously the results that will be of great interest.

Do you know all about the ADVOCATE project ?

Our research topics encompass both socio-economic and sustainability aspects and different remediation processes depending on several factors. Issues as important as the quantification of contaminant transport, biogeochemical processes and degradation at field scale are being developed at the Université de Liége in Belgium. Natalia Fernandez is one of the early-stage researchers that make up the ADVOCATE team and is working at the Université of Liége. Natalia’s research is exploring links between soil and vadose zone processes for in situ remediation of groundwater. Although risk analysis and mitigation programmes for polluted soil and groundwater are used to understand pollutant fate and transport, certain shortcomings have been identified. Consequently, Natalia is developing an efficient and robust procedure for assessing pollutant transport from the pollution site to the groundwater body.

As well, the groundwater-surface water interface is an important factor when a remediation soil treatment is being developed, that is why Vidhya Viswanathan from EAWAG in Switzerland and Uwe Schneidewind from Flemish Institute for Technological Research in Belgium have to focus their efforts on the studies about the influence of surface water-groundwater interaction and the subsurfaces heterogeneities respectively. In view of that, Vidhya’s project examines the impact of restoration on the function of the river Thur in Switzerland. This is done by looking at diurnal and seasonal changes in flow and water quality. The search will identify and measure different parameters to see how these influence each other, as a descriptor of this interaction between the two environmental systems. In related work, Uwe is investigating which parameters are of importance and how they are related to each other in the context that the groundwater-surface water interface of lowland rivers often shows increased contaminant attenuation potential compared with the adjacent aquifer. For this he is conducting modelling studies to determine reaction rates and hydraulic parameters, and their interdependence across different spatial and temporal scales. The results of both will allow up-scaling of attenuation and identify how variation in these due to heterogeneity affects prediction of attenuation.

Also, when a site is contaminated by heavy metals, those can not be degraded, the only existing risk reduction measures are removal or immobilization using different technologies such as In Situ Bioprecipitation (ISBR). The permeable reactive multi-barrier (PRmB) system is a relatively new technology that Franklin Obiri Nyarko from Hydrogeotechnika in Poland is using for treating specific contaminants, as well as evaluating and enhancing the long term performance of the PRmB systems. The results will play a major role in improving the general understanding and advancing knowledge of both the scientific and tecnical aspects of this technolgy. Whereas Franklin is working with mixed organic contaminants (BTEX) and some heavy metals and is also collaborating with Johana Grajales from AGH University of Science and Technology in Poland too, who is using the same system in her laboratory studies, field work and numerical modelling for removing tetrachloroethylene (PCE) and trichloroethylene (TCE) from Nowa Deba field site. Her first results show that the feasibility studies indicated that the installation of a PRmB system may be effective to reduce TCE and PCE concentration under the site specific conditions.

Based on the results of Franklin, Okasana Voloschenko from The Helmholtz Centre for Environmental Research in Germany will conduct field studies at sites with existing barriers and diffuse pollution to examine up-scaling of design parameters determined previously by Franklin. Moreover, her research explores the role of aerobic and anaerobic microbial processes in the removal of ammonium from contaminated groundwater in constructed wetlands (Cws), using a study site located downstream of the Leuna industrial chemical area in Germany. As well, Ben Doulatyari from EAWAG in Switzerland will interpret the results with multi-scale modelling tools and statistical methods to develop performance-based criteria for the design, monitoring and assessment of sequenced reactive barriers. Also, Ben is studying in the river Thur the dynamics of the vegetartion biomass at different points of the stream, as well as catchment hydraulics, managed aquifer recharge and natural attenuation processes.

To cover all points of view regarding the remediation processes within the project it is necessary to study both the bioremediation processes and the framework, methods and tools which advance the use of these sustainable systems. That is why, on the one hand, Alice Badin from University of Neuchatel in Switzerland is focusing her project on sites contaminated with chlorinated solvents using a useful method of measuring the isotopic signature of solvents that could be a great help in providing a rigorous basis to identify the source and timing of chemicals released to groundwater. And on the other hand, Petra Hesbavna from University of Sheffield in United Kingdom is developing a microbial fuel cells for enhancement of in situ bioremediation of soil and groundwater because the microbial fuel cells are believed to be one of the future sources of sustainable energy. Organic compounds are degraded by microbial metabolism and electrons released during this process are transferred to the electrode of the microbial fuel cell . The Petra’s results show that this groundwater composition will be an ideal inoculum for a microbial fuel cell system, to test the concept as a method for the enhanced bioremediation of contaminated groundwater.

Using geostatistical, probabilistic and numerical modelling methods is possible to evaluate the technologies and approaches used throughout the project. The goal is to develop a unified framework for ISR. In this connection, Juan Pena from Université de Liége in Belgium is focused his research on characterization of the subsurfaces medium, which will lead to new conceptual ways of the modelling that account for the properties of, and interactions between, selected reactive tracers and soil aquifer materials, and on developing optimized single and multiple-well tracer techniques. Likewise, Lukasz Cieslak from University of Sheffield in United Kingdom is exploring interactions between microorganisms in aquifers, which use a range of oxidants to biodegrade organic contaminants. This creates a sequences of zones in contaminated groundwater, which represent different terminal electron accepting processes (TEAP). Lukasz has completed an initial sampling programme to characterise the hydrochemistry and microbiology of an organic contaminant plume fringe at the site, using a series of high-resolution multilevel samplers.

Because the economic aspect is the most important factor for the stakeholders, without being cost-effective the technology will not be introduced within the foreseeable future. Consequently, Alistair Beames from The Flemish Institute for Technological Research is developing a decision-support framework to assist stakeholders in choosing between brownfield revitalization alternatives. Brownfield revitalization planning entails the careful consideration of remediation alternatives capable of reducing contamination level to the required target values, as well as determining the optimal land-use scenario for the remediated site. Also, Alistair is developing the Social Impact Assessment component of the eventual decision-support framework, the focus of the review is on whether the social aspect of sustainability is adequately accounted for in these existing tools.

Finally, my name is Ruth García de la Calle and I am the person that will try to promote the network and bring closer to the public everything relating to the remediation of soil and groundwater to give you an easy scientific understanding about this topic.

Welcome to ADVOCATE project

The ADVOCATE Project (Advancing Sustainable In Situ Remediation for Contaminated Land and Groundwater), is a Marie Curie Initial Training Network funded by the European Union and exciting collaboration between leading European institutions to provide advanced training to young researchers in the field. The network aims to develop innovative in-situ approaches for sustainable management and remediation of soil and groundwater contamination, in ways that traditional methods have not been as successful. The interdisciplinary and multi-scale research will provide solutions for improved decision-making, management strategies and technology applications, putting in-situ remediation at the forefront of sustainable contaminated land management in Europe.

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