Removal and recovery of vanadium from steel slag leachates with exchange resins

51zhn1r5tplOur team has another publication  entitled: Removal and recovery of vanadium from alkaline steel slag leachates with anion exchange resins by Helena I. Gomes, Ashley Jones, Mike Rogerson, Gillian M. Greenway, Diego Fernandez-Lisbona, Ian T. Burke, and William M. Mayes,  now published on the Journal of Environmental Management.

This work tested the efficiency of anion exchange resins for vanadium removal and recovery from steel slag leachates at pH 11.5.  The results show, for the first time, that the resins can be used successfully to both remove and recover vanadium from steel slag leachate.

As an environmental contaminant, removal of vanadium from leachates may be an obligation for long-term management requirements of steel slag landfills. Vanadium removal coupled with the recovery can potentially be used to offset long-term legacy treatment costs.

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The maximum adsorption capacity  was 27 mg of vanadium per gram of resin. In the column tests, the concentration in the effluent was only 14% of the initial concentration after passing 90 L of steel slag leachate. We could recover 57–72% of vanadium from the resin. Trials on the reuse of the anion exchange resin showed that it could be reused 20 times without loss of efficacy, and on average 69% of vanadium was recovered during regeneration.

PhD opportunity on long-term management of bauxite residues leachates

Our team has now available a Ph.D. opportunity at the University of Leeds on “Long-term management of leachates produced from highly alkaline bauxite residues” with Dr Ian Burke (SEE), Prof Doug Stewart (Civil Eng), Dr Will Mayes (Hull) and Amiel Boullemant (Rio Tinto Legacy Management).

Project Objectives

  1. Investigate the fate and mobility of soluble metals (Al, As, Mo. V) in relevant leachate management systems (e.g. neutralisation, re-circulation) using a combination of on-site measurement and laboratory experimentation (with synchrotron and electron microscopy based characterisation of metal(loid) speciation in the solid phases produced).
  2. Determine the effectiveness of residue treatments (e.g. in situ neutralisation, carbonation reactions) for controlling trace metal(loid) leaching and their long-term role in promoting residue stability and rehabilitation/ revegetation prospects.
  3. Investigate the fate of released oxyanions (chiefly V) in natural environments receiving treated leachates in order to understand the role of interactions with soil minerals and organic matter in controlling metal(loid) mobility and risk.

Project partner(s): Rio Tinto Legacy Management

Contact email: i.t.burke@leeds.ac.uk

You can find detailed information here.

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MAPeRR – Multi-parametric Assessment of Policies for Resource Recovery from Waste

The second MAPeRR meeting was held at the University of Leeds this Monday and the team were together for the first time since our initial inaugural meeting early in the summer. The first challenge of the day was to find the meeting room the second to work out how to use the coffee machine! Both objectives were achieved.20161010_151440

The first half of the meeting was very intense, each member of the team reporting on what they had achieved over the summer. We each  had produced a report and took the other members of the team through our findings. Questions were asked and we discussed the range of issues that were highlighted in each report. We animatedly talked about the ways in which these key issues related to the MAPeRR case study and how these same problems were relevant for the individual projects which form the NERC programme, Resource Recovery from Waste (RRfW). An initial assessment of what the phases of the project required was decided upon and then mentally exhausted we adjourned for a much-needed lunch. Due to the excellence of the food last time we revisited the same restaurant and were equally impressed. We even managed to sit at the same table! We left satisfied and smelling of charcoal and barbecued food.

Back to work, where we planned in more detail the next phases of the project and the work that each of us will be responsible for. The logistics of arranging when we could all get together again and how the work would be achieved were all thrashed out. We have split into teams each team bringing a range of skills from their own area of specialisation to the MAPeRR project. The next few months are definitely going to be interesting and intense! The mood of the meeting was very optimistic and we are all excited about what MAPeRR can achieve in the time we have left.

As dusk drew in goodbyes were said and we are looking forward to meeting up again at the RRfW annual conference in early December!

MAPeRR partners: The Universities of Hull (R3AW), Leeds (C-VORR) and Surrey and Stopford Energy & Environment.

Written by Dr Helen Baxter (R3AW) University of Hull.

R3AW is now a CL:AIRE Research Project

We are pleased to announce that R3AW has been approved by the CL:AIRE Technology and Research Group as CL:AIRE Research Project RP26.

CL:AIRE (Contaminated Land: Applications in Real Environments), the public-private partnership which disseminates best practice to the UK contaminated land sector was already a project partner. Now, with this approval, the project will have a wider broadcast among CL:AIRE members.

The distribution of R3AW results through CL:AIRE will promote interest from developers and consultants in adopting new approaches to managing legacy wastes, particularly those engaged in brownfield developments. According to CL:AIRE, their bulletins, project reports, eAlerts, conferences and workshops, and their website portal reach over 2,000 contacts in the UK and abroad.

 

 

 

 

Come join us in Boston, at the American Association of Geographers’ Annual Conference

Although the development of a circular economy has the potential to alter existing economic trajectories in ways that are more favourable to the environment, the concept has been increasingly subject to critical evaluation. Some commentators see the circular economy as yet another manifestation of ecological modernisation, whereby technological change and appropriate environmental management techniques are deemed sufficient to address global environmental concerns. Thus “little has been said about the socio-political implications and possibilities for shifting current production-consumption-use-waste practices” (Hobson, 2016: 89), nor about the realities of the “messy world” of the circular economy beyond the ‘perfect circles’ of materials and waste envisaged by policy makers (Gregson et al., 2015). As with its predecessor concepts of industrial ecology and industrial symbiosis, the reality of implementation may be a long way from the neat conceptualisations envisaged in the world of policy documents and websites. Moreover, individual product and material cycles cannot be understood in isolation, but need to be viewed as part of a wider system influenced by both the individual elements at work and the context in which they operate. Life cycle thinking and systems thinking can provide a useful entry point into understanding these contexts in order to comprehend the way in which individual elements can impact upon evolution and promotion of a circular economy. The aim of this session is to bring together researchers approaching the concept of a circular economy from a wide range of perspectives in order to further understanding of the barriers to and implications of implementation. We invite a wide range of contributions from those concerned with, and researching into, the circular economy, the green economy, systems analysis, life cycle analysis, degrowth and alternative economy scenarios. We would welcome contributions addressing related issues including, but not limited to, following questions:

  • What are the barriers to developing a circular economy beyond the dominant focus on the technological aspects of resource and material flow management? In particular, what are the institutional and regulatory barriers to change?
  • What are the alternatives to a circular economy policy that focuses on improving technical efficiency without questioning current business and economic growth models?  Are there alternative circular economy practices that align with other conceptualisations of production and growth, such as degrowth?
  • What shifts in routines and practices are required to develop a circular economy and how can these be conceptualised? For example, how do various business and policy actors change their routines? Can we see the development of ‘communities of practice’ around circular economy initiatives?
  • What are the broader socio-political implications of a circular economy agenda? Which forms of governance can encourage or facilitate the circular economy? What is the role of individuals and regulatory structures?
  • The circular economy envisages the world as a set of interwoven systems, but how does a systems approach alter our perspective view of the economy and how do changes in one part of the system impact upon other areas?
  • How can methodologies such as life cycle sustainability assessment be used most effectively to communicate the benefits and impacts of the circular economy to all sectors of society including decision and policy makers?

Please submit an abstract of no more than 250 words for consideration for inclusion in the session by October 7th via email to Helen Baxter (helen.baxter@hull.ac.uk), David Gibbs (d.c.gibbs@hull.ac.uk) or Pauline Deutz (p.deutz@hull.ac.uk). Participants will be notified by October 17th if their paper has been accepted and will then need to register for the conference and provide their PIN to the organisers by October 24th in order to be included in the panel.

Details about the AAG 2017 Conference and how to register/submit an abstract are available here.

 

Written by Prof. David Gibbs, Dr Pauline Deutz and Dr Helen Baxter, University of Hull.

New open access paper on V recovery

Out team just published a new paper on vanadium recovery from red mud leachates using ion exchange resins. The paper is available on open access here.

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Bauxite residue or red mud 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, like vanadium.

This paper focus on vanadium removal and recovery from the leachates, with emphasis on the environmental remediation of bauxite residue disposal areas or closed legacy sites where vanadium is both a contaminant and a metal with economic interest present in the effluent.

As an environmental pollutant, removal of vanadium from leachates may be an obligation of bauxite residue disposal areas (BRDA) long-term management requirements. Vanadium removal from the leachate can be coupled with the recovery, and potentially can be used to offset long-term legacy treatment costs in legacy sites.

This study has shown that anion exchange resins can be used for metal removal and recovery from bauxite residue leachates in a highly alkaline pH range (up to 13).

The results showed that using simulated undiluted bauxite residue leachate as feed solution limited the resin efficacy, due to the presence of competing ions. However, the resins are very effective at V removal for simulated post-closure bauxite residue disposal areas (BRDA) effluent.

In the column experiments, V was readily eluted from the resins in concentrations similar to some industrial process liquors, which holds promise for recovery and recycling of V into downstream industrial processes.

Further research is required to scale-up laboratory findings. This should include assessment pretreatments and optimisation of operating parameters, such as flow rate and bed height. This will help facilitate life cycle assessments of anion exchange resins as a potentially efficient and cost-effective option for both the treatment of bauxite residue leachates and the recovery of metals of critical importance such as vanadium.

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Coffee and a Chat at Tees Valley Wildlife Trust

As part of the R3AW research we are interviewing a wide range of stakeholders to understand how they view the prospects for deployment of the remediation and resource recovery technology that we are developing here at the University of Hull.

 P1080962Dr Pauline Deutz at Coatham Marsh

So with that in mind Dr Pauline Deutz and I set off up to Tees Valley Wildlife Trust to find out about their experiences of managing a site which was formed by the legacy of Redcar’s industrial past, but is affected by leachate from historic steel slag. After having driven over the spectacular North York Moors we pulled up outside the Trust’s offices and were warmly welcome with an offer of a much-needed cup of coffee. Our interviewee, who heads up the team at the Tees Valley Wildlife Trust, spoke to us for over an hour about the issues pertaining to managing such a complex site, which is bordered by Redcar town on one side and Redcar Steelworks on the other. Coatham Marsh is home to a myriad of wildflowers and over 200 species of birds as well as providing a haven for small mammals and invertebrates . Protecting sites such as this from the effects of legacy steel slag while recovering valuable resources is fundamental to the approach being taken by the R3AW research team. The experiences and thoughts of stakeholders like Tees Valley Wildlife Trust are helping us to understand how the current policy and regulatory environment is working and what other factors influence the way in which areas impacted by historic and legacy steel slag off being managed.

P1080958Looking out from Coatham March to the steel works

After we had to finished the interview we were given directions on how to get to Coatham Marsh so we could see for ourselves the work being done by Tees Valley Wildlife Trust and understand the interesting geography of the site which is bisected by a railway line! Once we found our way to the site, we were greeted by steel sculptures including, reeds and even a pair of walking boots and a rucksack. Despite dullness of the day and the ever threatening prospect of a downpour the site itself provided us with ample colour with displays of wildflowers, ponds and reed beds. Looking east out over the sea provided us with a dramatic view of offshore wind turbines and the view to the north the Redcar Steelworks. We explored the site for over an hour seeing the variety of flora and fauna that Coatham Marsh is home to. The impact that the legacy from the steel slag that surrounds site is something that the research of the R3AW project will hopefully be able to resolve so that sites like this can continue to provide a home for wildlife and a resource for local people into the future. Coatham provides a dramatic illustration of the way in which industry has shaped the environment and is continuing to do so, juxtaposing the rich and biodiverse Marsh with the Redcar Steelworks and Teesside Offshore wind farm.

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Example of the art work found at Coatham

We would like to thank Tees Valley wildlife trust for sparing the time to talk to us, the contribution of stakeholders and their willingness to talk to us as part of this research project is much appreciated by everyone on the R3AW team.

Written by Dr Helen Baxter, University of Hull.

 

 

MAPeRR – Multi-parametric Assessment of Policies for Resource Recovery from Waste

AIM: Mapping policies and legislation and their impact on sustainable resource recovery from waste.

 

The first strategy meeting of MAPeRR took place in Leeds yesterday. This is a six-month collaborative mini project being funded by NERC under their Resource Recovery from Waste (RRfW) initiative. Three universities, Hull (R3AW),  Leeds (C-VORR) and Surrey, are involved as well Stopford Energy & Environment who are collaborating with Lancaster Environment Centre.

Once we all finally the arrived we settled down to working out exactly what it was we want to achieve and how on earth we were going to manage it! We also needed a project name with a catchy acronym. This was going to be no easy matter. Much discussion followed during the morning and we decided that this was going to be very complex job. We managed to make some decisions during the morning, like who was going to take on which responsibilities within MAPeRR (someone has to be in charge of making sure we all get fed).  After such an exhausting morning re-fuelling was required so we all went for lunch to an Italian restaurant which Eleni (working on C-VORR) recommended. This interlude was much needed and the conversation flowed accompanied by good food provided in generous portions!

MAPPeR

 

The afternoon we really got down to the nitty-gritty! Excitement and enthusiasm for MAPeRR was tangible in the room and no one seemed to want to leave at the end of the day, some members of the team having to rush to avoid missing the train! We all now have a busy summer in front of those having allocating work to the individual team members to come see before our next meeting.

MAPeRR VISION

Develop an evidence based map that will enable us to identify gaps and interventions between existing policies and waste practices and to ensure sustainability and resilience of resource recovery management practices.

 

Written by Dr Helen Baxter (R3AW) University of Hull.

 

 

Project meeting

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Today, at the University of Hull, we had our annual meeting to present and discuss project updates. The agenda covered the progress to date, key achievements, programme-level activity (Will Mayes), as well as all the five project work packages updates and plans:

    1. WP1 – Biogeochemical processes controlling metal(loid) release from
      alkaline residues (Andy Hobson, Ian Burke / Doug Stewart)
    2. WP2 – Remediation and recovery: demonstration of metal(loid) recovery and WP3 – Upscaling release and recovery under environmental conditions (Helena Gomes, Mike Rogerson, Will Mayes)
    3. WP4 – Systems analysis: policy frameworks, stakeholder engagement and LCA (Pauline Deutz, Helen Baxter, Amanda Gregory, Jonathan Atkins)
    4. WP5 – Technology transfer – feasibility studies on other alkaline wastes (Andy Bray, Will Mayes)
    5. Mobile laboratory (Mike Rogerson)

Anne Velenturf, Programme Coordinator of the RRfW, was also present.

Radio interview for Beyond Zero Emissions, 3CR radio

Dr Helena I. Gomes and Dr Helen Baxter, both postdoctoral research associates of the project, were interviewed by Anthony Daniele and Matthew Grantham for the Beyond Zero radio program. This program focuses on Climate Change Science and Solutions, airs bi-weekly in Melbourne, Australia on 3CR Radio, and is broadcasted via the Community Radio Satellite.

Previous guests on the program include:
Dr David Suzuki
Dr James Hansen – NASA
Prof Martin Green – UNSW
Mr Arnold Goldman – Luz II
Dr David Mills – Ausra
Dr Keith Lovegrove – ANU BigDish

The interview was about the article on vanadium published recently on The Conversation.  Vanadium is the key element used in redox flow batteries which can store large amounts of energy almost indefinitely, perfect for remote wind or solar farms.

Listen the podcast here.

interview