CASE PhD: Bioleaching Superalloy Waste for Tantalum Recovery

CASE PhD: Bioleaching Superalloy Waste for Tantalum Recovery

Can biologically mediated separation recover tantalum, or does it only make a residue more tantalum-rich? This Coventry MIBTP CASE doctorate distinguishes dissolving tantalum from removing other metals while retaining it in a solid. Coventry and Advanced Alloy Services connect bioleaching research with industrial feedstock expertise. Related nickel/cobalt results establish experience, not a demonstrated tantalum recovery outcome. The published October 2026 call lists 23 November 2026 as the deadline for October 2027 entry; current acceptance status is unconfirmed. The closing time and time zone were not stated. International fee-gap support is competitive; personal qualification, English and Coventry portal requirements still need confirmation. Official project; Coventry call.

Research Problem and Doctoral Work

Tantalum is valuable in superalloys and electronics, yet its resistance to chemical attack also makes it difficult to recover from industrial residues. The official CASE project tests two different ideas: mobilising tantalum into solution using biologically derived compounds, and removing other metals while retaining tantalum in an enriched solid. The second route is described as inverse bioleaching. A more tantalum-rich residue is an intermediate material; its mass, purity, remaining contaminants and subsequent processing determine whether enrichment becomes useful recovery.

The advertised doctorate studies microbe–metal interactions, metabolic activity and responses to metal-rich industrial feedstocks. It relates biological behaviour to metal speciation and selective mobilisation. Calcium and tungsten are named contaminants of interest in the inverse route. These are research objectives. No public evidence establishes a chosen organism, a validated tantalum recovery percentage, a saleable product specification or a working industrial tantalum process for this studentship.

The central scientific difficulty is selectivity across a heterogeneous feed. Removing much of a common metal can leave a higher tantalum concentration even if some tantalum is lost; concentration and absolute recovery therefore answer different questions. Conversely, dissolving tantalum does not establish its separation from other dissolved metals. The useful doctoral contribution would be an explanation of these trade-offs supported by credible characterisation and material balances. These are analyst interpretations of the advertised problem, rather than additional promised tasks or numerical success thresholds.

The UK critical-minerals annex lists tantalum and tungsten; tantalum is a critical metal, not a rare-earth element. The current national strategy supports secondary-resource processing and recycling skills, while acknowledging commercial, financing and energy constraints. This gives the field a policy and industrial rationale, without establishing a guaranteed market for this particular process. Lower-temperature biological processing also does not by itself establish lower lifecycle impact; inputs, downstream separation, residues and energy use need comparison.

School, Field and Doctoral Training

Coventry University is the named university of registration and intended doctorate-awarding institution. The host's current MIBTP page places its projects in the Centre for Discoveries in Life Sciences; some staff biographies and research pages retain the older Centre for Health and Life Sciences name. Warwick hosts MIBTP's shared web directory, while Advanced Alloy Services supplies industrial collaboration. Neither role establishes a Warwick degree, a joint award or salaried industrial employment. The university's official location is Coventry, United Kingdom.

The exact public PGR+ entry, linked from Coventry's CASE row, carries course code DLSR002 and the administrative area Clinical Sciences and Translational Medicine. The advertised work itself concerns industrial metal recovery. Ask the host to explain the formal course, centre and progression arrangements rather than interpreting that portal label as evidence of a clinical research project. The public page was accessible before registration; the application form behind account creation was not examined.

Coventry is joint 581 in QS World University Rankings 2027. This overall ranking is a limited institutional-brand signal and gives no bioleaching-subject or supervision assessment. No verified subject ranking for this specific research area was found. More relevant evidence is the applied-biotechnology research theme, its named bioleaching team and an Innovate UK Knowledge Transfer Partnership with the same industrial partner towards pilot activity. That supports a focused applied-research environment; it does not guarantee that this student has unrestricted access to a particular pilot installation.

MIBTP describes a four-year programme in its FAQ. Its detailed training outline is headed 2025, so it supports the model rather than a confirmed 2027 calendar. It includes programming, statistics and bioinformation, twelve masterclass days, development planning and a three-month first-year research project at another partner university. Coventry's CASE guidance separately describes an industry placement of 3–18 months, potentially accumulated in shorter periods. Confirm the actual placement duration, location and how it fits the thesis; the network's maximum is not this student's assigned absence. Do not automatically add a generic PIPS internship on top of CASE industrial training.

Coventry's standard PhD description gives normal full-time study of 36 months, with a 48-month maximum. This general rule requires explanation alongside the bespoke four-year MIBTP training model and the personal award. It does not establish that this project funds only three years. Exact registration milestones, taught-credit obligations, thesis format, permitted extensions and completion charges remain to be confirmed in the offer. The programme and university provide different layers of training and regulation; the laboratory's research questions are a third layer.

Supervisors, Collaboration and Recent Original Papers

The official project names Dr Fatemeh Pourhossein Alamdari as primary supervisor and Professor Sebastien Farnaud, Stephen Hall and Dr Ebrahim Azimi as secondary supervisors, the latter two at Advanced Alloy Services. The current institutional profile lists Pourhossein Alamdari as an Assistant Professor in applied science/biotechnology, with sustainable bioprocesses, critical-material recovery and circular-economy research. Her current official rank should take priority over a generic Professor label. The project contact is ae3197@coventry.ac.uk.

Farnaud's profile describes his bioleaching research group and industrial translation. The university research theme records an existing AAS partnership, while the first paper below includes Hall and industry-provided residue materials. This is a concrete connection between the proposed research and industrial feedstocks. Actual access, staff availability, intellectual-property arrangements and publication approval remain offer-stage questions. The project has not published a named student's dedicated equipment inventory or a guaranteed route from laboratory work to commercial deployment.

The primary supervisor's published guidance describes hands-on initial training and support from experienced researchers. It expects at least weekly face-to-face meetings and weekly updates, with flexible hours apart from scheduled meetings; replies outside working hours are not expected. Written work of up to 5,000 words needs at least one week's notice for feedback. These are advertised working expectations, not an independent assessment of supervision quality. Clarify responsibility for biological training, analytical interpretation and industry supervision during placements.

Constantin, Hall, Pourhossein and Farnaud (2025): industrial superalloy residues

Constantin, Hall, Pourhossein and Farnaud, Processes 13(7):2157, 2025; DOI 10.3390/pr13072157. The original superalloy study compares three industrial residue types using material characterisation and biologically generated reagents. Its selected results show feed-dependent nickel/cobalt mobilisation and complications from iron competition, passivation and secondary phases. Initial material characterisation found tantalum, tungsten and hafnium in the residue after aqua-regia digestion. This is evidence of refractory constituents, not a measured tantalum recovery result from bioleaching. Pourhossein is a coauthor, while Constantin and Farnaud are corresponding authors; Hall provides the AAS connection. This is direct industrial-feed experience, but nickel/cobalt dissolution cannot be reported as a tantalum recovery result. Nor does the paper establish a complete lifecycle advantage. Reading: the original assessment covered selected main-text methods, results sections 3.1–3.5, discussion and conclusion on the rendered publisher page; not all supplementary material.

Baniasadi and colleagues (2025): dissolved metal versus recovered product

Baniasadi and colleagues, Journal of Environmental Management 395:127891, 2025; DOI 10.1016/j.jenvman.2025.127891. Pourhossein and Farnaud coauthor the study on integrated lithium-ion battery recycling. The primary abstract connects leaching with electrowinning and precipitation, helping frame the distinction between dissolved metal and a recovered product. Its reported recovery percentages refer to the solubilised fraction, so they cannot be applied to all starting black mass. The feed and metals also differ from this tantalum project. Reading: complete institutional abstract and metadata only. Detailed methods and result tables were not examined.

Constantin, Pourhossein, Ray and Farnaud (2024): feed and community context

Constantin, Pourhossein, Ray and Farnaud, Journal of Environmental Management 365:121521, 2024; DOI 10.1016/j.jenvman.2024.121521. The original indium/LCD study reports comparisons involving microbial-community adaptation and feed physical form. It supports asking how community behaviour and substrate differences affect recovery, without proving the proposed tantalum selectivity. Reading: complete institutional abstract and metadata only. The discussion here is limited to what those primary abstracts establish.

Together these papers demonstrate a relevant active collaboration and different stages of metal recovery. Only the first received selected main-text examination here. The two remaining full-text gaps limit independent assessment of detailed controls, repeatability and downstream performance. Ask the team for accessible manuscripts and discuss the actual evidence before treating a published headline yield as a transferable project result.

Funding, Dates and Living Costs

The published Coventry call lists 12 October 2026 as the opening date, 23 November 2026 as the deadline and October 2027 as the entry period. The closing time and time zone were not stated, and current acceptance is unconfirmed. The host explicitly covers the difference between UK-rate and overseas tuition for successful MIBTP awardees. The shared application guidance permits international students to comprise up to 30% of the programme cohort. This is a cohort constraint; it is not an individual admission probability or a separately guaranteed award for every listed project. The CASE list also has a network award total, not that many places for this particular topic.

The published £21,805 annual maintenance figure applies to 2026–27. The UKRI guidance and host account support that dated benchmark; the 2027–28 rate and the personal award's payment months remain unconfirmed. Training, consumables, conference support and laptop use are additional programme provisions, not all personal cash. Obtain the personal fee-waiver, maintenance and completion terms rather than translating the four-year programme description into an unconditional individual payment promise.

The university's 2026–27 accommodation table offers a useful local reference: a postgraduate Bishop Gate en-suite is £162 weekly for 50 weeks, £8,100 total, including listed household bills and insurance. A fifty-week contract leaves a year-round housing question. An advance licence payment is credited towards final rent; international students may need a first instalment before arrival. These are dated accommodation terms, not a 2027 quotation.

An illustrative analyst budget of £1,200–1,600 monthly, or £14,400–19,200 annually, leaves £2,605–7,405 against the older stipend benchmark before excluded upfront costs. This is a planning range, not measured student expenditure, guaranteed savings or a family budget. Housing choice, bills, commuting and periods at another university or industry site can change the result. October 2026 Student visa fee references are £558; the student immigration health surcharge is £776 per visa year. Relocation, visa/IHS, deposits and dependants are outside that illustration. Placement travel and temporary accommodation require explicit reimbursement terms.

Entry Requirements and the Mainland-China Route

Coventry's MIBTP page requires a relevant 2:1 first degree, with a 60% project element or equivalent and 60% overall module average. Its doctoral entry policy can consider a relevant Master's for a lower first degree if both overall performance and dissertation meet merit/60%. The broader MIBTP first/high-2:1 rules and exceptional routes do not override host assessment. Equivalence of an overseas degree, its research component and any exception must be established individually.

MIBTP explicitly considers foreign qualifications and offers international awards; Coventry explicitly funds the overseas fee gap. The international entry page includes China and directs research applicants to the doctoral criteria. Together with the research-specific English/CAS pathway, this provides positive institutional evidence of a mainland-China application route. It supports eligibility in principle rather than a guarantee for a particular Chinese degree. The general China postgraduate table's 70% figure is not a verified universal PhD threshold, and its lower generic English example must not replace this host's research rule.

For Coventry MIBTP, the published threshold is IELTS 7.0 overall with 6.5 in every component, or TOEFL iBT 95 overall with no component below 21. The doctoral policy requires an approved English test to have been attained or booked at application, with qualifications normally within the two years before entry. A generic MIBTP FAQ allowing later English evidence does not establish permission to ignore Coventry's booking requirement. Verify the accepted test, individual exemptions and the 2027 centre conditions directly.

The research is relevant to microbiology, biotechnology, environmental biotechnology, chemical/process engineering and materials-recovery backgrounds. The advertised outline does not establish a separate mandatory prior tantalum publication or instrument certificate. Explaining previous research, interpreting characterisation and distinguishing concentration from recovery are sensible preparation suggestions. A candidate seeking only theoretical modelling or product design should clarify the substantial biological and industrial-material component. These are research-fit observations, not new selection requirements.

Apply through the exact Coventry PGR+ opportunity, explicitly identify CASE and the full title, and complete MIBTP's ED&I form. Do not substitute Warwick's MIBTP course route. The public page confirms the opportunity but the account-only upload checklist was not read: confirm CV, statement/proposal, transcripts and references with Coventry rather than inventing mandatory formats. Contact the supervisor about the science and the host's MIBTP administrator about the portal and evidence conditions. Under ATAS nationality rules, China is not exempt; whether this particular course requires clearance must still be confirmed from its course classification. Admission, funding, any clearance, CAS and visa remain separate decisions.

Career relevance

Metal characterisation, bioprocess interpretation and industrial evidence assessment connect to recycling research, environmental biotechnology and process-development careers. The industrial partner's technology account corroborates a real high-temperature-alloy recycling business, not a commitment to hire the student.

Decision and Questions to Resolve

The project combines a competitive international funding route, a specific university–industry collaboration and a scientifically difficult critical-material problem. Its practical strength is the connection to industrial residues and a team with related recovery publications. Coventry's overall reputation is more limited than that of highly ranked research universities, and the new tantalum routes have not been demonstrated by the publications examined here. The two incomplete full-text readings also limit detailed assessment.

Before applying, obtain an individual degree-equivalence decision and confirm the English evidence or booking. Ask Coventry for the portal checklist, reference arrangements, deadline clock time and any CASE-specific selection dates. The public call establishes 23 November and October 2027 entry, but not a personal award. Confirm that the advertised tantalum topic remains available during award allocation. Use the official Coventry route and complete ED&I. Application guidance; public project entry.

At interview, distinguish the two recovery concepts, ask what industrial feed and preliminary characterisation already exist, and discuss what constitutes meaningful tantalum retention, purity and recovery. Ask for accessible versions of the two papers, the evidence supporting the proposed selectivity and a viable thesis direction if neither route reaches the intended performance. Clarify biological and analytical supervision, equipment/pilot access and the responsibilities of Hall and Azimi.

Before accepting, request the 2027 stipend, personal funded months and full overseas-fee terms in writing. Resolve the four-year MIBTP versus standard PhD-period wording, progression reviews and completion charges. Agree the actual industry placement, any partner-university stay, housing/travel reimbursement, intellectual property and publication conditions. Check ATAS/CAS and a year-round budget. Published supervision expectations and an industrial partnership are useful starting evidence; neither settles these personal offer conditions.

Evidence and Sources

Current acceptance of the topic is unconfirmed. The three studies have unequal reading scopes: selected publisher main-text sections for the superalloy study and complete institutional abstracts/metadata for the other two. Published 2026–27 costs and stipend are dated references, not personal 2027 terms. No cited study reports a new tantalum-recovery result for this project.

Project, School and Doctoral Training

• Official Pourhossein Alamdari CASE project and supervision
• Exact Coventry PGR+ tantalum studentship public entry
• MIBTP 2027 industrial CASE opportunities
• MIBTP training outline (headed 2025)
• MIBTP applicant FAQ
• Coventry doctoral degree and standard study periods
• QS 2027 Coventry overall ranking
• Coventry official university location

Team, Original Papers and Industry

• Pourhossein Alamdari official academic profile
• Sebastien Farnaud official academic profile
• Coventry applied science biotechnology and AAS KTP
• Advanced Alloy Services new technology and recycling
• Constantin et al. 2025 Ni/Co mobilisation from superalloy residues
• Baniasadi et al. 2025 integrated LIB metal recovery
• Constantin et al. 2024 microbial adaptation and indium
• UK Vision 2035 critical-minerals strategy
• UK critical-minerals technical annex

Funding, Costs and International Entry

• Coventry MIBTP 2027 call, CASE route and overseas fees
• MIBTP 2027 application and institution-specific overseas support
• Coventry doctoral research entry and English
• Coventry international entry and China guidance
• Coventry accommodation fees 2026–27 detailed table
• UK Student visa official route
• UK immigration health surcharge
• ATAS current nationalities and subject rules
• UKRI training grant current stipend