PhD in Chemical Engineering at Bath: Sustainable Photocatalytic Treatment of Persistent Pollutants in Water

PhD in Chemical Engineering at Bath: Sustainable Photocatalytic Treatment of Persistent Pollutants in Water

Quick Decision

Removing a pollutant from a water sample does not establish that it has been destroyed, or that the resulting treatment is environmentally preferable. This Bath doctorate investigates that gap through computational modelling supported by targeted experiments, with particular attention to PFAS, transformation products and the performance of materials within treatment processes. It connects reaction engineering to environmental and economic assessment. Catalyst synthesis alone would cover only part of that scope.

The opportunity has a strong basis for applicants interested in computational water-treatment research, subject to confirming the research fit. Antonio Jose Exposito has directly relevant water-treatment research, and the saved Engineering and Design URSA terms describe tuition, maintenance and annual training support for Home and Overseas students. Awards are competitive, with an unspecified international cap, not an allocated personal award. The project notice lists 29 November 2026 without a time; the saved URSA policy states 23:59 UK time (GMT). Whether applications are currently being accepted has not been verified. An expected 4 October 2027 start can change by agreement. Personal funded months and the 2027/28 stipend remain unknown. Non-UK applicants not currently studying in the UK must satisfy English before the deadline, without exceptions. Engineering URSA terms

The most useful first enquiry to ajes22@bath.ac.uk is which pollutant, model and validation dataset will anchor the thesis. A broad promise to optimise photocatalysis needs a bounded starting problem, analytical support and clear supervision responsibilities. An award letter is not needed to make an enquiry; current application status is unverified.

Research Problem and Doctoral Work

Destruction, Transformation and Process Performance

The advertisement includes PFAS, pharmaceuticals, pesticides and other emerging contaminants, while giving PFAS particular emphasis. Their shared environmental persistence does not make their reaction pathways interchangeable. A model validated on one pharmaceutical cannot be assumed to predict fluorinated-compound destruction. The research must connect catalyst behaviour, reaction kinetics and transformation pathways to treatment performance, including the formation and fate of intermediate compounds.

Several endpoints matter. Adsorption transfers a compound onto a solid; disappearance of the measured parent molecule can also reflect transformation into other products. Neither establishes complete mineralisation, fluorine removal from organic molecules, or reduced toxicity. The project expressly seeks to minimise undesirable by-products, which is a research objective rather than a verified safety outcome. Identifying what measurements can support each endpoint is therefore central to the modelling question.

The planned work is primarily computational. Targeted laboratory experiments should validate selected findings and supply model-development data. The advertisement does not assign a particular simulator, atomistic method, kinetic mechanism, catalyst composition or reactor geometry. It would be premature to label it a fixed DFT, molecular-dynamics or CFD project. Clarify whether the initial emphasis is reaction-network inference, transport and reactor modelling, or comparison of process configurations, and how those levels will exchange information.

What a Useful Doctoral Contribution Could Establish

A plausible contribution is a model that distinguishes intrinsic reaction effects from transport or light-access limitations, quantifies uncertainty and is checked against independent observations. This is one possible contribution consistent with the advertised aims; the initial model and validation plan remain to be agreed. A good fit to one concentration curve may leave several mechanisms plausible; predictions outside the calibration conditions need a separate evidential basis. Missing product measurements cannot be supplied by model precision alone.

The source of each model parameter also matters: existing data may support some parameters, while targeted validation must establish others. If observations cover only the parent compound, conclusions about intermediate products remain limited. Matching the model question to the available measurements helps define a manageable thesis before choosing software.

The proposed environmental and economic indicators include energy demand, material requirements and catalyst utilisation. These make the system boundary important: light generation, auxiliary electricity, catalyst production, recovery or regeneration, replacement and residual-stream management may affect comparisons. The advertisement leaves the assessment framework open and provides no calculated life-cycle advantage. Any comparison must state which stages it includes: a gain in removal at one stage may be outweighed by material production, recovery or subsequent disposal. Reporting a removal percentage without its treatment burden would give an incomplete engineering comparison.

The team's recent studies below illustrate why the distinctions matter. A structured PFOA adsorbent makes handling and reuse relevant; a visible-light pharmaceutical study informs catalyst–reaction relationships; microplastic electrocoagulation connects material properties, separation mechanisms and process inputs. They support relevant expertise across treatment scales but do not collectively prove a scalable PFAS photocatalytic system. The project's potential lies in connecting evidence across those boundaries without treating unrelated pollutants as interchangeable validation cases.

The saved Drinking Water Inspectorate guidance describes expanded monitoring and risk assessment for PFAS in England and Wales, including a sum-of-48 guidance value. This supplies a concrete water-management context, not an endorsement of this catalyst or a statutory limit for every jurisdiction. Research skills in reaction modelling, analytical interpretation and environmental assessment are relevant to water utilities, technology development, consulting and academic research. Specific vacancies, graduate salaries and project placement outcomes were not verified. DWI monitoring and treatment context

School, Programme and Field Context

The University of Bath awards and registers the Chemical Engineering PhD, within its Faculty of Engineering and Design at Claverton Down. This is not Chemistry, Electronic and Electrical Engineering or an employment contract. Normal full-time completion is four years, with a two-year minimum and normally four-year maximum. Probationary registration leads to confirmation through written work and an oral assessment, followed by the thesis and viva. Centre affiliation is agreed on acceptance; it does not imply a second university awards the degree. Chemical Engineering doctorate

The departmental environment spans catalysis, materials and separation/process engineering. IMPS explicitly includes photocatalysis, adsorption, structured materials and characterisation, and lists Exposito among its team. These are relevant institutional strengths; a centre's equipment and other academics are not automatically reserved resources or co-supervisors for this project. The available analytical instruments, computing allocation, technician time and training access remain project-specific questions. Departmental research, IMPS expertise

Bath is 125th in QS World University Rankings 2027, compared with 132 in 2026. Its institutional PGR account reports 92% world-leading or internationally excellent research in REF 2021. Neither is a chemical-engineering, photocatalysis or individual-lab ranking. A pertinent subject ranking, group completion statistics and doctoral graduate destinations remain unestablished. The overall ranking supplies institutional context; the value of this doctorate depends on the research, training and resources available for this project. MyDoctoralDevelopment offers research and transferable-skills support, but the individual training plan must connect computation, reaction engineering and laboratory interpretation. QS institutional table, University doctoral context, Doctoral development

Supervisor and Lab Assessment

Identity, Research Direction and Available Evidence

The institutional research profile identifies Antonio Jose Exposito, email ajes22@bath.ac.uk, ORCID 0000-0001-6448-1681, as a Senior Lecturer in Chemical Engineering. The departmental roster describes Antonio Jose Exposito Serrano as Lecturer in Environmental Engineering. The identity appears consistent, but the saved sources differ on title and subject/department wording; they do not establish whether this is a second appointment or a staff-list classification. Neither a promotion date nor a professorial title is established. Research profile, Departmental staff roster

His stated interests join catalyst design with reactor engineering and techno-economic viability. Listed affiliations include IMPS, CAER, IAAPS and the Institute of Sustainability and Climate Change. An EPSRC photocatalytic-water-treatment project runs from October 2024 to October 2026, while a British Council hybrid cavitation/photocatalysis collaboration runs from February 2026 to January 2028. These demonstrate related activity, not funding assigned to this 2027 student. Previous co-authors are not automatically co-supervisors. Meeting arrangements, modelling mentorship and responsibility for experimental validation remain unconfirmed.

Three Recent Original Studies and Their Limits

2024: PFOA Adsorption and Material Reuse

Martins, Zoumpouli, Yi, Exposito, Wenk and Mattia, 2024, “3D-printed indium oxide monoliths for PFAS removal”, Chemical Engineering Journal 497, 154366; DOI 10.1016/j.cej.2024.154366. The complete original institutional and publisher abstracts describe self-supported indium-oxide structures removing PFOA by adsorption in recirculating flow. They report 53% removal, increasing to 75% after thermal regeneration, and reuse over three cycles. These are study-specific adsorption results, not photodegradation or a new doctorate's performance target. Original PFOA study

Its relevance is the interaction of material structure, diffusion, flow and practical recovery. Regeneration also raises an energy and residual-fate question for system comparisons. The earlier assessment covered the complete original abstracts and publication metadata; it did not include the main results or supporting information. The associated Bath data record describes material-characterisation and adsorption datasets; their existence is verified, but the files were not reanalysed and access for this doctorate is not promised. Original dataset record

2026: Iopamidol Photocatalysis and Its Limits

Ashu Abey, Fernandes, Emanuelsson, Reis and Expósito, 2026, “Na/Cu-Doping Engineering of Carbon Nitride for High-Performance Visible-Light Degradation of Iopamidol”, Small Science 6(7), e70341; DOI 10.1002/smsc.70341. The original author abstract reports enhanced visible-light pharmaceutical degradation using modified carbon nitride with an oxidant-assisted system, reaching 82.3% parent-compound degradation under the tested conditions. This concerns iopamidol, not PFAS, and does not establish complete mineralisation or harmless transformation products. Original photocatalysis study

The earlier assessment covered the abstract, introduction and beginning of the methods, including the material-design rationale; substantive main-text results and conclusions were outside that reading scope. The study supports a link between material properties and photocatalytic behaviour, with Exposito as corresponding author. It cannot supply a validated PFAS mechanism, environmental energy advantage or large-scale performance estimate. Reaction conditions and real-water applicability would need their own evidence rather than transfer from a headline percentage.

2026: Microplastic Separation and Process Inputs

Mateo, Wenk, Chew and Exposito, 2026, “Electrocoagulation for Polystyrene and Polyethylene Microplastic Removal: Particle Size Effects, Mechanisms, and Floc Characterization”, ACS ES&T Water 6(8), 5132–5142; DOI 10.1021/acsestwater.6c00398. The earlier assessment covered substantive primary-indexed methods, selected results/discussion and conclusions, together with the complete original abstract; it did not cover the full main text or supporting information. The controlled study links polymer type and particle size to floc formation, removal behaviour and process inputs. Original electrocoagulation study

Its methods explicitly use synthetic suspensions above typical environmental concentrations to permit characterisation. That limits direct extrapolation to environmental waters. Capturing microplastics in flocs is a separation outcome, not molecular destruction, and electrocoagulation is not photocatalysis. The paper is useful adjacent evidence of the team's mechanism-to-process reasoning, not a third PFAS photocatalytic demonstration. Across all three originals, the important remaining gap is an integrated, validated model of the specific pollutants and treatment configurations selected for this thesis.

Funding, Application and Living Cost

International Competition and Duration

The saved Engineering and Design URSA information describes an October 2027 intake and lists a deadline of 29 November 2026 at 23:59 GMT. Whether applications are still being accepted has not been verified. The scheme supports Home or Overseas tuition, maintenance and up to £1,000 annual training support. The project states an international cap without a percentage. Its £21,805 maintenance figure is the 2026/27 reference, not a verified personal 2027/28 rate or allocation probability. Training money is not additional living income. Engineering URSA terms, UKRI studentship baseline

Engineering and Design support is generally up to 3.5 years. This does not establish 42 personal funded months, while normal four-year candidature may extend beyond support. Before accepting, obtain the actual stipend, indexation, fee period, continuation requirements and completion-stage arrangements. International students pay visa and IHS costs personally and attend in person. These unknown award details do not prevent initial contact or an eligible competitive application.

Application Route and Language Condition

Apply for Chemical Engineering PhD, naming Exposito. At most two projects may be selected: choose University of Bath URSA under Funding Your Studies, then enter the exact first project title and lead supervisor; for a second choice use Project 2 Title and the second-choice supervisor field. The expected start is 4 October 2027, with an alternative requiring supervisor and Doctoral College agreement. General programme application timing does not override the funding deadline.

The programme requires two references, at least one academic from the latest place of study, and a personal statement covering research motivation, prior research and career plans. Its 1,000-word proposal applies to applicants bringing their own idea, not automatically to this predefined project. A separate 500-word project summary was not established as compulsory. Confirm the remaining document requirements rather than inferring them from another studentship. Bath's application guide permits specified AI support but requires applicants to write their own application; the personal statement must reflect the applicant's research experience and motivation. Doctoral application guidance

For non-UK applicants not currently studying in the UK, English must be satisfied before the application deadline, with no exceptions. The Chemical Engineering baseline is IELTS 6.5 overall, each 6.0. TOEFL iBT/Home Edition taken before 21 January 2026 requires 90 overall, each 21; on or after that date it requires 4.5 overall, each 4.0. Evidence normally must fall within 24 months of course start. An approved English-taught degree can provide an exemption subject to the applicable sole-medium, timing and residence requirements; a Chinese institution's medium-of-instruction letter is not automatic approval or a deadline extension. English and exemption policy

Fees and a Realistic Budget

Published 2027/28 Engineering overseas research tuition is £31,350 annually, with Home fees awaiting UKRI confirmation and continuing fees potentially increasing by up to 8% per year. This is exposure if support is incomplete, not a second tuition charge when URSA covers the appropriate fee. Confirm any bench/training fee and support after maintenance ends. 2027/28 tuition

Bath's 2025/26 budget is historical: £405 weekly or £21,060 annually, including average rent of £230 weekly and a 51-week accommodation contract. Its total includes an off-campus utility line even in a halls-labelled scenario. If the actual contract includes those utilities, removing the £37 overlap gives £368 weekly before one-offs; this is a derived scenario, not an alternative official quote. Off-campus £750 monthly excludes bills. Allow for the remaining week, deposit and relocation; neither a 2027 quotation nor a stipend surplus is established. Historical postgraduate budget, Dated doctoral FAQ

October 2026 official references give £558 Student visa fees and student IHS of £776 per year, with actual validity and part-year rules determining the upfront total. These are dated references, not guaranteed 2027 charges. Chemical Engineering is ATAS-covered; China is not nationality-exempt, but the individual subject/offer and clearance decision govern. This is neither categorical ineligibility nor assured approval. Student visa, IHS, ATAS rules

Applicant Fit and Preparation

The project requires an achieved or expected UK first-class or 2:1 honours degree or international equivalent; a Master's is advantageous. The broader programme offers a relevant Merit-Master's alternative subject to project requirements, so it cannot be used automatically to waive the advertised condition. Exposito welcomes chemistry, chemical-engineering and environmental-engineering backgrounds. Modelling, reaction kinetics, data analysis and laboratory interpretation are useful preparation, not an advertised requirement to master every simulation method.

Applicants from under-represented groups are encouraged. If circumstances affected educational attainment, applicants may explain this in the application form; a short paragraph at the end of the personal statement is suggested. If an applicant states in the application that they have a disability, the Disability Service will contact them to discuss the support they need.

Chinese applicants have a positive institutional route through worldwide equivalent qualifications and Overseas-eligible URSA support. Bath's indexed country guidance includes a PGR route, but its directly displayed country page does not repeat that subsection. Taught-postgraduate 62–75% thresholds must not become a definitive PhD cutoff. Submit the actual degree, transcript and research background for Chemical Engineering assessment; neither a Master's nor an unspecified university tier guarantees equivalence. International qualifications

A useful preparation example would explain a kinetic model, parameter uncertainty, an independent validation comparison and the difference between removal and destruction. This is suggested evidence of reasoning, not a required research proposal or laboratory recipe. Applicants seeking a purely experimental synthesis project should clarify the balance: computation leads, while validation is targeted. Likewise, an interest solely in atomistic electronic structure may be too narrow unless it connects to the chosen process-level question.

Next Actions and Questions to Verify

Before Applying

Contact Exposito about the first pollutant/model, supervision capacity, computational–experimental division and required documents. Obtain a current Chinese-equivalence decision and accepted English/exemption evidence before the hard funding deadline. Check both project-choice fields and the URSA selection carefully.

At Interview

Ask what data distinguish adsorption, transformation and destruction; how intermediate fate and uncertainty will be assessed; and which modelling and analytical resources are available. Establish validation independence, real-water relevance, the economic/environmental boundary and practical guidance responsibilities.

Before Accepting

Obtain personal 2027 award amounts, funded months, tuition/indexation and completion-cost terms in writing. Confirm accommodation, relocation, ATAS/CAS timing, visa/IHS costs and any bench-fee exposure. The saved materials describe the international competition and its fixed deadline, but current application status and later availability have not been verified. The individual financial package and bounded research plan still need to be made concrete.

Evidence and Sources

Supervisor and Original Research

• Exact project notice (FindAPhD)
• Antonio Jose Exposito official institutional profile
• Chemical Engineering current academic staff
• Martins et al. 2024: 3D-printed indium oxide monoliths for PFAS removal
• Ashu Abey et al. 2026: Na/Cu-doped carbon nitride and iopamidol
• Mateo et al. 2026: microplastic electrocoagulation mechanisms
• Original dataset record for indium oxide PFAS-removal research

Institution, Programme and Field

• Bath Chemical Engineering PhD programme
• DWI current PFAS monitoring and water-treatment context
• IMPS interdisciplinary team and materials/process expertise
• Bath Chemical Engineering research environment
• Bath doctoral professional development
• QS Bath overall 2027 table
• Bath postgraduate research school context

Funding, Application and Costs

• University Research Studentship Award policy and 2027 Engineering deadline
• Bath doctoral English rules
• Bath Chinese research-degree qualification route
• Bath Engineering research tuition 2027/28
• Bath postgraduate budget 2025/26
• Bath doctoral admissions FAQ 2026/27
• UKRI training grant current stipend
• UK Student visa official route
• UK immigration health surcharge
• ATAS current nationalities and subject rules
• Bath doctoral application guide and application-authorship policy