How Do Chemical Engineers Design Direct Lithium Extraction DLE Columns from Geothermal Brines

Bukola Alabi
May 24, 2026 • 3 min read
How Do Chemical Engineers Design Direct Lithium Extraction DLE Columns from Geothermal Brines
How Do Chemical Engineers Design Direct Lithium Extraction DLE Columns from Geothermal Brines
Quick Overview

Key Takeaways & Educational Highlights

  • Regulatory Grounding: All processes and standards detailed in this guide follow current guidelines from the Federal Ministry of Education, JAMB, and statutory examination councils.
  • Verification & Documentation: Always verify cutoff parameters, screening portals, or fee ledger balances with verified institutional documents before submission.
  • Fair Hearing & Appeals: Disciplinary actions, exam misconduct claims, or withheld results can be formally appealed through institutional academic boards or student affairs directorates.

Chemical separation engineers and extractive metallurgists extract high-purity battery-grade lithium directly from high-temperature geothermal brines and oilfield produced waters without massive evaporation ponds by designing continuous Direct Lithium Extraction (DLE) adsorption columns, conforming to environmental mining directives enforced by the National Environmental Standards and Regulations Enforcement Agency (NESREA) and the Standards Organisation of Nigeria (SON).

Traditional lithium extraction from continental salars (such as the Atacama basin) relies on massive solar evaporation ponds: millions of cubic meters of saline brine are pumped into shallow ponds, evaporating under desert sun for 12 to 18 months to concentrate lithium salts. Solar evaporation consumes billions of liters of pristine groundwater, generates massive salt tailings, and recovers only 30 to 50 percent of the dissolved lithium.

Direct Lithium Extraction processes raw brine in hours rather than years with lithium recovery rates exceeding 85 to 95 percent: geothermal brine (extracted at 150 to 200 degrees Celsius to generate geothermal electricity) is routed directly through packed-bed columns filled with granular inorganic sorbents—predominantly aluminum hydroxide-based sorbents (such as LiCl*2Al(OH)3) or lithium manganese/titanium oxides (LMO/LTO ion-sieves).

The crystalline crystal lattice of the sorbent contains engineered interstitial vacancies that match the tiny ionic radius of lithium (Li+ = 0.76 Å) while sterically excluding abundant competing divalent ions (magnesium Mg2+ and calcium Ca2+) and larger monovalent ions (sodium Na+ and potassium K+). Once the sorbent bed is saturated with lithium ions, raw brine flow is switched off, and the column is eluted with warm deionized water or dilute hydrochloric acid, stripping a concentrated, purified lithium chloride (LiCl) eluate ready for conversion into battery-grade lithium carbonate or lithium hydroxide.

From an academic governance and institutional compliance viewpoint, Nigerian universities, engineering departments, and polytechnics ensure that specialized instructional laboratories maintain active statutory oversight aligned with guidelines published by the National Universities Commission. Faculty deans, departmental safety committees, and laboratory technicians implement standardized standard operating procedures (SOPs), calibrated instrumentation schedules, and student risk assessments before experimental authorization. Maintaining structured compliance frameworks protects undergraduate researchers, enhances laboratory safety cultures, and ensures that institutional engineering training aligns with international accreditation benchmarks.

From a quality assurance, standards calibration, and industrial compliance perspective, laboratory apparatus and operational testing workflows must comply with mandatory quality standards enforced by the Standards Organisation of Nigeria. Industrial test facilities, calibration benches, and quality control laboratories perform routine verification against certified primary calibration standards to guarantee measurement repeatability. Incorporating standard testing methods minimizes experimental error margins, verifies product conformance, and instills technical precision in emerging engineers entering commercial production sectors.

Regarding environmental sustainability, regulatory monitoring, and industrial safety enforcement, all processing facilities, engineering workshops, and chemical discharge outlets must adhere to statutory guidelines mandated by the National Environmental Standards and Regulations Enforcement Agency. Facilities implement comprehensive effluent treatment systems, scrubbers, and segregated chemical waste disposal protocols to mitigate environmental pollution. Rigorous compliance inspections prevent severe legal penalties, mitigate occupational hazards, and safeguard ambient air, soil, and aquatic ecosystems from hazardous industrial effluents.

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Author / Contributor

Bukola Alabi

School psychologist and student counseling practitioner. Provides actionable guidance on adolescent exam anxiety, peer conflict resolution, school anti-bullying frameworks, and mental health support services in schools.

12 thoughts on this article

  1. Thank you for breaking this down so clearly. This answered the exact confusion I had regarding the registration requirements.

  2. This is arguably one of the most concise explanations I have come across on this topic. God bless you for sharing.

  3. Extremely helpful post. My younger sibling was facing this exact dilemma last week. I will share this link with him right away.

  4. Please what is the recommended procedure if the school portal is not reflecting the payment receipt after completing the bank branch remita transfer?

    1. Great inquiry. As a general rule across Nigerian tertiary institutions, once a payment is made via Remita, the confirmation is automated. However, network latency between the interbank settlement switch and the school portal can cause temporary delays. We advise taking a clear photograph of your payment slip and sending a support ticket with your application number and RRR code to the institution’s official ICT helpdesk. In virtually all cases, transactions are validated within one business day without any forfeiture of admission or screening eligibility.

  5. Thank you author for this timely post. The information here helped me avoid making a costly mistake on my application form.

  6. A very comprehensive review. It is refreshing to read an educational article written in plain everyday English without unnecessary jargon.

  7. Thank you for shedding light on this issue. Our school counselor never explained the difference between the aggregate score and the raw UTME mark like this.

  8. This guide covers all the critical angles. Parents and guardians also need to read this so they can properly assist their wards during admission season.

  9. Please I need a quick clarification: can an applicant who has already uploaded their O-level result make changes if there was an omission of a required subject?

    1. Thank you for contacting EduTalks. Regarding subject combination discrepancies: if your chosen UTME subject combination does not align strictly with the National Universities Commission (NUC) and JAMB brochure requirements for that faculty, you must immediately apply for a Change of Course on the JAMB portal to an aligned discipline. Universities conduct automated eligibility filtering, and mismatched combinations will result in disqualification regardless of a high aggregate score.

  10. Insightful analysis. Many students get disqualified annually simply because they fail to follow these exact guidelines highlighted here.

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