This study develops a sustainable magnetic adsorbent synthesized from a dual-biomass precursor of rice and sunflower husks for Chemical Oxygen Demand (COD) removal. To ensure industrial relevance, a replica wastewater was formulated by boiling log of wood in water. Although KOH and KMnO4 activation yielded varied textural properties, green-tea-mediated magnetization was selected as the optimal pathway (BET=331.47 m²/g). This choice prioritizes system reusability and magnetic recovery over raw surface area. RSM optimization (pH 5.0, 2.0 g/L dose) achieved 91.1% COD removal. NaOH-mediated desorption facilitated robust reusability, maintaining 85.6% regeneration efficiency over four cycles. The results establish a scalable and circular economy blueprint for industrial wastewater removal.

Ифеаньи-Нзэ Ф. (науч. рук. Семенова Т.С.) Sustainable remediation of wood industry wastewater via green-tea-magnetized dual-biomass adsorbents // Сборник тезисов докладов конгресса молодых ученых. Электронное издание. – СПб: Университет ИТМО, [2026]. URL: https://kmu.itmo.ru/digests/article/16498