Two-stage sustainable approach for tin recovery from waste PCBs using Acidithiobacillus ferrooxidans leaching and bentonite clay adsorption. IJCT [Internet]. 2025 Aug. 8 [cited 2026 May 15];32(4):454-65. Available from: https://or.niscpr.res.in/index.php/IJCT/article/view/16245