Shihad, A. A. A. (2026). VALORIZATION OF SPENT (CAROTENOID-EXTRACTED) GREEN-MICROALGAL BIOMASS INTO BIOCHAR FOR SIMULTANEOUS REMOVAL OF BRICK-KILN-ASSOCIATED METALS (PB, NI, CD, FE) FROM IMPACTED WATER: RSM OPTIMIZATION, ISOTHERMS, AND REUSABILITY. Journal of Modern Techniques in Biology and Allied Sciences, 3(2), 48-60. https://doi.org/10.70604/jmtbas.v3i2.201