Highly efficient adsorption of dyes by biochar derived from pigments-extracted macroalgae pyrolyzed at different temperature

•Macroalgae residue is promising raw material for producing biochar.•Biochar derived from pigments-extracted macroalgae is a promising adsorbent.•The malachite green adsorption capacity of MDBC800 is 5306.2 mg/g. Biochar is known to efficiently adsorb dyes from wastewater. In this study, biochar was...

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