Synthesis, characterization, and performance investigation of biochar - Derived from date palm trunk waste for anionic dye adsorption from synthetic wastewater

• Main Authors: Al-Rubaye, Mohammed F., Al-Ani, Faris H., AL-Obaidy, Abdul Hameed M. J.
• Format: Conference Proceeding
• Language: English
• Subjects: Adsorption; Biomass; Dyes; Heat treatment; Multilayers; Surface area; Thermal decomposition; Water resources; Water treatment
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0254277

Water resources are a carrier of many pollutants that considerably influence their quality; one of them is the synthetic dyes, which are industrial process products. The present study was conducted considering the increased application of biochar, a solid material applied in water treatment, obtained as a result of the thermal decomposition of different biomass. Thus, the present research work was taken up using pristine and NaOH-pretreated biochar prepared from the biomass of date palm trunk waste for the removal of an anionic dye from aqua medium. The FTIR spectroscopy and SEM results also displayed the change in surface area that happened due to the NaOH modification of biochar. The surface area of T-DPTBC increased to 101.67 m2·g−1 with respect to the untreated biochar, of which this value was 4.1 m2.g-1. T-DPTBC had honeycomb-like microporous structure with average pore diameter of 6.51 nm. Batch experiments were performed to find out adsorption performance for anionic dye Methyl Orange (MO). The maximum Mo adsorption capacity reached for T- DPTBC was 82.92 mg.g-1 at pH 3. Adsorption isotherm data showed best fit with the Freundlich model (R2 = 0.981) and therefore presented an adsorption process in multi-layers at the surface of biochar. The results of this study indicated that T- DPTBC is a sustainable adsorbent for the removal of dyes from water.