In the realm of environmental conservation, tackling dye pollutants in water reservoirs stands as a formidable challenge. To address this concern, researchers have engineered a groundbreaking solution: a novel biochar material, co-modified with KOH and chitosan (CHKBC).

In their study, the researchers synthesized CHKBC and meticulously assessed its morphology and physicochemical properties through various analyses, including SEM, FTIR, XPS, XRD, and thermogravimetric analyses. The results showcased a remarkable increase in chitosan loading on the biochar surface, attributed to the pretreatment with KOH.

The modified biochar exhibited enriched functional groups, including −COOH, −NH2, and −OH, leading to a substantial enhancement in methylene blue (MB) adsorption capacity. The adsorption efficiency soared from 8.83 mg g−1 to 62.04 mg g−1, marking a 7.03-fold increase. Remarkably, CHKBC maintained its exceptional performance across varying temperature and pHpH is a measure of how acidic or alkaline a substance is. A pH of 7 is neutral, while lower pH values indicate acidity and higher values indicate alkalinity. Biochars are normally alkaline and can influence soil pH, often increasing it, which can be beneficial More conditions.

The adsorption mechanisms elucidated a multi-faceted approach, encompassing ion exchange, pore filling, electrostatic attraction, π – π interactions, and hydrogen bonding. This multifunctional biochar not only boasts higher chitosan loading and uniform distribution but also offers superior MB adsorption efficiency, all at a low cost and through a simple production process.

The textile industry’s significant contribution to water pollution underscores the urgency of effective remediation strategies. Methylene blue, a prevalent dye, poses severe ecological and health risks, demanding urgent attention. While traditional methods fall short, adsorption emerges as a viable solution, with biochar showcasing immense potential.

Biochar’s versatility, coupled with chitosan’s adsorption capabilities, presents a synergistic approach to water purification. Through innovative modifications, CHKBC stands as a beacon of hope, offering a sustainable, cost-effective solution to mitigate dye pollution in water bodies. As research endeavors continue, the prospect of CHKBC scaling up for practical application holds promise for a cleaner, healthier environment.