cellulose-supported ni/al layered double hydroxide (ldh) as unique adsorbents for malachite green dye removal in aqueous solutions

Ni/al-cellulose composites were successfully synthesized using the co-precipitation method. x-ray diffraction (xrd), fourier transform infrared (ft-ir) spectroscopy, scanning electron microscope (sem), and brunauer-emmett-teller (bet) were used to characterize the structure of materials. ni/al-cellulose was applied to the malachite green (mg) dye adsorption process to study adsorption and reusability performance. the surface area of ni/al material after composting with cellulose increased, from 3.288 to 5.096 m2/g. the optimum ph for mg was ph 7 and ph pzc > ph optimum. the equilibrium contact time is 150 minutes. the mg adsorption process in this experiment follows the langmuir isotherm and pseudo-second-order kinetic models. the adsorption process occurs through physisorption and chemisorption (physicochemical process) based on kinetic data, isotherm data, δg value, ph optimum ≠ ph pzc, and ft-ir results of adsorbent after mg adsorption. ni/al-cellulose has adsorption capacity and percent removal of 107.527 mg/g (71%). reusability studies show that ni/al-cellulose is more effective for reusable in the adsorption process of mg until the sixth cycle, with an adsorption capacity of 54%. thus, the synthesized nial/cellulose composites could potentially be used as an efficient adsorbent for mg adsorption in wastewater.