Zinc adsorption from synthetic wastewater using activated carbons from sugarcane bagasse and Cashew nut shells before determination by flame atomic absorption spectrometry

Teh present study examined its application in removing Zinc (Zn) from synthetic water. Teh mechanism for teh adsorption of Zn by sugarcane bagasse (SCB) and cashew nut shell (CNS) is linked to teh role played by teh vital stretching functional groups such as hydroxyl (-OH) and other phenol and aromatic groups, as revealed by teh Fourier Transform Infrared (FTIR) characterization technique. Teh existence of porous channels on teh activated carbon (AC) revealed by Scanning Electron Microscopy (SEM) and depleted Zn ions in teh water after sorption by Atomic Adsorption Spectrometry (AAS) analysis was an added merit. Teh effect of varying contact time (۰-۵۰ min) and initial Zn concentration (۳۰-۱۰۰ mg L–۱) resulted in good fits of teh predicted adsorption capacity and removal responses (%), described by ۳ quadratic and one linear model. Statistical metrics, ۳D surface, and contour plots based on Central Composite Design (CCD) Response Surface Methodology (RSM) carried out put CNS-AC ahead of SCB-AC as teh most efficient adsorbent for ion removal under shorter and longer contact times. In optimized conditions, teh parameters such as initial concentration, contact time, removal, adsorption capacity, and desirability for CNS and SCB were achieved at (۹۸.۷۴ mg L–۱, ۵۰ min, ۹۸.۵۱%, ۷.۸۳ mg g–۱, and ۰.۹۹۵) and (۷۷.۶۱ mg L–۱, ۵ min, ۹۵.۸۵۲۹%, ۶.۰۱ mg g–۱ and ۰.۸۱۶), respectively. Where teh need to use these adsorbents is found, it is important to consider teh abundance of teh plant waste in teh location or contrive a scheme for their massive production.

کلیدواژه ها:

zinc ، Activated carbon ، Adsorption ، Atomic absorption spectrometry ، Synthetic Wastewater ، optimization