Adsorption Study for Removal of Acid Orange Dye using Modified Nano Chitosan

Abstract

So far the application of chitosan as an adsorbent still uses microscale chitosan adsorbent. The microscale chitosan has not adsorbed waste maximally either to the weight of the adsorbent usage or the target adsorption capacity. Nanoscale adsorbent size has not been widely used, especially as an adsorbent of dyes waste. Therefore, through micro-size reconstruction into nano chitosan will provide maximum opportunities in its utilization. This study reconstructs the size of chitosan into nanochitosan and binds crosslinking with phosphate. Synthesis using ionic gelation method. The crosslinked results were characterized using FTIR, PSA and SEM-EDX instruments, followed by parameter optimization including pH optimization, interaction time, adsorption capacity and application. The amount of absorbed dye concentration was analyzed using UV-Vis spectrophotometer. The measurement results showed that the physical reconstruction of chitosan was successfully carried out with a wavelength range of 246nm-260nm as an indication of nanochitosan adsorbent at pH 7-9 using 5% nanochitosan. It was concluded that the nanochitosan from the synthesis could be reused for 2 times, with desorption percentage of 86%.

SEM evaluation to optimize the condition for the production of uniform chitosan nanoparticles from shrimp shells working as an effective adsorbent to acid red 1

“…Different kinetic models such as Lagergren's pseudo first order, Ho's pseudo second order and Weber-Morris intraparticle diffusion model were applied to the experimental results to describe the nature of adsorption kinetics. The linearized forms of these kinetic equations are expressed by equations ( 8), (9) and (10), respectively [26]:…”

“…𝑞 𝑡 = 𝑘 𝑖 𝑡 0.5 + 𝐶 𝑖 (10) where, qt and qe are the amount adsorbed (mg•g -1 ) at time t and equilibrium time, respectively, Ci is the initial concentration (mg•L -1 ), k1, k2 and ki are the rate constants of pseudo-first order model (g•mg -1 •min -1 ), pseudo-second order model (g•mg•g -1 ), and intraparticle diffusion model (mg•g -1 •min -0.5 ), respectively. Figures 9a-c show the different kinetic models which were fitted with the data obtained from the adsorption experiments performed at different contact time.…”

“…on the formulation of nanofibers [2], nano-membranes [3], and nanoparticles [4][5] from chitosan for using in pharmaceutical and biomedical formulations [5] due to their biocompatibility, biodegradability, and non-toxicity nature. Even NPs prepared from chitosan have applied for the delivery of antibiotics [6][7] and anti-cancer drugs [8][9] as well as for the removal of industrial effluents or dyes [10].…”