TY - JOUR A2 - El-Chaghaby, Ghadir A. AU - Sabarudin, Akhmad AU - Madjid, Armeida D. R. PY - 2021 DA - 2021/02/17 TI - Preparation and Kinetic Studies of Cross-Linked Chitosan Beads Using Dual Crosslinkers of Tripolyphosphate and Epichlorohydrin for Adsorption of Methyl Orange SP - 6648457 VL - 2021 AB - Preparation of cross-linked chitosan beads using dual crosslinkers of tripolyphosphate (TPP) and epichlorohydrin (ECH) for the adsorption and kinetic studies of methyl orange (MO) had been carried out. FTIR spectra showed that TPP could act as the protecting agent of the NH₂壳聚糖组和ech与壳聚糖的初级羟基反应。研究了各种浓度的TPP，ECH和浸渍时间在TPP珠粒形成中。研究了pH和吸附动力学的影响，以确定吸附和限速步骤的机制。结果，选择pH 3,10％（w / v）TPP，5％（v / v）eqh和12h浸入TPP中的时间作为制备珠粒的最佳条件，如最高吸附量所示莫。在最佳条件下，MO的交联壳聚糖珠子的吸附能力为79.55mg / g，吸附速率常数（ K.）1.29×10^-3/分钟。此外，发现低浓度的ECH可以保持壳聚糖在酸性条件下的稳定性，而TPP的浓度和浸入时间控制的壳聚糖珠的孔径和形态。MO吸附机制由交联壳聚糖珠的孔和刚性控制。块状扩散充当速率限制步骤，并且高浓度的Mo抑制扩散和吸附本身。SN - 2356-6140 UR - https://doi.org/10.1155/2021/6648457 Do - 10.1155 / 2021/6648457 JF - 科学世界期刊PB - Hindawi KW - ER -