Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.
Department of Pharmaceutical Chemistry, College of Pharmacy, University of Anbar, Ramadi, Iraq.
Int J Biol Macromol. 2023 Jul 1;242(Pt 4):125086. doi: 10.1016/j.ijbiomac.2023.125086. Epub 2023 May 27.
In this study, a magnetic chitosan grafted-benzaldehyde (CS-BD/FeO) was hydrothermally prepared using benzaldehyde as a grafting agent to produce a promising adsorbent for the removal of acid red 88 (AR88) dye. The CS-BD/FeO was characterized by infrared spectroscopy, surface area analysis, scanning electron microscopy-energy dispersive X-ray, vibrating sample magnetometry, powder X-ray diffraction, CHN elemental analysis, and point of zero charge (pH). The Box-Behnken design (BBD) was adopted to study the role of variables that influence AR88 dye adsorption (A: CS-BD/FeO dose (0.02-0.1 g), B: pH (4-10), and time C: (10-90 min)). The ANOVA results of the BBD model indicated that the F-value for the AR88 removal was 22.19 %, with the corresponding p-value of 0.0002. The adsorption profiles at equilibrium and dynamic conditions reveal that the Temkin model and the pseudo-first-order kinetics model provide an adequate description of the isotherm results, where the maximum adsorption capacity (q) with the AR88 dye was 154.1 mg/g. Several mechanisms, including electrostatic attraction, n-π interaction, π-π interaction, and hydrogen bonding, regulate the adsorption of AR88 dyes onto the CS-BD/FeO surface. As a result, this research indicates that CS-BD/FeO can be utilized as an effective and promising bio-adsorbent for azo dye removal from contaminated wastewater.
在这项研究中，采用水热法制备了一种磁性壳聚糖接枝苯甲醛（CS-BD/FeO），以苯甲醛作为接枝剂，制备了一种有前途的用于去除酸性红 88（AR88）染料的吸附剂。通过红外光谱、比表面积分析、扫描电子显微镜-能谱、振动样品磁强计、粉末 X 射线衍射、CHN 元素分析和零电荷点（pH）对 CS-BD/FeO 进行了表征。采用 Box-Behnken 设计（BBD）研究了影响 AR88 染料吸附的变量（A：CS-BD/FeO 剂量（0.02-0.1 g），B：pH（4-10）和时间 C：（10-90 min））的作用。BBD 模型的 ANOVA 结果表明，AR88 去除的 F 值为 22.19%，相应的 p 值为 0.0002。平衡和动态条件下的吸附曲线表明，Temkin 模型和准一级动力学模型对吸附等温线结果提供了充分的描述，其中 AR88 染料的最大吸附容量（q）为 154.1 mg/g。几种机制，包括静电吸引、n-π 相互作用、π-π 相互作用和氢键，调节了 AR88 染料在 CS-BD/FeO 表面的吸附。因此，这项研究表明 CS-BD/FeO 可作为一种有效且有前途的生物吸附剂，用于从受污染废水中去除偶氮染料。
