Kovo Abdulsalami Sanni, Alaya-Ibrahim Sherifat, Abdulkareem Ambali Saka, Adeniyi Olalekan David, Egbosiuba Titus Chinedu, Tijani Jimoh Oladejo, Saheed Mustapha, Okafor Blessing Onyinye, Adeyinka Yusuff Sikiru
Chemical Engineering Department, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria.
Nanotechnology Research Group, African Centre for Excellence on Mycotoxin, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria.
Heliyon. 2023 Jan 24;9(2):e13095. doi: 10.1016/j.heliyon.2023.e13095. eCollection 2023 Feb.
Herein, magnetite nanoparticles (NPs), zeolite A and magnetite-zeolite A (MAGZA) composite was developed by green methods. The produced nanomaterials were characterized and the effect of process parameters such as flow rate, adsorbent bed height and adsorbate inlet concentration was evaluated for the removal of biological oxygen demand (BOD), chemical oxygen demand (COD) and total organic carbon (TOC) in a column. The characterization results demonstrated the successful synthesis of magnetite NPs, zeolite A and MAGZA composite. The performance of the MAGZA composite in the fixed-bed column was superior to zeolite A and magnetite NPs. The parametric influence indicates that an increase in bed height and a decrease in the flow rate and inlet adsorbate concentration improved the performance of the adsorption column. The adsorption column demonstrated maximum performance at a flow rate (4 mL/min), bed height (5 cm) and inlet adsorbate concentration (10 mg/L). Under these conditions, the highest percent removal of BOD, COD and TOC were 99.96, 99.88 and 99.87%. Thomas and Yoon-Nelson's model suitably fitted the breakthrough curves. After five reusability cycles, the MAGZA composite demonstrated removal percent of BOD (76.5%), COD (55.5%) and TOC (64.2%). The produced MAGZA composite effectively removed BOD, COD and TOC from textile wastewater in a continuous operating mode.
在此，通过绿色方法制备了磁铁矿纳米颗粒（NPs）、A型沸石以及磁铁矿-沸石A（MAGZA）复合材料。对所制备的纳米材料进行了表征，并评估了流速、吸附剂床层高度和吸附质入口浓度等工艺参数对柱中生物需氧量（BOD）、化学需氧量（COD）和总有机碳（TOC）去除效果的影响。表征结果表明成功合成了磁铁矿纳米颗粒、A型沸石和MAGZA复合材料。MAGZA复合材料在固定床柱中的性能优于A型沸石和磁铁矿纳米颗粒。参数影响表明，床层高度的增加、流速和入口吸附质浓度的降低可提高吸附柱的性能。吸附柱在流速为4 mL/min、床层高度为5 cm和入口吸附质浓度为10 mg/L时表现出最佳性能。在此条件下，BOD、COD和TOC的最高去除率分别为99.96%、99.88%和99.87%。托马斯模型和尹-尼尔森模型能很好地拟合穿透曲线。经过五次重复使用循环后，MAGZA复合材料对BOD、COD和TOC的去除率分别为76.5%、55.5%和64.2%。所制备的MAGZA复合材料在连续运行模式下能有效去除纺织废水中的BOD、COD和TOC。
