Deenbandhu Chhotu Ram University of Science & Technology, Murthal, 131039, Sonipat, India.
Dr. S. S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh, India.
Environ Sci Pollut Res Int. 2022 Oct;29(48):72279-72293. doi: 10.1007/s11356-022-20580-9. Epub 2022 May 26.
The objective of this study deals with column optimization of adsorption-based on removal of arsenite ion using rice husk. The parameters affecting the column adsorption study, i.e., influent-concentration, bed depth, and flow rate, were optimized. The range of parameters, i.e., influent-concentration (15-50 mg/L), flow rate (20, 35, 45, and 60 mL/min), and bed depth (15-60 mm), were studied experimentally. Kinetics models Bohart-Adams and Hutchins were studied to measure the amount adsorbed, depth of mass transfer zone, saturated concentration, and time observed at 10% & 90% breakthrough. The percentage amount adsorbed q enhanced with enhancement in bed depth but got reduced with influent ions concentration and volumetric flow rate. Established model Bohart-Adams and Hutchins equations were used for calculation of mass transfer zone which came out to be 51 mm. An adsorption capacity (q) of 4.5 mg/g for arsenite ions was achieved at optimum parameter values of 60 mm of bed depth, 20 mL/min volumetric flow rate, and 50 mg/L of influent ions concentration. The adsorption bed parameters were also evaluated using Hutchins and Michaels equations. The column study proved rice husk to be a potential adsorbent for the adsorption of arsenite.
本研究的目的是优化基于稻壳的吸附柱，以去除亚砷酸盐离子。影响柱吸附研究的参数，如进水浓度、床层深度和流速，都进行了优化。参数范围，如进水浓度（15-50mg/L）、流速（20、35、45 和 60mL/min）和床层深度（15-60mm），进行了实验研究。动力学模型 Bohart-Adams 和 Hutchins 用于测量吸附量、传质区深度、饱和浓度和 10%和 90%穿透时的观察时间。吸附量 q 随着床层深度的增加而增加，但随着进水离子浓度和体积流速的增加而减少。建立的模型 Bohart-Adams 和 Hutchins 方程用于计算传质区，结果为 51mm。在最优参数值为 60mm 床层深度、20mL/min 体积流速和 50mg/L 进水离子浓度下，亚砷酸盐离子的吸附容量（q）达到 4.5mg/g。还使用 Hutchins 和 Michaels 方程评估了吸附床参数。柱研究证明稻壳是吸附亚砷酸盐的潜在吸附剂。
