Tuersun Nuremanguli, Wang Yingjie, Aihemaiti Aikelaimu, Wang Jing, Huang Chuanjing
Xinjiang Biological Solid Waste Recycling Engineering Technology Research Center, College of Chemistry and Environmental Sciences, Kashi University, Kashi 844000, China.
Xinjiang Key Laboratory of Novel Functional Materials Chemistry, College of Chemistry and Environmental Sciences, Kashi University, Kashi 844000, PR China.
ACS Omega. 2024 Apr 12;9(16):17989-18000. doi: 10.1021/acsomega.3c09501. eCollection 2024 Apr 23.
In this study, a single factor exploration method was adopted to optimize the cotton shell-based activated carbon adsorption reaction time, temperature, pH value, initial concentration of cadmium ion, and other conditions. The experimental results showed that under the conditions of Cd solution pH = 8, initial concentration of 100 mg/L, adsorption reaction time of 180 min, adsorption temperature of 45 °C, cotton shell-based activated carbon dosage of about 0.1 g, the removal rate of Cd was 94.03%, the adsorption capacity was 51.95 mg/g, and the error was only 0.05%. The adsorption kinetic analysis of this study conforms to the quasi-second-order kinetic model, the adsorption isotherm analysis conforms to the Langmuir adsorption isothermal model, and the Gibbs free energy of the adsorption process is negative; the above simulation analysis also proves the spontaneity and feasibility of the adsorption process.
本研究采用单因素探索法对棉壳基活性炭吸附反应时间、温度、pH值、镉离子初始浓度等条件进行优化。实验结果表明，在Cd溶液pH = 8、初始浓度为100 mg/L、吸附反应时间为180 min、吸附温度为45℃、棉壳基活性炭投加量约为0.1 g的条件下，Cd的去除率为94.03%，吸附容量为51.95 mg/g，误差仅为0.05%。本研究的吸附动力学分析符合准二级动力学模型，吸附等温线分析符合朗缪尔吸附等温模型，且吸附过程的吉布斯自由能为负值；上述模拟分析也证明了吸附过程的自发性和可行性。
