Kumar Manikant, Maurya N S, Singh Anshuman, Rai M K
Department of Leather Technology, Muzaffarpur Institute of Technology, Muzaffarpur, Bihar, 842003, India.
Department of Civil Engineering, National Institute of Technology, Patna, Bihar, 800005, India.
Heliyon. 2023 Mar 29;9(4):e15038. doi: 10.1016/j.heliyon.2023.e15038. eCollection 2023 Apr.
The current study is focused on using tannery waste called buffing dust to remove hexavalent chromium from an aqueous solution. The buffing dust was characterised by using different technique like FTIR, SEM, and BET analysis. The adsorption experiment was conducted in batch mode. The different operating factors including contact time, dose and initial Cr (VI) concentration were investigated. The optimum adsorption capacity was observed at contact time of 240 min and dose of 1g/100 mL. The adsorption isotherm such as Langmuir, Freundlich and Temkin were investigated at different initial concentration. It was observed that Langmuir isotherm model was best fitted for present study with maximum adsorption efficiency of 11.33 mg/g. The kinetic study was performed for pseudo first order and pseudo second order and it was found that pseudo second order model was provided the best match with regression coefficient (R) of 0.9991.
当前的研究聚焦于使用一种名为抛光粉尘的制革废料来去除水溶液中的六价铬。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和比表面积分析仪（BET）分析等不同技术对抛光粉尘进行了表征。吸附实验以分批模式进行。研究了包括接触时间、剂量和初始铬（VI）浓度在内的不同操作因素。在接触时间为240分钟、剂量为1克/100毫升时观察到了最佳吸附容量。在不同初始浓度下研究了诸如朗缪尔等温线、弗伦德里希等温线和坦金等温线等吸附等温线。结果表明，朗缪尔等温线模型最适合本研究，最大吸附效率为11.33毫克/克。对拟一级动力学和拟二级动力学进行了研究，发现拟二级动力学模型与回归系数（R）为0.9991的情况最匹配。
