Chand Piar, Bokare Mandar, Pakade Yogesh B
CSIR-Institute of Himalayan Bioresource Technology, Palampur, HP, 176061, India.
Cleaner Technology and Modelling Division (CTMD), CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, 440020, India.
Environ Sci Pollut Res Int. 2017 Apr;24(11):10454-10465. doi: 10.1007/s11356-017-8658-5. Epub 2017 Mar 9.
Polymerized apple pomace (PoAP) surface was evaluated as adsorbent for the removal of Pb, Cd, and Ni ions from aqueous solution. PoAP was characterized by FTIR, SEM, EDS, XRD, and BET surface area analyzer. Furthermore, the adsorption influencing parameters such as dose, pH, time, concentration, and temperature were optimized for maximum removal of metal ions from aqueous solution. The maximum monolayer adsorption capacity of PoAP was found to be 106, 34.12, and 19.45 mg g, for Pb, Cd, and Ni ions respectively, using the Langmuir isotherm model. The rate of adsorption was evaluated using pseudo-second order kinetics and intra-particle diffusion. The adsorption data followed pseudo-second order kinetic with the correlation coefficient (r ) from 0.99-1 at all concentration. Thermodynamic study revealed endothermic nature of Pb and Cd adsorption and exothermic for Ni ions. The rate of adsorption for binary and tertiary mixtures of Pb, Ni, and Cd metal ion was studied using the ideal adsorbed solution theory. The regeneration study revealed that PoAP could be re-utilized up to 4 cycles for Pb and 2 cycles for Cd and Ni ions. PoAP was successfully applied to real industrial wastewater for the removal of Pb, Cd, and Ni ions.
对聚合苹果渣（PoAP）表面作为从水溶液中去除铅、镉和镍离子的吸附剂进行了评估。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、能谱仪（EDS）、X射线衍射仪（XRD）和比表面积分析仪对PoAP进行了表征。此外，还对剂量、pH值、时间、浓度和温度等吸附影响参数进行了优化，以最大程度地从水溶液中去除金属离子。使用朗缪尔等温线模型，发现PoAP对铅、镉和镍离子的最大单层吸附容量分别为106、34.12和19.45 mg/g。采用准二级动力学和颗粒内扩散对吸附速率进行了评估。吸附数据遵循准二级动力学，在所有浓度下相关系数（r）为0.99至1。热力学研究表明，铅和镉的吸附为吸热性质，镍离子的吸附为放热性质。利用理想吸附溶液理论研究了铅、镍和镉金属离子二元和三元混合物的吸附速率。再生研究表明，PoAP对铅离子可重复使用多达4个循环，对镉和镍离子可重复使用2个循环。PoAP已成功应用于实际工业废水以去除铅、镉和镍离子。
