Department of Chemical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
Department of Chemical Engineering, Faculty of Engineering and Petroleum, Hadhramout University, Mukalla, Hadhramout, Yemen.
J Environ Manage. 2018 Nov 15;226:358-364. doi: 10.1016/j.jenvman.2018.08.025. Epub 2018 Aug 18.
Poly(trimesoyl chloride-melamine) was grafted on palygorskite via in situ interfacial polymerization. The poly(trimesoyl chloride-melamine)-grafted palygorskite (PTMP) composite was characterized by Fourier transform infrared spectroscopy (FTIR), Energy Dispersive X-Ray Spectroscopy (EDX), N-physisorption, and scanning electron microscope (SEM). The performance of PTMP as an adsorbent was evaluated for the removal of methylene blue dye (MB) in batch and column systems. The effects of initial dye concentration, contact time, temperature and initial pH on the efficiency of MB removal were investigated. A high adsorption efficiency (≈100%) was shown by PTMP removal within 8 min with high Langmuir monolayer capacity of 64.5 mg/g at 25 °C. The mechanisms of adsorption were evaluated by isotherm and kinetic models. The activation energy E and different thermodynamic parameters, for example, ΔG, ΔS, and ΔH were calculated. The prepared composite demonstrated to be an efficient adsorbent for simultaneous removal of dye and toxic metals such as As(III), Cr(III), Mo(II), Co(III), Ni(II), and Hg(II). The dye removal was evaluated by a packed bed column system and showed an excellent adsorption performance with 90 min breakthrough at 160 ppm of initial dye concentration.
通过原位界面聚合，将聚均苯三甲酰氯-三聚氰胺接枝到坡缕石上。用傅里叶变换红外光谱（FTIR）、能谱（EDX）、N 物理吸附和扫描电子显微镜（SEM）对聚均苯三甲酰氯-三聚氰胺接枝坡缕石（PTMP）复合材料进行了表征。研究了初始染料浓度、接触时间、温度和初始 pH 值对 MB 去除效率的影响，评估了 PTMP 作为吸附剂在批处理和柱系统中去除亚甲基蓝染料（MB）的性能。结果表明，PTMP 在 8 min 内即可达到 100%的高吸附效率，在 25°C 时具有 64.5 mg/g 的高朗缪尔单层容量。通过等温线和动力学模型评估了吸附机制，并计算了吸附的活化能 E 和不同的热力学参数，例如 ΔG、ΔS 和 ΔH。该制备的复合材料被证明是一种高效的吸附剂，可同时去除染料和有毒金属，如 As(III)、Cr(III)、Mo(II)、Co(III)、Ni(II)和 Hg(II)。通过填充床柱系统评估了染料的去除效果，在 160 ppm 的初始染料浓度下，在 90 min 时即可达到良好的吸附性能。
