Mapúa Institute of Technology, Muralla St. Intramuros, Manila 1002, Philippines.
Department of Chemistry, Shiraz Branch, Islamic Azad University, P.O. Box 71955-149, Shiraz, Fars, Iran.
J Colloid Interface Sci. 2016 Mar 15;466:186-97. doi: 10.1016/j.jcis.2015.12.019. Epub 2015 Dec 10.
The application of ostrich bone waste-loaded a cationic surfactant (OBW-OH-CTABr) bioadsorbent for benzene, toluene, ethylbenzene and p-xylene (BTEX) removal from the synthetic and real waters have been studied, and the prepared biomaterials were studied by Fourier transform infrared (FTIR), X-ray diffraction (XRD), surface area measurements (BET), scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) and point of zero (pH(PZC)). The immobilization of CTABr molecules on the framework of modified OBW showed good tendency to adsorb BTEX from aqueous solution. The exposure time to obtain equilibrium for maximum removal of BTEX was observed to be 60 min. The removal kinetics of BTEX has been evaluated in terms of pseudo-first- and -second-order kinetics, and the Freundlich and Langmuir isotherm models have also been utilized to the equilibrium removal data. The removal process was spontaneous and endothermic in nature and followed pseudo-second-order kinetic model. The immobilized CTABr showed high reusability because of its high adsorption efficiency after 12th cycles. The proposed low-cost bioadsorbent could also be utilized to adsorb BTEX from the real water (Anzali lagoon water). The OBW-OH-CTABr composite is indeed an attractive biomaterial for drinking water-based pollutants and act as an adsorbent for BTEX and oil spills especially in third world due to its low-cost preparation and regeneration and clean processing of the biomaterial with no byproducts after utilize.
已研究了将鸵鸟骨废料负载阳离子表面活性剂（OBW-OH-CTABr）生物吸附剂应用于从合成水和实际水样中去除苯、甲苯、乙苯和对二甲苯（BTEX），并通过傅里叶变换红外（FTIR）、X 射线衍射（XRD）、表面积测量（BET）、扫描电子显微镜（SEM）、能谱（EDX）和零电荷点（pH（PZC））对制备的生物材料进行了研究。CTABr 分子在改性 OBW 骨架上的固定化显示出从水溶液中吸附 BTEX 的良好趋势。观察到达到最大去除 BTEX 的平衡的暴露时间为 60 分钟。根据拟一级和拟二级动力学、 Freundlich 和 Langmuir 等温线模型评估了 BTEX 的去除动力学，也利用了平衡去除数据。去除过程是自发的和吸热的，遵循拟二级动力学模型。由于在第 12 次循环后具有较高的吸附效率，固定化 CTABr 显示出较高的可重复使用性。由于其低成本制备、再生以及在使用后无副产物的生物材料的清洁处理，这种廉价的生物吸附剂还可用于从实际水（安扎利泻湖）中吸附 BTEX。OBW-OH-CTABr 复合材料确实是一种有吸引力的生物材料，可用于去除饮用水中的污染物，并且可以作为 BTEX 和溢油的吸附剂，特别是在第三世界，因为其制备和再生成本低，并且在使用后无副产物的生物材料的清洁处理。
