消除有机物质,如苯酚,在常规和生物过程中,一直被认为是石油工业的挑战。在这项工作中,还原氧化石墨烯(rGO),从纤维素生物质(CB-rGO)获得,作为棉花废物,在模拟炼油厂流出物的水溶液中用作苯酚吸附剂。CB-rGO使用HRTEM进行表征,拉曼,XRD,FTIR,BET,和Zeta分析。pH等变量的行为,接触时间,温度,rGO质量,跳开关和吸附质浓度对吸附过程的特性进行了连续的研究。在100至300mg/L的吸附剂浓度范围内评估了吸附过程的这些参数,pH范围为2-11,吸附剂质量为5-25mg,接触时间为0-180分钟,温度为20-60℃。与Langmuir和Sips模型相比,Freundlich方程更好地描述了吸附等温线数据,尽管R2值差异很小。使用Boyd模型分析了机理扩散,并确认是吸附过程中的限速步骤。通过验证热力学数据,证实了CB-rGO吸附苯酚过程的吸热性质。从合成流出物中成功去除苯酚突出了从工业残余物中获得的这种吸附剂的有前途的潜力,并且与确定用于去除这种污染物的其他材料的合成相比,它是生态上更可持续的替代品。
The elimination of organic substances, such as phenol, in conventional and biological processes, has been considered a challenge for the petroleum industry. In this work, reduced graphene oxide (rGO), obtained from cellulosic biomass (CB-rGO), as cotton waste, was employed as a phenol adsorbent in an aqueous solution simulating refinery effluent. The CB-rGO was characterized using HRTEM, Raman, XRD, FTIR, BET, and zeta analysis. The behavior of variables such as pH, contact time, temperature, CB-rGO mass, and adsorbate concentration on the characteristics of the adsorption process were continuously investigated. These parameters of the adsorption process were evaluated across a range of adsorbent concentrations from 100 to 300 mg/L, pH in the range of 2-11, adsorbent mass 5-25 mg, contact time of 0-180 min, and temperature of 20-60 °C. The adsorption isotherm data were better described by the Freundlich equation compared to the Langmuir and Sips models, despite the small difference in R2 values. Mechanism diffusion was analyzed using the Boyd model and confirmed to be the rate-limiting step in the adsorption process. The endothermic nature of this CB-rGO adsorption process with phenol was confirmed by verifying the thermodynamic data. This successful removal of phenol from synthetic effluents highlights the promising potential of this adsorbent obtained from an industrial residue and being an ecologically more sustainable alternative compared to the synthesis of other materials identified to remove this contaminant.