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Olive mill wastewaters decontamination based on organo-nano-clay composites
Ceramics International ( IF 5.2 ) Pub Date : 2019-02-01 , DOI: 10.1016/j.ceramint.2018.08.155
Luciana Sciascia , Selene Casella , Giuseppe Cavallaro , Giuseppe Lazzara , Stefana Milioto , Francesco Princivalle , Filippo Parisi

Abstract Green composites for environmental applications were successfully prepared by intercalation of the biosurfactant Quillaja saponin onto montmorillonite mineral clay on varying pH and surfactant/clay ratio. Equilibrium adsorption isotherms were constructed and the system was characterized by performing TGA and XRD analyses. The efficiency of the surfactant-modified clay in the removal of the organic content present in olive mill wastewaters (OMW) was evaluated by means of spectrophotometric measurements. The interest for this cogent issue comes from the consideration that, despite their high pollutant content, OMW can be considered as a potential resource of several organic compounds which can be recovered for a wide array of pharmaceutical and industrial applications. Two different strategies were proposed. In the first one, dried surfactant/clay hybrids were added to the batch samples under continuous stirring, while in the second alternative approach the organoclays were packed in chromatography column filled with multiple alternate layers of sand and organoclay. These studies revealed the efficacy of the methods used and suggested that the modification of the montmorillonite clay substrate significantly improves the performance of the clay.

中文翻译:

基于有机纳米粘土复合材料的橄榄厂废水净化

摘要 通过将生物表面活性剂 Quillaja 皂苷嵌入到蒙脱石矿物粘土上,在不同的 pH 值和表面活性剂/粘土比例下,成功制备了用于环境应用的绿色复合材料。构建了平衡吸附等温线,并通过进行 TGA 和 XRD 分析来表征系统。通过分光光度法测量表面活性剂改性粘土去除橄榄磨废水 (OMW) 中存在的有机成分的效率。对这个令人信服的问题的兴趣来自于这样的考虑:尽管 OMW 的污染物含量很高,但可以被视为几种有机化合物的潜在资源,这些有机化合物可以回收用于广泛的制药和工业应用。提出了两种不同的策略。在第一个中,在连续搅拌下将干燥的表面活性剂/粘土混合物添加到批样品中,而在第二种替代方法中,有机粘土填充在色谱柱中,色谱柱填充有多层交替的沙子和有机粘土层。这些研究揭示了所用方法的有效性,并表明蒙脱石粘土基材的改性显着提高了粘土的性能。
更新日期:2019-02-01
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