Peeters Kelly, Miklavčič Višnjevec Ana, Tavzes Črtomir
InnoRenew CoE, Livade 6a, 6310 Izola, Slovenia.
Andrej Marušič Institute, University of Primorska, Muzejski Trg 2, 6000 Koper, Slovenia.
Nanomaterials (Basel). 2022 Jul 6;12(14):2327. doi: 10.3390/nano12142327.
Olive mill waste water (OMWW), a by-product created during the processing of olive oil, contains high amounts of polyphenolic compounds. If put to further use, these polyphenolic compounds could be a valuable resource for the speciality chemical industry. In order to achieve this, isolation of the polyphenolic compounds from OMWW is needed. Several techniques for this process already exist, the most widely used of which is adsorption beds. This research describes new ways of collecting polyphenolic compounds by using unmodified iron oxide (FeO) particles and FeO modified with silica gel (FeO@C18), citric acid (FeO@CA), and sodium dodecyl sulphate (FeO@SDS). This approach is superior to adsorption beds since it can be used in a continuous system without clogging, while the nano-sized shapes create a high surface area for adsorption. The results of this study show that, if used in a loop system of several adsorption and desorption cycles, (un)modified FeO has the potential to collect high concentrations of polyphenolic compounds. A combination of different modifications of the FeO particles is also beneficial, as these combinations can be tailored to allow for the removal of specific polyphenolic compounds.
橄榄油厂废水（OMWW）是橄榄油加工过程中产生的副产品，含有大量多酚类化合物。如果能进一步加以利用，这些多酚类化合物对于精细化工行业来说可能是一种宝贵资源。为了实现这一点，需要从OMWW中分离出多酚类化合物。目前已经存在几种用于此过程的技术，其中应用最广泛的是吸附床。本研究描述了使用未改性的氧化铁（FeO）颗粒以及用硅胶（FeO@C18）、柠檬酸（FeO@CA）和十二烷基硫酸钠（FeO@SDS）改性的FeO来收集多酚类化合物的新方法。这种方法优于吸附床，因为它可用于连续系统且不会堵塞，同时纳米尺寸的形状为吸附创造了高表面积。本研究结果表明，如果用于几个吸附和解吸循环的回路系统中，（未）改性的FeO有潜力收集高浓度的多酚类化合物。FeO颗粒的不同改性组合也有益处，因为这些组合可以进行定制，以实现特定多酚类化合物的去除。
