Food Science Laboratory, Department of Biology, Faculty of Sciences-Semalia, Cadi Ayyad University, P.O. Box 2390, 40090 Marrakech, Morocco.
Food Science Laboratory, Department of Biology, Faculty of Sciences-Semalia, Cadi Ayyad University, P.O. Box 2390, 40090 Marrakech, Morocco.
Food Chem. 2012 May 1;132(1):406-12. doi: 10.1016/j.foodchem.2011.11.013. Epub 2011 Nov 10.
Olive trees play an important role in the Moroccan agro-economy, providing both employment and export revenue. However, the olive oil industry generates large amounts of wastes and wastewaters. The disposal of these polluting by-products is a significant environmental problem that needs an adequate solution. On one hand, the phytotoxic and antimicrobial effects of olive mill wastewaters are mainly due to their phenolic content. The hydrophilic character of the polyphenols results in the major proportion of natural phenols being separated into the water phase during the olive processing. On other hand, the health benefits arising from a diet containing olive oil have been attributed to its richness in phenolic compounds that act as natural antioxidants and are thought to contribute to the prevention of heart diseases and cancers. Olive mill wastewater (OMW) samples have been analysed in terms of their phenolic constituents and antioxidant activities. The total phenolic content, flavonoids, flavanols, and proanthocyanidins were determined. The antioxidant and radical scavenging activity of phenolic extracts and microfiltred samples was evaluated using different tests (iron(II) chelating activity, total antioxidant capacity, DPPH assays and lipid peroxidation test). The obtained results reveal the considerable antioxidant capacity of the OMW, that can be considered as an inexpensive potential source of high added value powerful natural antioxidants comparable to some synthetic antioxidants commonly used in the food industry.
橄榄树在摩洛哥的农业经济中扮演着重要的角色，为就业和出口收入提供了支持。然而，橄榄油产业产生了大量的废物和废水。这些污染副产品的处理是一个重大的环境问题，需要一个适当的解决方案。一方面，橄榄厂废水的植物毒性和抗菌作用主要归因于其酚类含量。多酚的亲水性导致在橄榄加工过程中，大部分天然酚类物质分离到水相中。另一方面，饮食中含有橄榄油所带来的健康益处归因于其富含酚类化合物，这些化合物具有天然抗氧化剂的作用，被认为有助于预防心脏病和癌症。对橄榄厂废水（OMW）样品进行了酚类成分和抗氧化活性分析。测定了总酚含量、类黄酮、黄烷醇和原花青素。使用不同的测试方法（铁(II)螯合活性、总抗氧化能力、DPPH 测定和脂质过氧化试验）评估了酚类提取物和微滤样品的抗氧化和自由基清除活性。所得结果表明，OMW 具有相当大的抗氧化能力，可以被认为是一种廉价的、有潜力的高附加值天然抗氧化剂来源，与食品工业中常用的一些合成抗氧化剂相当。
