The potential of solid olive wastes-based adsorbent (CuO-OC) with photocatalytic power was established for the removal of total phenolics and photocatalytic discolourization of high strength olive mill wastewater (OMW). Clear insight of the FTIR and Brunauer-Emmett-Teller analyses showed that oxygen-containing functional groups of CuO-OC likely participated in the adsorption of total phenols from the OMW via a π-π interaction, hydrogen bonding and electrostatic interaction. Also, the total pore volume of CuO-OC decreased from 0.068 to 0.052 cm3 g-1 after adsorption, which suggested that phenolics were trapped within the micro- and mesopores of CuO-OC. The adsorption kinetics revealed that ∼82.7-95% of the phenolic compounds were removed within the first 360 min which is relatively faster than adsorbents and methods reported elsewhere. The isotherm results showed that Redlich-Peterson equation fit the experimental data very well with least error (χ2 = 1.46-3.19) and high correlation coefficients (0.992-0.996), which suggested a mixture of hetero- and monolayer coverage of the phenolics on the CuO-OC surface. Results obtained herein are of practical interest and the reuse efficiency of CuO-OC remained ∼60% after 5 successive recycling.

中文翻译：

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CuO涂层橄榄饼纳米复合材料可快速去除苯酚并有效去除高强度橄榄磨废水中的色素。

建立了具有光催化能力的基于橄榄废料的固体吸附剂（CuO-OC）用于去除高浓度橄榄磨机废水（OMW）中的总酚和光催化脱色的潜力。FTIR和Brunauer-Emmett-Teller分析的清晰见解表明，CuO-OC的含氧官能团可能通过π-π相互作用，氢键和静电相互作用参与了OMW中总酚的吸附。同样，吸附后，CuO-OC的总孔体积从0.068降低至0.052 cm3 g-1，这表明酚类被困在CuO-OC的微孔和中孔内。吸附动力学表明，在最初的360分钟内除去了约82.7-95％的酚类化合物，这比其他地方报道的吸附剂和方法要快。等温线结果表明，Redlich-Peterson方程非常适合实验数据，误差最小（χ2= 1.46-3.19），相关系数高（0.992-0.996），这表明酚类化合物在异氰酸酯和单层化合物上的混合存在。 CuO-OC表面。本文获得的结果具有实际意义，并且连续5次循环使用后，CuO-OC的重用效率仍保持约60％。