Laboratory of Material Science and Environment, Faculty of Sciences of Sfax, University of Sfax, USA; Department of Chemistry, University of Girona, M. Aurèlia Capmany, 69, 17003 Girona, Spain.
Department of Chemistry, University of Girona, M. Aurèlia Capmany, 69, 17003 Girona, Spain.
J Environ Manage. 2018 Oct 1;223:576-585. doi: 10.1016/j.jenvman.2018.06.069. Epub 2018 Jun 29.
This study evaluated the ability of cork to adsorb a broad range of phenolic, pharmaceutical and cosmetic compounds: phenol, 2-chlorophenol, 2-nitrophenol, 2,4-dichlorophenol, pentachlorophenol carbamazepine, naproxen, ketoprofen, diclofenac, triclosan, and methyl paraben. The effect of variables such as the compound concentrations and the amount of cork were studied resulting in a highly pH dependence in the case of phenolic compounds. Maximum removal percentages and uptake values of 75% (1.61 mg/g) for 2,4-dichlorophenol, 55% (1.25 mg/g) for 2-nitrophenol, 45% (1.47 mg/g) for 2-chlorophenol, 20% (0.63 mg/g) for phenol, and 100% for pentachlorophenol, were obtained for a 30 mg L solution at pH 6, showing that the adsorption process increased with greater electronegativity of the phenolic substituting group. Removal percentages and uptakes of 82% (3.56 mg/g) for naproxen, 57% (2.31 mg/g) for ketoprofen, 50% (1.84 mg/g) for carbamazepine, 50% (1.78 mg/g) for methyl paraben, 100% for sodium diclofenac, and 100% for triclosan, were obtained using 5 mg of cork and a 1 mg L solution of each compound. The adsorption process was almost complete after 30 min for all the micropollutants. Experimental equilibrium data were analysed by Freundlich and Langmuir adsorption models. Cork has proved to be an effective sorbent for the removal of phenols and emerging contaminants from contaminated waters and is a readily available material that can be acquired at minimal or no cost in cork-producing areas.
本研究评估了软木对广泛的酚类、药物和化妆品化合物的吸附能力：苯酚、2-氯苯酚、2-硝基苯酚、2,4-二氯苯酚、五氯苯酚、卡马西平、萘普生、酮洛芬、双氯芬酸、三氯生和对羟基苯甲酸甲酯。研究了化合物浓度和软木量等变量的影响，结果表明酚类化合物对 pH 值具有高度依赖性。在 pH 值为 6 的 30mg/L 溶液中，对于 2,4-二氯苯酚可获得 75%（1.61mg/g）的最大去除率和 1.47mg/g 的最大吸附量，对于 2-硝基苯酚可获得 55%（1.25mg/g）的最大去除率和 1.25mg/g 的最大吸附量，对于 2-氯苯酚可获得 45%（1.47mg/g）的最大去除率和 0.63mg/g 的最大吸附量，对于五氯苯酚可获得 100%的去除率和 0.63mg/g 的最大吸附量，表明吸附过程随着酚类取代基的电负性增加而增加。使用 5mg 软木和 1mg/L 每种化合物的溶液，可获得萘普生的去除率和吸附量为 82%（3.56mg/g）、酮洛芬为 57%（2.31mg/g）、卡马西平为 50%（1.84mg/g）、对羟基苯甲酸甲酯为 50%（1.78mg/g）、双氯芬酸钠为 100%和三氯生为 100%。对于所有的微量污染物，吸附过程在 30 分钟后几乎完全完成。实验平衡数据通过 Freundlich 和 Langmuir 吸附模型进行分析。软木已被证明是一种从受污染的水中去除酚类和新兴污染物的有效吸附剂，并且是一种在软木生产地区可以以最小或无成本获得的现成材料。
