Department of Environmental Science, Zhejiang University, Hangzhou 310058, China.
J Environ Sci (China). 2012;24(4):675-81. doi: 10.1016/s1001-0742(11)60891-7.
To better understand the interaction mechanisms of plant surfaces with polar organic compounds, sorption of 4-chlorophenol, 2,4-dichlorophenol, and 2,4,6-trichlorophenol by fruit cuticles (i.e., tomato, apple, and pepper), and potato tuber periderm were investigated. The roles of cuticular components (waxes, cutin, cutan and sugar) on sorption of chlorophenols are quantitatively compared. Cutin and waxes govern the sorption capacity of bulk apple cuticle by hydrophobic interactions. Potato periderm with highest sugar content exhibits the lowest sorption capability for the chlorophenols. With the increase of hydrophobicity (i.e., Kow ) of sorbate, the relative contribution of lipophilic components (wax, cutin and cutan) on total sorption increases, however, the ratios of Koc to Kow decreases due to increasing ionization degree of sorbates.
为了更好地理解植物表面与极性有机化合物的相互作用机制，研究了果壳（如番茄、苹果和辣椒）和马铃薯块茎外表皮对 4-氯苯酚、2,4-二氯苯酚和 2,4,6-三氯苯酚的吸附作用。定量比较了角质层成分（蜡、角质、角质素和糖）对氯苯酚吸附的作用。角质和蜡通过疏水相互作用控制着苹果角质层的整体吸附能力。糖含量最高的马铃薯外表皮对氯苯酚的吸附能力最低。随着吸附物疏水性（即 Kow）的增加，亲脂性成分（蜡、角质和角质素）对总吸附的相对贡献增加，但是由于吸附物的离解度增加，Koc 与 Kow 的比值减小。
