State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, PR China.
Environ Technol. 2011 Aug-Sep;32(11-12):1269-77. doi: 10.1080/09593330.2010.535175.
With a preliminary insight into the source and leaching behaviour ofbisphenol A (BPA) from municipal solid wastes (MSW), five kinds of plastic and four kinds of paper materials were leached by distilled water. Polyvinyl chloride (PVC) waste was found to have the highest BPA content of 12.1 microg x g(-1) and leachability of 34.7% in distilled water, while cardboard with relatively low BPA content also showed a high ratio of leaching (53.6%). Fresh leachate and leachates from a landfill of age 1.5 and 10 years were adopted as leachants for the PVC plastic and cardboard to simulate the leaching behaviour of BPA under a landfill environment. The enhancement of BPA leachability in the 10-year leachate compared with distilled water was higher than that in the other two leachates due to its basic pH and high content of humic organic matters. Meanwhile, the enhancement of BPA leachability by the fresh leachate was higher than that by the 1.5-year leachate, possibly due to the presence of small molecules such as volatile fatty acids, amino acids, etc. The paper waste was not only a minor origin of BPA leaching, but also a controlling factor in retarding BPA transformation. The BPA sorption K(f) value of the cardboard in the Freundlich equation was 0.2224 mg(1-n)) x L(n) x g(-1) (n = 0.7680), higher than that obtained in sorption experiments by natural organic adsorbents such as sediment. It suggested that the presence of paper with a high sorption capacity in MSW will restrain BPA transport and bioavailability in landfills.
初步了解了城市固体废物（MSW）中双酚 A（BPA）的来源和浸出行为后，用蒸馏水对 5 种塑料和 4 种纸材料进行了浸出实验。聚氯乙烯（PVC）废物的 BPA 含量最高，为 12.1μg·g(-1)，在蒸馏水中的浸出率为 34.7%，而相对低 BPA 含量的纸板也显示出较高的浸出率（53.6%）。新鲜浸出液和填埋场年龄为 1.5 年和 10 年的浸出液被用作 PVC 塑料和纸板的浸出剂，以模拟填埋环境下 BPA 的浸出行为。与蒸馏水相比，10 年浸出液中 BPA 浸出率的增强高于其他两种浸出液，这是由于其基本 pH 值和高含量的腐殖质有机物质。同时，新鲜浸出液对 BPA 浸出率的增强高于 1.5 年浸出液，这可能是由于存在小分子物质，如挥发性脂肪酸、氨基酸等。纸废物不仅是 BPA 浸出的次要来源，也是抑制 BPA 转化的控制因素。纸板在 Freundlich 方程中的 BPA 吸附 K(f)值为 0.2224mg(1-n))·L(n)·g(-1)（n=0.7680），高于天然有机吸附剂（如沉积物）吸附实验中得到的值。这表明，在 MSW 中存在具有高吸附能力的纸张会抑制填埋场中 BPA 的迁移和生物利用度。
