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Bottled water may not be safer, or healthier, than tap water. The present studies have proved that styrene and some other aromatic compounds leach continuously from polystyrene (PS) bottles used locally for packaging. Water sapmles in contact with PS were extracted by a preconcentration technique called as "purge and trap" and analysed by gas chromatograph-mass spectrometer (GC/MS). Eleven aromatic compounds were identified in these studies. Maximum concentration of styrene in PS bottles was 29.5 μg/L. Apart from styrene, ethyl benzene, toluene and benzene were also quantified but their concentrations were much less than WHO guide line values. All other compounds were in traces. Quality of plastic and storage time were the major factor in leaching of styrene. Concentration of styrene was increased to 69.53 μg/L after one-year storage. In Styrofoam and PS cups studies, hot water was found to be contaminated with styrene and other aromatic compounds. It was observed that temperature played a major role in the leaching of styrene monomer from Styrofoam cups. Paper cups were found to be safe for hot drinks. 相似文献
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废聚苯乙烯泡沫塑料改性产品在水处理中的应用 总被引:3,自引:0,他引:3
以废聚苯乙烯汇沫塑料为原料,在一定条件下,合成水溶性高分子聚合物聚苯乙烯碘酸钠(NaPSS)。对3种工业废水的混凝沉降试验表明:NaPSS能提高沉降速度30%~60%,助凝性能较接近PAM,在一定程度上可替代PAM。 相似文献
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