Study on Mutagenic Effect of Reclaimed Water in Tianjin / 环境与健康杂志

ABSTRACT

Objective To study the mutagenic effect of reclaimed water in Tianjin. Methods Reverse phase C-18 solid-phase extraction (RP-C18SPE) was used for the extraction of target compounds from water samples. Ames test was used to detect mutation. Results PAHs were detected in both low-water and high-water period,including fluorene,phenanthrene,naphthalene,acenaphthylene and acenaphthene. In the high-water period, the total concentration of 16 kinds of PAHs was 1 777.9 ng/L and 1 380.1 ng/L in untreated reclaimed water and treated reclaimed water respectively, in the low-water period,it was 2 225.1 ng/L and 1 827.1 ng/L respectively. Ames test showed that both untreated reclaimed water and treated reclaimed water could induce mutation of TA98 and TA100 strains with a dose-response relationship. Conclusion The reclaimed water used in Tianjin still contains PAHs of a certain level, which have mutagenic effect.