三种水生植物对苯的净化作用及条件优化

为了探讨水生植物对含苯污染水体的修复效果，采用L₂₇(3¹³)正交设计法，研究了3种水生植物普生轮藻（Chara vulgaris L.）、豆瓣菜（Nasturtium officinale R.Br.）和菹草（Potamogeton crispus L.）对水体中苯的净化作用。结果表明，在实验条件下，3种植物对苯的最大去除率分别达到35.26%、69.71%和55.45%。温度、作用时间、生物量及温度与时间、温度与生物量的交互作用对普生轮藻去除苯的作用影响显著。温度和生物量对豆瓣菜去除苯的作用影响显著。作用时间对菹草去除苯的作用影响显著。3种植物均可作为良好的水质净化材料。普生轮藻和豆瓣菜适合在夏秋季选用，而菹草则适合冬春季选用。

Cleansing of Benzene by Three Hydrophytes and Condition Optimization

In order to evaluate the restoration effects of aquatic plants on benzene in polluted water, the cleansing effects on benzene were studied using three hydrophytes, Chara vulgaris L., Nasturtium officinale R.Br. and Potamogeton crispus L., by L₂₇(3¹³) orthogonal design. The results showed that under the experimental conditions, the maximum removal rates of benzene by three hydrophytes reached 35.26%, 69.71% and 55.45%, respectively. Five parameters, i.e. temperature, processing time, biomass, interaction between temperature and time, interaction between temperature and biomass, significantly influenced on removing benzene by C.vulgaris L. The influences of temperature and biomass were significant in removing benzene by N.officinale R.Br. while processing time was significant in removing benzene by P.crispus L. All three hydrophytes could be used as good materials for purifying water. C.vulgaris L. and N.officinale R.Br. may be suitable for use in summer and autumn, meanwhile, P.crispus L. is suitable for use in winter and spring.