石化废水中酚对凤眼莲生长的影响

半动态酚毒性模拟试验表明：酚浓度高于600mg／l，凤眼莲几天内中毒死亡；酚浓度350mg／l以上亦造成不可恢复的损伤；酚浓度40mg／l以上，凤眼莲生长受到不同程度的抑制。同时叶绿素含量及a／b比率，光合作用速率及生长率等亦随酚浓度增高而降低。较强光照增加了酚的毒性影响。酚浓度25mg／l以下对凤眼莲无明显抑制影响。10mg／l以下浓度的酚还可以促进凤眼莲的生长。酚使凤眼莲无性繁殖能力下降但可促进其提早开花。

EFFECTS OF THE PHENOL IN PETROCHEMICAL WASTEWATER ON THE GROWTH OF WATER HYACINTH

Semi-dynamic phenol toxicologic simulation test has been conducted. Results showed that when phenol concentration (cp) in water wa above 600 mg/l, the hyacinths died in a few days; when cp was higher than 40 mg/l, the growth of hyacinths slowed down to various extents, with leaves and roots partially or totally damaged, and the chlorophyll content, chl. a/b ratio, photosynthesis speed and growth rate all decreased successively as cp was rising. Intense sun-light aggravted the toxic effect of phenol on the plant. Phenol with concentrations lower than 25 mg/l had little inhibitory effect on the hyacinths and, with cp lower than 10 mg/l, it could actually promote the growth of the plant. It was found that phenol at lower concentration could inhibit asexual reproduction but could promote earlier blooming of the hyacinths.