中文摘要：

考查了十四烷基二甲基苄基季铵阳离子改性黏土对海洋卡盾藻和塔玛亚历山大藻两种赤潮生物的杀灭和控制作用．结果表明，改性黏土对两种赤潮藻均有较强的去除能力和絮凝沉降作用，去除效果具有明显的剂量-效应关系和时间依赖关系．相同用量的条件下，改性黏土对海洋卡盾藻的去除效果比塔玛亚历山大藻好．质量浓度为0．012g·L^-1时，作用24h后对海洋卡盾藻的去除率可达85％，72h后达95％．质量浓度为0．016g·L^-1时，对塔玛亚历山大藻的除藻率不到50％；48h时，为77％；72h时，超过85％．在实验质量浓度和时间范围内，未改性黏土对两种赤潮藻的除藻率均未超过70％．这些结果表明，十四烷基二甲基苄基溴化铵改性黏土具有很强的除藻能力，且作用时效长，作为除藻剂有一定的应用前景．

英文摘要：

[ Abstract] The removal of the modified clay with tetradecyldimethylbenzyl ammonium cations on the harmful algal blooms （HABs） alsae, Chattondla marina and Alexandriunt tamarenze were explored. The results indicated that the modified clay had an excellent ability to extinguish the two HABs algae in dose- effect manner and time-dependent relation. When the modified clay was 0. 012 g .L^-1, 85 % C. marina ceils were removed in 24 h, and 95% in 72 h. Meanwhile, less than 50% A. tamarense cells were removed under the concentration of 0. 016 g.L^-1 in 24 h. However, the removal efficiency increased with time. 77% ofA. tamarense cells were removed in 48 h, and 85% in 72 h. Compared with the high re- moval efficiency, natural clay had less effect on the two algae. When the natural clay was 0. 03 g L^-1, the removal efficiency was less than 70% in 72 h even for C. marina. Besides, the modified clay was shown to have a strong coagulation on the two algae. These suggested that the introduction of tetrade-cyldimethylbenzyl ammonium cations could strengthen the removal ability of clay, which played an important role in the removal. The modified clay might be a potential algaecide with high effectiveness and long acting time.