水化硅酸钙强化空心菜浮岛除磷能力的研究  

Study on Phosphorus Removal by Water Spinach Floating Bed Enhanced by Hydrate of Calcium Silicate

作　　者：曹德平[1] 李春杰[1] 陈雪初[1] 曾晓文[1] 孔海南[1] 吴奇 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240 [2]无锡市龙和清水生态技术有限公司,江苏无锡214061

出　　处：《中国给水排水》2008年第1期22-25,共4页China Water & Wastewater

摘　　要：为了提高生态浮岛对水体中低浓度磷的去除效果,引入水化硅酸钙作为生态浮岛的基质,在人工气候室环境条件下,研究了水化硅酸钙对空心菜浮岛除磷能力的强化作用。在确定了适用于浮岛的水化硅酸钙投加量和粒径之后,通过比较不同数量空心菜的除磷效果,确定了较佳的植株数量。在此基础上,将水化硅酸钙和植物相结合,研究其对不同浓度磷的去除效果,并和普通空心菜浮岛进行比较。结果表明:水化硅酸钙强化的空心菜浮岛的除磷效果明显好于普通空心菜浮岛,前者的植株质量平均增长倍数为2.9,后者的为2.0;单独采用水化硅酸钙会导致水体的pH值从7.95上升到9.0左右,而水化硅酸钙强化的空心菜浮岛则维持水体的pH值在8.0左右。To promote the removal of low-concentration phosphorus in water body by ecological floating bed, hydrate of calcium silicate was introduced as the substrate of ecological floating bed to study its enhancing effect on phosphorus removal by water spinach floating bed in artificial climatic chamber. After the appropriate added amount and particle size were determined, the phosphorus removal efficiency by different number of water spinach was compared to determine an appropriate number. On this basis, hydrate of calcium silicate was combined with water spinach to study the removal of phosphorus with different concentration and make comparison with the ordinary floating bed. The results show that the phosphorus removal efficiency by the enhanced floating bed is better than that by the ordinary floating bed. On the average, the weight of the plant on the former increases by 2.9 times, while that on the later only increases by 2.0. The pH in water body changes from 7.95 to around 9.0 when only the hydrate of calcium silicate is used, while that when using the enhanced floating bed remains around 8.0.

关 键 词：水化硅酸钙 基质 空心菜 浮岛 除磷 

分 类 号：X173[环境科学与工程—环境科学] X52