摘要
采用人工模拟试验方法，在2007年11月至2008年10月期间比较研究了水葫芦（Eichhornia crassipes）对4种不同程度富营养化水体氮、磷的净化效果和去除能力。结果显示，水葫芦在4种富营养化水体中均可正常生长，全年的平均生物量增长率为n096—0．262kg／（m^2·d），且明显受温度的影响。经过21d的净化，水葫芦对4种富营养化水体氮、磷均表现出良好的净化效果。4种富营养化水体的TN（总氮）、NH4^＋-N（铵态氨）、TP（总磷）平均浓度分别由初始的2.06-20．08mg／L、0.27～10．98mg／L和0.14—1．43mg／L降至n27—8．87mg／L、0．06-0．71mg／L和0．03-0．47mg／L。水葫芦对TN的平均去除率随初始TN浓度的增加而降低，对TP的去除率则相反；水葫芦对4种不同程度富营养化水体的TN、NH4^＋- N、TP的平均去除率分别为55．82％-86．55％、78．15％-93．54％和76．01％～92．53％。水葫芦对TN、NH4^＋ N、TP的单位面积负荷去除速率则均随水体初始氮、磷浓度的增加而升高，平均分别为84．69—533．70mg／（m^2·d）、12.94-478．70mg／（m^2·d）和5．01～63．06mg／（m^2·d）。
From November in 2007 to October in 2008, the purification effect and removal ability of nitrogen and phosphorous from differently eutrophic water by water hyacinth were comparatively studied by simulation experiments. The results showed that water hyacinth were able to grow normally in four eutrophic water, in which biomass growth rate during experimental period was between 0. 096 kg/（m^2·d） and 0. 262 kg/（ m^2·d）. The water hyacinth displayed great ability to remove nitrogen and phosphorous from eutrophic water. After purification for 21 d, the average concentrations of TN, NH4 -N and TP in eutrophic water decreased from 2. 06 - 20. 08 mg/L, 0. 27 - 10. 98 mg/L and 0. 14 - 1.43 mg/L to 0. 27 -8.87 mg/L,0. 06 -0. 71 mg/L and 0. 03 -0. 47 mg/L,respeetively. The average removal rate of TN by water hyacinth droped with the increase of initial concentration of TN, while the average removal rate of TP increased with the increase of initial concentration of TP. The removal rates of TN, NH4^＋ -N and TP by water hyacinth from four eutrophic water were 55.82 % -86. 55 % ,78.15 % -93.54% , and 76. 01% -92. 53 % , respectively. And the average load removal rates of TN,NH4^＋ -N and TP by water hyacinth from four eutrophic water were 84. 69 -533.70 mg/（m^2·d）, 12. 94 -478.70 rag/（ m^2·d） and 5.01 -63.06 mg/（m^2·d） ,respectively,which increased with the increase of initial concentrations of nitrogen and phosphorous.
出处
《江苏农业学报》
CSCD
北大核心
2009年第5期1039-1046,共8页
Jiangsu Journal of Agricultural Sciences
基金
国家支撑计划(2007BAD89B12)
关键词
水葫芦
富营养化水体
氮
磷
去除率
water hyacinth
eutrophic water
nitrogen
phosphorous
removal rate
