【摘要】 单一环境因子对水生植物复氧能力影响较大且存在不少分歧,因此研究了环境因子（光照、温度、pH值、盐度）对水生植物复氧和去除污染物能力的影响。结果表明:菹草在光照强度为80%自然光（9 600 lx）条件下,复氧能力最高,OE值达到127×10^-5;黑藻、浮萍、香蒲的复氧能力随着光照强度的升高而增加。高温不利于水生植物向水体复氧,因此在夏季高温时,可采用机械曝气方式向水体复氧。水生植物在中性环境中可向水体输送较多的氧气,在整个pH值梯度范围（6. 0～8. 0）内,沉水植物、挺水植物去除TN、TP、COD的能力较高,浮叶植物对富营养盐的去除效果欠佳。水生植物复氧能力随盐度的升高而明显下降,在盐度过高区域（0. 8%）,黑藻、菹草、浮萍和荇菜几乎没有复氧能力;水生植物对水体中TN、TP和COD的去除能力随盐度的增加也呈下降趋势。更多还原

【Abstract】 The effects of environmental factors on the aquatic plants reoxygenation are complicated. The influences of environmental factors( illumination,temperature,pH,and salinity) on the ability of aquatic plants to recover oxygen and remove pollutants were studied. With 80% light intensity( 9 600 lx),Potamogeton crispus showed the highest reoxygenation capacity and the OE value reached 127 ×10-5. The reoxygenation capacity of black algae,duckweed,and cattail increased with the increase of the light intensity. High temperature inhibited the aquatic plants from restoring DO,therefore it was recommended to utilize mechanical aeration methods under summer temperatures. Aquatic plants could transport more oxygen to the water in a neutral environment. Within the p H gradient from 6. 0 to 8. 0,submergent and emergent plants were more efficient in the removal of TN,TP and COD comparing to floating-leaf plants. The reoxygenation capacity of aquatic plants decreased significantly with the increase of salinity. In high salinity water( 0. 8%),black algae,Potamogeton crispus,duckweed,and Nymphoides peltatum barely had any reoxygenation capacity. The purification capacity of the six aquatic plants for TN,TP and COD decreased as the salinity increased.更多还原