大水面放养水葫芦对太湖竺山湖水环境净化效果的影响

利用水葫芦等生长快、生物量高的漂浮植物来净化污染水体,已成为目前水体生态修复的一种快捷有效的方法.在太湖竺山湖放养水葫芦后对水体营养盐吸收和水质净化效果的影响进行了研究.结果表明,受风浪扰动等影响,水体交换强烈,水葫芦放养区内溶解氧含量变化幅度在3.50～11.20 mg/L之间,未出现厌氧现象.水葫芦须根具有较强的吸...

Purification Effects of Large-Area Planting Water Hyacinth on Water Environment of Zhushan Bay, Lake Taihu

Using water hyacinth and other fast-growing and high biomass of floating plants to purify polluted water has become an efficient and effective ecological restoration method at present. Effects of nutrients adsorption and water purification of planting water hyacinth on water quality in Zhushan Bay were studied. The results indicated that no anoxia was observed in water hyacinth planting areas because of wave disturbance and strong water exchange. Concentrations of TN and TP in water hyacinth planting areas were higher than that in the outside of stocking area(the content ranged 3.03-7.45 mg/L and 0.15-0.38 mg/L,respectively),and the content changes ranged 3.37-8.02 mg/L and 0.15-0.36 mg/L,respectively. The higher concentration of TN and TP in water indicated the water body was heavily polluted. Water hyacinth roots have a strong ability to adsorb suspended solids and algae cells,the concentration of Chl-a in stocking areas was higher than that in stocking fringe and outside,the maximum Chlorophyll in the stocking region in August was 177.01 mg/m³,and at the same time the concentrations in planting fringe and outside were 101.53 mg/m³ and 76.96 mg/m³,respectively. Higher Chl-a content on water hyacinth roots indicated that water hyacinth had strong blocking effects on algae cells,and demonstrated it had a great purification effects on eutrophicated water,and it also provides a basis for the larger polluted water bodies purification in using water hyacinth.