河岸混合植物带改善河水水质的现场研究

在1年的时间里在现场利用混合植物河岸带、无植物空白带对受污染河水进行处理.对COD、NH 4、TP、浊度和水温进行了监测,并比较了不同季节里混合植物带改善河水水质的效果.混合植物带在夏、秋季改善河水水质的效果好于冬、春季.混合植物带在夏季对COD、NH4 -N、TP和浊度的去除率分别为37.01%、69.21%、62.45%和99.17%,在冬季对河水水质也有一定程度的改善.混合植物带可以降低河水温度及河水早晚温差,起到改善局部水环境的作用.混合植物带与空白带的对比表明植物对去除水中污染物、改善局部水环境起着重要作用.

Field study on improvement of river water quality by riparian mixed plant zone

Water from polluted river had been treated with riparian mixed plant zone in the field for one year. Water quality indexes such as COD, NHf-N, TP, turbidity, and water temperature were tested. Results were compared by seasons. The results showed that the mixed plants give better water quality in summer and autumn than in winter and spring. In summer, the mixed plant zone removes 37.01% of the COD, 69.21% of the ammonia, 62. 45% of the phosphorous, and 99.17% of the turbidity. It can also improve water quality to some extent in winter. The mixed plant zone can reduce effluent temperature and effluent temperature difference between evening and morning and then improve water microenvironment locally. Comparisons between riparian zones with mixed plant and without aquatic plant showed that the mixed plants act importantly on removing pollutants, improving local microenvironment of water.