ZENG Xiaomei,LIU Peng,ZHANG Xiaobin.Phytoremediation of Urban Wastewater by Ornamental Hydrophytes[J].Research of Soil and Water Conservation,2015,22(05):349-353.
水生观赏植物对城市污水的修复研究
- Title:
- Phytoremediation of Urban Wastewater by Ornamental Hydrophytes
- 分类号:
- Q945.17;X703;X173
- 摘要:
- 将黄花鸢尾、石菖蒲、菖蒲、千屈菜、泽泻、玉带草6种水生观赏植物种植于模拟人工湿地系统中，对城市污水进行绿色修复研究。分别在第5天、第10天、第15天测定污水中总氮（TN）、总磷（TP）、化学需氧量（COD）、生化需氧量（BOD5）、重金属元素（Cr，Pb，Cd）的含量，研究水生观赏植物对城市污水的处理效果和修复能力。结果表明：各植物系统对TN，TP，COD，BOD5以及重金属Cr，Pb，Cd去除效率随时间的推移逐渐上升，至第15天去除效率分别达88.1%，95.9%，90.6%，86.7%，78.1%，83.2%，91.4%以上。各植物系统对各种污染物的去除效率呈现一定差异，处理时间的不同对植物的修复效果也存在一定影响。6种水生观赏植物中，综合净化能力以黄花鸢尾和石菖蒲最为突出，是值得推荐的城市污水修复植物。
- Abstract:
- Based on the constructed wetland systems simulated with Iris pseudacorus, Acorus gramineus, Acorus calamus, Lythrum salicaria, Alisma orientale and Reinekea carnea, the study on the phytoremediation effect of urban wastewater was carried out. We determined TN, TP, COD, BOD5 and heavy metals (Cr, Pb, Cd) on the 5th day, 10th day and 15th day, and investigated the phytoremediation effect of urban wastewater. Results indicated that scavenging efficiency of all treating-systems to TN, TP, COD, BOD5 and heavy metals (Cr, Pb, Cd) in the wastewater increased gradually over time, which were above 88.1%, 95.9%, 90.6%, 86.7%, 78.1%, 83.2% and 91.4%, respectively, on the 15th day. This was mainly caused by differences in plant physiological structures and functions, while components in the wastewater also affected the phytoremediation. On the other hand, abilities of plants to scavenge nutrients varied in different treating time. In view of either scavenging efficiency or contribution of plants than other plants, Acorus gramineus and Iris pseudacorus are good species for bio-remediation of composite-polluted water such as urban wastewater.
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备注/Memo
收稿日期:2014-04-25;改回日期:2014-10-08。
基金项目:浙江省教育厅高等学校访问学者专业发展项目（FX2014137）
作者简介:曾小梅(1980-),女,湖南邵阳人,硕士,讲师,工程师,主要从事环境污染与治理研究。E-mail:xmzeng@126.com