摘要
通过温室静态模拟试验研究了槐叶萍、野荸荠、铜钱草、空心菜等水生植物及其组合对富营养化水体TN、TP等的能力。结果显示,4种水生植物及其组合对模拟污水TN、TP、氨氮的去除率高于对照组;空心菜 + 野荸荠组合TN去除率和氨氮率、槐叶萍 + 野荸荠 + 铜钱草组合TP去除率达到最高,分别为30.3%、80.9%和35.4%,显著优于其他水生植物处理组。槐叶萍 + 野荸荠组合的吸收作用对污水TN的削减贡献率最高,为5.8%,槐叶萍 + 野荸荠 + 铜钱草组合对TP的削减贡献率达到最高,为33.67%。最终确定槐叶萍 + 野荸荠 + 铜钱草组合为高浓度富营养化水体TN、TP净化效果最优模式。另外,通过合理的收割措施既能转移去除污水中污染物,又有利于植物的恢复和再生,是一种可供选择的生态修复辅助措施。
Eutrophication has been recognized as one of serious ecological problems in the world. Phytoremediation has gradually attracted the attention of the academic community with its low investment and environmentally friendly features. The tested aquatic plants in this experiment were Salvinia natans, Ipomoea aquatica, Heleocharisplantagineiformis, Hydrocotyle vulgaris and their combinations. The aim of this study was to study the effects of different aquatic plant combinations on concentrations of total phosphorus (TP), total nitrogen (TN), ammonia nitrogen in the polluted water. The results showed that the removal rates of four tested plants were higher than those of the control group. The removal rates of TN and  by Ipomoea aquatica + Heleocharisplantagineiformis were 30.3% and 80.9%, and the removal rate of TP (35.4%) by Salvinia natans + Heleocharisplantagineiformis + Hydrocotyle vulgaris was the highest. Combination of Salvinia natans + Heleocharisplantagineiformis + Hydrocotyle vulgaris was found as an optimal model for the removal of TN and TP by aquatic plants. Harvest treatment of aquatic plants was an alternative measure to improve growth and removal of pollutants.
出处
《环境保护前沿》
2018年第5期436-446,共11页
Advances in Environmental Protection
基金
广东省自然科学基金重大基础培育项目(No.2015A030308015)
国家自然科学基金(31670513)
广东省科技计划(2016A020221023)。
