| 张弦,王宇晖,赵晓祥,沙懿.微电场人工湿地系统对水中重金属CdZn和Cu去除效果的研究[J].农业环境科学学报,2018,37(6):1211-1218. |
| 微电场人工湿地系统对水中重金属CdZn和Cu去除效果的研究 |
| The removal effect of Cd, Zn, and Cu using a micro-electric field constructed wetland system |
| 投稿时间：2017-10-18 |
| DOI：10.11654/jaes.2017-1410 |
| 中文关键词: 微电场 人工湿地 水力停留时间 电压 |
| 英文关键词: micro-electric field constructed wetland hydraulic retention time voltage |
| 基金项目:国家自然科学基金项目（51309053） |
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| 摘要点击次数: 1910 |
| 全文下载次数: 1733 |
| 中文摘要: |
| 为探究高效、生态、环保的水体重金属污染修复方法，将电化学处理与生态工程技术进行优势互补，提出微电场人工湿地高效水体重金属修复系统。通过构建模拟试验人工湿地装置，研究不同水力停留时间和电压条件下，水葱和灯芯草人工湿地对重金属的去除效果，寻找微电场人工湿地处理重金属废水的湿地植物优势种和最佳电压与水力停留时间。结果表明，水葱人工湿地对水中重金属的处理效果比灯芯草人工湿地高20%以上。当水力停留时间为5 d、电压为2 V左右时，Cd、Zn和Cu 3种重金属的去除率在水葱人工湿地中分别达到了74.0%、75.8%和95.6%，去除效果最好。两种植物对3种重金属的富集能力有所差异，水葱根部对3种重金属富集系数按从大到小依次是Cu（288.24） > Zn（143.78） > Cd（127.75），而灯芯草根部对3种重金属富集系数则是Cu（299.84） > Cd（166.34） > Zn（159.61）。统计分析表明，电压和水力停留时间都对微电场人工湿地去除水中重金属存在影响，但电压的影响更为显著。 |
| 英文摘要: |
| To explore a heavy metal wastewater treatment process with high effectiveness, the ecological, and environmental complementary advantages of electrochemical techniques and constructed wetland were coupled in this study to build a new treatment system called a "micro-electric field constructed wetland." Through a simulation test on two different plants species, Scirpus tabernaemontani and Juncus roemerianus, we planted a micro-electric field constructed wetland and removed heavy metals from aqueous solution with different hydraulic retention times(HRT) and voltages to find the best conditions for micro-electric field constructed wetland wastewater treatment. The results demonstrated that the treatment efficiency of S. tabernaemontani planted in constructed wetland was more than 20% higher than that of J. roemerianus planted in constructed wetland. When the HRT was 5 d and the voltage was about 2 V, the removal efficiencies of Cd, Zn and Cu were 74.0%, 75.8%, and 95.6%, respectively, and the removal efficiency is the best. Besides, the enrichment ability of three kinds of heavy metals was different. The root biomass enrichment coefficient of S. tabernaemontani was in the order of Cu(288.24) > Zn(143.78) > Cd(127.75), but that of J. roemerianus was in the order of Cu(299.84) > Cd(166.34) > Zn(159.61). Statistical analysis shows that both the voltage and HRT have an impact on the removal of heavy metals in a micro-electric field constructed wetland, but the influence of voltage is more significant. |
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