a College of Resources and Environment , Yangtze University , Wuhan , China.
b China University of Geosciences , Wuhan , China.
Int J Phytoremediation. 2019;21(3):181-190. doi: 10.1080/15226514.2018.1501342. Epub 2019 Jan 18.
Metal decontamination and leaching alleviation capacity of Eucalyptus globulus with and without electric field were investigated using ICP-MS. The biomass production of the chosen plant increased from 0.87 kg in planting control without electrokinetic treatment to 1.16 and 1.42 kg in experiments with electric field supplied by storage battery and solar cell, respectively. Under the influence of electric field with a voltage of 6.5 V, significantly more Cd, Pb and Cu were extracted by the species. Precipitation simulation was performed to evaluate the capacity of battery and solar panel to intercept leaching. The total volume of leachate gathered from the control decreased from 1012 mL to 299 and 336 mL in containers treated by storage battery and solar cell, respectively. In addition to reduction of leachate, the leaching mass of Cd, Pb and Cu was decreased significantly by electric fields (both battery and solar cell) treatments. The effect of remediation and environmental risk alleviation by solar cell was comparable with storage battery, at least during the 30-day experimental period. On the basis of the present study, solar cell should be a suitable substitute for conventional power supply to improve metal polluted soil when considering phytoremediation efficiency and energy consumption.
采用 ICP-MS 研究了带电场和不带电场的蓝桉树对金属的去污和解吸能力。选择的植物的生物量产量从无电动处理的种植对照中的 0.87kg 增加到电池和太阳能电池分别供电的实验中的 1.16kg 和 1.42kg。在 6.5V 电场的影响下，该物种提取了更多的 Cd、Pb 和 Cu。进行沉淀模拟以评估电池和太阳能电池板拦截浸出的能力。从对照容器中收集的浸出液总量从 1012mL 分别减少到电池和太阳能电池处理容器中的 299mL 和 336mL。除了减少浸出液外，电场（电池和太阳能电池）处理还显著减少了 Cd、Pb 和 Cu 的浸出量。太阳能电池的修复和环境风险缓解效果与电池相当，至少在 30 天的实验期间内是如此。基于本研究，在考虑植物修复效率和能耗的情况下，太阳能电池应该是改善金属污染土壤的传统电源的合适替代品。
