Plant Uptake-Assisted Round-the-Clock Photocatalysis for Complete Purification of Aquaculture Wastewater Using Sunlight
Plant Uptake-Assisted Round-the-Clock Photocatalysis for Complete Purification of Aquaculture Wastewater Using Sunlight
复制标题
植物吸收辅助全天候光催化利用阳光彻底净化水产养殖废水
DOI：
10.1021/es505540x
复制
发表时间：
2015-02-17
影响因子：
11.4
通讯作者：
Li, Hexing
中科院分区：
文献类型：
--
作者：
Bian, Zhenfeng;Cao, Fenglei;Li, Hexing
设计了一种配备太阳能电池、Bi2O3/TiO2薄膜光催化剂和芹菜植物的新型反应器，并将其用于水产养殖废水的净化。 Bi2O3/TiO2薄膜光催化剂在阳光照射下开始光催化降解有机氮化合物。同时，太阳能电池吸收多余的阳光并将其转化为电能，然后在夜间启动紫外线灯，从而实现全天候的光催化作用。随后，有机氮化合物光催化降解产生的无机氮，包括NH4+、NO2和NO3，可以被芹菜植物吸收作为肥料，减少二次污染。结果发现，循环24 h后，有机氮化合物和NO2均被完全去除，NH4+和NO3含量也分别下降了30%和50%。该反应器可重复使用，在实际应用中表现出良好的潜力。
A novel reactor equipped with solar batteries, Bi2O3/TiO2 film photocatalyst, and celery plant was designed and used for purification of aquaculture wastewater. The Bi2O3/TiO2 film photocatalyst started photocatalytic degradation of organonitrogen compounds under irradiation of sunlight. Meanwhile, the solar batteries absorbed and converted excess sunlight into electric energy and then started UV lamps at night, leading to round-the-clock photocatalysis. Subsequently, the inorganic nitrogen species including NH4+, NO2, and NO3 resulting from photocatalytic degradation of the organonitrogen compounds could subsequently be uptaken by the celery plant as the fertilizer to reduce the secondary pollution. It was found that, after 24 h circulation, both organonitrogen compounds and NO2 species were completely removed, while NH4+ and NO3 contents also decreased by 30% and 50%, respectively. The reactor could be used repetitively, showing a good potential in practical application.