Qin Pan, Lu Shaoyong, Liu Xiaohui, Wang Guoqiang, Zhang Yunxiao, Li Deliang, Wan Zhengfen
State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria and Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Water Sciences, Beijing Normal University, Beijing 100875, China.
State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria and Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Water Sciences, Beijing Normal University, Beijing 100875, China.
Sci Total Environ. 2020 Dec 20;749:141668. doi: 10.1016/j.scitotenv.2020.141668. Epub 2020 Aug 11.
In this study, three types of constructed wetlands (CWs) (biofilm-attachment-surface-CWs, packed bed-CWs and traditional-CWs) were assembled to comparatively evaluate their ability and mechanism to remove tri-(2-chloroisopropyl) phosphate (TCPP) under continuous flow operation. The removal rate (26%-28%) of TCPP in two types of CWs containing plants was twice as much as that in plant-free CWs in 6-month experiments, and TCPP showed a terminal accumulation phenomenon in Cyperus alternifolius with the order of accumulation of leaf>stem>root. The mass balance indicated that the contributions of filler and hydrophyte absorption to TCPP removal were less than 1%, but the transpiration of hydrophytes may make an important contribution (approximately 10%) to TCPP removal. Species in the genera Massilia, Denitratisoma and SM1A02 may be responsible for TCPP biodegradation. In addition, the effect of TCPP on the metabolic pathways and energy generation in the roots of C. alternifolius suggested that TCPP may be transported and utilized through cellular metabolism.
在本研究中，组装了三种类型的人工湿地（CWs）（生物膜附着表面人工湿地、填充床人工湿地和传统人工湿地），以比较评估它们在连续流运行条件下去除磷酸三（2-氯异丙基）酯（TCPP）的能力和机制。在为期6个月的实验中，两种含植物的人工湿地中TCPP的去除率（26%-28%）是无植物人工湿地的两倍，且TCPP在风车草中呈现出终端积累现象，积累顺序为叶>茎>根。质量平衡表明，填料和水生植物吸收对TCPP去除的贡献小于1%，但水生植物的蒸腾作用可能对TCPP去除做出重要贡献（约10%）。马赛菌属、脱氮芽孢杆菌属和SM1A02属中的物种可能负责TCPP的生物降解。此外，TCPP对风车草根中代谢途径和能量产生的影响表明，TCPP可能通过细胞代谢进行运输和利用。
