中文关键词生物炭人工湿地净化能力湿地植物溶解氧 英文关键词biocharconstructed wetlandspurification capacitywetland plantsdissolved oxygen

作者	单位	E-mail
徐德福	大气环境与装备技术协同创新中心, 南京 210044 南京信息工程大学环境科学与工程学院, 南京 210044 江苏省大气环境监测与污染控制高技术研究重点实验室, 南京 210044	defuxu1@163.com
潘潜澄	大气环境与装备技术协同创新中心, 南京 210044 南京信息工程大学环境科学与工程学院, 南京 210044
李映雪	大气环境与装备技术协同创新中心, 南京 210044
陈晓艺	大气环境与装备技术协同创新中心, 南京 210044 南京信息工程大学环境科学与工程学院, 南京 210044
王佳俊	大气环境与装备技术协同创新中心, 南京 210044 南京信息工程大学环境科学与工程学院, 南京 210044
周磊	大气环境与装备技术协同创新中心, 南京 210044 南京信息工程大学环境科学与工程学院, 南京 210044

中文摘要 构建了菖蒲人工湿地，通过向人工湿地中加入小麦秸秆生物炭、芦苇生物炭及木屑生物炭以研究生物炭对人工湿地中植物根系形态、溶解氧及净化能力的影响.结果表明，加入3种生物炭能显著增加人工湿地中菖蒲根的总根长、总投影面积、总体积、总表面积、根尖数、分枝数和根干重以及人工湿地中的溶解氧含量（P<0.05）；其中加入木屑生物炭后，菖蒲根的根长、投影面积、表面积、总体积、根尖数、分枝数和根干重分别增加了96.1%、106.2%、185.6%、172.5%、75.3%、121.5%和84.9%.加入生物炭后，菖蒲根系形态与人工湿地中溶解氧含量、总氮去除率、总磷去除率和COD去除率间均显著正相关（P<0.05）.在水力负荷0.022 m³·（m²·d）^-1时，加入木屑生物炭显著增加了人工湿地对总氮、总磷和COD的去除率（P<0.05）.木屑炭有效地促进了人工湿地中植物根系的生长，增加了人工湿地溶解氧含量，提高了人工湿地的净化能力. 英文摘要 A constructed wetland with Acorus calamus L. was built. Straw biochar, reed biochar, and sawdust biochar was added into the constructed wetland individually to study the effect of different biochars on the root morphology, dissolved oxygen, and purification ability of the constructed wetland. The results show that the total root length, total projection area, total volume, total surface area, root number, branch number, and root dry weight of Acorus calamus L. significantly increased when all three kinds of biochar were added into the constructed wetland (P<0.05). Similarly, adding the biochars into the constructed wetland also significantly increased dissolved oxygen content in the wetland (P<0.05). Addition of sawdust biochar into the constructed wetland increased the root length, projection area, surface area, total volume, number of root tips, number of branches, and root dry weight of Acorus calamus L. by 96.1%, 106.2%, 185.6%, 172.5%, 75.3%, 121.6%, and 84.9%, respectively. After adding biochars into the constructed wetland, the root morphology of Acorus calamus L. and dissolved oxygen content was significantly correlated with removal rate of TN, TP, and COD, respectively. Addition of sawdust biochar into the constructed wetland significantly increased the removal rates of total nitrogen, total phosphorus, and COD when the hydraulic load was 0.022 m³·(m²·d)^-1 (P<0.05). These results suggested that the addition of sawdust biochar to the constructed wetland increased the root growth of Acorus calamus L. and enhanced dissolved oxygen content, resulting in purification capacity of the constructed wetland.

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