中文关键词生态浮床AM真菌含盐废水溶解性总盐(TDS)盐离子 英文关键词ecological floating bedarbuscular mycorrhizal(AM) fungisaline wastewatertotal dissolved solids (TDS)salt ions

作者	单位	E-mail
窦文清	中煤鄂尔多斯能源化工有限公司, 鄂尔多斯 017300	1983873632@qq.com
何皓	环境保护部环境工程评估中心, 北京 100012	1983873632@qq.com
宋文萍	中煤鄂尔多斯能源化工有限公司, 鄂尔多斯 017300
王曙光	北京化工大学化工学院环境科学与工程系, 北京 100029	shgwang2013@126.com
戴东伟	北京化工大学化工学院环境科学与工程系, 北京 100029

中文摘要 针对缺乏经济有效的中低盐废水脱盐技术问题，本试验利用丛枝菌根（AM）真菌增强植物抗盐胁迫能力，搭建AM强化型生态浮床，既探索新的中低盐废水处理技术，又解决普通浮床植物耐盐胁迫能力差、除盐效率低的问题.结果表明，AM真菌（Glomus etunicatum）与浮床植物美人蕉（Canna indica L.）建立了良好的共生关系，且侵染不受盐胁迫的影响.接种AM真菌提高了生态浮床处理含盐废水的能力，21 d内TDS、COD、TN和TP的去除率分别达到了36.1%、74.4%、57.6%和59.1%，比未接种AM真菌的普通生态浮床分别提高了79.2%、36.4%、32.7%和37.6%.从具体盐离子来看，21 d内水体中Na、K、Ca和Mg离子的去除率分别达到了34.4%、61.3%、57.4%和51.9%，相比未接种AM真菌的普通生态浮床分别提高了11.4%、37.1%、18.3%和24.6%.从植物对盐的吸收来看，AM的存在促进了美人蕉对Na离子的吸收和向地上部的转移，这可能是AM强化型生态浮床功能得到提升的主要原因之一.本研究表明AM真菌可增强生态浮床修复水体污染的能力，提高脱盐效率. 英文摘要 For the problem that few technologies can be directly used to treat wastewater with middle and low salt, in this study, arbuscular mycorrhizal (AM) fungi were used to enhance the tolerance of wetland plants to salt stress. Ecological floating beds (EFBs) enhanced with AM fungi were constructed to explore a new technology as well as to treat wastewater with low and medium salt content, but also to overcome the low tolerance to salt stress and low salt removal by EFB plants. Results showed that canna plants (Canna indica L.) were well colonized by AM fungi (Glomus etunicatum) and the mycorrhizal colonization rate was not affected by salt stress. Inoculation with AM fungi enhanced the ability of the EFBs to treat saline wastewater. After treatment by EFB with AM for 21 d, removal rates of total dissolved solids (TDS), chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) were 36.1%, 74.4%, 57.6%, and 59.1%, respectively, which were higher by 79.2%, 36.4%, 32.7%, and 37.6% over those with treatment by EFB without AM, respectively. Removal rates of Na, K, Ca, and Mg were 34.4%, 61.3%, 57.4%, and 51.9% after 21 d of treatment by EFB with AM, which were higher by 11.4%, 37.1%, 18.3%, and 24.6%, respectively, than removal rates with treatment by EFB without AM, respectively. Plant sample analysis showed that AM increased the Na uptake of plants and Na transportation from root to shoot, and this may be the reason that AM enhanced the ability of the EFBs to treat saline wastewater. This study indicated that AM fungi can be used to improve the ability of EFB to remedy water pollution and increase salt removal efficiency.

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