Synergistic removal of cadmium and organic matter by a microalgae-endophyte symbiotic system (MESS): An approach to improve the application potential of plant-derived biosorbents
Synergistic removal of cadmium and organic matter by a microalgae-endophyte symbiotic system (MESS): An approach to improve the application potential of plant-derived biosorbents
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微藻-内生菌共生系统（MESS）协同去除镉和有机物：提高植物源生物吸附剂应用潜力的方法
DOI：
10.1016/j.envpol.2020.114177
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发表时间：
2020
影响因子：
8.9
通讯作者：
Zeng Guisheng
中科院分区：
文献类型：
--
作者：
Li Mingming;Xiao Xiao;Wang Shipei;Zhang Xujing;Li Junjie;Pavlostathis Spyros G.;Luo Xubiao;Luo Shenglian;Zeng Guisheng
植物源材料作为环境友好型生物吸附剂去除废水中的重金属已得到广泛研究。然而，植物源性生物吸附剂引起的化学需氧量（COD）增加在以往研究中未被考虑。本研究以水葫芦为生物吸附剂去除废水中的镉。Cd（II）被生物吸附剂去除约66%，最大生物吸附量（qmax）为21.6 mg g−1。但在此过程中，滤液的COD从0增加到292 mg L−1。随后，对内生菌、微藻和微藻-内生菌共生系统（MESS）同时去除Cd（II）和COD的效果进行了评估。在这三种系统中，MESS的性能最好。接种3 d后，总Cd（II）去除率提高至99.2%，COD去除率降至77 mg L−1。本研究为植物源性生物吸附剂与微藻和内生菌结合有效处理含重金属废水提供了新的思路。
Plant-derived materials as environmentally friendly biosorbents to remove heavy metals from wastewater have been extensively studied. However, the chemical oxygen demand (COD) increase caused by the plant-derived biosorbent has not been considered previously. In this study, water hyacinth was used as biosorbent to remove Cd(II) from wastewater. About 66% of Cd(II) was removed by the biosorbent with a maximum biosorption capacity (qmax) of 21.6 mg g−1. However, the COD of the filtrate increased from 0 to 292 mg L−1during this process. Subsequently, endophytes, microalgae and the microalgae-endophyte symbiotic system (MESS) were assessed for the simultaneous Cd(II) and COD removal. Among these three systems, the MESS achieved the best performance. After 3 d of inoculation, the extent of total Cd(II) removal increased to 99.2% while COD decreased to 77 mg L−1. This study provides a new insight into the application of a plant-derived biosorbent in combination with microalgae and endophytes for the effective treatment of heavy metal-bearing wastewater.