Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China.
Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China; National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resources Utilization, Nanchang Hangkong University, Nanchang 330063, PR China.
Environ Pollut. 2020 Jun;261:114177. doi: 10.1016/j.envpol.2020.114177. Epub 2020 Feb 13.
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 (q) of 21.6 mg g. However, the COD of the filtrate increased from 0 to 292 mg L during 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. 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.
植物衍生材料作为一种从废水中去除重金属的环保生物吸附剂已经得到了广泛的研究。然而，以前没有考虑到植物衍生生物吸附剂引起的化学需氧量（COD）增加。在这项研究中，水葫芦被用作生物吸附剂从废水中去除 Cd(II)。生物吸附剂可去除约 66%的 Cd(II)，最大生物吸附容量（q）为 21.6 mg g。然而，在此过程中，滤液的 COD 从 0 增加到 292 mg L。随后，内生菌、微藻和微藻-内生菌共生系统（MESS）被评估用于同时去除 Cd(II)和 COD。在这三种系统中，MESS 表现出最好的性能。接种 3 天后，总 Cd(II)去除率增加到 99.2%，而 COD 降低到 77 mg L。这项研究为将植物衍生生物吸附剂与微藻和内生菌结合应用于有效处理含重金属废水提供了新的见解。
