Li Xue, Wang Xinjie, Su Junfeng, Liu Yu, Zhang Ying, Li Xuan
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
J Hazard Mater. 2025 Aug 15;494:138690. doi: 10.1016/j.jhazmat.2025.138690. Epub 2025 May 20.
Currently, treating industrial wastewater with complex components and difficult-to-degrade pollutants has become a focal point for research. In this study, sodium alginate (SA), polyvinyl alcohol (PVA), and shell powder (SP) were used as a carrier backbone to embed ferric cobalt-modified biochar (FCBC), exogenous acyl homoserine lactone-6 (AHLs-6), and the salt-tolerant strain Stutzerimonas sp. ZW5, resulting in the preparation of immobilized microbial carriers. Experimental results demonstrated that, under optimal operating conditions, the bioreactor achieved removal efficiencies of 97.11 % for nitrate (NO-N), 81.20 % for calcium (Ca), 93.22 % for chemical oxygen demand (COD), 91.05 % for phosphorus (PO-P), 98.57 % for copper (Cu), and 96.16 % for bisphenol A (BPA). The rough surface and numerous functional groups of the reactor packing effectively adsorbed BPA and Cu, thereby reducing the inhibitory effects of these pollutants on microbial metabolic activity. In addition, FCBC provides mass transfer channels and active sites to enhance electron transfer. The introduction of exogenous AHLs-6 markedly increased the abundance of functional microbial communities and the activity of key enzymes by regulating microbial metabolism, thus improving the removal efficiency of complex pollutants. This research offers new perspectives on treating complex industrial wastewater.
目前，处理成分复杂且含有难降解污染物的工业废水已成为研究的焦点。在本研究中，海藻酸钠（SA）、聚乙烯醇（PVA）和贝壳粉（SP）被用作载体骨架，包埋铁钴改性生物炭（FCBC）、外源酰基高丝氨酸内酯-6（AHLs-6）和耐盐菌株施氏假单胞菌ZW5，从而制备固定化微生物载体。实验结果表明，在最佳操作条件下，生物反应器对硝酸盐（NO-N）的去除率达到97.11%，对钙（Ca）的去除率为81.20%，对化学需氧量（COD）的去除率为93.22%，对磷（PO-P）的去除率为91.05%，对铜（Cu）的去除率为98.57%，对双酚A（BPA）的去除率为96.16%。反应器填料的粗糙表面和众多官能团有效吸附了双酚A和铜，从而降低了这些污染物对微生物代谢活性的抑制作用。此外，FCBC提供传质通道和活性位点以增强电子传递。外源AHLs-6的引入通过调节微生物代谢显著增加了功能微生物群落的丰度和关键酶的活性，从而提高了对复杂污染物的去除效率。本研究为处理复杂工业废水提供了新的视角。
