Department of Structure and Environmental Engineering , University of Agriculture Faisalabad , Faisalabad , Punjab 38040 , Pakistan.
Department of Environmental Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education , Peking University , Beijing 100871 , China.
Environ Sci Technol. 2019 Feb 19;53(4):2161-2170. doi: 10.1021/acs.est.8b05866. Epub 2019 Feb 5.
The effective treatment of industrial wastewater to protect freshwater reserves for the survival of life is a primary focus of current research. Herein, a multicomponent Eleocharis-manganese peroxidase enzyme (Eleocharis@MnPE) layered hybrid with high surface area (1200 m/m), with a strong synergistic adsorption and catalytic biodegradation (SACB), has been developed through a facile method. A combination of outer porous (Eleocharis) and inner catalytically active (MnPE) components of the hybrid resulted in highly efficient SACB system, evidenced by high removal rate of 15 kg m day (100%) and complete degradation of toxic Orange II (OR) azo dye into nontoxic products (gases and weak acids). The Eleocharis@MnPE layered hybrid efficiently degraded both OR in synthetic wastewater and also other azo dyes (red, pink, and yellow dyes) present in three different textile industrial effluents. For the industrial effluents, these were evidenced by the color disappearance and reduction in biological oxygen demand (BOD), chemical oxygen demand (COD), and total organic carbon (TOC) of up to 97%, 92%, and 76%, respectively. Furthermore, reduced toxicity of treated wastewater was confirmed by decreased cell toxicity to 0.1%-1% and increased cell viability to 90%. We believe that designing a hybrid system with strong ability of SACB could be highly effective for industrial-scale treatment of wastewater.
有效处理工业废水以保护淡水储备，从而保障生命的生存，这是当前研究的重点。在此，我们通过一种简便的方法开发了一种具有高表面积（1200 m²/m³）的多组分菰-锰过氧化物酶复合酶（Eleocharis@MnPE）层状杂化物，具有很强的协同吸附和催化生物降解（SACB）能力。杂化物的外多孔（菰）和内催化活性（MnPE）组件的组合导致了高效的 SACB 系统，其表现为去除率高达 15 kg m day（100%）和完全将有毒的橙色 II（OR）偶氮染料降解为无毒产物（气体和弱酸）。Eleocharis@MnPE 层状杂化物能够有效地降解合成废水中的 OR 和其他三种不同纺织工业废水中存在的偶氮染料（红色、粉红色和黄色染料）。对于工业废水，这可以通过颜色消失和生物需氧量（BOD）、化学需氧量（COD）和总有机碳（TOC）的降低来证明，分别降低了 97%、92%和 76%。此外，处理后废水的毒性降低，细胞毒性降低到 0.1%-1%，细胞活力增加到 90%。我们相信，设计具有强 SACB 能力的杂化系统对于工业规模的废水处理可能非常有效。
