Microbial cells immobilized on natural biomatrix as a new potential ecofriendly biosorbent for the biotreatment of reactive dye contamination
Microbial cells immobilized on natural biomatrix as a new potential ecofriendly biosorbent for the biotreatment of reactive dye contamination
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DOI：
10.1016/j.jwpe.2020.101731
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发表时间：
2021-02-01
影响因子：
7
通讯作者：
Akar, Tamer
中科院分区：
文献类型：
--
作者：
Celik, Sema;Duman, Nurgul;Akar, Tamer
水环境中的染料污染是当今主要的环境和公众健康问题之一。生物吸附去除染料的生物复合材料，最近出现了一个很好的潜力。为此，本研究采用被动固定化法制备了一种新型的固定化悬铃木叶组织微生物细胞。研究了在不同条件（包括pH值、生物材料用量、接触时间和流速）下其对活性红198（RR 198）和活性黄2（RY 2）染料的生物去除潜力。NSPOL对RR 198和RY 2的吸附是一个快速的过程。两种染料的生物吸附数据预测与伪二级动力学模型。脱色模式符合Langmuir等温模型。记录的最大单层生物吸附容量分别为51.12和37.59 mg g（-1）的RY 2和RR 198。红外光谱和扫描电镜分析表明，染料的生物吸附到生物复合材料。再生实验表明，NSPOL的生物吸附性能是一致的RR 198和RY 2去除高达5倍。经过5次生物吸附-解吸循环后，NSPOL对RY 2染料的再生效率仍高于98%。总的来说，批处理和柱研究表明，建议的生物复合材料可能是一个很好的和经济的替代去除活性偶氮染料污染的水生介质。生物吸附去除染料的可能机制可能是氢键、π-π和静电相互作用。
Dye pollution in the aquatic environment is one of the main environmental and public health issue nowadays. Biosorptive removal of such dyes by biocomposite materials have recently emerged a good potential. For this purpose a novel microbial cell-immobilized Platanus orientalis leaf tissue (NSPOL) was prepared through a passive immobilization, in this study. Its bioremoval potential was investigated for Reactive Red 198 (RR198) and Reactive Yellow 2 (RY2) dyes at different conditions, including pH, biomaterial dosage, contact time and flow rate. Biosorption of RR198 and RY2 by NSPOL was found to be a fast process. Biosorption data were well predicted with the pseudo-second-order kinetic model for both dyes. Decolorization patterns fitted well with Langmuir isotherm model. Maximum monolayer biosorption capacities were recorded as 51.12 and 37.59 mg g(-1) for RY2 and RR198, respectively. IR and SEM analysis revealed the biosorption of dyes onto biocomposite. Regeneration experiments showed that the biosorption performance of NSPOL was consistent towards RR198 and RY2 removal upto 5 recycles. After 5 biosorption-desorption cycles, the regeneration efficiency of NSPOL was still higher than 98 % for RY2 dye. Overall, batch and column studies indicated that suggested biocomposite may be a good and economic alternative for the removal of reactive azo dye contamination from aquatic media. Possible mechanism for biosorptive dye removal may be H-bonding, pi-pi and electrostatic interactions.