Enhanced Degradation of Safranin Dye Using Silver/Zinc Oxide Bimetallic Nanoparticles and Dye-Resistant Bacterial Strains from Contaminated Sites: A Comparative Study

IF 2.7 4区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
S. Shri Ranjini, Srimurali Sampath, Sumathi C. Samiappan, Anitha Arumugam, S. Uma Maheswari, Lakkakula Satish
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引用次数: 0

Abstract

Chemically stable organic dyes like Safranin are less likely to be biodegradable and hardly get removed from wastewater through conventional treatment methods. The photocatalytic degradation and bacterial degradation of safranin dye were thoroughly investigated in this study. Four various bacteria isolated from dye-contaminated soil were used for decolourization. Those isolates were characterized and subjected to degraded Safranin at optimized conditions. This study aims to prepare unique, cheap, eco-friendly and bi-metallic Ag/ZnO NPs for the degradation of safranin dye, an important component in textile wastewater. In pursuit of this objective, bi-metallic Ag/ZnO nanoparticles were fabricated for the first time using Plectranthus amboinicus leaf extracts. The FT-IR spectra showed the role of the functional groups in P.amboinicus for the formation of Ag/ZnO NPs such as routine compounds. The synthesized PA-Ag/ZnO nanoparticles exhibited a zeta potential of − 16.4 mV, indicating high stability. The UV-visible spectrum showed absorption peaks at 204.81 and 216.73 nm wavelengths. The obtained PA-Ag/ZnO NPs were investigated as a nanocatalyst for safranin degradation. Its phytochemicals influenced the shape, size, stability, surface area, surface energy and photocatalytic activity. To confirm the formation of Ag/ZnO NPs, FT-IR, XRD, UV-Vis spectroscopy, zeta potential, SEM and TEM were performed. The photocatalytic degradation of Safranin by PA-Ag/ZnO nanoparticles was carried out at optimized conditions, and the degradation rate of 94% at 10mg concentration was observed. After optimizing degradation conditions, comparative degradation studies between the PA-Ag/ZnO nanoparticles and bacteria were performed using GC-MS analysis. These findings represent that synthesized Ag/ZnO nanoparticles using P. amboinicus will be used in wastewater treatment.

Graphical Abstract

Abstract Image

氧化银/氧化锌双金属纳米颗粒与污染部位耐染菌株增强红花色素降解的比较研究
化学性质稳定的有机染料,如红花色素,不太可能被生物降解,很难通过传统的处理方法从废水中去除。对红花色素的光催化降解和细菌降解进行了深入的研究。从染料污染的土壤中分离出四种不同的细菌进行脱色。对这些分离物进行了表征,并在优化的条件下对红花苷进行了降解。本研究旨在制备独特、廉价、环保的双金属Ag/ZnO纳米粒子,用于降解纺织废水中的重要成分红花色素。为了实现这一目标,我们首次以双金属银/氧化锌纳米颗粒为原料,制备了银/氧化锌纳米颗粒。FT-IR光谱显示了P.amboinicus中官能团对Ag/ZnO NPs(如常规化合物)形成的作用。合成的PA-Ag/ZnO纳米粒子具有−16.4 mV的zeta电位,具有较高的稳定性。紫外可见光谱在204.81和216.73 nm处出现吸收峰。研究了制备的PA-Ag/ZnO纳米颗粒作为红花素降解的纳米催化剂。其植物化学成分影响其形状、大小、稳定性、表面积、表面能和光催化活性。通过FT-IR、XRD、UV-Vis、zeta电位、SEM和TEM等测试手段证实了Ag/ZnO纳米粒子的形成。在优化条件下,PA-Ag/ZnO纳米颗粒光催化降解红花红素,在10mg浓度下,降解率可达94%。优化降解条件后,采用气相色谱-质谱分析对PA-Ag/ZnO纳米颗粒与细菌的降解进行了比较研究。这些研究结果表明,利用P. amboinicus合成的Ag/ZnO纳米颗粒将用于废水处理。图形抽象
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来源期刊
Journal of Cluster Science
Journal of Cluster Science 化学-无机化学与核化学
CiteScore
6.70
自引率
0.00%
发文量
166
审稿时长
3 months
期刊介绍: The journal publishes the following types of papers: (a) original and important research; (b) authoritative comprehensive reviews or short overviews of topics of current interest; (c) brief but urgent communications on new significant research; and (d) commentaries intended to foster the exchange of innovative or provocative ideas, and to encourage dialogue, amongst researchers working in different cluster disciplines.
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