Micropollutant Research Centre (MPRC), Department of Water and Environmental Engineering, Faculty of Civil Engineering & Built Environment, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia.
Micropollutant Research Centre (MPRC), Department of Water and Environmental Engineering, Faculty of Civil Engineering & Built Environment, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia.
Chemosphere. 2021 Oct;281:130661. doi: 10.1016/j.chemosphere.2021.130661. Epub 2021 May 5.
Textile industry is one of the most environmental unfriendly industrial processes due to the massive generation of colored wastewater contaminated with dyes and other chemical auxiliaries. These contaminants are known to have undesirable consequences to ecosystem. The present study investigated the best operating parameters for the removal of congo red (CR, as the model for dye wastewater) by orange peels extract biosynthesized zinc oxide nanoparticles (ZnO NPs) via photocatalysis in an aqueous solution. The response surface methodology (RSM) with ZnO NPs loadings (0.05-0.20 g), pH (3.00-11.00), and initial CR concentration (5-20 ppm) were used for the optimization process. The applicability of ZnO NPs in the dye wastewater treatment was evaluated based on the techno-economic analysis (TEA). ZnO NPs exhibited hexagonal wurtzite structure with = C-H, C-O, -C-O-C, CC, O-H as the main functional groups. The maximum degradation of CR was more than 96% with 0.171 g of ZnO NPs, at pH 6.43 and 5 ppm of CR and 90% of the R coefficient. The specific cost of ZnO NPs production is USD 20.25 per kg. These findings indicated that the biosynthesized ZnO NPs with orange peels extract provides alternative method for treating dye wastewater.
纺织工业是对环境最不友好的工业过程之一，因为大量产生的有色废水受到染料和其他化学助剂的污染。这些污染物已知对生态系统有不良后果。本研究通过光催化法在水溶液中用橙皮提取物生物合成氧化锌纳米粒子（ZnO NPs）来研究去除刚果红（CR，作为染料废水的模型）的最佳操作参数。使用 ZnO NPs 负载量（0.05-0.20 g）、pH（3.00-11.00）和初始 CR 浓度（5-20 ppm）的响应面法（RSM）进行优化过程。根据技术经济分析（TEA）评估 ZnO NPs 在染料废水处理中的适用性。ZnO NPs 表现出六方纤锌矿结构，主要官能团为 =C-H、C-O、-C-O-C、CC、O-H。在 pH 值为 6.43、CR 浓度为 5 ppm 和 R 系数为 90%的条件下，用 0.171 g ZnO NPs 处理，CR 的最大降解率超过 96%。ZnO NPs 生产成本为每公斤 20.25 美元。这些发现表明，用橙皮提取物生物合成的 ZnO NPs 为处理染料废水提供了一种替代方法。
