超声辅助合成的 FeAcC 在高级氧化-一体化流化床反应器中吸附和氧化去除酚酞

IF 4.3 4区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Water Reuse Pub Date : 2024-07-08 DOI:10.2166/wrd.2024.028
Gopal Italiya, S. Subramanian
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引用次数: 0

摘要

由于添加了传统水处理工艺无法解决的有害化学物质,环境水源正面临着越来越大的威胁。为了解决这一问题,本研究旨在合成声波辅助铁改性活性炭-壳聚糖(FeAcC)复合材料,并构建实验室规模的臭氧集成流化床反应器(FBR)来消除酚酞(php)。经过 120 分钟的培养,在 pH 值为 4、吸附剂用量为 0.5 g L-1 的条件下,该吸附剂对酚酞的吸附量为 27.28 mg g-1。利用等温线和动力学模型确定了吸附效果和机制。研究调查了不同因素(包括初始浓度、FeAcC 的重复使用、循环流速和水力停留时间 (HRT))对php 去除效率的影响。在 400 毫克/小时的臭氧浓度下,以 1.5 升/分钟的再循环流速(间歇式 FBR)和 70 分钟的水力停留时间(连续式 FBR)运行 20 分钟后,观察到最佳去除率约为 95%。采用中心复合设计的响应面方法对实验参数进行了优化,以提高php去除率。该研究成果的大规模应用将为新出现的有毒有机污染物的净水处理工艺增添新的技术手段。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Adsorptive and oxidative removal of phenolphthalein by sono-assisted synthesized FeAcC in advanced oxidation-integrated fluidized bed reactor
Environmental water sources are under increasing threat due to the addition of harmful chemicals that are not addressed by conventional water treatment processes. To work on this concern, the current study aimed to synthesize sono-assisted Fe-modified activated carbon–chitosan (FeAcC) composite and construct a laboratory-scale ozone-integrated fluidized bed reactor (FBR) to eliminate phenolphthalein (php). After 120 min of incubation, the adsorbent demonstrated a 27.28 mg g−1 of php adsorption capacity at a pH of 4 with 0.5 g L−1 of adsorbent dosage. The adsorption efficacy and mechanism were defined using isotherm and kinetic models. The study investigated the impact of different factors, including initial concentration, reuse of FeAcC, recirculation flow rate, and hydraulic retention time (HRT), on the efficiency of php removal. The optimum removal efficiency was observed at approximately 95% after 20 min of operation at 1.5 L min−1 recirculation flow rate (batch FBR) and 70 min of HRT (continuous FBR) under a 400 mg h−1 ozonation rate. Experimental parameters were optimized using response surface methodology with central composite design to improve php removal. The large-scale implementation of the findings in the future can be a step for adding new technology for clean water treatment processes for emerging toxic organic pollutants.
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来源期刊
Water Reuse
Water Reuse Multiple-
CiteScore
6.20
自引率
8.90%
发文量
0
审稿时长
7 weeks
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