阿拉伯树胶在臭氧氧化过程中的流变、热、结构和化学变化

IF 2.1 4区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL

Ozone: Science & Engineering Pub Date : 2022-08-07 DOI:10.1080/01919512.2022.2106185

Z. T. Özaslan, Ş. Ibanoğlu

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引用次数: 3

摘要

以6% (w/v)浓度的阿拉伯胶(GA)为样品，分别进行5、30和60 min的臭氧氧化处理，分别消耗0.0030、0.0125和0.0140 g /L的臭氧。臭氧化处理显著降低了GA悬浮液的粘度、流量和稠度指数(P < 0.05)。虽然GA样品的一般化学结构没有明显变化，但FTIR分析发现-OH弯曲的吸光度增加。臭氧氧化使样品的DSC峰温(292.0±0.1 ~ 281.0±0.9℃)和pH值(4.84±0.13 ~ 2.90±0.09)降低。臭氧化后样品的水溶性和吸水指数差异虽小但有统计学意义(P < 0.05)。臭氧化处理显著提高了赤霉素的酚类化合物和自由基清除能力(P < 0.05)。臭氧化是一种环境友好型的单元操作，改善GA的性能将为相关行业提供有价值的贡献。

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Rheological, Thermal, Structural, and Chemical Changes during Oxidation of Gum Arabic by Ozone

ABSTRACT Gum Arabic (GA) samples with 6% (w/v) concentration in water were ozonated for 5, 30, and 60 min, corresponding to 0.0030, 0.0125, and 0.0140 g consumed ozone/L, respectively. Ozonation steadily reduced the viscosity, flow, and consistency index of GA suspensions significantly (P < 0.05). Although no apparent changes were observed in the general chemical structure of GA samples, an increase in the absorbance of -OH bends was detected by FTIR analysis. DSC peak temperatures (292.0 ± 0.1 to 281.0 ± 0.9 °C) and pH values of samples (4.84 ± 0.13 to 2.90 ± 0.09) were decreased upon ozonation. Small but statistically significant differences (P < 0.05) were obtained for water solubility and water absorption index of samples after ozonation. Phenolic compounds and radical scavenging activities in GA were increased significantly (P < 0.05) by ozonation. Ozonation, which is an environmental-friendly unit operation, would offer valuable contributions to relevant industries with improved properties of GA.

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来源期刊

Ozone: Science & Engineering 环境科学-工程：环境

CiteScore

5.90

自引率

11.10%

发文量

审稿时长

2 months

期刊介绍： The only journal in the world that focuses on the technologies of ozone and related oxidation technologies, Ozone: Science and Engineering brings you quality original research, review papers, research notes, and case histories in each issue. Get the most up-to date results of basic, applied, and engineered research including: -Ozone generation and contacting- Treatment of drinking water- Analysis of ozone in gases and liquids- Treatment of wastewater and hazardous waste- Advanced oxidation processes- Treatment of emerging contaminants- Agri-Food applications- Process control of ozone systems- New applications for ozone (e.g. laundry applications, semiconductor applications)- Chemical synthesis. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees.