Grafted Amberlite 200C Resin for Enhanced Salicylic Acid Adsorption

IF 0.5 4区 化学 Q4 CHEMISTRY, ANALYTICAL
Fairouz Saad Saoud, Yassine Berbar, Mourad Amara
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引用次数: 0

Abstract

Removing relatively concentrated salicylic acid (SA) from pharmaceutical aqueous waste was performed using unmodified and modified commercial cationic exchange resin (Amberlite 200C). The modification of the resin involved grafting functional molecules onto the aromatic ring through classical organic reactions or by irreversible adsorption into the resin’s structure. The nitro group (\({\text{NO}}_{2}^{ + }\)) was synthesized by combining nitric and sulfuric acids and then attached to the resin matrix through nitration. Meanwhile, 2,4-dinitrophenyl hydrazine (DNPH), tributyl phosphate (TBP), and ammonium (\({\text{NH}}_{4}^{ + }\) ) were irreversibly adsorbed onto the resin matrix via immersion. Consequently, the unmodified resin achieved a 21% elimination of the initial SA, whereas modified resins significantly increased the elimination yield. Specifically, \({\text{NH}}_{4}^{ + }\) and DNPH-modified resins achieved SA elimination rates of 51.94 and 41.5%, respectively. However, the use of TBP and \({\text{NO}}_{2}^{ + }\) modified resins resulted in negligible SA removal. The optimal conditions for operation were determined to be: pH 5.5, temperature 21°C, and a contact time of 20 min.

Abstract Image

接枝 Amberlite 200C 树脂可增强水杨酸吸附性
使用未经改性和改性的商用阳离子交换树脂(Amberlite 200C)从制药废水中去除浓度相对较高的水杨酸(SA)。树脂的改性包括通过经典的有机反应将功能分子接枝到芳香环上,或通过不可逆的吸附作用将功能分子吸附到树脂的结构中。硝基(\({text{NO}}_{2}^{ + }\) 是通过硝酸和硫酸的结合合成的,然后通过硝化作用连接到树脂基体上。同时,2,4-二硝基苯肼(DNPH)、磷酸三丁酯(TBP)和铵(({text{NH}}_{4}^{ + }\) 通过浸泡不可逆地吸附到树脂基体上。因此,未改性树脂对初始 SA 的消除率为 21%,而改性树脂则显著提高了消除率。具体来说,\({text{NH}}_{4}^{ + }\) 和 DNPH 改性树脂的 SA 消除率分别达到了 51.94% 和 41.5%。然而,使用 TBP 和 \({\text{NO}}_{2}^{ + }\) 改性树脂去除的 SA 微乎其微。确定的最佳操作条件为:pH 值 5.5、温度 21°C、接触时间 20 分钟。
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来源期刊
Journal of Water Chemistry and Technology
Journal of Water Chemistry and Technology CHEMISTRY, APPLIED-CHEMISTRY, ANALYTICAL
自引率
0.00%
发文量
51
审稿时长
>12 weeks
期刊介绍: Journal of Water Chemistry and Technology focuses on water and wastewater treatment, water pollution monitoring, water purification, and similar topics. The journal publishes original scientific theoretical and experimental articles in the following sections: new developments in the science of water; theoretical principles of water treatment and technology; physical chemistry of water treatment processes; analytical water chemistry; analysis of natural and waste waters; water treatment technology and demineralization of water; biological methods of water treatment; and also solicited critical reviews summarizing the latest findings. The journal welcomes manuscripts from all countries in the English or Ukrainian language. All manuscripts are peer-reviewed.
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