Selective/simultaneous batch adsorption of binary textile dyes using amorphous perlite powder: aspects of central composite design optimization and mechanisms

IF 3 4区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL

Journal of Environmental Health Science and Engineering Pub Date : 2023-06-29 DOI:10.1007/s40201-023-00870-1

Wafa Sassi, Radhia Msaadi, Najeh Ardhaoui, Salah Ammar, Ayman Nafady

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引用次数: 2

Abstract

Herein, the selectivity/simultaneously adsorption associated with Congo Red (CR) and Methylene Blue (MB) has been efficiently undertaken via amorphous perlite. Under optimum conditions of 38 min, 96 mg/L and 312°K for the contact time, the dye concentration, and the temperature, respectively, the optimization study using central composite design (CCD) matrix gave rise to high adsorption yields of 82.22 and 96.65% for CR and MB, respectively. Importantly, kinetic and isotherm studies attested that the batch adsorption occurs as intra-diffusional mass transport onto porous material. The obtained thermodynamic parameters are indicative of an endothermic/spontaneous physisorption process. Whereas SEM–EDS characterization revealed the superficial adsorption process of both CR and MB onto perlite. In addition, the FTIR analysis suggests that the adsorption process disrupted the short-range compounds order of perlite samples, revealing the marked crystallinity decrease of the adsorbent after adsorption. Finally, application of these optimum conditions tests on real industrial wastewater show that the adsorption was simultaneous at neutral pH and at 312°K, whereas CR and MB can be selectively adsorbed at pH 4 and 9, respectively.

Graphical abstract

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非晶珍珠岩粉末选择性/同时间歇吸附二元纺织染料:中心复合材料设计优化及机理

本文通过无定形珍珠岩有效地进行了刚果红（CR）和亚甲基蓝（MB）的选择性/同时吸附。在接触时间、染料浓度和温度分别为38min、96mg/L和312°K的最佳条件下，使用中心复合设计（CCD）基质进行的优化研究对CR和MB的吸附率分别为82.22%和96.65%。重要的是，动力学和等温线研究证明，间歇吸附是作为扩散内质量传输到多孔材料上而发生的。所获得的热力学参数指示吸热/自发物理吸附过程。SEM–EDS表征揭示了CR和MB在珍珠岩上的表面吸附过程。此外，FTIR分析表明，吸附过程破坏了珍珠岩样品的短程化合物顺序，表明吸附剂在吸附后结晶度显著下降。最后，这些最佳条件在实际工业废水中的应用试验表明，在中性pH和312°K下，吸附是同时进行的，而在pH 4和9下，CR和MB可以分别被选择性吸附。图形摘要

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来源期刊

Journal of Environmental Health Science and Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES

CiteScore

7.50

自引率

2.90%

发文量

期刊介绍： Journal of Environmental Health Science & Engineering is a peer-reviewed journal presenting timely research on all aspects of environmental health science, engineering and management. A broad outline of the journal''s scope includes: -Water pollution and treatment -Wastewater treatment and reuse -Air control -Soil remediation -Noise and radiation control -Environmental biotechnology and nanotechnology -Food safety and hygiene