Sustainable approach with enhanced removal performance of organic pollutant for wastewater treatment by ultrasonically regenerated mesoporous nickel oxide nanoparticles

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Environmental Science and Technology Pub Date : 2024-09-11 DOI:10.1007/s13762-024-06023-7

M. Darbandi, A. Moghaddasfar, M. Eynollahi, A. Mehrdad

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Abstract

The nickel oxide nanoparticles (NPs) were synthesized using the solvothermal method in the oleic acid to remove congo red via an adsorption process. Furthermore, for the first time, in this study subsequently regeneration of deactivated adsorbent by low-energy ultrasound waves as an inventive technique was investigated. The morphology, porosity, and crystallinity of the as-synthesized NPs were investigated by transmission electron microscopy (TEM), Scanning electron microscope (SEM), Brunauer–Emmett–Teller (BET), and X-ray diffraction (XRD) techniques. Congo red, a water-soluble azo dye, is adsorbed by nickel oxide nanoparticles, reaching about 83.20% adsorption within two hours with a pseudo-first-order rate constant of 0.0099 min⁻¹. In the regeneration process, the nanoparticles regenerated by low-frequency ultrasound waves up to 94.35% within 35 min. The obtained data shows that the amount of regenerated nanoparticles increased with the intensity of ultrasonic irradiation. Most importantly, it can be recycled by ultrasound irradiation, which retains high performance in 3 cycles, proving its promising application for different environmental decontamination.

Graphical abstract

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利用超声再生介孔氧化镍纳米颗粒提高废水处理中有机污染物去除性能的可持续方法

本研究采用溶热法在油酸中合成了氧化镍纳米粒子（NPs），通过吸附过程去除刚果红。此外，本研究还首次研究了低能超声波再生失活吸附剂这一创新技术。研究人员利用透射电子显微镜（TEM）、扫描电子显微镜（SEM）、BET（Brunauer-Emmett-Teller）和 X 射线衍射（XRD）技术对合成的 NPs 的形态、孔隙率和结晶度进行了研究。氧化镍纳米粒子对水溶性偶氮染料刚果红的吸附率在两小时内达到 83.20%，伪一阶速率常数为 0.0099 min-1。在再生过程中，通过低频超声波再生的纳米颗粒在 35 分钟内的吸附率高达 94.35%。所得数据表明，再生纳米粒子的数量随超声波照射强度的增加而增加。最重要的是，它可以通过超声波辐照进行再生，并在 3 次循环中保持高性能，这证明了它在不同环境净化中的应用前景。

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来源期刊

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.