Synthesis of CaCO3 supported nano zero-valent iron-nickel nanocomposite (nZVI-Ni@CaCO3) and its application for trichloroethylene removal in persulfate activated system

Ali Shan; Ayesha Idrees; Waqas Qamar Zaman; Ali Mohsin; Zain Abbas; Florian J Stadler; Shuguang Lyu

doi:10.1016/j.envres.2023.118050

Synthesis of CaCO₃ supported nano zero-valent iron-nickel nanocomposite (nZVI-Ni@CaCO₃) and its application for trichloroethylene removal in persulfate activated system

Environ Res. 2024 Mar 15:245:118050. doi: 10.1016/j.envres.2023.118050. Epub 2023 Dec 30.

Authors

Ali Shan¹, Ayesha Idrees², Waqas Qamar Zaman³, Ali Mohsin⁴, Zain Abbas⁵, Florian J Stadler⁶, Shuguang Lyu⁵

Affiliations

¹ College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Laboratory for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518055, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen ,518060, China.
² College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Laboratory for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518055, China.
³ Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences & Technology, Islamabad, 44000, Pakistan.
⁴ State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.
⁵ State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China.
⁶ College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Laboratory for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen, 518055, China. Electronic address: fjstadler@szu.edu.cn.

PMID: 38163542
DOI: 10.1016/j.envres.2023.118050

Abstract

Nano zero-valent (nZVI) based composite have been widely utilized in environmental remediation. However, the rapid agglomeration and quick deactivation of nZVI limited its application on large scale. In this work, CaCO₃ supported nZVI-Ni catalyst, namely nZVI-Ni@CaCO₃ was prepared and used for the efficient removal of trichloroethylene (TCE) in PS oxidation process. The successful disbursement of nZVI-Ni on CaCO₃ support material not only increased the surface area of nZVI-Ni@CaCO₃ (69.45 m²/g) with respect to CaCO₃ (5.92 m²/g) and bare nZVI (13.29 m²/g) but also improved the catalytic activity. XRD, XPS and FTIR analysis confirmed the successful formation of nZVI-Ni@CaCO₃ nanoparticles. The nZVI-Ni@CaCO₃ nanoparticles combined with PS had achieved complete removal of TCE (99.8%) with dosage of 36 mg/L and 1.34 mM respectively. These results showed that the use of CaCO₃ as support material for nZVI-Ni could have significant influence on contaminant removal process. Scavenging and EPR tests validated the existence of SO₄^•-, OH^• and O₂^•- radicals in PS/nZVI-Ni@CaCO₃ system and highlighted the dominant role of SO₄^•- radicals in TCE removal process. HCO₃^- ions and humic acid have shown adverse effect on TCE removal due to radical scavenging and buffering effect. Owing to improved catalytic activity and easy preparation, the nZVI-Ni@CaCO₃ nanoparticles could be served as an alternative strategy for environmental remediation.

Keywords: CaCO(3); Groundwater remediation; Persulfate; Trichloroethylene; nZVI-Ni.

MeSH terms

Iron
Nanocomposites*
Nickel
Trichloroethylene*
Water Pollutants, Chemical* / analysis

Substances

Trichloroethylene
Nickel
Iron
Water Pollutants, Chemical