In situ synthesis of porous metal-organic frameworks NH2-UiO-66 on tea stem biochar and application in odours adsorption

Xiaorong Dai; Leiping Wang; Zun Man; Yuxuan He; Wei Wang; Fangcong Lin; Junjie Zhu; Dezhao Liu; Hang Xiao; Kaiying Wang

doi:10.1016/j.envpol.2024.124168

In situ synthesis of porous metal-organic frameworks NH₂-UiO-66 on tea stem biochar and application in odours adsorption

Environ Pollut. 2024 May 16:353:124168. doi: 10.1016/j.envpol.2024.124168. Online ahead of print.

Authors

Xiaorong Dai¹, Leiping Wang², Zun Man³, Yuxuan He⁴, Wei Wang⁴, Fangcong Lin¹, Junjie Zhu¹, Dezhao Liu³, Hang Xiao⁴, Kaiying Wang³

Affiliations

¹ College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, 315100, China.
² Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo (Beilun) Zhongke Haixi Industrial Technology Innovation Center, Ningbo, 315800, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address: lpwang@iue.ac.cn.
³ Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture and Rural Affairs, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.
⁴ Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo (Beilun) Zhongke Haixi Industrial Technology Innovation Center, Ningbo, 315800, China.

PMID: 38761878
DOI: 10.1016/j.envpol.2024.124168

Abstract

Multiple odour nuisance in livestock farming is a notorious problem that has a significant impact on the living environment of surrounding communities. Adsorbents based on metal-organic framework (MOF) materials show great promise for controlling odour pollution, as they offer a high specific surface area, a controllable structure and an abundance of active sites. However, the MOF formation process is prone to problems such as pore clogging or collapse and reduced porosity, which limits its further application. In this study, a series of odour adsorbents were prepared by in situ growth of NH₂-UiO-66 on tea stem biochar (TSBC) using a hydrothermal method and named UiO (Zr)-TSBC_x. The physical and chemical properties and composition of UiO (Zr)-TSBC_x have been systematically characterized using SEM, TEM, XRD, FT-IR, N₂ adsorption-desorption and XPS. The release of odours from the pig farm effluent was monitored using in-situ continuous Proton-Transfer-Reaction Mass Spectrometry (PTR-MS), and the obtained primary compositions were tested for further adsorption. In dynamic adsorption experiments focused on butyric acid, UiO (Zr)-TSBC₂ showed a high adsorption capacity of 3.99 × 10⁵ μg/g and exceptional structural stability. UiO (Zr)-TSBC₂ showed variable adsorption efficiencies for different odorous gases, with the best performance for the removal of ammonia, toluene and butyric acid. It also demonstrated the ability to rapidly mitigate instantaneous high concentrations of hydrogen sulfide (H₂S), methanethiol and toluene resulting from agitation. Additionally, based on the relationship between the adsorption amount and the structural characteristics of the adsorbent as well as the nature of the odours, a possible adsorption mechanism of UiO (Zr)-TSBC₂ for a variety of odours released from pig farm effluent was proposed. This work demonstrates a novel approach to promote deodorization applications in livestock and poultry farming environments by the in-situ growth of NH₂-UiO-66 on biochar prepared from tea stem.

Keywords: Adsorption; Biochar; Control; Odours; Zr-MOF.