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Zhu Y, Cao Y, Fu B, Wang C, Shu S, Zhu P, Wang D, Xu H, Zhong N, Cai D. Waste milk humification product can be used as a slow release nano-fertilizer. Nat Commun 2024; 15:128. [PMID: 38167856 PMCID: PMC10761720 DOI: 10.1038/s41467-023-44422-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 12/13/2023] [Indexed: 01/05/2024] Open
Abstract
The demand for milk has increased globally, accompanied by an increase in waste milk. Here, we provide an artificial humification technology to recycle waste milk into an agricultural nano-fertilizer. We use KOH-activated persulfate to convert waste milk into fulvic-like acid and humic-like acid. We mix the product with attapulgite to obtain a slow-release nano fulvic-like acid fertilizer. We apply this nano-fertilizer to chickweeds growing in pots, resulting in improved yield and root elongation. These results indicate that waste milk could be recycled for agricultural purposes, however, this nano-fertilizer needs to be tested further in field experiments.
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Affiliation(s)
- Yanping Zhu
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Yuxuan Cao
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Bingbing Fu
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Chengjin Wang
- Department of Civil Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6, Canada
| | - Shihu Shu
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Pengjin Zhu
- Guangxi Subtropical Crops Research Institute, Nanning, 530000, People's Republic of China
| | - Dongfang Wang
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - He Xu
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Naiqin Zhong
- Institute of Microbiology, Chinese Academy of Sciences, 100101, Beijing, People's Republic of China
| | - Dongqing Cai
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China.
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Zhu X, Ji H, Hua G, Zhou L. Dynamic Release Characteristics and Kinetics of a Persulfate Sustained-Release Material. TOXICS 2023; 11:829. [PMID: 37888680 PMCID: PMC10611088 DOI: 10.3390/toxics11100829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/19/2023] [Accepted: 09/26/2023] [Indexed: 10/28/2023]
Abstract
Sustained-release materials are increasingly being used in the delivery of oxidants for in situ chemical oxidation (ISCO) for groundwater remediation. Successful implementation of sustained-release materials depends on a clear understanding of the mechanism and kinetics of sustained release. In this research, a columnar sustained-release material (PS@PW) was prepared with paraffin wax and sodium persulfate (PS), and column experiments were performed to investigate the impacts of the PS@PW diameter and PS/PW mass ratio on PS release. The results demonstrated that a reduction in diameter led to an increase in both the rate and proportion of PS release, as well as a diminished lifespan of release. The release process followed the second-order kinetics, and the release rate constant was positively correlated with the PS@PW diameter. A matrix boundary diffusion model was utilized to determine the PS@PW diffusion coefficient of the PS release process, and the release lifespan of a material with a length of 500 mm and a diameter of 80 mm was predicted to be more than 280 days. In general, this research provided a better understanding of the release characteristics and kinetics of persulfate from a sustained-release system and could lead to the development of columnar PS@PW as a practical oxidant for in situ chemical oxidation of contaminated aquifers.
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Affiliation(s)
- Xueqiang Zhu
- Engineering Research Center of Mine Ecological Restoration, Ministry of Education, Xuzhou 221116, China; (X.Z.); (H.J.); (G.H.)
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Hanghang Ji
- Engineering Research Center of Mine Ecological Restoration, Ministry of Education, Xuzhou 221116, China; (X.Z.); (H.J.); (G.H.)
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Gang Hua
- Engineering Research Center of Mine Ecological Restoration, Ministry of Education, Xuzhou 221116, China; (X.Z.); (H.J.); (G.H.)
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Lai Zhou
- Engineering Research Center of Mine Ecological Restoration, Ministry of Education, Xuzhou 221116, China; (X.Z.); (H.J.); (G.H.)
- School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
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