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Zhang Z, Chen Q, Xu K, Zhang K, Zhang M, Qi Y, Zhang W, Liu Y, Wei Z, Liu Z. Selective Modifier-Assisted Humic Acid Extraction: Implications for Soil Quality Enhancement. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:9896-9907. [PMID: 38669322 DOI: 10.1021/acs.est.3c10713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Efficient use of humic acid (HA) for eco-friendly farming and environmental remediation requires further understanding of how targeted modification of HA affects the chemical structure of HA and thereby its effectiveness in enhancing soil quality. We developed novel selective modifiers (SMs) for extracting HA by codoping sodium and copper elements into the birnessite lattice. The structure of SMs was thoroughly examined, and the HAs extracted using SMs, referred to as SMHs, were subjected to a detailed evaluation of their functional groups, molecular weight, carbon composition, flocculation limits, and effectiveness in saline soil remediation. The results showed that replacing manganese with sodium and copper in SMs alters the valence state and reactive oxygen species. In contrast, SMHs exhibited increased acidic functional groups, a lower molecular weight, and transformed aliphatic carbon. Furthermore, the saline soil was improved through increased salt leaching and an optimized soil aggregate structure by SMHs. This research highlights the importance of targeted modification of HA and demonstrates the potential of these modifiers in improving soil quality for eco-friendly farming and environmental remediation.
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Affiliation(s)
- Zixin Zhang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
| | - Qi Chen
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
| | - Kunyu Xu
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
| | - Kexin Zhang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
| | - Min Zhang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
| | - Yingjie Qi
- Shandong (Linyi) Institute of Modern Agriculture, Linyi 276000, China
| | - Wenrui Zhang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
| | - Yang Liu
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
| | - Zhanbo Wei
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Zhiguang Liu
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Recourses and Environment, Shandong Agricultural University, Tai An, Shandong 271018, China
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Peng XX, Gai S, Liu Z, Cheng K, Yang F. Effects of Fe 3+ on Hydrothermal Humification of Agricultural Biomass. CHEMSUSCHEM 2024; 17:e202301227. [PMID: 37833827 DOI: 10.1002/cssc.202301227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/15/2023] [Accepted: 10/13/2023] [Indexed: 10/15/2023]
Abstract
Hydrothermal humification technology for the preparation of artificial humic matters provides a new strategy, greatly promoting the natural maturation process. Iron, as a common metal, is widely used in the conversion of waste biomass; however, the influence of Fe3+ on hydrothermal humification remains unknown. In this study, FeCl3 is used to catalyze the hydrothermal humification of corn straw, and the influence of Fe3+ on the hydrothermal humification is explored by a series of characterization techniques. Results show that Fe3+ as the catalyst can promote the decomposition of corn straw, shorten the reaction time from 24 h to 6 h, and increase the yield from 6.77 % to 14.08 %. However, artificial humic acid (A-HA) obtained from Fe3+ -catalysis hydrothermal humification contains more unstable carbon and low amount of aromatics, resulting in a significantly decreased stability of the artificial humic acid. These results provide theoretical guidance for regulating the structure and properties of artificial humic acid to meet various maintenance needs.
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Affiliation(s)
- Xiong-Xin Peng
- School of Water Conservancy and Civil Engineering Department, Northeast Agricultural University, Harbin, 150030, China
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
| | - Shuang Gai
- School of Water Conservancy and Civil Engineering Department, Northeast Agricultural University, Harbin, 150030, China
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
| | - Zhuqing Liu
- School of Water Conservancy and Civil Engineering Department, Northeast Agricultural University, Harbin, 150030, China
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
| | - Kui Cheng
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
- College of Engineering, Northeast Agricultural University, Harbin, 150030, China
| | - Fan Yang
- School of Water Conservancy and Civil Engineering Department, Northeast Agricultural University, Harbin, 150030, China
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
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Zhang X, Heng J, Zhao Y, Wang S, Wang Y, Hu Z. Effect of salinity on carbon sequestration in constructed wetlands and its functional mechanisms. BIORESOURCE TECHNOLOGY 2024; 391:129915. [PMID: 37890730 DOI: 10.1016/j.biortech.2023.129915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 10/29/2023]
Abstract
Currently, many constructed wetlands (CWs) are facing the threat of salinization, but its effect on the carbon sequestration function of CWs is still unclear. In this study, three CWs with different salinities (i.e., control: C-CW; low salinity: LS-CW; high salinity: HS-CW) were conducted. Increased salinity significantly reduced the carbon sequestration in CWs. The highest carbon sequestration was observed in C-CW (5.1 ± 0.2 kg C·m-2·y-1), and the carbon sequestration capacity of plants was identified as the major influencing factor. The substrate carbon pool decreased with salinity since it altered plant carbon inputs, enzyme activities, and microbial community structure. However, the decrement in the carbon pool management index with salinity indicated that salinity could enhance carbon pool stability and subsequently reduce carbon emissions of CWs. These findings improve the understanding in relationships between salinity and carbon sequestration in CWs and provide theoretical support for the proper management of CWs.
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Affiliation(s)
- Xinyi Zhang
- School of Environmental Science & Engineering, Shandong University, Qingdao 266237, PR China
| | - Jiayang Heng
- School of Environmental Science & Engineering, Shandong University, Qingdao 266237, PR China
| | - Yanhui Zhao
- School of Environmental Science & Engineering, Shandong University, Qingdao 266237, PR China; Field Monitoring Station of the Ministry of Education for the East Route of the South-to-North Water Transfer Project, Shandong University, Jinan 250100, PR China
| | - Shuo Wang
- School of Environmental Science & Engineering, Shandong University, Qingdao 266237, PR China
| | - Yuechang Wang
- Beijing Further Tide Eco-construction Co., Ltd, Beijing 100012, PR China
| | - Zhen Hu
- School of Environmental Science & Engineering, Shandong University, Qingdao 266237, PR China.
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Hu J. Synergistic effect of pollution reduction and carbon emission mitigation in the digital economy. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 337:117755. [PMID: 36948146 DOI: 10.1016/j.jenvman.2023.117755] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/05/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Synergetic control of environmental pollution and carbon emissions (SCEPCE) is essential to green development. The emergence of the digital economy has become a significant component in regional economic growth. Investigating the digital driving mode for SCEPCE in developing countries is crucial. This paper empirically analyzes the effect of establishing big data comprehensive experimental areas (BDCEAs) on air pollutants and carbon emissions using panel data of prefecture-level cities from 2009 to 2020 and the time-varying difference-in-differences method. The research found that (1) BDCEA inhibits pollution and carbon emissions, and the policy effect is sustainable. (2) The synergistic effect is significant, particularly in small and medium-sized cities and old industrial-base cities. The benefit of reducing pollution is only significant in the east. The effect of reducing CO2 emissions is only significant in the west. (3) The pollution reduction effect of digital economic development has the characteristics of an increasing marginal effect, and the marginal effect of its carbon reduction effect is not apparent. (4) The technological innovation and energy efficiency improvement effects are effective mechanisms. This paper enriches the studies on the factors influencing SCEPCE, which will help to realize SCEPCE and the harmonious coexistence of humans and nature in developing countries. However, policy incentives and green development strategies must be fine-tuned to achieve global SCEPCE.
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Affiliation(s)
- Jin Hu
- School of Big Data Application and Economics, Guizhou University of Finance and Economics, Guiyang 550025, Guizhou China.
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Ai S, Meng X, Zhang Z, Li R, Teng W, Cheng K, Yang F. Artificial humic acid regulates the impact of fungal community on soil macroaggregates formation. CHEMOSPHERE 2023; 332:138822. [PMID: 37150458 DOI: 10.1016/j.chemosphere.2023.138822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/27/2023] [Accepted: 04/29/2023] [Indexed: 05/09/2023]
Abstract
Artificial humic acid (A-HA), which is synthesized from agricultural wastes and has high similarity to a natural humic substance (HS) extracted from soil, has been proven by our group to have potential for biological carbon sequestration in black soils. However, the mechanism involves in the application of A-HA on soil aggregation processes resulting from microbial activity stimulation and modifications to microbial communities remains unclear. This study investigates the correlation between the formation and stability of soil aggregates and fungal communities with various amounts of A-HA added to the rhizosphere and non-rhizosphere soil. A-HA can increase the total organic carbon (TOC) and dissolved organic carbon (DOC) concentrations in soil, promoting macroaggregate formation and increasing the mean weight diameter (MWD). In addition, soil aggregate binding agents such as polysaccharides, protein, extracellular polymeric substances (EPS), and glomalin-related soil protein (GRSP) are significantly increased by the addition of A-HA. A-HA can drive microaggregate to assemble into macroaggregate by increasing the abundance of beneficial fungi (e.g., Trichoderma and Mortierella). The co-occurrence network supports that A-HA shifted the key species and increased interactions of fungal taxa. This study will lay a solid foundation for sustainable agricultural development of A-HA application for soil fertility restoration in the future.
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Affiliation(s)
- Shuang Ai
- College of Engineering, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
| | - Xianghui Meng
- College of Engineering, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
| | - Zhouxiong Zhang
- College of Engineering, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China
| | - Ronghui Li
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China
| | - Wenhao Teng
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China
| | - Kui Cheng
- College of Engineering, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China.
| | - Fan Yang
- Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China; School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China.
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