Search

Your search keyword '"Gong, Lingxuan"' showing total 10 results
Start Over Author "Gong, Lingxuan"
10 results on '"Gong, Lingxuan"'

3. Can microplastics mediate soil properties, plant growth and carbon/nitrogen turnover in the terrestrial ecosystem?

Author

Yao Yao, Wang Lili, Pan Shufen, Li Gang, Liu Hongmei, Xiu Weiming, Gong Lingxuan, Zhao Jianning, Zhang Guilong, and Yang Dianlin

Subjects
MPs, terrestrial ecosystems, carbon and nitrogen turnover, greenhouse gases, microorganisms, Ecology, QH540-549.5
Abstract

Microplastic (MP) pollution, a global environmental problem, has been recently studied in marine and freshwater environments. However, our understanding of MP effect on terrestrial ecosystems, especially carbon (C) and nitrogen (N) turnover remains poor. This review summarizes the sources and distribution characteristics of MPs in terrestrial ecosystems and explores their effects on soil properties, plant growth, C and N turnover. Once entering the terrestrial ecosystem, MPs could involve in sequestrating carbon and nitrogen by changing soil properties (e.g., pH, soil aggregate stability, and soil porosity). MPs could exert direct influences on plants or on soil physical environment and microbial metabolic environment to indirectly affect plant growth, thus altering the quantity and quality of soil C and N inputs by shifts in plant litter and roots. The changes of the dominant bacteria phyla, related functional genes, and enzymes caused by MP pollution could affect C and N cycles. Additionally, the MP effect varies with its properties (e.g., types, shapes, elemental composition, functional groups, released additives). Future researches should unify the standard system of MP separation, detection, and reveal the ecological effects of MPs, especially their impacts on terrestrial carbon and nitrogen cycles in the context of climate changes.

Published
2022
Full Text
View/download PDF

8. Differences, links, and roles of microbial and stoichiometric factors in microplastic distribution : A case study of five typical rice cropping regions in China

Author

Yao, Yao, Wang, Lili, Gong, Lingxuan, Li, Gang, Xiu, Weiming, Yang, Xiaomei, Tan, Bingchang, Zhao, Jianning, Zhang, Guilong, Yao, Yao, Wang, Lili, Gong, Lingxuan, Li, Gang, Xiu, Weiming, Yang, Xiaomei, Tan, Bingchang, Zhao, Jianning, and Zhang, Guilong

Abstract

Microplastics (MPs), as new pollutants in agroecosystems, have already attracted widespread attention from scientists. However, our understanding of MP geographic distribution and its influencing factors across spatial scales remains poor. Here, a regional-scale field investigation was conducted to assess the distribution characteristic of MPs in five major rice-growing regions of China, and we explored the roles of biological and abiotic factors, especially stoichiometry and microbial influences on MP distribution. MPs were observed in all sampling sites, averaging 6,390 ± 2,031 items⋅kg–1. Sizes less than 0.5 mm and black and transparent MPs dominated. Fiber, classified as one of the MP shapes, occurred most frequently. MP community analysis, firstly used in paddy soil, revealed more black MPs abundance in Henan (HE), more rayon, blue, and other colors MPs in Hunan (HN), more transparent MPs in Tianjing (TJ), and more PE MPs in Heilongjiang (DB). Higher MP community diversity was found in most south paddy soils of this study, due to a broader range of sources. C/N showed a positive relationship with pellet-shaped MP abundance and MPs of size between 2 and 5 mm (P < 0.05). Chao1 index of soil microbial communities was positively correlated with the MP abundance, MPs of size less than 0.5 mm, and fiber abundance. The minimum temperature was positively correlated with MP abundance (P < 0.05), implying the potential effects of the freeze-thaw process might exist. The regression analysis highlighted the important role of population quantity in determining MP abundance (R = 0.421, P = 0.02). This study confirmed the wide distribution of MPs in different soil depths of paddy lands in China and demonstrated that its distribution was influenced by population quantity and environmental variables, such as microbiology. These findings could provide a basis for the toxicological behavior of MPs and the potential risk to human health.

Published
2022

9. Al cluster oxide modified a hematite/P3HT ternary Z-scheme photocatalyst with excellent photocatalytic performance: A discussion of the mechanism

Author

Gong Lingxuan, Zhengkui Li, Hu Youyou, Zhihao Chen, and Zhu Hongjie

Subjects
021110 strategic, defence & security studies, Environmental Engineering, Materials science, Health, Toxicology and Mutagenesis, 0211 other engineering and technologies, Oxide, Portable water purification, 02 engineering and technology, 010501 environmental sciences, Hematite, 01 natural sciences, Pollution, Catalysis, chemistry.chemical_compound, X-ray photoelectron spectroscopy, Chemical engineering, chemistry, visual_art, Cluster (physics), visual_art.visual_art_medium, Photocatalysis, Environmental Chemistry, Ternary operation, Waste Management and Disposal, 0105 earth and related environmental sciences
Abstract

The Z-scheme photocatalyst is valuable for use in polluted water purification, and there is a need to develop a cheap and efficient photocatalyst. This study presents a new type of Z-scheme photocatalytic material composed of hematite and P3HT, also, the Al cluster oxides were first used as a charge transfer mediator to construct Z-scheme photocatalysis system. In addition, by analyzing the electron rearrangement phenomenon exhibited by the XPS spectrum and the experimental results of the in-situ illumination XPS, it is found that Al cluster is beneficial to the electron multi-step charge transfer process and Al cluster favors the construction of Z-scheme structure between hematite and P3HT. This Poly-3-hexylthiophene (P3HT)/Al cluster oxide/hematite ternary photocatalyst exhibited an excellent degradation effect on bisphenol A and tetracycline. This study demonstrates the feasibility of using the Al cluster as a charge mediator in the Z-scheme, providing new Z-scheme catalyst construction idea which is beneficial to the popularization and use of Z-scheme system in practical applications, and providing a new material for water pollution purification.

Published
2020

10. A novel immobilized Z-scheme P3HT/α-Fe2O3 photocatalyst array: Study on the excellent photocatalytic performance and photocatalytic mechanism

Author

Zhengkui Li, Dandan Li, Hu Youyou, Gong Lingxuan, Zhu Hongjie, and Zhihao Chen

Subjects
Pollutant, 021110 strategic, defence & security studies, Environmental Engineering, Materials science, Health, Toxicology and Mutagenesis, Energy conversion efficiency, 0211 other engineering and technologies, Portable water purification, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, Pollution, Electrophoretic deposition, X-ray photoelectron spectroscopy, Chemical engineering, Nano, Photocatalysis, Environmental Chemistry, Degradation (geology), Waste Management and Disposal, 0105 earth and related environmental sciences
Abstract

The Z-scheme photocatalyst is valuable for use in polluted water purification. To improve the practical application value of the Z-scheme, in this study, a nano α-Fe2O3 and P3HT composite photocatalyst array was synthesized by electrophoretic deposition for the first time. This material was named F1P. The EPR, VBXPS and in situ illumination XPS analyses indicated that the charge transfer path of F1P conforms to the Z-scheme, and F1P array has a high light energy conversion efficiency. Due to the advantages of the Z-scheme system and the good light harvesting ability, F1P exhibited a good degradation effect on different types of pollutants under visible light irradiation. The degradation efficiency of tetracycline and bisphenol A by F1P can reach 97 % and 99 %, respectively. Moreover, F1P showed a certain resistance to water quality changes. After four cycles, F1P can maintain the structural stability and good pollutant treatment effect. Due to the high redox ability of F1P, the complex structure of pollutants can be destroyed and the degradation path of pollutants in F1P system was also analyzed. This study provides a new way of synthesizing Z-scheme systems and immobilizing Z-scheme photocatalysts. F1P is a new material with high practicability.

Published
2020

Catalog

Books, media, physical & digital resources
See catalog results