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18 results on '"Hua, Dongwen"'

5. Research Progress of the Salt Barrier in Saline Alkali Land

Author

Sun Xiaomei, Wang Jian, and Hua Dongwen

Subjects
salt barrier, saline alkali land, biochar, Environmental sciences, GE1-350
Abstract

As an important land resource, the poor physical and chemical properties of soil in saline alkali land are the biggest obstacle to plant growth and development in saline alkali land. Carrying out targeted research on saline alkali land improvement is of great significance to ensure food security and protect the ecological environment. In recent years, it is urgent to fully tap the potential of such areas in agricultural production and ecological greening through economic and effective original soil improvement measures. The existing research and engineering projects of saline alkali land treatment at home and abroad are mostly realized through water conservancy, physics, chemistry, biology and other measures, and tend to form a comprehensive treatment system integrating engineering, plant, microorganism and other technologies. Among them, salt separation layer + concealed pipe drainage is a more effective and commonly used engineering measure in saline alkali land treatment. Through the research and development of supporting new materials and processes, constantly improving the technical system can greatly promote saline alkali land treatment. This paper discusses the improvement of salt barrier in saline alkali soil

Published
2022
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7. Dip-coated rapeseed meal composite as a green carrier for light-induced controlled release of pesticide

Author

Wang Jian, Hua Dongwen, Yang Chenxi, Wang Huanyuan, Li Ling, Shi Chendi, Li Juan, and Guo Zhen

Subjects
Chemistry, Scanning electron microscope, Composite number, General Chemistry, engineering.material, Biodegradation, Controlled release, Catalysis, Contact angle, Coating, Chemical engineering, X-ray photoelectron spectroscopy, Materials Chemistry, engineering, Fourier transform infrared spectroscopy
Abstract

In this work, we report the novel fabrication of polymerized octadecylsiloxane (PODS)/4-aminoazobenzene (AAB) coated rapeseed meal (RSM) using a facile one-pot dip-coating method. The as-prepared RSM-PODS/AAB employs RSM as a carrier, the PODS coating endows the material with hydrophobicity, thus improving the loading rate of pinoxaden (Pxd) of RSM-PODS/AAB, and the AAB moieties act as light-driven “stirrers” to stir the release of Pxd. The structure and composition were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, ultraviolet-visible spectroscopy and contact angle measurements. The experimental results indicate that the loading rate of Pxd was increased by 21.38% compared with pristine RSM. More importantly, the Pxd-loaded RSM-PODS/AAB showed perfect UV-visible and sunlight controlled release performance, the excellent biodegradability of RSM effectively supplying the nutrient elements of plant growth in the soil. Overall, this system provides a promising way to improve controlled drug release with UV-visible- and sunlight-responsive behavior.

Published
2020

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