華中農(nóng)業(yè)大學(xué)在稻田農(nóng)藥殘留去除及病害綠色防控方面取得新進(jìn)展

　　近日，華中農(nóng)業(yè)大學(xué)植物科學(xué)技術(shù)學(xué)院農(nóng)藥毒理團(tuán)隊研究成果以“Magnetic MXene based metal organic frameworks composites: synthesis, characterization and application”為題在Journal of Environmental Chemical Engineering上發(fā)表。該研究合成了一種既可抑制稻瘟病病菌（Magnaporthe grisea Barr.）又可以吸附去除稻田殘留農(nóng)藥的磁性MOF復(fù)合材料。

 

　　研究人員結(jié)合二維無機(jī)化合物MXene和金屬有機(jī)骨架Zn-MOF-74合成了一種兼具吸附及抗菌能力的多功能磁性復(fù)合材料Fe3O4@MXene@MOF-74。經(jīng)FT-IR，TEM，SEM，XRD，VSM，BET，TG等一系列表征分析，證實該材料具有穩(wěn)定的化學(xué)結(jié)構(gòu)，表面富含大量的官能團(tuán)，可以快速分散在水環(huán)境中?；谠摬牧辖⒘说咎锷鷳B(tài)系統(tǒng)中4中三唑類殺菌劑多殘留的去除方法，在取自三個省市的稻田水樣加標(biāo)實驗中，對目標(biāo)藥劑去除效率高達(dá)90 %以上。重復(fù)利用性實驗證實，該材料連續(xù)五次吸附-解吸循環(huán)后，仍可以保持穩(wěn)定的結(jié)構(gòu)，對目標(biāo)殺菌劑仍具有較高的去除率。此外，在復(fù)合材料生物活性研究方面發(fā)現(xiàn)，該材料對稻瘟病菌病菌表現(xiàn)出明顯的抑制作用，表明該材料對稻田常見病害的防治具有較好的潛力。該研究對稻田生態(tài)系統(tǒng)中農(nóng)藥殘留凈化去除以及多功能吸附劑的開發(fā)具有重要意義。

 

　　植物科學(xué)技術(shù)學(xué)院碩士研究生盧志衡為該論文第一作者，楊中華副教授為通訊作者，國家地質(zhì)實驗測試中心教授級高級工程師田芹也參與了該研究。該研究得到國家重點研發(fā)計劃項目（2019YFD1002103）、國家自然科學(xué)基金（21507032）、湖北省自然科學(xué)基金（2020CFB528）和中國農(nóng)業(yè)科研系統(tǒng)專項資金（CARS-31-31）資助。

 

　　【英文摘要】

 

　　Triazole fungicides are the most frequently used in preventing and controlling rice blast due to their high efficacy, broad spectrum and long effective duration. However, serious environmental problems might be posed by these agricultural chemical's residues. In this work, a novel magnetic composite （Fe3O4@MXene@MOF-74） was synthesized by a facile strategy and applied to remove triazole fungicides. Specifically, the morphology and property of this prepared material was analyzed by a series of characterizations. The adsorption performances were systematically investigated, and the maximum adsorption capacity towards epoxiconazole and tebuconazole were 120.96 and 108.26 mg g?1, respectively. The adsorption process could be described by pseudo-second-order kinetic model and Langmuir isotherm model, and the adsorption mechanism was predominantly determined by hydrogen bonding, covalent bonding and π-π stacking, along with electrostatic and physical interaction. In actual application, the satisfactory removal performances were obtained in paddy field water samples. Finally, it is worth mentioning that Fe3O4@MXene@MOF-74 was proved to have antibacterial activity, and the effective concentration for 50% inhibition （EC50） value against mycelium growth of Magnaporthe grisea Barr. was 0.70 g L?1. Consequently, bi-functional properties of excellent adsorption performance and antibacterial activity make Fe3O4@MXene@MOF-74 a great potential in paddy field applications.

 

　　論文鏈接：https://www.sciencedirect.com/science/article/pii/S2213343722009101?dgcid=author