摘要
采用元素分析、傅立叶变换红外光谱(FT-IR)、固体^(13)C核磁共振(NMR)以及电镜扫描技术,对3种不同物料堆积的有机肥(T1,玉米杆:牛粪:菜籽饼=60:50:30;T2,玉米杆:废次烟草:牛粪:菜籽饼=35:25:40:30;T3,烟秆:废次烟叶:猪粪:菜籽饼=30:30:40:30)中腐殖酸的化学组成与结构特征进行了初步研究。结果显示:(1)不同有机肥中腐殖酸的C、H、N、O的含量均表现为T3>T2>T1;(2)FT-IR分析显示,T3样品中腐殖酸的双键H和苯环H较T1、T2样品多;T2样品在1050 cm^(-1)处的吸收强度相对较强;1710 cm^(-1)处的吸收峰T3样品最明显,含有羧基和羰基官能团最多,T1样品中最少。(3)固体^(13)C-NMR分析结果显示,脂肪碳(δ0~50)含量T3样品最高,含氧脂肪碳(δ50~110)含量T1样品最高,芳香碳(δ110~160)含量T2样品最高,δ160~230的羧基碳和羰基碳含量表现为T2=T3>T1;(4)电镜扫描结果显示,3种腐殖酸颗粒的表面具有维管状结构和孔隙,维管结构数量表现为T3>T2>T1,孔隙数量则表现为T1>T2>T3。以上结果表明,3种腐殖酸的化学组成与结构特征有着明显差异。
the chemical composition and structure characteristics of humic acid in three kinds types of organic fertilizers （Tl, comstalk： cow dung： rapeseed cake=60：50：30; T2, com stalk： tobacco waste： cow dung： rapeseed cake=35：25：40：30; T3, tobacco stem：tobacco waste： pig dung： rapeseed cake=30：30：40：30） are were studied using elemental analysis, Ffourier transform infraredspectroscopy （FT IR）, solid 13C nuclear magnetic resonance （NMR） and electron microscope scanning. The results showed that （1） C,H, N, O contents of organic humic acid were in T3〉in T2〉in Tl; （2） The FT-IR analysis showed that H-H and benzene H in humicacid in T3 were higher than〉 in Tl and T2. The absorption intensity at 1050 cm -1 of T2 is was relatively strong. Absorption intensityat 1710 cm-1 of the T3 sample is was the most strongest among the 3 treatments, which containing the most carboxyl and carbonylfunctional groups. （3） The solid 13C-NMR analysis results showed that the fat content of carbon （80-50） in T3 and the carbonoxygen fat （850-110） content in Tl and the aromatic carbon （8110-160） content in T2 arewere the highest among the threetreatments respectively, and that the carboxyl and carbonyl（5160~230） carbon contents were in T3=in T2〉in Tl; （4） the The electronmicroscope scanning results showed that there are were vascular structures and space surfacepores on the surface of humic acidparticles, with the number of vascular structures of T3〉of T2〉 of Tl, and the number of gap pores in the reversed orderon thecontrary. In summary, significant difference was observed inThe results showed that the chemical composition and structurecharacteristics of the three kinds types of humic acid has obvious difference.
出处
《中国烟草科学》
CSCD
北大核心
2016年第3期40-44,共5页
Chinese Tobacco Science
基金
中国烟草总公司贵州省公司重点科技项目(201411)
关键词
有机肥
腐殖酸
化学元素
红外
13C核磁共振
结构特征
电镜扫描
organic fertilizer
humic acid
chemical elements
IR, 13C-NMR
structural characteristics
scanning electron microscope
