摘要
为探讨腐殖酸在环境中的行为及光解除去腐殖酸的可能性，利用大于２９０ｎｍ的模拟日光辐照，探讨了大骨节病病区、非病区腐殖酸和泥炭腐殖酸的光解过程和光解机理及过氧化氢对其光解的影响，发现随着光照时间的延长，腐殖酸水体系的总有机碳（ＴＯＣ）含量降低，ｐＨ值下降，过氧化氢可以促进腐殖酸的光解，其光解过程遵循一级动力学规律。计算了不同来源腐殖酸光解的速率及光解半衰期，发现土壤和泥炭腐殖酸比大骨节病病区饮水中腐殖酸光解速率快，光解半衰期短。用富利叶红外（ＦＴ－ＩＲ）和高效毛细管电泳，分析了部分腐殖酸光解的残留混合物，发现其仍保持了腐殖酸的基本结构特征，但具有更大的分散性。
To study the evnironmental behavior of fulvic acid (FA) and the possibility of removing FA in potable water, imitate sunlight above 290 nm was used. The process and mechanism of the photodegradation of FAs from Kaschin-Beck disease (KBD) prone areas and non-KBD areas, the influences of hydrogen peroxide (H_2O_2) on the FA degradation were investigated.With the increase of sunshine time, the total organic carbon (TOC) and the PH value of FA solution decreased. H_2O_2 enhance the FA photodegradatio rate significantly. The process of FA photodegradation follow the pseudo-first order dynamic law. Photodegradation rate and half-life of FAs from different origins were calculated. FAs from soil and peat photedegraded faster than FAs from potable water of KBD areas. Photodegradation residues of FAs were analyzed by Fourier-transform infrared spectrometry and high performance capillary electrophoresis.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1996年第3期270-275,共6页
Acta Scientiae Circumstantiae
基金
国家"八五"攻关项目
