泥炭土中腐殖酸的提纯和表征研究  

ISOLATION AND CHARACTERIZATION OF HUMIC ACIDS FROM PEAT SOIL

作　　者：王波[1] 刘德军[1] 姚军[1] 龙浩骑[1] 陈曦[1] 苏锡光[1] 曾继述[1] 范显华[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《辐射防护》2009年第3期172-180,共9页Radiation Protection

摘　　要：本文参照国际腐殖酸协会(IHSS)推荐的从土壤中提纯腐殖酸方法,对英国泥炭、辽宁泥炭土及三种市售商品腐殖酸(Fluka、Alfa和Aldrich)进行提取和纯化,得到了纯度较高的五种不同来源腐殖酸样品。用元素分析法、傅立叶变换红外光谱法(FTIR)、紫外-可见光谱法(UV-Vis)和电位滴定法等对所得样品进行表征,获得了这些腐殖酸的C、H、O、N及部分微量元素含量、以及红外光谱、紫外-可见光谱和酸性功能基含量等物理化学参数。通过以上研究,建立了从土壤中提纯腐殖酸的实验工艺,得到了所提取腐殖酸的一些基本物理化学参数,为进一步开展腐殖酸对核素迁移影响研究准备基础资料。In this study, two different humic acids extracted from England and China peat soil, as well as three purified products extracted from commercially available humie acids [ Fluka （Fluka, Neu-Ulm, Germany, Alfa （Alfa Aesar, Ward Hill, USA） and Aldrich （Aldrich-Chemical Co, Gillingham-Dorset） ] were obtained respectively with the modified IHSS （International humic substances society） procedure. The chemical and structural information of these humic acids were characterized by some tech- niques, such as elemental analysis, ultraviolet-visible spectroscopy （UV-Vis）, Fourier transform infrared spectroscopy （FTIR） and electropotential titration. UV-Vis spectra, infrared spectra, values for elemental composition and the contents of carboxyls, phenolic hydroxyls and total acidities of these humic acids were acquired. It is indicated that all these humic acids are different in the aspect of chemical structure, respectively, and these humic acids would be used for the experimental research of the interaction between the humic acids and radionuclides.

关 键 词：核素迁移 腐殖酸 提纯 表征 

分 类 号：S153[农业科学—土壤学]