天然水体中Fe和草酸根分布与水体净化的关系  

The relationship between the purification and distribution of Fe and Oxalate in natural water

作　　者：吴少林[1] 张婷[1] 黄智敏[1] 朱振兴[1] 李海珠[1] 

机构地区：[1]南昌航空大学,江西南昌330063

出　　处：《南昌航空大学学报（自然科学版）》2008年第2期58-62,共5页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：江西省自然科学基金资助项目(0620073)

摘　　要：采用电感耦合等离子体光谱仪（ICP）和UV-2100双光束紫外／可见分光光度计分析不同水体中溶解态铁和草酸根的分布，研究其与水体净化的关系。结果表明，河流、湖泊及雨水中普遍存在溶解态铁，雨水中的溶解态铁约0．6～0．8×10^-2mg／L，比湖泊水体小1个数量级，比赣江水体小2个数量级。研究的水体中都含有草酸根，其浓度范围为0．200—0．400mg／L。在光照条件和时间相同的情况下，水样中总铁浓度与草酸根浓度的比值[Fe]／[C2O4^2-]与光照后水样CODcr减△CODcr具有相关性。[Fe]／[C2O4^2-]较大，则△CODcr也较大，反之，[Fe]／[C2O4^2-]较小则△CODcr较小。The paper studied the distribution of oxalate and soluble Fe in natural water by ICP and UV -2100 Dual -beam UV/Vis spectrophotometer, and their effects on the purification of natural water. The results indicated that soluble Fe was widespread in rivers, lakes and rain. The concentration of soluble Fe in the rain was about 0.6 - 0.8 × 10 ^-2 mg/L, one order of magnitude smaller than that of the lakes, and two orders of magnitude smaller than that of the Ganjiang River. And the concentration of oxalate in researched water was 0. 200 - 0.400 mg/L. Under the same conditions of light and time, the results showed strong correlation between the concentration ratio of oxalate and soluble Fe（ [Fe]/[C2O4^2-] ） and the variation of CODcr after being insolated in the sun （△CODcr）, the more [Fe]/[C2O4^2-], the more △CODcr, while the [Fe]/[C2O4^2-] diminished, the △CODer reduced.

关 键 词：天然水体 草酸根 铁 

分 类 号：X132[环境科学与工程—环境科学]