天然水体中Fe和草酸根分布与水体净化的关系

吴少林; 张婷; 黄智敏; 朱振兴; 李海珠

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

摘要

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0.6～0.8×10^2-mg/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减小量△ C0Dcr具有相关性.Fe/C₂O₄^2-较大,则△ CODer也较大,反之,Fe/C₂O₄^2-较小则△CODcr较小.

Abstract: The paper studied the distribution of oxalate and soluble Fe in natural water by ICP and UV-2100Dual-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 was0.200～0.400mg/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 moreFe/C₂O₄^2-,the more△CODcr,while theFe/C₂O₄^2-diminished,the△CODcr reduced.

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