水环境中离子对电化学水垢形成的影响

The impact of ion to electrochemical scale formation in water environment

为了研究水中成分对水垢形成的影响情况,我们根据经验选出水环境中成分中差异较大且对水垢形成有影响的四种因素(HCO_3、硬度、P、Ca/Mg比),通过正交试验研究其对水垢形成的影响,并通过扫描电镜和离子色谱仪分析仪分析水垢形貌和沉淀量,结果得出:影响大小依次是:HCO_3>硬度>P>Ca/Mg比。其中HCO_3、硬度、Ca/Mg比对水垢形成有促进作用,而P离子对水垢形成有抑制作用。进一步结合对应形成的水垢形貌综合分析,发现P离子会减少水垢晶核的形成和晶体的生长,从而降低水垢沉淀量,起到抑制水垢的作用。

In order to study the impact of water compositions to scale formation, based on experience, we choose four factors（HCO3, Hardness, P, Ca/Mg） that are discrepant but all have an influence on the formation of scale, and then through orthogonal test, we study the impact situation of the factors to scale formation, and through scanning electron microscope and ion chromatograph analyzer, we analysis the morphology and precipitation amount of the scale. The result is that four factors sorted by effect size from big to small： HCO3〉Hardness〉P〉Ca/Mg, and meanwhile HCO3, Hardness and Ca/Mg have promoting effect on scale, P ion has inhibiting effect on scale. Rely on further analysis with scale morphology, we find P ion can reduce the formation and growth of scale crystal nucleus, drop scale precipitation amount and therefore has inhibiting effect on scale.