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首页> 外文期刊>Separation and Purification Technology >Investigations of the effects of temperature and initial sample pH on natural organic matter (NOM) removal with electrocoagulation using response surface method (RSM)
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Investigations of the effects of temperature and initial sample pH on natural organic matter (NOM) removal with electrocoagulation using response surface method (RSM)

机译：使用响应面法（RSM）研究温度和初始样品pH对电凝去除天然有机物（NOM）的影响

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摘要

The removal of natural organic matter (NOM) from surface water by electrocoagulation (EC) was studied using response surface method (RSM). Factors used in the empirical model were electric charge per liter, initial pH and temperature. Relevant square and interaction terms of factors were studied. Based on analysis of variance (ANOVA), the model fitted well with dissolved organic carbon (DOC) reduction, aluminum dissolving and pH changes. UV 254 nm absorbance removal was moderately predicted. According to results, temperature affected significantly the dissolving rate of aluminum electrodes. Initial DOC concentration of the surface water was 18.35 mg/1. Maximum DOC removal of 80.4% was obtained when high electric charge per liter (144 C/l), low pH (4.3) and high temperature (295.15 K) were used. However, high DOC removal of 76.2% was predicted also when water temperature was only 275.15 K. Effect of temperature on NOM removal was minor as compared to the effects of electric charge per volume and the initial pH. EC neutralized pH during the EC treatment and had little impact on the conductivity of the water. According to the results, EC can be used for NOM removal during cold water period in Nordic countries.
机译：使用响应表面法（RSM）研究了通过电凝（EC）从地表水中去除天然有机物（NOM）的方法。在经验模型中使用的因素是每升电荷，初始pH和温度。研究了因素的相关平方和相互作用项。基于方差分析（ANOVA），该模型非常适合溶解有机碳（DOC）减少，铝溶解和pH值变化。可以预测到紫外线254 nm的吸光度去除。结果表明，温度显着影响铝电极的溶解速度。地表水的初始DOC浓度为18.35 mg / 1。当使用每升高电荷（144 C / l），低pH（4.3）和高温（295.15 K）时，最大DOC去除率为80.4％。但是，当水温仅为275.15 K时，也可以预测到DOC的去除率高达76.2％。与每体积电荷和初始pH值的影响相比，温度对NOM去除的影响很小。 EC在EC处理期间中和了pH，对水的电导率影响很小。根据结果​​，在北欧国家，EC可用于冷水时期的NOM去除。

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