| 交变电磁场与超声波对硬水溶液及其结晶的影响 |
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| 引用本文： | 张传鑫,韩勇,朱琳,赵瑞宽,吴会帆.交变电磁场与超声波对硬水溶液及其结晶的影响[J].化工学报,2018,69(4):1620-1630. |
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| 作者姓名： | 张传鑫 韩勇 朱琳 赵瑞宽 吴会帆 |
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| 作者单位： | 1. 河北省测试计量技术及仪器重点实验室, 燕山大学电气工程学院, 河北 秦皇岛 066004;
2. 河北省应用化学重点实验室, 燕山大学环境与化学工程学院, 河北 秦皇岛 066004 |
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| 基金项目： | 国家自然科学基金项目（51408525）；河北省自然科学基金项目（F2015203287）。 |
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| 摘 要： | 实验研究了交变电磁场、超声波及二者协同作用对硬水溶液pH及电导率的影响，并对实验过程中溶液内析出的碳酸钙晶体表面形态及晶体组成进行了观测与研究。研究结果表明：交变电磁场与超声波都能影响Ca（HCO3）2溶液内的离子水解平衡；交变电磁场能提升正、负离子的碰撞概率，促进CaCO3晶体成核并抑制其体积增长；超声波能够促使CaCO3沉淀的生成，同时增大溶液内离子的迁移速率，破坏晶体内碳酸根排列的有序性，诱导CaCO3晶体缺陷性生长；通过SEM对最终生成的晶体形态观测可知，交变电磁场与超声波协同作用能够增加CaCO3小尺寸晶体的数量，并抑制晶体体积生长，且能增加霰石在沉淀中的比例。
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| 关 键 词： | pH 电导率 水解 成核 粒度分布 SEM |
| 收稿时间： | 2017-07-05 |
| 修稿时间： | 2017-11-15 |
Effect of alternating electromagnetic field and ultrasonic on hard water solution and its crystallization |
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| ZHANG Chuanxin,HAN Yong,ZHU Lin,ZHAO Ruikuan,WU Huifan.Effect of alternating electromagnetic field and ultrasonic on hard water solution and its crystallization[J].Journal of Chemical Industry and Engineering(China),2018,69(4):1620-1630. |
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| Authors: | ZHANG Chuanxin HAN Yong ZHU Lin ZHAO Ruikuan WU Huifan |
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| Affiliation: | 1. Key Laboratory of Measurement Technology and Instrumentation of Hebei Province, School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China;
2. Key Laboratory of Applied Chemistry of Hebei Province, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China |
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| Abstract: | The pH and conductivity, which can reflect the physicochemical properties of hard water directly, were studied. The pH and conductivity were measured under alternating electromagnetic field, ultrasonic and their combination respectively. The variations of pH and conductivity caused by the three physical forces were discussed. In addition, the effects on the surface morphology and composition of calcium carbonate crystals caused by alternating electromagnetic field, ultrasonic and their combination were investigated by scanning electron microscope(SEM). The results show that the alternating electromagnetic field can enhance the rate of collision of positive and negative ions, promote small crystal particles forming and inhibit its volume increasing. Ultrasonic can promote the calcium carbonate precipitation forming, increase the ion migration rate in the solution, destroy the order of CO32- in CaCO3 crystals and induce the crystal surface to grow defectively. The combination of alternating electromagnetic field and ultrasonic can increase the number of small crystals, inhibit its volume growing, and increase the proportion of aragonite in the scale. |
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| Keywords: | pH conductivity hydrolysis nucleation particle size distribution SEM |
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