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首页> 外文期刊>Desalination: The International Journal on the Science and Technology of Desalting and Water Purification >Investigation of fig leaf extract as a novel environmentally friendly antiscalent for CaCO3 calcareous deposits
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Investigation of fig leaf extract as a novel environmentally friendly antiscalent for CaCO3 calcareous deposits

机译：无花果叶提取物作为CaCO3钙质沉积物的新型环保防垢剂的研究

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摘要

Mineral scales were deposited from a CaCl2 brine solution (0.7 M NaCl, 0.0025 M NaHCO3,0.028 M Na2SO4 and 0.01 M CaCl2) by cathodic polarization of the steel surface to -0.9 V (vs. SCE) at 40°C. Nucleation, crystal growth and total coverage of the surface regions were characterized by different impedance behaviour. The effect of fig leaves (Ficus carica L.) extract as an antiscalent in an alkaline CaCl2 brine solution was studied using chronoamperometry, electrochemical impedance spectroscopy (EIS) techniques and conductivity measurements, in conjunction with microscopic examination. EIS measurements were carried out at the open circuit potential and -0.9 V (vs. SCE) to investigate the antiscale function of the extracts of fig leaves. The surface area occupied by the scale deposits decreases with increasing fig leaf extract concentrations and the critical concentration required to inhibit scale formation was 75 ppm. Fig leaf extract was found to impede CaCO3 supersaturation and increase the time of nucleation. The data indicated that fig leaf extract could be used safely as an antiscalent.
机译：通过在40°C下将钢表面阴极极化至-0.9 V（vs. SCE），从CaCl2盐水溶液（0.7 M NaCl，0.0025 M NaHCO3、0.028 M Na2SO4和0.01 M CaCl2）中沉积出氧化皮。通过不同的阻抗行为来表征成核，晶体生长和表面区域的总覆盖率。使用计时电流分析法，电化学阻抗谱（EIS）技术和电导率测量，结合显微镜检查，研究了无花果叶提取物在碱性CaCl2盐水溶液中作为防垢剂的作用。 EIS测量在开路电势和-0.9 V（vs. SCE）下进行，以研究无花果叶提取物的抗垢功能。随着无花果叶提取物浓度的增加，水垢沉积物所占的表面积减小，抑制水垢形成所需的临界浓度为75 ppm。无花果叶提取物被发现会阻止CaCO3过饱和并延长成核时间。数据表明无花果叶提取物可以安全地用作防垢剂。

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