科研之友
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摘要
Static experiments were carried out to study the pipe scale behavior with phosphate rock flotation wastewater. The performance of an anti-scalant that can be regarded as composition of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) was validated. Its scale inhibiting mechanism could be viewed as investigation with zeta potential, turbidity value, X-ray diffraction (XRD) as well as scanning electron microscope (SEM). The experimental results demonstrated that the compound of PBTCA and HEDP has more favorable properties of scale inhibition than its components for simulative wastewater and actual flotation wastewater. The effects of hardness, alkalinity, pH and temperature of solution on the scale inhibition rates of the anti-scalant are comparatively high. The CaSO4 samples were analyzed and prepared after addition of the anti-scalant, which indicated that the inhibition efficiency reached the maximum and the absolute value of zeta potential reached the maximum, whilst the turbidity value of solution was minimal. XRD and SEM results indicated that the inhibitor caused the CaSO4 crystal lattice of scale to be distorted, then the regularly dense crystal acicular structure transformed into amorphous loose granulation.
- 出版日期2018-1
- 单位贵州大学
