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Chemical control of struvite scale by a green inhibitor polyaspartic acid

机译：绿色抑制剂聚天冬氨酸的Struvite规模化学控制

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摘要

Many efforts have been made to develop effective chemical inhibitors for struvite scale, which causes a range of operational problems in the wastewater treatment industry. Herein, the inhibitory capacity of polyaspartic acid (PASP) on the spontaneous precipitation of struvite at pH 9 was investigated. Struvite precipitates were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and energy dispersive X-ray spectroscopy (EDX). Precipitation experiments dosed with PASP revealed that PASP is effective in the growth inhibition of struvite and its inhibitory capacity is proportional to its concentration and that PASP also plays a role in the morphological modification of struvite crystals. The effect of several key parameters, including pH, mixing energy, reaction time, and calcium ions, on PASP inhibition performance was examined for potential practical applications. The results showed that the inhibitory capacity of PASP is sustainable and efficient. Dissolution experiments dosed with PASP were also conducted, and the results showed that PASP can accelerate the dissolution of preformed struvite, and this capacity increases with an increase in its concentration. Therefore, PASP can potentially act as a feasible and environmentally-friendly inhibitor and cleaning agent for struvite scale.
机译：许多努力已经为斯特鲁维特规模开发有效的化学抑制剂，这导致废水处理行业的一系列操作问题。在此，研究了PH9在pH9下稳定性沉淀的聚天冬氨酸（PASP）的抑制能力。使用X射线衍射（XRD），场发射扫描电子显微镜（FESEM）和能量分散X射线光谱（EDX）表征脱耐沉淀物。皮满注射实验表明，PASP在Sruvite的生长抑制中有效，其抑制能力与其浓度成比例，并且PASP也在Sruvite晶体的形态学改性中起作用。研究了几种关键参数，包括pH，混合能量，反应时间和钙离子的效果，用于潜在的实际应用。结果表明，皮满的抑制能力是可持续和高效的。还进行了用PASP给药的溶解实验，结果表明，皮满可加速预制稳定的斯特勒维矿石的溶解，并且该容量随其浓度的增加而增加。因此，PASP可能是斯特鲁维标度的可行性和环保抑制剂和清洁剂。

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  • 来源
    《RSC Advances》 |2015年第111期|共8页
  • 作者

    Han Li; Sheng-Hui Yu; Qi-Zhi Yao;

  • 作者单位

    CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 P. R. China.;

    CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 P. R. China.;

    School of Chemistry and Materials Science University of Science and Technology of China Hefei 230026 P. R. China;

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  • 正文语种 eng
  • 中图分类 化学;
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