Trukhina Maria, Popov Konstantin, Oshchepkov Maxim, Tkachenko Sergey, Vorob'eva Alina, Guseva Olga
JSC "Fine Chemicals R&D Centre", Krasnobogatyrskaya Str. 42, b1, 107258 Moscow, Russia.
Department of Chemical and Pharmaceutical Technologies and Biomedical Pharmaceuticals, Mendeleev University of Chemical Technology of Russia, Miusskaya sq. 9, 125047 Moscow, Russia.
Materials (Basel). 2023 Sep 30;16(19):6516. doi: 10.3390/ma16196516.
Considerable efforts are made worldwide to reduce inorganic scale in reverse osmosis plants, boilers and heat exchangers, evaporators, industrial water systems, geothermal power plants and oilfield applications. These include the development of new environmentally friendly antiscalants and the improvement of conventional ones. The present report is dedicated to the unconventional application of spruce wood shavings in combination with polyacrylate (PAA-F1) in a model case of gypsum scale formation. The electrical conductivity of freshly prepared gypsum solutions with a saturation SI = 2.3 and a concentration of 0.05 mol·dm was analyzed over time at 25°C. It is demonstrated that the small amounts of wood shavings (0.1% by mass) alone, after being in contact with CaCl and NaSO stock solutions for 15 min, increase the induction time t by 25 min relative to the blank experiment (t). In the presence of PAA-F1 (0.1 mg·dm), the difference Δt = t - t constitutes 110 min, whereas the sequential treatment of the stock solutions with the shavings followed by PAA-F1 injection gives Δt = 205 min. The observed synergism is associated with the selective removal of colloidal Fe(OH) and Al(OH) nanoimpurities from the stock solutions via their sorption to the well-developed surface of wood. Wood shavings therefore represent a very promising and environmentally friendly material that can significantly improve the effectiveness of conventional antiscalants.
全球都在付出巨大努力来减少反渗透装置、锅炉、热交换器、蒸发器、工业水系统、地热发电厂和油田应用中的无机垢。这些努力包括开发新型环保阻垢剂以及改进传统阻垢剂。本报告致力于研究云杉木屑与聚丙烯酸酯（PAA-F1）在石膏垢形成模型案例中的非常规应用。在25°C下，对饱和SI = 2.3且浓度为0.05 mol·dm的新鲜制备的石膏溶液的电导率随时间进行了分析。结果表明，少量木屑（质量分数0.1%）在与CaCl和NaSO储备溶液接触15分钟后，相对于空白实验（t），诱导时间t增加了25分钟。在存在PAA-F1（0.1 mg·dm）的情况下，差异Δt = t - t为110分钟，而先用木屑处理储备溶液然后注入PAA-F1时，Δt = 205分钟。观察到的协同作用与通过胶体Fe(OH)和Al(OH)纳米杂质吸附到发达的木材表面而从储备溶液中选择性去除这些杂质有关。因此，木屑是一种非常有前景且环保的材料，可显著提高传统阻垢剂的有效性。
