新型纳米球形聚电解质刷膜阻垢剂用于废水处理初探

Exploration on the Application of Nano-Sized Spherical Polyelectrolyte Brush as Membrane Antiscalants for Wastewater Treatment

采用反渗透膜法处理废水的过程中反渗透膜表面极易结垢,往往要加入相应的膜阻垢剂,膜阻垢剂的好坏直接影响废水处理的效果及效率。采用光乳液聚合法合成具有核壳结构的高分子组装体纳米球形聚电解质刷,其在静电作用和道南效应影响下具有选择性吸附反离子及抑制无机盐结晶的特性,可以作为膜阻垢剂应用于废水处理过程。通过动态评估实验研究了纳米球形聚电解质刷对CaCO_(3)、CaSO_(4)、Al^(3+)的阻垢性能,结果表明与进口阻垢剂ASD-200相比,纳米球形聚电解质刷对CaCO_(3)、CaSO_(4)的阻垢性能分别提升了100%和30%,且具有出色的阻Al^(3+)性能。

In the process of using reverse osmosis membrane method to treat wastewater,the surface of membrane is easily scaled,which needs adding the corresponding membrane antiscalant,and the quality of membrane antiscalant directly affects the effectiveness and efficiency of wastewater treatment.Nano-sized spherical polyelectrolyte brush with a core-shell structure is synthesized by emulsion polymerization.Under the influence of static electricity and Donnan effect,it has the characteristics of selectively adsorbing counter ions and inhibiting the crystallization of inorganic salts.Therefore,the nano-sized spherical polyelectrolyte brush can be used in wastewater treatment process as an antiscalant.The scale inhibition performance of nano-sized spherical polyelectrolyte brush on CaCO_(3),CaSO_(4),Al^(3+) is evaluated through dynamic evaluation experiments.The experimental results show that,compared with the imported scale inhibitor ASD-200,the scale inhibition performance of nano-sized spherical polyelectrolyte brush on CaCO_(3) and CaSO_(4) is improved by 100%and 30%,respectively.Besides,it has excellent resistance performance on Al^(3+).