Treated with concentrated sulfuric acid, Spherical Lignosulfonate Canon-Exchange Resin (LAR) is changed to an adsorption resin (LAAR), with specific surface area from 75m2/g to 399m2/g.

• 本文对木素磺酸阳离子交换树脂进行改性，使比表面积提高了四倍多。