The sorption behaviour of Sr into granite was studied with the presence or absence of typical colloids (goethite, bentonite and humic acid). A batch technique was used to analyse the influencing process of colloids and key factors. Moreover, scanning electron microscopy and Fourier transform infrared spectroscopy were used to characterize granite samples before and after the batch experiments. The experiments showed that the presence of colloids promotes the sorption of Sr in the broken granite system; when goethite, bentonite or humic acid (HA) was present, the sorption capacity percentages were 1.8, 2.13 and 1.93 times higher, respectively, than those in the granite only system. As the initial Sr²⁺ concentration increased, the sorption of Sr increased, but the sorption percentage decreased; the sorption percentage reached a maximum at pH = 7 and decreased as the acidity or alkalinity of the solution increased. The sorption of granite may be related to the interstitial water of the hydroxyl, quartz, and feldspar, the intergranular water of granite groups and the water molecules attached to the granite. Moreover, the surface of the granite sample was rougher after the sorption experiment.

在有或没有典型胶体（针铁矿，膨润土和腐殖酸）存在下，研究了Sr在花岗岩中的吸附行为。采用批处理技术分析胶体的影响过程和关键因素。此外，在分批实验之前和之后，使用扫描电子显微镜和傅里叶变换红外光谱来表征花岗岩样品。实验表明，胶体的存在促进了破碎花岗岩系统中Sr的吸附。当存在针铁矿，膨润土或腐植酸（HA）时，其吸附容量百分比分别比仅花岗岩系统高1.8、2.13和1.93倍。作为最初的Sr ²⁺浓度增加，对Sr的吸附增加，但吸附百分数降低；在pH = 7时，吸附率达到最大值，并随着溶液的酸度或碱度增加而降低。花岗岩的吸附可能与羟基，石英和长石的间隙水，花岗岩基团的粒间水以及附着在花岗岩上的水分子有关。此外，吸附实验后，花岗岩样品的表面更粗糙。