Specific Surface Area by Colorimetry and Image Analysis

Specific surface area is more informative than grain size for fine-grained sediments where Ss > 1 m2/g. In fact, specific plays a central role in engineering properties and processes soils, including pore bioactivity; fabric, plasticity, rheology; hydraulic electrical conductivity; compressibility residual friction angle; all forms of coupled processes. This research advanced dye adsorption method using digital image colorimetry implemented with smartphone technology. particular, this adopted water-based approach to reach internal surfaces platy phyllosilicates, selected short molecules reduce the range potential molecular contact area, developed physics-based model analyze complete data set minimize uncertainty determinations. The study involved soils distinct mineralogy (from 600 m2/g) various cationic dyes protein explore effect size, shape, pH. Crystal violet emerged as reliable soil characterization. Time-dependent measurements confirmed second-order kinetics highlight importance time.