Effects of acidic attack on chemical, mineralogical, and morphological properties of geomaterials

Effective adsorption of nutrients from simulated domestic sewage by modified maifanite

“…However, compared to RMF, which had a atter surface and smoother edges, MMF was mainly manifested by greater fragmentation and depression on the surface, more cracks, debris pockets and holes. Sulfuric acid modi cation enhanced the particle gap, which was consistent with the previous study (Ferrazzo et al, 2020). Simultaneously, uneven edges with irregular fractures appeared due to acid and roasting reasons.…”

Enantioselective Michael addition of aldehydes to maleimides catalysed by surface-adsorbed natural amino acids

“…Few materials employed in this study were examined by scanning electron microscopy (SEM), as these investigations proved to be useful to evidence morphological changes occurring during various treatments of montmorillonites. 82–84,93 Selected images are presented in Fig. 11.…”

Experimental investigation of binder based on rice husk ash and eggshell lime on soil stabilization under acidic attack

“…The mineralogical composition of residual basalt soil consists of quartz (SiO 2 ), hematite (Fe 2 O 3 ), kaolinite (Al 2 (Si 2 O 5 )(OH) 4 ) and anatase (TiO 2 ) 38 . Geotechnical properties indicates a clayey silty soil according to grain size distribution 31 , with liquid limit (%) of 56, plastic limit (%) of 50 and plastic index (%) of 4 39 , and MH classification 40 , with high compressibility and medium plasticity.…”

“…The pH range was adopted because soil changes under the effect of inorganic acidic attack, usually occur between pH ranges of 3–6 42 . Considering high acidity events, the literature recommends studying lower pH values, such as close to 1 22 , 38 , 43 . Batch tests were performed following standard D 4646-03 44 .…”