Abstract Ammonia-mediated selective catalytic reduction (NH 3 -SCR) using Cu-exchanged chabazite zeolites as catalysts is one of the leading technologies for NO x removal from exhaust gases, with Cu II /Cu I redox cycles being basis reaction. The amount ions reduced by NO/NH can be quantified consumption during temperature-programmed experiments (NO-TPR). In this article, we show capabilities i...

Enzyme-induced carbonate precipitation (EICP) is a biocementation technique that produces comparatively fewer carbon dioxide emissions than traditional cementation. However, the use of synthetic reagents for EICP costly, and process an ammonium byproduct water pollutant. This study utilized fresh human urine as source urea calcium-rich zeolites adsorbent calcium ions cementation technique. Batc...

The weathering of a specimen kaolinite clay was studied over the course of 369 d via solid-state 29Si magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and high-field 27Al MAS NMR. The chosen baseline solution conditions (0.05 mol kg-1 of Al, 2 mol kg-1 of Na+, 1 mol kg-1 of NO3-, 1 mol kg-1 of OH-, and pH approximately 13.8) approximate those of solutions leaking from wa...

Nitrogen oxides (NOx) are formed during combustion in diesel engines and one current approach to reduce NOx to N2 is selective catalytic reduction with NH3 as reducing agent (NH3-SCR). To acquire both high activity and selectivity, the active site is often atomically dispersed metal atom, so-called single-site catalysts. In the case of NH3-SCR, one example is Cu-exchanged chabazite (Cu-CHA). Th...

Abstract Very primitive ultramafic igneous rocks occur at Mt. La Queglia (Abruzzo, Italy). They form a strongly deformed sill–dyke system now tilted vertically. These were initially classified as alnöite and, subsequently, have been suggested to be carbonatitic olivine melilitite. However, further investigation and interpretation of these is needed due the presence hand-specimen-scale textural ...

Secondary minerals occur within the tholeiitic basalts of Salsette Island in greater Mumbai region, as well other localities Deccan Volcanic Province (DVP). However, secondary show remarkable differences with respect to their mineral speciation and precipitation sequence, which are both due unique geological environment. The region is built up by subgroup, represents youngest sequence DVP. It f...