Topic
Ammonia
About: Ammonia is a research topic. Over the lifetime, 16217 publications have been published within this topic receiving 271940 citations. The topic is also known as: NH3 & azane.
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TL;DR: In this system, nitrogen removal ratio was affected by C/N ratio and TOC loading, not by the amount of granular sludge, and stable isotopic analysis using 15N-labeled nitrate showed that N2 gas was formed by anammox reaction.
75 citations
TL;DR: In this article, the effect of experimental conditions, electrochemical test parameters, electrocatalytic activity, thermodynamics, and possible deactivation mechanism of the catalysts were investigated, and the slopes of AOR onset potential and hydrogen adsorption/desorption potential of Pt/C as a function of pH follow Nernst equation.
75 citations
TL;DR: Experimental and theoretical findings demonstrate that additives including amine and hydroxyl group are suitable for modifying aqueous ammonia absorbent for CO(2) removal.
Abstract: Aqueous ammonia absorbent (10 wt %) was modified with four kinds of additives (1 wt %) including amine and hydroxyl groups, i.e., 2-amino-2-methyl-1-propanol (AMP), 2-amino-2-methyl-1,3-propandiol (AMPD), 2-amino-2-ethyl-1,3-propandiol (AEPD), and tri(hydroxymethyl) aminomethane (THAM), for CO2 capture. The loss of ammonia by vaporization was reduced by additives, whereas the removal efficiency of CO2 was slightly improved. These results were attributed to the interactions between ammonia and additives or absorbents and CO2 via hydrogen bonding, as verified by FT-IR spectra and computational calculation. Molecular structures as well as binding energies were obtained from the geometries of (ammonia + additives) and (ammonia + additives + CO2) at the optimized state. These experimental and theoretical findings demonstrate that additives including amine and hydroxyl group are suitable for modifying aqueous ammonia absorbent for CO2 removal.
75 citations
TL;DR: In this article, the adsorption of ammonium (NH 4 + ) to the sludge floc matrix has been investigated in two activated sludge treatment plants and the highest observed amount of adsorbed ammonium corresponded to 0.4-0.5 mg NH 4 + -N/gSS.
75 citations
TL;DR: Metal speciation calculations indicated that the formation of less adsorbable metal-ammonia complexes decreased metal adsorption, therefore enhanced metal leaching, and high concentrations of ammonia can increase the release of Cu(II) and Cd( II) in the alkaline pH range.
75 citations