Modified carbon nitride as an efficient adsorbent for ammonia nitrogen with low concentration

Abstract

The adverse effects of excessive ammonia on aquatic ecosystem have provoked the development of efficient methods for its removal. Here, we present a thermal copolymerization of melamine and sodium hydrogen carbonate and successfully introduce oxygen groups into the structure of g-C 3 N 4 , which is applied to lowconcentration ammonia removal. Oxygen groups are introduced into g-C 3 N 4 and increase its surface electron negativity. When the initial concentration of ammonia nitrogen is 18.74 mg L −1 , the lowest concentration of it after adsorption is 1.43 mg L −1 , and the ammonia nitrogen removal efficiency is 92.3%. The main reason for our material high performance on adsorption ammonium may be ascribed to deprotonated carboxylic acid, which has the ability to adsorb positively charged ammonium ions. K E Y W O R D Sammonia nitrogen adsorption, carbon nitride, near neutral pH

Experimental methods in chemical engineering: Zeta potential

“…[8,[39][40][41][42][43] ZP influence intra-cellular trafficking and cellular stabilization in in vitro experiments. [33,[44][45][46][47][48][49] WoS assigned most articles to pharmacology and pharmacy (777), followed by physical chemistry (659), multidisciplinary materials science (583), chemical engineering (515), and multidisciplinary chemistry (493) is the last category in the top five. The most prolific journals that mention the technique are: International Journal Of Biological Macromolecules (101), Colloids And Surfaces A-Physicochemical And Engineering Aspects (77), Journal Of Drug Delivery Science And Technology (75), Food Hydrocolloids (71), and Journal Of Molecular Liquids (70).…”

Identifying water factors that are related to ammonia nitrogen concentrations in Columbia River using a reversed hazard exponential model

“…In most surface water and soil deposits, there are many contaminants, which implies that the water is not suitable for drinking, which, in general, is the main reason for water quality (Yaraghi et al, 2020) studies. Some studies indicate that some chemical factors can be considered as quality indicators, such as the concentration of ammonia nitrogen (NH 3− N) in rivers (Che et al, 2019; da Silva Fortunato, Tosta dos Reis, Sérgio Mendonça, & Braga da Silva, 2020; Frazier, Naimo, & Sandheinrich, 1996; Jing & Lin, 2004; Sun, Wang, Wang, & Zhang, 2020; Wang et al, 2020; Xu et al, 2018).…”