Yousef, L. A. published the artcileUranium(VI) Adsorption Using a Mixture of 1-Amino-2-naphthol-4-sulfonic Acid and Bentonite: Kinetic and Equilibrium Studies, Quality Control of 116-63-2, the publication is Radiochemistry (Moscow, Russian Federation) (2020), 62(4), 511-523, database is CAplus.
Abstract: Uranium was adsorbed using bentonite treated with 1-amino-2-naphthol-4-sulfonic acid (ANSA). The prepared Bt-(ANSA) was characterized, and its adsorption affinity for uranium(VI) was evaluated. The influence exerted on the uranium adsorption by pH, contact time, adsorbent dose, initial uranium concentration, interfering ions, and temperature was studied. The optimum conditions are pH 8.5, 0.04 g of Bt-(ANSA) per 10 mL of 400 mg/L uranium solution, and 20-min contact at room temperature The majority of cations except Th, Fe, Cu, and Ni do not interfere with the uranium adsorption. The adsorption kinetics and equilibrium were studied. The application of the Langmuir model showed that the maximum sorption capacity reached 90.9 mg/g at room temperature The adsorption process was found to follow a pseudo-second order kinetic model at 400 mg/L uranium concentration Evaluation of thermodn. parameters (ΔG°, ΔH°, and ΔS°) shows that the adsorption is spontaneous exothermic accompanied by a decrease in randomness. Uranium(VI) ions were efficiently desorbed using a 1 M HNO3 solution with the adsorbent regeneration. The optimum conditions were applied to sep. uranium from carbonate leach liquor solution of a field sample from Abu Hamatta area, SW Sinai, Egypt.
Radiochemistry (Moscow, Russian Federation) published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C9H9ClN2, Quality Control of 116-63-2.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem