Granular activated carbon as an adsorbent for simultaneous removal of nitrosodipropylamine (NDPA) and nitrosodibutylamine (NDBA) from water

Economical and eco‐friendly adsorbent derived from “Halodule uninervis” for effective removal of N‐nitrosodiphenylamine from wastewater: Equilibrium, reusability, and mechanism studies

“…20 Among all methods, the adsorption method is the best and it aims to remove the pollutants directly from the contaminated water which is a cost-effective and simple process. 21,22 For the adsorptive removal of nitrosamine compounds, various adsorbents including cyclodextrin, 23 zeolite, [24][25][26][27] bentonite, 28 activated carbon, [29][30][31] and polymers 32 were examined. Wang et al 23 investigated the adsorption and thermal degradation of N-nitrosohexamethyleneimine, N-nitrosodimethylamine (NDMA), and nitrosopyrrolidine onto cyclodextrins, and they found the alkyl group in the nitrosamine compounds is captured into the cyclodextrine's cavity and the oxygen atom in the nitrosamine forms a hydrogen bond with the hydroxyl group of the cyclodextrin.…”

“…28 The removal of nitrosopyrrolidine from the solution using commercial coconut charcoal, oxidized coconut charcoal, acid coconut charcoal, commercial activated carbon, and oxidized activated carbon was studied by Widger et al, 30 and the adsorption capacities of these adsorbents found to be 191, 133, 18, 113, and 128 mg g À1 , respectively. Zhoua et al 31 investigated the simultaneous removal of nitrosodibutylamine and nitrosodipropylamine (NDPA) using granular activated carbon adsorbents and they found the maximum adsorption capacities are 8.87 and 4.22 mg g À1 , respectively. Another study carried out by Amayreh et al 29 for the removal of NDPhA from water found the efficiency of activated carbon adsorbent derived from the jute stick (JSAC) is 99.7% with an adsorption capacity of 219.4 mg g À1 .…”