Affiliation:
1. Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
2. Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Abstract
This study aimed to assess the role of polymeric sources (polypyrrole, polyaniline, and their copolymer) of nitrogen (N)-doped activated carbons (indexed as PAnAC, PPyAC, and PnyAC, respectively) on their adsorption efficiency to remove methyl orange (MO) as a model cationic dye. The adsorbents were characterized using FTIR, SEM, TGA, elemental analysis, and surface area. The kinetic experiments were performed in batches at different MO concentrations (C0) and adsorbent dosages. The adsorption kinetic profiles of pseudo-first-order, pseudo-second-order (PSO), Elovich, intraparticle diffusion, and liquid film diffusion models were compared. The results showed a better fit to the PSO model, suggesting a chemisorption process. The adsorption capacity (qe, mg/g) was found to have increased as MO C0 increased, yet decreased as the adsorbent quantity increased. At the adsorption operating condition, including MO C0 (200 ppm) and adsorbent dose (40 mg), the calculated qe values were in the order of PAnAC (405 mg/g) > PPyAC (204 mg/g) > PnyAC (182 mg/g). This trend proved the carbon precursor’s importance in the final properties of the intended carbons; elemental analysis confirmed that the more nitrogen atoms are in the activated carbon, the greater the number of active sites in the adsorbent for accommodating adsorbates. The diffusion mechanism also assumed a rate-limiting step controlled by the film and intraparticle diffusion. Therefore, such an efficient performance may support the target route’s usefulness in converting nitrogenous-species waste into valuable materials.
Funder
Deputyship for Research and Innovation, Ministry of Education in Saudi Arabia
Subject
Polymers and Plastics,General Chemistry
Reference57 articles.
1. Jayaswal, K., Sahu, V., and Gurjar, B. (2018). Water Remediation, Springer.
2. A review of nanotechnological applications to detect and control surface water pollution;Hairom;Environ. Technol. Innov.,2021
3. Iyinbor, A., Adebesin, B., Abimbola, O., and Adelani-Akande, A. (2018). Water Challenges of an Urbanizing World, IntechOpen.
4. Alghamdi, A.A., Al-Odayni, A.-B., Saeed, W.S., Almutairi, M.S., Alharthi, F.A., Aouak, T., and Al-Kahtani, A. (2019). Adsorption of azo dye methyl orange from aqueous solutions using alkali-activated polypyrrole-based graphene oxide. Molecules, 24.
5. Recent advances for dyes removal using novel adsorbents: A review;Zhou;Environ. Pollut.,2019
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献