Abstract
Ushbu maqolada bentonitni kislotali faollangan hamda poliakrilamid bilan modifikatsiya qilib olingan adsorbentlarning nol zaryad nuqtasi qiymatlari hamda izoterma modellari yordamida tahlil qilingan. APAM-B va KPAM-B adsorbentlari pH 4 da 98 va 86 % yutilish bilan eng yaxshi natijani ko‘rsatdi.. PBMB10 va PBMB adorbentlari mos ravishda pH 6 va 5 da 68 % hamda 62 % Zn2+ ionlarini adsorbsiyalagan. Freyndlix modeliga ko‘ra KF (mg/g) qiymatlari PBMB da 5,73, PBMB10 da 16,51, KPAM-B 27,1 da va APAM da esa 321,3 mg/g ga teng ekanligi aniqlangan. E (o‘rtacha erkin adsorbsiya energiyasi) qiymatlari mos ravishda 50,03; 47.97; 44,67 va 30,29 kJ/mol ga teng ekanligi aniqlandi, buni kuchli kimyoviy adsorbsiya ya’ni adsorbent bilan Zn²⁺ orasida eng mustahkam bog‘lanishdan nisbatan zaifroq kimyoviy bog‘lanishga qarab kamayib borganligi bilan izohlash mumkin.References
1. Kanti Sen T, Gomez D. Adsorption of zinc (Zn2+) from aqueous solution on natural bentonite. Desalination. Vol. 267(2–3),
2011. P. 286-294. doi.org/10.1016/j.desal.2010.09.041.
2. Şimşek, S., Ulusoy, U. & Ceyhan, Ö. Adsorption of UO2 2+, Tl+, Pb2+, Ra2+ and Ac3+ onto polyacrylamide-bentonite composite. Journal of Radioanalytical and Nuclear Chemistry 256, 315–321 (2003). https://doi.org/10.1023/A:102395380524
3. Selim K.A., Rostom M., Youssef M.A., Abdel-Khalek N.A, Abdel Khalek M.A., ElSayed Hassan R. E. Physicochem. Probl. Miner. Process., 56(6), 2020, 145-157. https:// DOI: 10.37190/ppmp/127833
4. Mahdaviab A.E.B., Panahpourb E., Kalbasic R. J., Gholamib A. Investigation of adsorption activity of poly(acrylamide–styrene)/bentonite nanocomposite for efficient removal of manganese ions from aqueous solution. Desalination and Water Treatment 210 (2021) 316–329. doi: 10.5004/dwt.2021.26505
5. Larakeb B. M., Youcef L., Achour S., Removal of Zinc from Water by Adsorpion on Bentonite and Kaolin. Athens Journal of Sciences. Vol. 4, (1). P. 47-58. https://doi.org/10.30958/ajs.4-1-4
6. Peng L.G, Zhu J.H, Han J, Wang X.X, Zhao M, Cheng H, Zhang Q.X. Study on Adsorption Mechanism of Acid-Modified Bentonite. IOP Conf. Series: Materials Science and Engineering 281 (2017) 012009 doi:10.1088/1757-899X/281/1/012009
7. Şimşek S. Adsorption properties of lignin containing bentonite–polyacrylamide composite for UO22+ ions. Desalination and Water Treatment 57 (2016) 23790–23799. doi: 10.1080/19443994.2015.1135478
8. Abdel E, Galil A, Ibrahim A. B, Abou-Mesalam M. M. Sorption behavior of some lanthanides on polyacrylamide stannic molybdophosphate as organic–inorganic composite. Int J Ind Chem DOI 10.1007/s40090-016-0080-1
9. Amutenya ELM, Zhou F, Liu J, Long W, Ma L, Liu M, Lv G. Preparation of humic acid-bentonite polymer composite: A heavy metal ion adsorbent. Heliyon. 2022 Jun 20;8(6):e09720. doi:10.1016/j.heliyon.2022.e09720. PMID: 35789871; PMCID: PMC9249857.
10. Sasikala S.P, Nibila T. A, Babitha K.B, Mohamed A.P, Solaiappan A. Competitive photo-degradation performance of ZnO modified bentonite clay in water containing both organic and inorganic contaminants. Sasikala et al. Sustainable Environment Research (2019) 29:1 https://doi.org/10.1186/s42834-019-0001-z