337

Ushbu ishda biologik chiqindi polimer hisoblangan soch tolalariga sun’iy eritmalar tarkibidagi qo‘rg‘oshin ionlarini yutilish kinetikasi o‘rganilgan. Bunda psevdo-birinchi va ikkinchi tartibli kinetik modellar yordamida kinetika o‘rganilgan bo‘lib, olingan natijalar faollangan soch tolalariga Pb(II) ionlarini yutilishi psevdo-ikkinchi tartibli kinetik modelga bo‘ysunishini ko‘rsatdi. Qo‘rg‘oshin maksimal yutilish sig‘imi 76,125 mg/g ni tashkil qilgan. Muvozanat holatidagi adsorbsiya mexanizmini ifodalash uchun Lengmyur va Freundlix izoterma modellaridan foydalanildi. Olingan natijalar asosida hisoblab topilgan izoterma parametrlari (R2=0,9333 va R2=0,9281) qiymati barcha izoterma modellariga mos kelganligi aniqlandi. Freundlix parametrlari qiymatiga ko‘ra n=2,74 bo‘lib, bu esa sorbsiya yuqori darajada borganligini ko‘rsatadi. Lengmyur tenglamasi bo‘yicha korrelatsion koeffitsiyenti R2 qiymati Pb(II) ionlari uchun 0,9333 ga teng va konsentratsiya o‘zgarishi adsorbsiya jarayoni Lengmyur monomolekulyar adsorbsiya nazariyasiga bo‘ysunishini (RL - qulay bo‘lishi) ko‘rsatadi. Bu esa faollangan soch tolalariga Pb(II) ionlari sorbsiyalanishini ko‘rsatadi.

  • Web Address
  • DOI10.56292/SJFSU/vol28_iss4/a49
  • Date of creation in the UzSCI system 09-11-2022
  • Read count 321
  • Date of publication 08-11-2022
  • Main LanguageO'zbek
  • Pages240-244
Ўзбек

Ushbu ishda biologik chiqindi polimer hisoblangan soch tolalariga sun’iy eritmalar tarkibidagi qo‘rg‘oshin ionlarini yutilish kinetikasi o‘rganilgan. Bunda psevdo-birinchi va ikkinchi tartibli kinetik modellar yordamida kinetika o‘rganilgan bo‘lib, olingan natijalar faollangan soch tolalariga Pb(II) ionlarini yutilishi psevdo-ikkinchi tartibli kinetik modelga bo‘ysunishini ko‘rsatdi. Qo‘rg‘oshin maksimal yutilish sig‘imi 76,125 mg/g ni tashkil qilgan. Muvozanat holatidagi adsorbsiya mexanizmini ifodalash uchun Lengmyur va Freundlix izoterma modellaridan foydalanildi. Olingan natijalar asosida hisoblab topilgan izoterma parametrlari (R2=0,9333 va R2=0,9281) qiymati barcha izoterma modellariga mos kelganligi aniqlandi. Freundlix parametrlari qiymatiga ko‘ra n=2,74 bo‘lib, bu esa sorbsiya yuqori darajada borganligini ko‘rsatadi. Lengmyur tenglamasi bo‘yicha korrelatsion koeffitsiyenti R2 qiymati Pb(II) ionlari uchun 0,9333 ga teng va konsentratsiya o‘zgarishi adsorbsiya jarayoni Lengmyur monomolekulyar adsorbsiya nazariyasiga bo‘ysunishini (RL - qulay bo‘lishi) ko‘rsatadi. Bu esa faollangan soch tolalariga Pb(II) ionlari sorbsiyalanishini ko‘rsatadi.

Русский

В данной работе изучена кинетика cорбции ионов свинца (II) из искусственных растворов на волокнами волос, которые являются биологический отходным полимеров. В данном случае кинетика изучалась с использованием кинетических моделей псевдо-первого и второго порядка, и результаты показали, что поглощение ионов Pb(II) в активированных волосяных волокнах подчиняется кинетической модели псевдо-второго порядка. Максимальная адсорбционная способность свинца составила 76,125 мг/г.
Для представления механизма адсорбции при равновесии использовались изотермические модели Ленгмюра и Фрейндлиxа. На основании полученных результатов было установлено, что значения расчетных параметров изотермы (R2=0,9333 и R2=0,9281) соответствуют всем моделям изотерм. Значение параметра Фрейндлиха равно n = 2,74, что указывает на высокую сорбцию. Согласно уравнению Ленгмюра коэффициент корреляции R2 для ионов Pb(II) равен 0,9333, а изменение концентрации свидетельствует о том, что процесс адсорбции подчиняется Ленгмюровской теории мономолекулярной адсорбции (RL). Это указывает на сорбцию ионов Pb(II) активированными волокнами волос.

English

In this work, we studied the sorption kinetics of lead (II) ions from artificial solutions on hair fibers, which are biological waste polymers. In this case, the kinetics were studied using pseudo-first and second-order kinetic models, and the results showed that the uptake of Pb (II) ions in activated hair fibers follows a pseudo-second order kinetic model. The maximum adsorption capacity of lead was 76.125 mg/g. The isothermal models of Langmuir and Freundliсh were used to represent the mechanism of adsorption at equilibrium. Based on the results obtained, it was found that the values of the calculated isotherm parameters (R2=0.9333 and R2=0.9281) correspond to all isotherm models. The value of the Freundlich parameter is n=2.74, which indicates a high sorption. According to the Langmuir equation, the correlation coefficient R2 for Pb(II) ions is 0.9333, and the change in concentration indicates that the adsorption process obeys the Langmuir theory of monomolecular adsorption (RL). This indicates the sorption of Pb(II) ions by activated hair fibers.

№ Name of reference
1 1. Rether A., Schuster M. Selective separation and recovery of heavy metal ions using water-soluble N- benzoylthiourea modified PAMAM polymers //Reactive and Functional Polymers. – 2003. – Т. 57. – №. 1. – С. 13-21.
2 2. Malvin Moyo, Vusumzi Emmanuel Pakade, Sekomeng Johannes Modise Biosorption of lead(II) by chemically modified Mangifera indica seed shells: Adsorbent preparation, characterization and performance assessment //Process Safety and Environmental Protection 1 1 1 ( 2 0 1 7 ) 40–51
3 3. A.G. Ghomi, N. Asasian-Kolur, S. Sharifian, A. Golnaraghi, Biosorption for sustainable recovery of precious metals from wastewater, J. Environ. Chem. Eng. (2020) 103996, https://doi.org/10.1016/j.jece.2020.103996.
4 4. X.H. Xu, B. Bai, H.L. Wang, Y.R. Suo, Synthesis of human hair fiber-impregnated chitosan beads functionalized with citric acid for the adsorption of lysozyme, RSC Adv. 7 (2017) 6636–6647, https://doi.org/10.1039/C6RA26542A.
5 5. Dan Yu, Shintaro, Morisada, Hidetaka, Kawakita, Koichi Sakaguchi ,Satoshi Osada, Keisuke Ohto, Katsutoshi, Inoue, Xi - Ming Song, Guolin Zhang, Ramachandra Rao Sathuluri / Gold recovery from precious metals in acidic media by using human hair waste as a new pretreatment-free green material// Journal of Environmental Chemical Engineering 9 (2021) 104724
6 6. Akpor O. B., Ohiobor G. O., Olaolu D. T. Heavy metal pollutants in wastewater effluents: sources, effects and remediation //Advances in Bioscience and Bioengineering. – 2014. – Т. 2. – №. 4. – С. 37-43.
7 7. Кинетика сорбции ионов Co (II) из растворов на анионообменника // Universum: химия и биология : электрон. научн. журн. Бабожонова Г.К. [и др.]. 2021. 10(88).
8 8. Ho Y.S, McKay G. Pseudo-second order model for sorption processes. Process Biochemistry, 1999; 34: 451– 465. https://doi.org/10.1016/S0032-9592(98)00112-5
9 9. Kumar, P. S., Vincent, C., Kirthika, K., & Kumar, K. S. (2010). Kinetics and equilibrium studies of Pb2+ in removal from aqueous solutions by use of nano-silversol-coated activated carbon. Brazilian Journal of Chemical Engineering, 27(2), 339–346. https://doi.org/10.1590/s0104-66322010000200012
10 10. Kara, A.; Demirbel, E. Kinetic, Isotherm and Thermodynamic Analysison Adsorption of Cr(VI) Ions from Aqueous Solutions by Synthesis and Characterization of Magnetic-Poly (divinylbenzene-vinylimidazole) Microbeads Water Air Soil Pollut(2012) 223:2387–240 doi:10.1007/s11270-011-1032-1.
Waiting