TY - JOUR ID - 999 TI - Performance of keratin nanoparticle and its magnetic nanocomposite for Zn(II) removal from its aqueous solution JO - Advances in Environmental Technology JA - AET LA - en SN - 2476-6674 AU - Mousavi, Seyedeh Zahra AU - Manteghian, Mehrdad AU - Ahmadpoor, Fatemeh AD - Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran AD - Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran Y1 - 2020 PY - 2020 VL - 6 IS - 1 SP - 37 EP - 45 KW - Keratin nanoparticles KW - Magnetic keratin KW - Zn(II) removal KW - adsorption isotherm KW - Adsorption kinetic DO - 10.22104/aet.2021.4406.1235 N2 - The comparative sorption studies were carried out to investigate the performance of keratin nanoparticles (KNPs) and magnetic KNPs (MKNPs) for Zn(II) uptake. MKNPs showed remarkably higher Zn(II) removal due to the lower keratin weight percent in its structure (8.4%). MKNPs revealed relatively uniform Zn(II) removal within pH range between 4.0 to 6.0 at the temperature of 25°C rather than KNPs. Both KNP and MKNP exhibited two-stage kinetic behavior and reached to their equilibrium adsorption capacity within 30 min. The adsorption of Zn(II) on KNPs and MKNPs followed pseudo second order kinetic model. It was found that the experimental data were best fitted to Sips or Redlich-Peterson isotherm when KNP was used as biosorbent. Unlike KNP, MKNP conformed better to Langmuir model. The maximum adsorption capacity of MKNP at two doses of 3.0 and 5.0 g/L was calculated to be 30 and 18 mg/g, respectively. As the dosage of MKNP raised from 3.0 to 5.0 g/L, the value of KL increased from 0.045 L/mg to 0.154 L/mg, confirming more biosorbent tendency to adsorb metal ions.  UR - https://aet.irost.ir/article_999.html L1 - https://aet.irost.ir/article_999_ffc73063706afc0915ac33b630af220a.pdf ER -