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جذب سطحی آنیون سیانید از محلولهای آبی با استفاده از نانوجاذب اکسید روی | ||
تحقیقات آب و خاک ایران | ||
دوره 52، شماره 6 - شماره پیاپی 66، شهریور 1400، صفحه 1685-1696 اصل مقاله (967.01 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2021.312909.668792 | ||
نویسندگان | ||
مهدی قنات رو1؛ حسین محمدی منش* 1؛ اعظم السادات قرقچیان1؛ حسین دشتی خویدکی2؛ سید رضا فانی3 | ||
1دانشکده شیمی، پردیس علوم، دانشگاه یزد، یزد، ایران | ||
2گروه شیمی، دانشکده علوم پایه، دانشگاه آیت الله بروجردی، بروجرد، ایران | ||
3بخش تحقیقات گیاهپزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان یزد، سازمان تحقیقات، آموزش و ترویج کشاورزی، یزد، ایران | ||
چکیده | ||
در این تحقیق، جذب سطحی آنیون سیانید از محلولهای آبی بر روی نانوذرات اکسید روی و عوامل مؤثر بر آن مورد مطالعه قرار گرفته است. این عوامل شاملpH اولیه محلول، غلظت اولیه یون سیانید در محلول، مقدار جاذب، مدت زمان تماس و دما میباشند. شرایط بهینه جذب آنیون سیانید بر روی نانوجاذب اکسید روی عبارتند از: 6pH=، زمان تماس80 دقیقه، مقدار جاذب 07/0 گرم، دمای 15 درجه سلسیوس و غلظت اولیه 250 میلیگرم بر لیتر. تحت این شرایط بهینه، بیشترین درصد جذب آنیون سیانید بر روی نانوذرات اکسید روی 96 درصد بهدست آمد. همچنین، نتایج نشان داد که برازش دادههای تجربی با همدمای لانگمویر نسبت به همدماهای فروندلیچ و تمکین سازگاری بیشتری با فرایند جذب سطحی دارد و حداکثر ظرفیت جذب در این فرایند برابر با 85/24 میلیگرم بر گرم جاذب است. به علاوه، مطالعات سینتیکی نشان داد که جذب سطحی آنیون سیانید بر روی نانوجاذب اکسید روی، مرتبه دوم است. | ||
کلیدواژهها | ||
آنیون سیانید؛ جذب سطحی؛ نانوجاذب؛ نانوذرات اکسید روی؛ همدماهای جذب سطحی | ||
عنوان مقاله [English] | ||
Adsorption of Cyanide Anion from Aqueous Solutions Using Zinc Oxide Nano-adsorbent | ||
نویسندگان [English] | ||
Mahdi Ghanatroo1؛ Hossein Mohammadi-Manesh1؛ Azamsadat Ghoroghchian1؛ Hossein Dashti Khavidaki2؛ Seyed Reza Fani3 | ||
1Department of Chemistry, Faculty of Sciences, Yazd University, Yazd, Iran | ||
2Department of Chemistry, Faculty of Basic Sciences, Ayatollah Boroujerdi University, Boroujerd, Iran | ||
3Plant Protection Research Department, Yazd Agricultural and Natural Resources Research and Education Center, AREEO, Yazd, Iran | ||
چکیده [English] | ||
Adsorption of cyanide ion from aqueous solutions using zinc oxide nanoparticles and the affecting factors such as pH, concentration of cyanide ion, adsorbent dosage, contact time and temperature have been studied in this paper. The optimal conditions for adsorption of cyanide anion on nano zinc oxide were obtained at pH=6, contact time 80 min, adsorbent dosage 0.07g, temperature 15°C and initial concentration of 250 mg/l. Under these optimal conditions, the highest percentage of adsorption of cyanide was obtained to be 96%. Moreover, the results showed that experimental data is best fitted with Langmuir isotherm equation rather than Freundlich and Temkin isotherms. The maximum adsorption capacity obtained about 24.85 mg/g. In addition, kinetic studies showed that the adsorption of cyanide anion on nano-adsorbent zinc oxide complied well with second-order kinetics model. | ||
کلیدواژهها [English] | ||
Cyanide anion, Adsorption, Nano-adsorbent, Zinc oxide nanoparticles, Adsorption isotherms | ||
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