بررسی توانایی برگ گیاه سیر و جاذب‌‌های سلولزی استخراج شده از گیاه گلرنگ در حذف یون‌‌های کادمیم از محلول‌‌های آبی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه جیرفت

2 دانشگاه جیرفت٬

چکیده

 
 
در این مطالعه توانایی پودر برگ گیاه سیر برای جذب کادمیم از فاضلاب صنعتی بررسی و اثر فاکتورهای pH، غلظت برگ سیر و غلظت اولیه فلز کادمیم در محلول‌‌های آبی بر درصد جذب و ظرفیت جذب این فلز تعیین شد. محدوده pH، غلظت برگ سیر و غلظت اولیه فلز کادمیم به ترتیب، 8-2، g/l 4-1/0 وmg/l  300-50 بودند. براساس نتایج در pH برابر 5، غلظت برگ سیر g/l 1/0 و غلظت یون‌‌های کادمیمmg/l  100 بالاترین درصد جذب 63/45% و ظرفیت جذب mg/g 25/6 به دست آمد. استفاده از جاذب‌‌های شیمیایی سنتز شده شامل سلولز، سلولز آلدییددار شده، سلولزآمین‌‌دار، سلولز استات‌‌دار و ۲ـ آمینو پیریدین تثبیت شده بر روی سلولز نیز نشان داد که هر چند میزان حذف یون‌‌های کادمیم توسط این مواد سنتزی چند درصد بالاتر از پودر برگ سیر بود اما ظرفیت جذب پایین‌‌تر این مواد نشانگر کارایی بالای پودر برگ سیر برای حذف یون‌‌های فلز کادمیم از محلول‌‌های آبی است. بنابراین، استفاده از پودر برگ سیر به عنوان جاذبی بیولوژیکی و بی‌‌خطر در محیط‌‌زیست راهکاری مناسب و حدود 50 درصد آلودگی کادمیم را در جریان‌‌های صنعتی جذب و خطر آن را کاهش خواهد داد.

کلیدواژه‌ها

عنوان مقاله [English]

Investigating the Ability of Garlic Leaves and Extracted Celluloses From Carthamus Tinctorius to Remove Cadmium Ions From Aqueous Solutions

نویسندگان [English]

  • Malihe Amini 1
  • Atena Naeimi 2
1 University of Jiroft,
2 University of Jiroft,
چکیده [English]

In this study, potential of garlic leaves powder to biosorption of cadmium from industrial wastewater effluent was investigated. The effects of pH, biomass dose and initial concentration of cadmium on the removal of biosorption and uptake capacity were examined. Range of pH, biomass dose and initial concentration of cadmium were 2-8, 0.1-4 g/l and 50-300 mg/l, respectively. According to results, the most cadmium removal (45.63%) and uptake capacity (6.25 mg/g) were obtained in pH of 5, biomass dose of 0.1 g/l and initial cadmium concentration of 100 mg/l. The use of synthesized chemical adsorbents including cellulose, aldehyde functionalized cellulose, amino functionalized cellulose, acetate cellulose and 2-amino pyridine supported on cellulose also were shown that the percentage of removal of cadmium ions by these synthetic materials were a few percentage higher from garlic leaves powder. But, the lower absorption capacity of these materials indicates the high performance of garlic leaf powder to remove heavy metal ions from aqueous solutions. Therefore, use of garlic leaves powder as a biological biosorption is the appropriate candidate and will reduce about 50% the risk of cadmium contamination in industrial streams. 

کلیدواژه‌ها [English]

  • Garlic leaf
  • Cellulose
  • Cadmium
  • Carthamus tinctorius
  • Wastewater

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پژوهش های محیط زیست
دوره 10، شماره 19
شهریور 1398
صفحه 235-244

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