طراحی و بهینه‌سازی جذب فلز سنگین کروم (VI) از محلول‌های آبی توسط ذرات پوست میوه تمبرهندی فعال شده با اسیدسولفوریک

آب و خاک

مقاله 4، دوره 32، شماره 5 - شماره پیاپی 61، زمستان 1397، صفحه 891-904  

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jsw.v32i5.64308

نویسندگان

مرتضی شاهمرادی ؛ امیر تائبی؛ هستی هاشمی نژاد

دانشگاه صنعتی اصفهان

چکیده

در این تحقیق، میزان پتانسیل حذف فلز سنگین کروم (VI) از محلول­های آبی توسط پوسته میوه تمبرهندی اصلاح شده با اسیدسولفوریک بررسی شد. روش سطحی پاسخ بر اساس روش D-optimal برای بهینه­سازی جذب کروم (VI) توسط ذرات پوسته میوه تمبرهندی اصلاح شده به کار رفت. پنج متغیر مستقل از جمله، دز جاذب برابر (1-7g/L)، سرعت لرزاننده (شیکر) برابر (50-200rpm)، pH اولیه محلول برابر (10-1)، غلظت اولیه محلول کروم (VI) برابر ((5-150mg/L و زمان تماس برابر (30-120min) برای پیش­بینی بازدهی حذف فلز سنگین کروم (VI) به کار رفت. اهمیت متغیرهای مستقل و تقابل آنها توسط آنالیز واریانس (ANOVA) بررسی شد. با استفاده از بهینه­سازی به مقادیر بهینه دز جاذب برابر 3g/L، سرعت لرزاننده برابر 200rpm، pH برابر 1، غلظت محلول کروم برابر 150mg/L و زمان تماس برابر 90min به بیشینه ظرفیت جذب محلول کروم (VI) برابر 23mg/g دسترسی پیدا کردیم؛ نتایج آزمایشات جذب با مدل ایزوترم فرندلیچ سازگاری بیشتری داشت.

کلیدواژه‌ها

پوسته میوه تمبرهندی؛ محلول کروم 6 بار مثبت؛ D-optimal؛ بهینه سازی؛ روش رویه پاسخ

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