دوره 27، شماره 3 - ( 7-1398 )                   جلد 27 شماره 3 صفحات 597-608 | برگشت به فهرست نسخه ها


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Rabiei N, Hashemi S S. Microstructure and chemical changes of sepiolite and vermiculite clays on the effect of elements adsorption. www.ijcm.ir. 2019; 27 (3) :597-608
URL: http://ijcm.ir/article-1-1329-fa.html
ربیعی نگین، هاشمی سهیلا سادات. تغییرات شیمیایی و ریزساختاری رس‌های سپیولایت و ورمی‌کولایت در اثر جذب عناصر نیکل و روی. مجله بلورشناسی و کانی شناسی ایران. 1398; 27 (3) :597-608

URL: http://ijcm.ir/article-1-1329-fa.html


دانشگاه ملایر
چکیده:   (747 مشاهده)
از روش­های کنترل آلودگی فلزات سنگین، استفاده از کانی­های رسی به عنوان جاذب است. در این پژوهش، ویژگی­های ریزساختاری کانی­های سپیولیت و ورمی­کولیت پس از جذب عناصر نیکل و روی بررسی شد. جهت انجام آزمایش جذب، از چهار تیمار ورمی­کولیت، ورمی­کولیت + خاک شنی، سپیولیت و سپیولیت + خاک شنی با شش غلظت 0، 0001/0، 0005/0، 005/0، 01/0 و 05/0 مولار محلول روی و نیکل استفاده شد. نتایج هم­دماها­ی جذب نشان داد که عنصر نیکل، با معادله لانگ­مویر و عنصر روی با معادله فروندلیچ­ برازش بهتری داشتند. افزون بر آن، عنصر نیکل در رس سپیولیت و عنصر روی در رس ورمی­کولیت با جذب بیشتری همراه بودند. نتایج پراش پرتوی ایکس­ نشان داد که با افزایش غلظت آلاینده روی و نیکل، صفحات کانی از هم فاصله گرفته و در نتیجه ساختار کانی دچار تغییر شده است. به­طور کلی نتیجه­گیری می­شود که هر دو رس نقش بسیاری در جذب آلاینده­ها داشته و ریزساختار آنها عامل اصلی این سازوکار است.     
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نوع مطالعه: پژوهشي | موضوع مقاله: تخصصي
دریافت: 1398/7/13 | پذیرش: 1398/7/13 | انتشار: 1398/7/13

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