دوره 27، شماره 3 - ( 7-1398 )
جلد 27 شماره 3 صفحات 608-597 |
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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
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
1- دانشگاه ملایر
چکیده: (2938 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.
واژه‌های کلیدی: جذب، فاصله بین‌لایه‌ای، آلاینده، کانیهای رسی.
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