اثرات بور بر محیط زیست و روش‌های حذف آن از محلول‌های آبی

محورهای موضوعی : آلودگی محیط زیست (آب و فاضلاب)

شهره عسگری ¹ , اعظم منفرد ² , مهرداد فلاح ³

1 - دکتری شیمی، دانشکده شیمی، دانشگاه پیام نور، تهران، ایران. *(مسوول مکاتبات)
2 - استادیار، دانشکده شیمی، دانشگاه پیام نور، تهران ، ایران.
3 - دکتری شیمی، دانشکده شیمی، دانشگاه پیام نور، تهران، ایران.

تاریخ دریافت : 1395/12/25 تاریخ پذیرش : 1396/02/16 تاریخ انتشار : 1397/10/01

کلید واژه: بور, محیط زیست, حذف بور,

چکیده مقاله :

بور (بورون) میکرو مغذی بسیار مهمی برای گیاهان و حیوانات می باشد، بدین معنی که مقادیر بسیار کم بور برای رشد آن ها لازم و ضروری است. این عنصر بسیار مورد توجه است، زیرا هم کمبود آن و هم مازاد آن برای بسیاری از گیاهان مضر است و فاصله بین این دو مقدار بسیار محدود است. در انسان ها نیز مقادیر بسیار کمی از بورون در تمام بافت ها وجود دارد، اما مقدار اضافی بور ممکن است منجر به آسیب سیستم عصبی شود، از این جهت در بسیاری از کشورها غلظت بور در آب آشامیدنی و فاضلاب کنترل می شود. مقدار مجاز بور در آب آشامیدنی طبق توصیه سازمان بهداشت جهانی(WHO)[1]مقدار5/0 است و بر این اساس، حذف بور از محلول های مایی و آب ها یکی از دغدغه های بزرگ بهداشت عمومی و محیط زیستی می باشد. اخیرا روش های مختلفی برای جداسازی بور از آب در حال توسعه هستند که از بین این روش ها، فرآیندهای جذبی، فرآیندهای غشایی، فرآیندهای هیبریدی کارامدتر هستند. ما دراین مقاله، اطلاعاتی در مورد بور-خواص آن منابع آن، تاثیر آن بر محیط زیست، گیاهان و حیوانات و روش های جدیدی برای حذف آن ارایه می کنیم. [1]-World Health Organization

چکیده انگلیسی:

Boron is very important micronutrient for plants and animals, which menas essential for growth of them in very small quantities. This is the element of special attention as its deficiency and excess are harmful for many plants and the gap between both these level is very narrow. In humans, small amount of boron occur in all tissues but an excess of boron may lead to damage of nervous system. Therefore, boron concentration in drinking water and wastewater is regulated in many countries. The recommended boron content in drinking water according to world health organization (WHO) guideline is 0.5 and according to this limit, the removal of boron from aqueous solution and water is of great environmental and health public health concern. Recently different methods to separate boron from water have been developed. Among them the more effective methods are adsorption processes, membrane processes and hybrid processes. In this manuscript, we presenting knowledge on boron, its properties, sources, effects on environment, plants, animals and new methods for its removal.

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