Modified clay as new absorbent for removal anions from aquaculture recirculation effluent

  • سال انتشار: 1389
  • محل انتشار: دومین کنفرانس بین المللی زئولیت ایران
  • کد COI اختصاصی: ZEOLITE02_019
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 2145
دانلود فایل این مقاله

نویسندگان

Zoheir Shokouh Saljoghi

Departemant of Fisheries and Environmental Science, Faculty of Natural Resources, University of Tehran

Gholamreza Rafiee

Departemant of Fisheries and Environmental Science, Faculty of Natural Resources, University of Tehran

Akbar Malekpour

Department of Chemistry, Isfahan University, Department of Chemistry, Isfahan University

چکیده

clays have been increasingly acknowledged due to their capability of removing toxic ions even at lower concentrations which are common in aquaculture effluent. Contaminants in aquaculture effluent such as Phosphate and sulphate can promote eutrophication of receiving waters and be potentially toxic to aquatic life. Natural bentonite can remove cations and heavy metals from wastewater. At the present study the natural bentonite and surfactant modified bentonite (SMB) was characterized using XRD analyses. To remove anions from samples, modification was practiced with tetradecyletrimethyleammoniumbromid (TDTMA) to increase the adsorption of anions which subsequently increases the ion absorption capacity of bentonite per se. These systems are still in their infancy and there is not enough information in this regard. Present study aimed to have more insight into the effects of different ambient pHs (6, 6.5, 7, 7.5 and 8) and temperatures (10, 15 and 20 ?C) on the ion adsorption capability of modified bentonite. Results showed that these parameters affected ion absorption. pH has a prominent effect on the ion adsorption to the extent that increasing pH improves the anion adsorption, about nitrite the best adsorption was at neutral pH (48.128), in the case of nitrate increasing pH cause increase in adsorption. Like pH, temperature has positive effect on ion adsorption. It seems that activated surface layer has better tendency to nitrite anion. Surfactant modified bentonite can be used as a new absorbent for toxic anions from aquaculture wastewater.

کلیدواژه ها

aquaculture wastewater, modified bentonite, organoclay, Harmful anions surfactant, TDTMA

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.