کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1636979 1516965 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bioleaching of heavy metals from contaminated alkaline sediment by auto- and heterotrophic bacteria in stirred tank reactor
ترجمه فارسی عنوان
بیوفیلتر کردن فلزات سنگین از رسوب قلیایی آلوده با باکتری های خودکار و هتروتروف با استفاده از راکتور مخزن
کلمات کلیدی
زباله رسوب قلیایی، فلزات سنگین، استخراج متوالی، باکتری های خودکار و هتروتروفیک،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
Bioleaching Xiangjiang River alkaline sediment contaminated by multiple heavy metals was investigated. Multiple metals in alkaline sediment possess significant toxicity to aquatic organisms or humans and will greatly inhibit bioleaching. The bioleaching method using autotrophic bacteria mixed with heterotrophic bacteria can solve this problem successfully. The experiment results showed that bioleaching efficiencies of Zn, Mn, Cu, and Cd were 95.2 %, 94.2 %, 90.1 %, and 84.4 %, respectively. Moreover, the changes of heavy metal concentrations in different fractions in contaminated sediment before and after bioleaching were analyzed by selective sequential extraction, and it was discovered that the main fractions of Zn, Mn, Cu and Cd after bioleaching are Fe-Mn oxide, organic associated form and a residual form. Its biotoxicity decreased greatly. The bioleaching heavy metals from sediment using autotrophic bacteria combined with heterotrophic bacteria can effectively improve the bioleaching efficiency and reduce toxicity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 24, Issue 9, September 2014, Pages 2969-2975
نویسندگان
, , , , , , , , ,