تفاصيل الوثيقة
|
نوع الوثيقة |
: |
مقال في مجلة دورية |
|
عنوان الوثيقة |
: |
Biosorption characteristics of Aspergillus fumigatus in removal of cadmium from an aqueous solution Biosorption characteristics of Aspergillus fumigatus in removal of cadmium from an aqueous solution |
|
الموضوع |
: |
علوم الأحياء |
|
لغة الوثيقة |
: |
الانجليزية |
|
المستخلص |
: |
Nineteen fungal species were isolated from soil contaminated with industrial wastes of which
Aspergillus species were the most dominant. The growth of the isolates was notice by Cd concentration
in growth medium, thus about 20% of the isolates can grow up to 50 mg Cd/100 ml medium and only
Aspergillus fumigatus and Penicillium chrysogenum can grow at 100 mg Cd with growth decrease of
88.2 and 99.4%, respectively. The results revealed that the living biomass of the isolates were more
efficient to biosorb Cd than their dried powdered biomass by 15 - 44%. The formulation of yeast
peptone glucose (YPG) medium fortified the isolates by ingredients favored the best growth yields that
have the highest Cd biosorption, compared to yeast malt extract (YM) and sabourad (Sb) media. The
dried A. fumigatus biomass was the most efficient than other tested fungi. The influence of different
treatments of dried A. fumigatus biomass on its Cd biosorption activity, indicated that 0.5 N NaOH and
autoclaving was the most efficient treatment (3 fold increase as compared to untreated). The
biosorption of Cd by treated A. fumigatus biomass was considerably influenced by the pH value of the
biosorption medium, contact time, biomass levels and Cd concentration. Thus, 98% of Cd was
absorbed in biosorption medium containing 10 mg Cd and 100 mg dried treated biomass/100ml
bidistilled water at pH 5 after 90 min of contact, nitric acid (0.05 N) was the best Cd eluent (99.8%) as
compared to the other eluents. The desorbed A. fumigatus biomass was successfully reused for 5
consecutive times for Cd biosorption with decrease reached to 28% at the 5th reuse. |
|
ردمد |
: |
16845315 |
|
اسم الدورية |
: |
African Journal of Biotechnology |
|
المجلد |
: |
8 |
|
العدد |
: |
17 |
|
سنة النشر |
: |
2009 هـ
2009 م |
|
نوع المقالة |
: |
مقالة علمية |
|
تاريخ الاضافة على الموقع |
: |
Sunday, March 21, 2010 |
|
الباحثون
| صالح محمد القرني | Al-Garni, SALEH Mohamed | باحث | دكتوراه | Saleh-895_4@hotmail.com |
| خالد محمد غانم | Ghanem, Khaled Mohamed | باحث | دكتوراه | kghanem@kau.edu.sa |
| عبدالعزيز باحبيل | Bahobail, Abdulaziz | باحث | ماجستير | |
|
الرجوع إلى صفحة الأبحاث
|