Abstract：
:Thirty-two fungal species were isolated from a polluted watercourse near the Talkha fertilizer plant, Mansoura Province, Egypt. Aspergillus niger, A. flavus, Cunninghamella echinulata and Trichoderma koningii were isolated frequently. On the basis of its frequency, Cunninghamella echinulata was chosen for biosorption studies. Free and immobilized biomass of C. echinulata sequestered ions in this decreasing sequence is: Pb >Cu >Zn. The effects of biomass concentration, pH and time of contact were investigated. The level of ion uptake rose with increasing biomass. The maximum uptake for lead (45 mg/g), copper (20 mg/g) and zinc (18.8 mg/g) occurred at 200 mg/L biomass. The uptake rose with increasing pH up to 4 in the case of Pb and 5 in the case of Cu and Zn. Maximum uptake for all metals was achieved after 15 min. Ion uptake followed the Langmuir adsorption model, permitting the calculation of maximum uptake and affinity coefficients. Treatment of C. echinulata biomass with NaOH improved biosorbent capacity, as did immobilization with alginate. Immobilized biomass could be regenerated readily by treatment with dilute HCl. The biomass-alginate complex efficiently removed Pb, Zn and Cu from polluted water samples. Therefore,Cunninghamella echinulata could be employed either in free or immobilized form as a biosorbent of metal ions in waste water.
journal_name
Mycologiajournal_title
Mycologiaauthors
El-Morsy el-SMsubject
Has Abstractpub_date
2004-11-01 00:00:00pages
1183-9issue
6eissn
0027-5514issn
1557-2536pii
96/6/1183journal_volume
96pub_type
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