tailieunhanh - Biosorption of copper ions by caustic treated waste Baker’s yeast biomass

Waste baker’s yeast (Saccharomyces cerevisiae) was used as a biosorbent for Cu+2 biosorption. The yeast cells were treated with caustic soda, ethanol and heat to increase their biosorption capacity. Among the treatment methods used, the highest copper uptake ( mg g-1) was obtained with the caustic treatment of baker’s yeast. | Turk J Biol 27 (2003) 23-29 © TÜB‹TAK Biosorption of Copper Ions by Caustic Treated Waste Baker’s Yeast Biomass Yekta GÖKSUNGUR, Sibel ÜREN, Ulgar GÜVENÇ* Department of Food Engineering, Faculty of Engineering, Ege University, 35100 Bornova, ‹zmir - TURKEY Received: Abstract: Waste baker’s yeast (Saccharomyces cerevisiae) was used as a biosorbent for Cu+2 biosorption. The yeast cells were treated with caustic soda, ethanol and heat to increase their biosorption capacity. Among the treatment methods used, the highest copper uptake ( mg g-1) was obtained with the caustic treatment of baker’s yeast. The effect of initial copper concentration and pH on biosorption for caustic treated yeast was studied. The highest Cu+2 uptake ( mg g-1) was obtained at pH , for mg l-1 initial copper ion concentration. The Langmuir model and Freundlich equation were applied to the experimental data and the Langmuir model was found to be in better correlation with the experimental data. The Langmuir constants were qmax (mg g-1) = and b (l mg-1) = . In packed bed column studies with calcium alginate immobilized caustic treated yeast, it was found that the real biosorption capacity came from the alginate gel and immobilizing caustic treated yeast particles in the gel only slightly increased the biosorption capacity of the gel. Key Words: copper, biosorption, Saccharomyces cerevisiae, adsorption isotherms, calcium alginate, immobilization Kostikle Muamele Edilmifl At›k Ekmek Mayas› Hücrelerine Bak›r ‹yonlar›n›n Biyosorpsiyonu Özet: Bu çal›flmada at›k ekmek mayas› (Saccharomyces cerevisiae) hücreleri Cu+2 geri kazan›m› için biyosorbant olarak kullan›lm›flt›r. Maya hücreleri NaOH, etil alkol ve ›s› ile muamele edilerek biyosorpsiyon kapasiteleri art›r›lmaya çal›fl›lm›fl ve bu yöntemler aras›nda en yüksek bak›r kazan›m› ( mg g-1) ile kostikle muamele edilmifl ekmek mayas› hücrelerinden elde edilmifltir. Kostikle muamele edilmifl maya hücreleri .

• Sinh học
• Saccharomyces cerevisiae
• Adsorption isotherms
• Calcium alginate
• Treatment methods
• Autolytic enzymes
• RGT saccharomyces cerevisiae
• Prebiotic MOS
• Isolation and characterization
• Rabbit gut transmitted Saccharomyces cerevisiae
• Lên men rượu vang vải thiều
• Chủng nấm men Saccharomyces Cerevisiae LC3
• Saccharomyces Cerevisiae LC3
• Quá trình lên men rượu vang vải
• Phòng thí nghiệm vi sinh
• Tạp chí Công nghệ Sinh học
• Bài viết về sinh học
• Cải biến chủng
• Chủng nấm men Saccharomyces cerevisiae D8
• Lentinula edodes
• PCRRFLP and SDSPAGE
• Saccharomyces cerevisiae and Lentinula edodes
• Region based diversity studies
• Sử dụng Saccharomyces cerevisiae rv002
• Men rượu vang từ quả sim
• Saccharomyces cerevisiae RV002
• Phần mềm SPSS
• Hiệu quả lên men
• Agricultural science
• Protein enrichment of yam peels
• Fermentation with Saccharomyces cerevisiae
• Proximate composition
• Tạp chí khoa học
• Sàng lọc chủng nấm men Saccharomyces Cerevisiae
• Khả năng tích lũy kẽm cao
• Chủng nấm men
• Chủng nấm men S
• cerevisiae
• Scientific reports
• scientific research
• Structural biochemistry
• decarboxylase
• biochemical studies
• khả năng hấp thu
• kim loại nặng
• nấm men Saccharomyces cerevisiae
• hóa học môi trường
• đề tài nghiên cứu
• nghiên cứu khoa học
• breast cancer
• medicine
• phosphatidate
• medical knowledge
• biochemistry
• Saccharomyces cerevisiae H2 RNase
• cytoplasm
• analysis of cytoplasmic
• báo cáo khoa học
• enzyme amylase
• SẢN XUẤT MEN RƯỢU
• Đồng bằng sông Cửu Long
• α amylase
• β−glucanase
• Bacillus subtilis
• Gene cloning
• Công nghệ sinh học
• Môi trường nhân giống
• Chủng Saccharomyces cerevisiae MS42
• Qúa trình sinh trưởng của nấm men
• Lactobacillus acidophilus
• Simulated gastric juice
• Tạp chí sinh học
• Intergenic sequences
• Sense and antisense sequences
• Nghiên cứu quy trình tách chiết Beta glucan
• Quy trình tách chiết Beta glucan
• Quy trình tách chiế
• Tế bào Saccharomyces Cerevisiae
• Bã men bia
• Osmotic stress
• Oxidative stress
• Transcriptional repression
• Enzyme invertase
• Glucose sensing
• Glucose uptake
• Yeast cells
• Cyclin dependent protein
• Cytoplasmic sensor proteins
• Glucose repression
• Hexose transporters
• Non histone proteins
• HXT4 gene
• Thioredoxin reductase
• Methionine sulfoxide
• TRX2 genes
• Thioredoxin system
• Tạp chí Đại học công nghiệp thực phẩm
• Tinh dầu quế
• Saccharomyces cerevisiae và aspergillus niger
• Phương pháp khuếch tán
• Phương pháp ức chế hệ sợi
• Yeast protoplasts
• Auxotroph strains DC6
• Inhomogeneous alternating
• Polyethylene glycol
• Hexokinase PII
• SUC2 gene
• Gcr2 and Sgc1 mutants
• Ampicillin activates
• CWI pathway
• Candida albicans
• MAP kinase 1