Biosorption of methylene blue by modified cystoseira barbata (stackhouse) C. Agardh

Bu çalışmada, sulu çözeltide bulunan metilen mavisi (MM) boyar maddesinin modifiye edilmiş (0,1M HNO3 ve 1M HNO3 ile) Cystoseira barbata kullanılarak giderilmesine çalışılmıştır. Adsorpsiyona, pH’ın, temas süresinin, farklı derişimlerde bulunan MM çözeltisinin etkileri incelenmiştir. Çalışma sonucunda, ilk 50dk. içerisinde sistemin dengeye geldiği ve adsorpsiyon kapasitesinin pH değişiminden pek etkilenmediği gözlemlenmiştir. Yapılan izoterm çalışmalarında ise, Freundlich izoterm modeline daha çok uyduğu belirlenmiş ve qmax değeri 0,1M HNO3 grubunda daha yüksek (100,6mg/g) bulunmuştur. Yapılan SEM ve FTIR analizlerinde ise, MM boyar maddesinin alg yüzeyinde meydana getirdiği değişikler ve alg yüzeyinde hangi gruplara tutunduğu belirlenmiştir.In this study, methylene blue (MB) dye in aqueous solution was tried to be removed by using modified Cystoseira barbata (with 0.1M HNO3 and 1M HNO3). The effects of pH, contact time and different MB concentrations on adsorption were investigated. The results showed that the system reached to equilibrium in the first 50min and pH had no significant effect on adsorption capacity. In the isotherm studies, the Freundlich isotherm model was found to be more suitable and the qmax value was higher in the 0,1M HNO3 group (100.6mg/g). The changes in the algae surface caused by MB and the groups on the algae surface that the dye attached were determined in SEM and FTIR analysis

Adsorption and Kinetic Studies of Methylene Blue from Aqueous Solution Using Modified Spent Tea Leaves

In this study, methylene blue was removed from an aqueous solution using modified waste tea leaves. Temperature, pH, contact time, methylene blue concentration, and other adsorption mechanisms were studied. The characterization of the samples was performed using the FTIR and SEM analyses. The isotherm models were carrying out to analyzed the adsorption mechanisms and for representing data, the Freundlich isotherm model seemed more appropriate. The findings exhibited the highest adsorption capacity was 3.66 mg/g for the untreated biomass at 298 K, 5.46 mg/g for the 0.1 M HCl group at 318 K, and 5.98 mg/g for the 0.05 M NaOH group at 298 K. The adsorption kinetics were used and the pseudo-second-order model performed well for each group. As a natural substitute biomass for methylene blue adsorption from aqueous solution, used tea leaf residue may be employed

Removal of methylene blue from aqueous solutions by brown alga Cystoseira barbata

The removal of dyes from wastewater is crucial and considered an environmental challenge. Biosorption is an alternative technology to conventional processes aiming at the removal of toxic metals and dyes from polluted waters. In this study, Cystoseira barbata (Stackhouse) C. Agardh was used to remove the methylene blue (MB) from aqueous solution. The effects of solution pH, contact time and initial MB concentration at different temperatures were investigated. The adsorption reached to equilibrium in 25 min and the pH did not have an important role on the biosorption. The Freundlich isotherm model showed slightly stronger correlation than Langmuir isotherm model especially at 25 degrees C. The maximum adsorption capacity (q(m)) increased in parallel to the rise of temperature and reached to 14.97 mg/g at 45 degrees C. C. barbata can be successfully used for the removal of MB from aqueous solution

Removal of methylene blue from aqueous solutions by brown alga Cystoseira barbata

The removal of dyes from wastewater is crucial and considered an environmental challenge. Biosorption is an alternative technology to conventional processes aiming at the removal of toxic metals and dyes from polluted waters. In this study, Cystoseira barbata (Stackhouse) C. Agardh was used to remove the methylene blue (MB) from aqueous solution. The effects of solution pH, contact time and initial MB concentration at different temperatures were investigated. The adsorption reached to equilibrium in 25 min and the pH did not have an important role on the biosorption. The Freundlich isotherm model showed slightly stronger correlation than Langmuir isotherm model especially at 25 degrees C. The maximum adsorption capacity (q(m)) increased in parallel to the rise of temperature and reached to 14.97 mg/g at 45 degrees C. C. barbata can be successfully used for the removal of MB from aqueous solution