Parametric, equilibrium, and kinetic studies on biosorption of diuron byAnabaena sphaericaandScenedesmus obliquus

Abstract

In this study, the bioremoval potential of diuron by the cyanobacterium, Anabaena sphaerica, and the green algae, Scenedesmus obliquus, was investigated under different experimental conditions, including pH, diuron concentrations, contact time, and biomass dosage. Approximately, <80% (40 mg/L) of the analyte was removed by 1 g/L of both species within 80 min at pH = 3. The equilibrium data were well fitted to Langmuir isotherm model, indicating a probable monolayer biosorption of diuron on the biomass surface. Biosorption kinetics was best described by pseudo‐first‐order kinetic model. The biosorption mechanism of diuron over the studied biosorbents was found to be controlled by the external mass transfer. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 504–511, 2015

Hydrothermal Carbonization of Argan Nut Shell: Functional Mesoporous Carbon with Excellent Performance in the Adsorption of Bisphenol A and Diuron

“…Furthermore, the peak located at 1709 cm −1 was attributed to C=O present in the diuron structure. Other peaks appearing between 1000 and 500 cm −1 were assigned to C-H out-of-plane bending vibration of the benzene ring of diuron [80]. This is because the amount of diuron adsorbed was higher on HTC@ANS-200.…”

Temperature and pH influence on Diuron adsorption by Algerian Mont-Na Clay

“…This reflects a kinetic development assuming that adsorption sites increase exponentially with adsorption, which implies multilayer adsorption. While, the equilibrium data were well-adjusted to the Langmuir isothermal model, indicating probably monolayer biosorption of Diuron on Anabaena sphaerica and Scenedesmus obliquus [22]. Table 2.…”

The potential of nonliving Sargassum hemiphyllum as a biosorbent for nickel(II) removal—isotherm, kinetics, and thermodynamics analysis

“…Effect of contact time on the adsorption of nickel(II) was shown in Figure 4, the adsorption capacity increased rapidly in the first 30 min and then tended to reach stable value, indicating that the adsorption of nickel(II) by S. hemiphyllum was a rapid adsorption process, which may be attributed to the reasons: first, a large number of adsorption sites on the algal surface were available for nickel(II) at the initial high concentration gradient [2], second, This may be related to the increase of many binding sites being available in successful collisions of the nickel (II) on the surface [25,43].…”

“…The experiments were carried out in 100 mL Erlenmeyer flasks with 50 mL of the metal solution on a shaking incubator at 200 rpm. Effects of different pH values (2, 3, 4, 5, 6, 7, and 8), the concentrations of biomass (0.5, 1, 2, 3, 4, and 5 g L −1 ), the initial concentrations of nickel(II) (10,50,100,150,200,250,300, and 400 mg L −1 ), contact times (0, 5,10,15,20,25,30,60,120, and 240 min) on adsorption were investigated. For the adsorption isotherm studies, the initial metal concentration was varied over a range of 10-250 mg L −1 .…”

“…Compared with traditional methods, previous researches in laboratory studies have confirmed that biosorption is a prospect and cost-effective technology for removing heavy metals from aqueous solutions, and the possibility of metal recovery from biosorbent has also been reported [16][17][18][19][20][21]. Numerous biomaterials can be used as a sorbent including algae, yeast, fungi and bacteria [6,[22][23][24][25]. Among various biomaterials reported, marine algal biomass has been proved to be a promising biosorbent with higher surface area, higher binding affinity for heavy metals and the abundance of biomass [26].…”