Preliminary studies on Cr(VI) removal from aqueous solution using grape stalk wastes encapsulated in calcium alginate beads in a packed bed up-flow column

2006 ◽  
Vol 66 (8) ◽  
pp. 795-807 ◽  
Author(s):  
N. Fiol ◽  
C. Escudero ◽  
J. Poch ◽  
I. Villaescusa
Keyword(s):  
Aqueous Solution ◽  
Calcium Alginate ◽  
Packed Bed ◽  
Alginate Beads ◽  
Calcium Alginate Beads

Efficient removal of methylene blue in aqueous solution by freeze-dried calcium alginate beads

2016 ◽  
Vol 33 (11) ◽  
pp. 3141-3148 ◽  
Author(s):  
Guangxue Liu ◽  
Zonggao Hu ◽  
Rouwen Guan ◽  
Yafei Zhao ◽  
Hongsong Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Calcium Alginate ◽  
Alginate Beads ◽  
Efficient Removal ◽  
Calcium Alginate Beads ◽  
Freeze Dried

scholarly journals Analysis of removal of cadmium by action of immobilized Chlorella sp. micro-algae in alginate beads

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 54 ◽  
Author(s):  
Christian Valdez ◽  
Yomaira Perengüez ◽  
Bence Mátyás ◽  
María Fernanda Guevara
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Atomic Absorption ◽  
Calcium Alginate ◽  
Alginate Beads ◽  
Cadmium Removal ◽  
Initial Concentration ◽  
Calcium Alginate Beads ◽  
Chlorella Sp ◽  
Metabolic Systems

Cadmium (Cd) is a metal that can negatively interfere with the metabolic systems of living beings. The objective of this work was to evaluate the capacity for cadmium removal in aqueous solutions by immobilized Chlorella sp. in calcium alginate beads. Beads without Chlorella sp. were used as a control. All the treatments were established in triplicate for 80 min, at four concentrations of cadmium (0, 20, 100 and 200 ppm), taking samples of aqueous solution every 10 min, to be read using atomic absorption equipment. The study determined that the treatment of alginate beads with immobilized Chlorella sp. removed 59.67% of cadmium at an initial concentration of 20 ppm, this being the best removal result.

Kinetics studies of p-cresol biodegradation by using Pseudomonas putida in batch reactor and in continuous bioreactor packed with calcium alginate beads

2010 ◽  
Vol 62 (12) ◽  
pp. 2920-2929 ◽  
Author(s):  
A. K. Mathur ◽  
Shashi Bala ◽  
C. B. Majumder ◽  
S. Sarkar
Keyword(s):  
Pseudomonas Putida ◽  
Calcium Alginate ◽  
Degradation Rate ◽  
Batch Reactor ◽  
Packed Bed ◽  
Alginate Beads ◽  
Calcium Alginate Beads ◽  
Continuous Bioreactor ◽  
Haldane Model ◽  
Modified Equation

Present study deals with the biodegradation of p-cresol by using Pseudomonas putida in a batch reactor and a continuous bioreactor packed with calcium alginate beads. The maximum specific growth rate of 0.8121 h−1 was obtained at 200 mg L−1 concentration of p-cresol in batch reactor. The maximum p-cresol degradation rate was obtained 6.598 mg L−1 h−1 at So=200 mg L−1 and 62.8 mg L−1 h−1 at So=500 mg L−1 for batch reactor and a continuous bioreactor, respectively. The p-cresol degradation rate of continuous bioreactor was 9 to 10-fold higher than those of the batch reactor. It shows that the continuous bioreactor could tolerate a higher concentration of p-cresol. A Haldane model was also used for p-cresol inhibition in batch reactor and a modified equation similar to Haldane model for continuous bioreactor. The Haldane parameters were obtained as μmax 0.3398 h−1, Ks 110.9574 mg L−1, and KI 497.6169 mg L−1 in batch reactor. The parameters used in continuous bioreactor were obtained as Dmax 91.801 mg L−1 h−1, Ks 131.292 mg L−1, and KI 1217.7 mg L−1. The value KI of continuous bioreactor is approximately 2.5 times higher than the batch reactor. Higher KI value of continuous bioreactor indicates P. putida can grow at high range of p-cresol concentration. The ability of tolerance of higher p-cresol concentrations may be one reason for biofilm attachment on the packed bed in the continuous operation.

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