Entrapment of Mg-Al layered double hydroxide in calcium alginate beads for phosphate removal from aqueous solution

2011 ◽  
Vol 36 (1-3) ◽  
pp. 178-186 ◽  
Author(s):  
Yong-Un Han ◽  
Won-Suk Lee ◽  
Chang-Gu Lee ◽  
Seong-Jik Park ◽  
Ki-Woo Kim ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Calcium Alginate ◽  
Alginate Beads ◽  
Phosphate Removal ◽  
Calcium Alginate Beads ◽  
Double Hydroxide

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.

Layered double hydroxide (LDH)-coated attapulgite for phosphate removal from aqueous solution

2011 ◽  
Vol 64 (11) ◽  
pp. 2192-2198 ◽  
Author(s):  
Gan Fang-qun ◽  
Zhou Jian-min ◽  
Wang Huo-yan ◽  
Zhao Hong-ting
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxide ◽  
Tap Water ◽  
Packed Bed ◽  
Phosphate Removal ◽  
Maximum Adsorption Capacity ◽  
Batch Mode ◽  
Packed Bed Column ◽  
Competing Anions ◽  
Double Hydroxide

In this study, a composite adsorbent, layered double hydroxide (LDH)-coated attapulgite (LDH-AP), was synthesized and characterized. Its potential application for LDH stabilizer and phosphate (P) removal from aqueous solution was evaluated using the batch mode and continuous mode in a packed bed column. The batch experiments revealed that the data of P adsorption onto LDH-AP could be well described by the Freundlich equation, and the maximum adsorption capacity was estimated to be 6.9 mg/g. The column experiments were conducted in the tap water and the results indicated that the competing anions could slightly decrease phosphate removal. The saturated column was regenerated by 0.2 mol/L of NaOH and the regenerated column was examined for its reuse in phosphate removal. The results of this study suggested that attapulgite could be used as an applicable stabilizer of LDH and LDH-AP could be potentially used as a promising filtration medium for phosphate removal.

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