Removal of methylene blue and Lead (II) via PVA/SA double cross-linked network gel beads loaded Fe3O4@KHA nanoparticles

2021 ◽  
Author(s):  
Niu Yuhua ◽  
Han Xingxing ◽  
Song Jie ◽  
Huang Liangxian
Keyword(s):  
Methylene Blue ◽  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Potassium Humate ◽  
Gel Beads ◽  
Ferroferric Oxide ◽  
Double Cross

Novel magnetic gel beads were successfully fabricated via polyvinyl alcohol (PVA) and sodium alginate (SA) double cross-linked network loaded ferroferric oxide@potassium humate (Fe3O4@KHA) nanoparticles. PVA/SA/Fe3O4@KHA gel beads were found to...

Anaerobic ammonium oxidation in polyvinyl alcohol and sodium alginate immobilized biomass system: a potential tool to maintain anammox biomass in application

2013 ◽  
Vol 69 (4) ◽  
pp. 718-726 ◽  
Author(s):  
Gang-Li Zhu ◽  
Jia Yan ◽  
Yong-You Hu
Keyword(s):  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Nitrogen Removal ◽  
Enrichment Culture ◽  
Batch Reactor ◽  
Anaerobic Ammonium Oxidation ◽  
Anammox Bacteria ◽  
Ammonium Oxidation ◽  
Gel Beads ◽  
Key Factor

Anaerobic ammonium oxidation (anammox) has been proved to be a promising nitrogen removal method for treating ammonium-rich wastewater. However, because of the low-growth rate of anammox bacteria, maintenance of a sufficient amount of anammox biomass in reactor became a key factor in application. Gel immobilization is an efficient method to prevent biomass from being washed out and to promote hyper-concentrated cultures. This study focused on a nitrogen removal process by anammox enrichment culture immobilized in polyvinyl alcohol and sodium alginate (PVA-SA) gel beads. The rapid startup of reactor demonstrated that gel entrapment was supposed to be a highly effective technique for immobilizing anammox bacteria. The anammox bacteria present in the enrichment were identified to be Jettenia-like species (>98%). Moreover, the effect of hydraulic retention time (HRT), pH, and temperature on immobilized anammox processes were investigated. The effect of pH and temperature on the anammox process was evidently weakened in PVA-SA immobilized gel beads, however, the effect of HRT on the anammox reaction was enhanced. Therefore, a stable operated reactor could be obtained in an anaerobic sequencing batch reactor, which proved gel immobilization was an excellent method to maintain the biomass in anammox reactor for application.

Fabrication of 3D Porous Polyvinyl Alcohol/Sodium Alginate/Graphene Oxide Spherical Composites for the Adsorption of Methylene Blue

2020 ◽  
Vol 20 (4) ◽  
pp. 2205-2213 ◽  
Author(s):  
Ying-Xia Ma ◽  
Xin Li ◽  
Wen-Jie Shao ◽  
Ya-Lan Kou ◽  
Hai-Peng Yang ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Sodium Alginate

scholarly journals Denitrification performance of Pseudomonas fluorescens Z03 immobilized by graphene oxide-modified polyvinyl-alcohol and sodium alginate gel beads at low temperature

2020 ◽  
Vol 7 (3) ◽  
pp. 191542 ◽  
Author(s):  
Meizhen Tang ◽  
Jie Jiang ◽  
Qilin Lv ◽  
Bin Yang ◽  
Mingna Zheng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Polyvinyl Alcohol ◽  
Pseudomonas Fluorescens ◽  
Sodium Alginate ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Extracellular Polymeric Substances ◽  
Aerobic Denitrification ◽  
Gel Beads

Improving the effect of microbial denitrification under low-temperature conditions has been a popular focus of research in recent years. In this study, graphene oxide (GO)-modified polyvinyl-alcohol (PVA) and sodium alginate (SA) (GO/PVA–SA) gel beads were used as a heterotrophic nitrification–aerobic denitrification (HN–AD) bacteria ( Pseudomonas fluorescens Z03) carrier to enhance nitrogen removal efficiency levels at low temperatures (6–8°C). The removal efficiency of N H 4     + -N and N O 3       − -N and the variations in concentrations of extracellular polymeric substances (EPS) under different GO doses (0.03–0.15 g l −1 ) were studied. The results indicated that the addition of GO can improve the efficiency of nitrogen removal, and the highest removal efficiency level and highest carbohydrate, protein, and total EPS content levels (50.28 mg, 132.78 mg and 183.06 mg (g GO/PVA–SA gel) −1 , respectively) were obtained with 0.15 g l −1 GO. The simplified Monod model accurately predicted the nitrogen removal efficiency level. These findings suggested that the application of GO serves as an effective means to enhance nitrogen removal by stimulating the activity of HN–AD bacteria.

MXene/sodium alginate gel beads for adsorption of methylene blue

2021 ◽  
Vol 260 ◽  
pp. 124123
Author(s):  
Zhi-Hao Zhang ◽  
Jia-Ying Xu ◽  
Xiao-Li Yang
Keyword(s):  
Methylene Blue ◽  
Sodium Alginate ◽  
Alginate Gel ◽  
Gel Beads
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