Adsorption behavior of Cd(II) ions on humic acid-immobilized sodium alginate and hydroxyl ethyl cellulose blending porous composite membrane adsorbent

Desalination ◽  
2012 ◽  
Vol 285 ◽  
pp. 54-61 ◽  
Author(s):  
Jian Hua Chen ◽  
Jian Cong Ni ◽  
Qing Lin Liu ◽  
Shun Xing Li
Keyword(s):  
Humic Acid ◽  
Sodium Alginate ◽  
Composite Membrane ◽  
Ethyl Cellulose ◽  
Adsorption Behavior ◽  
Porous Composite ◽  
Membrane Adsorbent

Cr(III) ionic imprinted polyvinyl alcohol/sodium alginate (PVA/SA) porous composite membranes for selective adsorption of Cr(III) ions

2010 ◽  
Vol 165 (2) ◽  
pp. 465-473 ◽  
Author(s):  
Jian Hua Chen ◽  
Guo Ping Li ◽  
Qing Lin Liu ◽  
Jian Cong Ni ◽  
Wen Bing Wu ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Selective Adsorption ◽  
Composite Membranes ◽  
Porous Composite

scholarly journals PEMBUATAN DAN KARAKTERISASI MEMBRAN KOMPOSIT KITOSAN-SODIUM ALGINAT TERFOSFORILASI SEBAGAI PROTON EXCHANGE MEMBRANE FUEL CELL (PEMFC)

2016 ◽  
Vol 1 (1) ◽  
pp. 14
Author(s):  
Siti Wafiroh ◽  
Suyanto Suyanto ◽  
Yuliana Yuliana
Keyword(s):  
Fuel Cell ◽  
Sodium Alginate ◽  
Proton Conductivity ◽  
Composite Membrane ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Methanol Permeability ◽  
Water Swelling ◽  
Exchange Membrane

AbstrakDi era globalisasi ini, kebutuhan bahan bakar fosil semakin meningkat dan ketersediannya semakin menipis. Oleh karena itu, dibutuhkan bahan bakar alternatif seperti Proton Exchange Membrane Fuel Cell (PEMFC). Tujuan dari penelitian ini adalah membuat dan mengkarakterisasi membran komposit kitosan-sodium alginat dari rumput laut coklat (Sargassum sp.) terfosforilasi sebagai Proton Exchange Membrane Fuel Cell (PEMFC). PEM dibuat dengan 4 variasi perbandingan konsentrasi antara kitosan dengan sodium alginat 8:0, 8:1, 8:2, dan 8:4 (b/b). Membran komposit kitosan-sodium alginat difosforilasi dengan STPP 2N. Karakterisasi PEM meliputi: uji tarik, swelling air, kapasitas penukar ion, FTIR, SEM, permeabilitas metanol, dan konduktivitas proton. Berdasarkan hasil analisis tersebut, membran yang optimal adalah perbandingan 8:1 (b/b) dengan nilai modulus young sebesar 0,0901 kN/cm2, swelling air sebesar 19,14 %, permeabilitas metanol sebesar 72,7 x 10-7, dan konduktivitas proton sebesar 4,7 x 10-5 S/cm. Membran komposit kitosan-sodium alginat terfosforilasi memiliki kemampuan yang cukup baik untuk bisa diaplikasikan sebagai membran polimer elektrolit dalam PEMFC. Kata kunci: kitosan, sodium alginat, terfosforilasi, PEMFC  AbstractIn this globalization era, the needs of fossil fuel certainly increases, but its providence decreases. Therefore, we need alternative fuels such as Proton Exchange Membrane Fuel Cell (PEMFC). The purpose of this study is preparationand characterization of phosphorylated chitosan-sodium alginate composite membrane from brown seaweed (Sargassum sp.) as Proton Exchange Membrane Fuel Cell (PEMFC). PEM is produced with 4 variations of concentration ratio between chitosan and sodium alginate 8:0, 8:1, 8:2, and 8:4 (w/w). Chitosan-sodium alginate composite membrane phosphorylated with 2 N STPP. The characterization of PEM include: tensile test, water swelling, ion exchange capacity, FTIR, SEM, methanol permeability, and proton conductivity. Based on the analysis result, the optimal membrane is ratio of 8:1 (w/w) with the value of Young’s modulus about 0.0901 kN/cm2, water swelling at 19.14%, methanol permeability about 72.7 x 10-7, and proton conductivity about 4.7 x 10-5 S/cm. The phosphorylated chitosan-sodium alginate composite membrane has good potentials for the application of the polymer electrolyte membrane in PEMFC. Keywords: chitosan, sodium alginate, phosphorylated, PEMFC

Remotely actuated porous composite membrane with shape memory property

2018 ◽  
Vol 192 ◽  
pp. 507-515 ◽  
Author(s):  
Yongtao Yao ◽  
Yun Luo ◽  
Haibao Lu ◽  
Bing Wang
Keyword(s):  
Shape Memory ◽  
Composite Membrane ◽  
Porous Composite ◽  
Shape Memory Property ◽  
Memory Property

scholarly journals Removal Effect of Atrazine in Co-Solution with Bisphenol A or Humic Acid by Different Activated Carbons

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2558 ◽  
Author(s):  
Zhansheng Wu ◽  
Xinhui Wei ◽  
Yongtao Xue ◽  
Xiufang He ◽  
Xia Yang
Keyword(s):  
Humic Acid ◽  
Bisphenol A ◽  
Adsorption Kinetics ◽  
Competitive Adsorption ◽  
Activated Carbons ◽  
Second Order ◽  
Adsorption Behavior ◽  
Single Solution ◽  
Pseudo Second Order ◽  
Kinetics Of

Activated carbons (ACs) based on apricot shells (AS), wood (W), and walnut shells (WS) were applied to adsorb atrazine in co-solutions. To study the effect of Bisphenol A (BPA) on the adsorption behavior of atrazine, the adsorption performance of ACs for BPA in single solution was studied. The results demonstrated that the adsorption kinetics of BPA fitted the pseudo-second-order model, the adsorption isotherms of BPA followed the Langmuir model. Meanwhile, the adsorption kinetics of atrazine fitted the pseudo-second-order kinetics model and the isotherm was consistent with the Freundlich model both in single solution and co-solution. In addition, competitive adsorption was observed when atrazine coexisted with BPA or humic acid. For the adsorption capacity, the adsorption amount of ASAC, WAC, and WSAC for atrazine obviously decreased by 18.0%, 30.0%, and 30.3% in the presence of BPA, respectively, which was due to the π−π interactions, hydrophobic interactions, and H-bonds, resulting in the competitive adsorption between atrazine and BPA. This study contributes to the further understanding of the adsorption behavior for atrazine in co-solution.

Adsorption behavior of Th(IV) onto illite: Effect of contact time, pH value, ionic strength, humic acid and temperature

2016 ◽  
Vol 127-128 ◽  
pp. 35-43 ◽  
Author(s):  
Zhang Hongxia ◽  
Wang Xiaoyun ◽  
Liang Honghong ◽  
Tan Tianshe ◽  
Wu Wangsuo
Keyword(s):  
Humic Acid ◽  
Ionic Strength ◽  
Contact Time ◽  
Ph Value ◽  
Adsorption Behavior

scholarly journals Effect of Organic Substances on Nutrients Recovery by Struvite Electrochemical Precipitation from Synthetic Anaerobically Treated Swine Wastewater

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 594
Author(s):  
Run-Feng Chen ◽  
Tao Liu ◽  
Hong-Wei Rong ◽  
Hai-Tao Zhong ◽  
Chun-Hai Wei
Keyword(s):  
Humic Acid ◽  
Sodium Alginate ◽  
Current Density ◽  
Swine Wastewater ◽  
Organic Substances ◽  
Nutrients Removal ◽  
High Concentration ◽  
Bovine Albumin ◽  
Initial Ph ◽  
Nutrients Recovery

Anaerobically treated swine wastewater contains large amounts of orthophosphate phosphorus, ammonium nitrogen and organic substances with potential nutrients recovery via struvite electrochemical precipitation post-treatment. Lab-scale batch experiments were systematically conducted in this study to investigate the effects of initial pH, current density, organic substances upon nutrients removal, and precipitates quality (characterized by X-ray diffraction, scanning electron microscopy and element analysis via acid dissolution method) during the struvite electrochemical precipitation process. The optimal conditions for the initial pH of 7.0 and current density of 4 mA/cm2 favoured nutrients removal and precipitates quality (struvite purity of up to 94.2%) in the absence of organic substances. By contrast, a more adverse effect on nutrients removal, morphology and purity of precipitates was found by humic acid than by sodium alginate and bovine albumin in the individual presence of organic substances. Low concentration combination of bovine albumin, sodium alginate, and humic acid showed antagonistic inhibition effects, whereas a high concentration combination showed the accelerating inhibition effects. Initial pH adjustment from 7 to 8 could effectively mitigate the adverse effects on struvite electrochemical precipitation under high concentration combined with organic substances (500 mg/L bovine albumin, 500 mg/L sodium alginate, and 1500 mg/L humic acid); this may help improve struvite electrochemical precipitation technology in practical application for nutrients recovery from anaerobically treated swine wastewater.

Preparation of Polyvinyl Alcohol-Sodium Alginate Composite Membrane with Sustained Drug Release Behavior

2018 ◽  
Vol 12 (6) ◽  
pp. 822-826
Author(s):  
Lei Jiang ◽  
Chen Su ◽  
Zhongjie Zhu ◽  
Yanyi Wen ◽  
Shan Ye ◽  
...  
Keyword(s):  
Drug Release ◽  
Polyvinyl Alcohol ◽  
Sodium Alginate ◽  
Composite Membrane ◽  
Release Behavior ◽  
Sustained Drug Release ◽  
Drug Release Behavior
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