Polyvinyl Alcohol (PVA)-based Hyper-crosslinked Polymers (HCPs) and Their Ultrahigh Iodine Adsorption Capacity

2020 ◽  
Vol 49 (10) ◽  
pp. 1163-1166
Author(s):  
Pu Huang ◽  
Guozong Yue ◽  
Jiazhou Chen ◽  
Jinfan Chen ◽  
Xiaojiao Yang ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Adsorption Capacity ◽  
Crosslinked Polymers ◽  
Iodine Adsorption

scholarly journals Porous MOF-808@PVDF beads for removal of iodine from gas streams

RSC Advances ◽  
2020 ◽  
Vol 10 (73) ◽  
pp. 44679-44687
Author(s):  
Lingyu Wang ◽  
Peng Chen ◽  
Xiuting Dong ◽  
Wen Zhang ◽  
Song Zhao ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Gas Streams ◽  
Composite Beads ◽  
Iodine Adsorption

Porous millimeter-sized MOF-808@PVDF composite beads with ultrahigh iodine adsorption capacity for capture of radioiodine from gas streams.

scholarly journals Metal Organic Framework-Polyethersulfone Composite Membrane for Iodine Capture

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2309
Author(s):  
Po-Hsiang Tang ◽  
Pamela Berilyn So ◽  
Kueir-Rarn Lee ◽  
Yu-Lun Lai ◽  
Cheng-Shiuan Lee ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Promising Result ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Mixed Matrix Membranes ◽  
Iodine Vapor ◽  
Mixing Ratio ◽  
Mixed Matrix ◽  
Metal Organic ◽  
Iodine Adsorption

A variety of metal organic frameworks (MOFs) were synthesized and evaluated for their iodine adsorption capacity. Out of the MOFs tested, ZIF-8 showed the most promising result with an iodine vapor uptake of 876.6 mg/g. ZIF-8 was then incorporated into a polymer, polyethersulfone (PES), at different proportions to prepare mixed matrix membranes (MMMs), which were then used to perform further iodine adsorption experiments. With a mixing ratio of 40 wt % of ZIF-8, the iodine adsorption capacity reached 1387.6 mg/g, wherein an astounding 60% improvement in adsorption was seen with the MMMs prepared compared to the original ZIF-8 powder.

Theoretical insights into volatile iodine adsorption onto COF-DL229

2021 ◽  
Author(s):  
Dayin Tong ◽  
Yaolin Zhao ◽  
Zhongcun Chen ◽  
Yuqi Wang ◽  
Ziqi Jia ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Interaction Mechanism ◽  
Iodine Adsorption

COF-DL229 is one of the promising sorbents towards the capture of volatile radioiodine due to its large adsorption capacity. However, the interaction mechanism between them remains unclear. In the present...

Uniform poly(phosphazene–triazine) porous microspheres for highly efficient iodine removal

2018 ◽  
Vol 54 (61) ◽  
pp. 8450-8453 ◽  
Author(s):  
Shaohui Xiong ◽  
Jian Tao ◽  
Yuanyuan Wang ◽  
Juntao Tang ◽  
Cheng Liu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Porous Microspheres ◽  
Highly Efficient ◽  
Iodine Adsorption

The iodine adsorption capacity of porous organic polymers is greatly enhanced due to the extended π-conjugated units on the backbone.

Pemanfaatan Limbah Padat Palm Kernel Cake (PKC) sebagai Sumber Karbon Aktif dengan Proses Kimia

2016 ◽  
Vol 10 (1) ◽  
pp. 24-35
Author(s):  
Haspiadi Haspiadi
Keyword(s):  
Activated Carbon ◽  
Solid Waste ◽  
Adsorption Capacity ◽  
Chemical Activation ◽  
Palm Kernel ◽  
Palm Kernel Cake ◽  
Palm Kernel Oil ◽  
Kernel Oil ◽  
Iodine Adsorption

Solid waste of Palm kernel cake (PKC) is a by product of oil extraction from palm nut pose a serious environmental problem in some factories of Palm Kernel Oil (PKO. Thererfore the research about utilization of palm kernel cake solid waste (PKC) as a source of activated carbon was performed. From this research is to know quality of activated carbon using palm kernel cake as a row material to compare with the SNI 06-3730-1995. The process was carried out is chemical activation method with in laboratory scale using two types activator, which is phosphoric acid and potassium hydroxide at six different concentration 2%, 4%, 6%, 8%, 10% and 12% respectively. Whereas, carbonization was held at temperature of 400oC during 120 minutes. The result indicated that the quality of activated carbon according to key parameters using  the lowest concentration of  activator fulfilling with SNI 06-3730-1995 was produced by H3PO4 6%  with iodine adsorption capacity 769 mg/g. Meanwhile for activator KOH 10% according to key parameters using  the lowest concentration of  activator fulfilling with SNI 06-3730-1995 was produced by with condition of iodine adsorption capacity 778 mg/gABSTAKLimbah padat palm kernel cake (PKC) yang dihasilkan dari proses ekstraksi kernel merupakan permasalahan lingkungan yang serius dibeberapa industri yang mengolah Palm Kernel Oil (PKO). Oleh karena itu dilakukan penelitian untuk memanfaatkan limbah padat Palm Kernel Cake (PKC) sebagai sumber karbon aktif. Diharapkan dari penelitian ini dapat diketahui mutu karbon aktif yang dihasilkan dibandingkan dengan SNI 06 3730-1995. Proses pengolahan yang dilakukan secara kimia dalam skala laboratorium, menggunakan dua jenis aktivator yaitu H3PO4 dan KOH dengan konsentrasi 2%, 4%, 6%, 8%, 10% dan 12%. Karbonisasi dilakukan pada suhu 400 oC selama 120 menit. Hasil uji mutu karbon aktif yang dihasilkan berdasarkan parameter kunci dengan pertimbangan penggunaan bahan kimia dengan konsentrasi aktivator terkecil menunjukkan bahwa pengggunaan aktivator 6% H3PO4  memiliki daya serap terhadap iod sebesar (I2) 769 mg/g, bila dibandingkan dengan SNI 06 3730-1995 telah dapat memenuhi syarat mutu. Sedangkan penggunaan aktivator KOH 10%  dengan pertimbangan penggunaan bahan kimia dengan konsentrasi aktivator terkecil memiliki daya serap terhadap iod sebesar 778 mg/g. Kata kunci :  asam fosfat, kalium hidroksida, karbon aktif, limbah padat, daya serap iod, palm kernel cake

scholarly journals Synthesis of cation exchange membranes for capacitive deionization based on crosslinked polyvinyl alcohol with citric acid

2020 ◽  
Vol 81 (3) ◽  
pp. 491-498
Author(s):  
Ling Chen ◽  
Shudi Mao ◽  
Zhe Li ◽  
Ying Yang ◽  
Ran Zhao
Keyword(s):  
Citric Acid ◽  
Polyvinyl Alcohol ◽  
Cation Exchange ◽  
Adsorption Capacity ◽  
Transference Number ◽  
Capacitive Deionization ◽  
Mass Ratio ◽  
Total Percentage ◽  
Sulfosuccinic Acid ◽  
The Cost

Abstract Constructing new cation exchange membranes (CEM) has been regarded as an easy and effective approach to improving the capacitive deionization (CDI) system. In this study, a new method of fabrication of CEM was introduced by crosslinking sulfosuccinic acid (SSA) and citric acid (CA). The SSA and CA were crosslinked with polyvinyl alcohol (PVA) to fabricate CEMs in a series of conditions. The ion transference number for each fabricated membrane was tested to select the optimal recipe. The membrane fabricated by the selected method was then tested in the CDI system and the results show that the total percentage of SSA could be reduced from 5% to 1% by adding 5 g of non-toxic and inexpensive CA. The cost of preparing the membrane also decreased from US$0.18 per square meter to US$0.03. The adsorption capacity and the charge efficiency of membrane capacitive deionization system (MCDI) coated with a PVA/SSA/CA layer (mass ratio 10:1:5) was compared with the normal CDI and the MCDI coated with the original membrane (PVA:SSA = 19:5), which is named O-MCDI). The results show that with the modified membrane, the adsorption capacity and the charge efficiency can be enhanced by 18% and 28% compared with the CDI. In addition, although the cost is reduced, the desalination efficiency is still guaranteed. The adsorption capacity and charge efficiency are still increased by about 3% compared with the O-MCDI.

scholarly journals Application of a Bentonite Slurry Modified by Polyvinyl Alcohol in the Cutoff of a Landfill

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Guozhong Dai ◽  
Yanmin Sheng ◽  
Yutao Pan ◽  
Guicai Shi ◽  
Shujin Li
Keyword(s):  
Polyvinyl Alcohol ◽  
Adsorption Capacity ◽  
Permeability Coefficient ◽  
Cutoff Wall ◽  
Treatment Results ◽  
Bentonite Slurry ◽  
Cutoff Walls ◽  
Adsorption Capability

Soil-bentonite cutoff walls are usually used to contain the contaminants of landfills. The pumpability, permeability, and adsorption capability of the slurry are all crucial to the performance of the cutoff wall. In this study, the effect of polyvinyl alcohol (PVA) was used to improve the performance of bentonite slurry. A series of lab tests were conducted to evaluate the pumpability, permeability, and adsorption capacity with different concentrations of PVA treatment. Results show that the addition of PVA can increase the fluidity and pumpable period of slurry, which facilitates the casting and grouting during construction. The addition of PVA also helps to reduce the permeability coefficient of slurry and improve the adsorption capability which enhances the cutoff performance of the walls.

Effect of degree of deacetylation of chitosan on adsorption capacity and reusability of chitosan/polyvinyl alcohol/TiO2 nano composite

2017 ◽  
Vol 104 ◽  
pp. 1133-1142 ◽  
Author(s):  
Umma Habiba ◽  
Tan Chin Joo ◽  
Tawsif A. Siddique ◽  
Areisman Salleh ◽  
Bee Chin Ang ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Adsorption Capacity ◽  
Nano Composite ◽  
Degree Of Deacetylation
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