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...

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.

scholarly journals Efficient and Selective Adsorption of Gold Ions from Wastewater with Polyaniline Modified by Trimethyl Phosphate: Adsorption Mechanism and Application

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 652 ◽  
Author(s):  
Wang ◽  
Zhao ◽  
Wang ◽  
Zhang ◽  
Zhang
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Process ◽  
Selective Adsorption ◽  
Interaction Mechanism ◽  
Single Layer ◽  
Phosphate Adsorption ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Trimethyl Phosphate ◽  
Selective Recovery

The selective recovery of gold from wastewater is necessary because it is widely used in various fields. In this study, a new polymeric adsorbent (TP-AFC) was prepared by modifying polyaniline with trimethyl phosphate for the selective recovery of gold from wastewater. Bath experiments were carried out to explore the adsorption capacity and mechanism. The optimum pH of adsorption is 4. The adsorption equilibrium is reached at 840 min. The maximum adsorption capacity is 881 mg/g and the adsorption was a spontaneous endothermic process. The adsorption process fitted well with pseudo second-order kinetic and the Langmuir-models. The single-layer chemisorption governed the adsorption process. In addition, the application in wastewater indicated that the interfering ions had no effect on the adsorption of gold ions. TP-AFC has good selectivity. The interaction mechanism was mainly ion exchange and complexation. In general, TP-AFC was successfully prepared and has an excellent future in practical application.

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 The Physicochemical Characteristic of Activated Carbon Based on Sludge and Preparation Method

2021 ◽  
Vol 20 (3) ◽  
Author(s):  
H. Lu ◽  
F. Luo ◽  
Q. Zhang ◽  
J. Li ◽  
L. Cai
Keyword(s):  
Activated Carbon ◽  
Pore Structure ◽  
Adsorption Capacity ◽  
Reaction Temperature ◽  
Preparation Method ◽  
Physicochemical Characteristic ◽  
Preparation Condition ◽  
Yield Rate ◽  
Iodine Adsorption ◽  
Component Adsorption

To understand the features and best preparation of sludge activated carbon (SAC), and the pore structure, component, adsorption characteristics, and the yield rate of SAC, many tests have been carried out. The study illustrated that the pore structure was mostly mesopore and amorphous pore such as the ink bottle hole. In terms of different preparations to obtain SAC, the yield of SAC in sample No.1 achieved 88.09%. Using the preparation of ZnCl2 as an activator, the iodine adsorption value was significantly higher than other preparations. However, the content of quartz in sample No.1 achieved a maximum of 52.51%. Charcoal was detected in all samples except sample nos 9-12. The adsorption capacity of Cu(II) and Cd(II) reached a maximum of 600.02 mg.kg-1 and 383.2 mg.kg-1. The results showed an optimum preparation condition, which was by using the ZnCl2 as an activator, 2:1 as the impregnated ratio, 40% concentration in activator and at 400ºC reaction temperature could create rich pore structure and charcoal inside.

A rare (3,12)-connected zirconium metal–organic framework with efficient iodine adsorption capacity and pH sensing

2019 ◽  
Vol 7 (21) ◽  
pp. 13173-13179 ◽  
Author(s):  
Bingbing Guo ◽  
Fugang Li ◽  
Chiming Wang ◽  
Liangliang Zhang ◽  
Daofeng Sun
Keyword(s):  
Adsorption Capacity ◽  
Metal Organic Framework ◽  
Ph Sensing ◽  
Metal Organic ◽  
Iodine Adsorption ◽  
Zirconium Metal ◽  
Organic Framework

We synthesized a rare (3,12)-connected zirconium metal–organic framework with a sky topology showing efficient iodine adsorption and pH sensing capacity.

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

Adsorption of Cr Ion by Activated Carbon Prepared from Corncob Xylitol Residue

2013 ◽  
Vol 712-715 ◽  
pp. 527-530
Author(s):  
Jing Wen Xue
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Adsorption Property ◽  
Adsorption Condition ◽  
Iodine Adsorption

Corncob xylitol residue was soaked with H3PO4 for 16h and carbonized in microwave for 9min to obtain activated carbon. Methylene blue and iodine adsorption values were determined and were 119.92mg/g and 839.47mg/g, respectively. The adsorption property on Cr6+ was determined and the proper adsorption condition was pH2, 30min, 80°C. The maximum Cr adsorption capacity was 50mg/g.

scholarly journals Iodine Adsorption in Tetrathiafulvalene-Based Covalent Organic Frameworks

2020 ◽  
Author(s):  
Jianhong Chang ◽  
Hui Li ◽  
Xinyu Guan ◽  
Cuimei Li ◽  
Guangtao Yu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Photoelectron Spectroscopy ◽  
Chemical Interaction ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Covalent Organic Frameworks ◽  
Paramagnetic Resonance ◽  
Surface Areas ◽  
Iodine Adsorption

<p>To safeguard the development of nuclear energy, practical techniques for capture and storage of radioiodine are of critical importance but remains a significant challenge. Here we report the synergistic effect of physical and chemical adsorption of iodine in tetrathiafulvalene-based covalent organic frameworks (COFs), which can markedly improve both iodine adsorption capacity and adsorption kinetics due to their strong interaction. These functionalized architectures are designed to have high specific surface areas (up to 2359 m<sup>2</sup> g<sup>−</sup><sup>1</sup>) for efficient physisorption of iodine, and abundant tetrathiafulvalene functional groups for strong chemisorption of iodine. We demonstrate that these frameworks achieve excellent iodine adsorption capacity (~ 8.15 g g<sup>-1</sup>) and adsorption kinetics (~ 0.69 g g<sup>-1</sup> h<sup>-1</sup>), which are much higher than other materials reported so far, including silver-doped adsorbents, inorganic porous materials,<sup> </sup>metal−organic frameworks, porous organic frameworks, and other COFs. Furthermore, a combined theoretical and experimental study<b>, </b>including DFT calculations, electron paramagnetic resonance spectroscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy, reveals the strong chemical interaction between iodine and framework of material. Our study thus opens an avenue to construct functional COFs for a critical environment-related application. <b></b></p>

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