Covalent organic polymer grafted on granular activated carbon surface to immobilize Prussian blue for Cs&lt;sup&gt;+&lt;/sup&gt; removal

This study aims to utilize Prussian Blue (PB) to develop a high performance adsorbent for removing radioactive cesium from radioactive accidents. Prussian blue (PB) can adsorb selectively to cesium (Cs), which is high in adsorption efficiency, but has a disadvantage that it is difficult to recover after adsorption, so there is a high concern about secondary environmental pollution. Therefore, this study modified the surface of powder activated carbon (PAC) particles by using covalent organic polymer (COP) for stable immobilization of PB, and developed a PB-impregnated adsorbent (COP-PAC-PB). Synthesis of COP-PAC-PB was performed by sequentially reacting with iron (III) chloride and potassium ferrocyanide solution to synthesize PB in COP pore (In-situ). The maximum adsorption of COP-PAC-PB on cesium was 19 mg / g and the removal efficiency for radioactivity cesium (Cs-137, 60 Bq / kg) was 97.3%. In addition, PB was synthesized by the same method as that of COP-PAC-PB, which is a modification product of the unmodified group (PAC, Ox-PAC), and UV-vis analysis was performed to compare PB desorption characteristics after washing Respectively. In the unmodified group (PAC-PB, Ox-PAC-PB), a large amount of PB was desorbed when washed once to 6 times. In the case of COP-PAC-PB, it was not. As a result, the surface of the PAC particles was effectively modified using COP, and the adsorbent with Prussian blue stably immobilized was developed.

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Role of Granular Activated Carbon Surface Chemistry on the Adsorption of Organic Compounds. 1. Priority Pollutants

Environmental Science & Technology ◽

10.1021/es002008e ◽

2000 ◽

Vol 34 (11) ◽

pp. 2372-2372 ◽

Cited By ~ 4

Author(s):

Tanju Karanfil ◽

James E. Kilduff

Keyword(s):

Activated Carbon ◽

Surface Chemistry ◽

Organic Compounds ◽

Granular Activated Carbon ◽

Carbon Surface ◽

Priority Pollutants

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Column Studies for the Adsorption of Cationic Surfactant onto an Organic Polymer Resin and a Granular Activated Carbon

Water Environment Research ◽

10.2175/106143009x12487095236351 ◽

2010 ◽

Vol 82 (3) ◽

pp. 209-215 ◽

Cited By ~ 4

Author(s):

Ilda Vergili ◽

Yasemin Kaya ◽

Zeren Beril Gönder ◽

Hulusi Barlas

Keyword(s):

Activated Carbon ◽

Cationic Surfactant ◽

Granular Activated Carbon ◽

Organic Polymer ◽

Column Studies ◽

Polymer Resin

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Thermodynamic study of the interactions of salicylic acid and granular activated carbon in solution at different pHs

Adsorption Science & Technology ◽

10.1177/0263617417730463 ◽

2017 ◽

Vol 36 (3-4) ◽

pp. 833-850 ◽

Cited By ~ 8

Author(s):

Valentina Bernal ◽

Liliana Giraldo ◽

Juan C Moreno-Piraján

Keyword(s):

Salicylic Acid ◽

Activated Carbon ◽

Aqueous Solutions ◽

Activated Carbons ◽

Granular Activated Carbon ◽

Molecular Size ◽

Carbon Surface ◽

Immersion Enthalpy ◽

Inappropriate Use

The inappropriate use of pain medication has led to the appearance of salicylic acid molecules (aspirin’s metabolite excretion) in surface water, which causes problems for the environment. The adsorption process using activated carbon is one of the processes that is used for the removal of organic compounds present in the aqueous phase; however, the percentage of removal depends on the physicochemical properties of the adsorbent and the adsorbate such as: pore size, surface area, surface chemistry, molecular size and solubility. In this work, we have studied the adsorbent–adsorbate interactions through the determination of the immersion enthalpy of the activated carbon in salicylic acid aqueous solutions; due to the solute and activated carbon surface have functional groups capable of ionized with the pH, the adsorption study was carried out at pH 2, 7, and 11. The activated carbons selected for the study were a granular activated carbon and a reduced activated carbon to 1173 K; as the immersion liquid were used salicylic acid aqueous solutions with concentrations between 0.072 mmol/ l and 0.72 mmol/ l, the solutions at pH 2 and 11 were prepared with HCl and NaOH solutions, respectively. It was determined that the immersion enthalpy is between −7.39 J /g and −22.5 J/g for the reduced activated carbon and between −7.63 J/g and −16.73 J/g for the granular activated carbon.

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