Removal of cobalt, strontium and cesium from radioactive laundry wastewater by ammonium molybdophosphate–polyacrylonitrile (AMP–PAN)

Strontium Removal in Seawater by Means of Composite Magnetic Nanoparticles Derived from Industrial Sludge

“…In addition, rapidly increased Sr removal was observed when the solution pH increased from 2.61 to 10.25 at 298 K. This phenomenon is similar to the results using waste iron oxide BT 1 [29] and BT 9 [30]. Sr 2+ was the dominant species in solution at pH less than 11; at pH values greater than 11, Sr(OH) + was dominant [13]. On the other hand, the speciation in solution and the surface charge of the composite magnetic nanoparticles play important roles in Sr adsorption.…”

“…The maximum adsorption of Sr at 318 K on the composite magnetic nanoparticles was 23.04 mg Sr/g CuFe2O4 (calculated based on the Langmuir isotherm). This adsorption capacity is higher than several of the listed adsorbents, including ammonium molybdophosphate polyacrylonitrile (16.6 mg•g −1 ) [13], montmorillonite (13.3 mg•g −1 ) [8], phosphatemodified montmorillonite (12.6 mg•g −1 ) [8], magnetic Fe3O4 particle-modified sawdust (12.6 mg•g −1 ) [41], and hydrous ferric oxide (6.9 mg•g −1 ) [21]. The negative change in the adsorption standard free energy (∆G • = −5.68, −6.45, and −7.23 kJ·mol −1 at 298, 308, and 318 K, respectively) shows that the adsorption reaction is a spontaneous process [37].…”

Removal of heavy metals and pollutants by membrane adsorption techniques

“…The results clarified that the Cs removal process was rapid and reached saturation within a short time. Park et al (2010) used spherical beads of ammonium molybdophosphate-polyacrylonitrile (AMP-PAN) as the adsorptive material for the removal of Co, Sr and Cs in the radioactive laundry wastewater generated from nuclear power plants. The maximum adsorption capacities were 0.16, 0.18 and 0.61 mmol/g for Co 2+ , Sr 2+ and C s+ , respectively.…”

Sorptive Removal of Radionuclides (Cobalt, Strontium and Cesium) using AMP/IO-PAN Composites

“…이러한 기술 중에서 현재 이온교환이 가장 유효 한 기술로 여겨지고 있으며, 천연 제올라이트(zeoilte) [2], 실 리코타이타네이트(silicotitanate) [3], 헥사시아노페라이트 복 합체(hexacyanoferrate complex) [4], 암모늄몰리브도포스페 이트(ammonium molybdophosphate) [5][6][7][8][9] Freundlich 모델은 다음과 같이 표현 된다 [8].…”