Search Results - "Ahn, Ji Whan"

Synthesis of nanoporous materials via recycling coal fly ash and other solid wastes: A mini review by Lee, Yu-Ri, Soe, June Thet, Zhang, Siqian, Ahn, Ji-Whan, Park, Min Bum, Ahn, Wha-Seung

“…[Display omitted] •Physicochemical pre-treatment of fly ash for nanoporous materials synthesis.•Synthesis of zeolites, mesoporous silica, and silica…”
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Carbon dioxide capture using amine-impregnated HMS having textural mesoporosity by Chen, Chao, Son, Won-Jin, You, Kwang-Seok, Ahn, Ji-Whan, Ahn, Wha-Seung

“…A series of HMS (hexagonal mesoporous silica) materials having different textural mesoporosities was synthesized using dodecylamine as a structure directing…”
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Effect of polyacrylic acid on direct aqueous mineral carbonation of flue gas desulfurization gypsum by Song, Kyungsun, Kim, Wonbaek, Park, Sangwon, Bang, Jun-Hwan, Jeon, Chi Wan, Ahn, Ji-Whan

“…[Display omitted] •Effect of PAA on carbonation of FGD gypsum was studied.•PAA extended induction period to over 1.5h.•PAA increased Ca2+ in filtered solution…”
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Effects of two different accelerated carbonation processes on MSWI bottom ash by Um, Namil, Ahn, Ji-Whan

“…[Display omitted] •We investigated two different reaction modes with wet and submerged for carbonation.•The two modes were controlled with L/S ratios of 0.3…”
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Synthesis of aragonite-precipitated calcium carbonate from oyster shell waste via a carbonation process and its applications by Ramakrishna, Chilakala, Thenepalli, Thriveni, Han, Choon, Ahn, Ji-Whan

“…Oyster shells are abundantly available in nature without eminent use and are dumped into landfills in vast quantities. Their improper disposal causes…”
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Effects of magnesium chloride and organic additives on the synthesis of aragonite precipitated calcium carbonate by Park, Woon Kyoung, Ko, Sang-Jin, Lee, Seung Woo, Cho, Kye-Hong, Ahn, Ji-Whan, Han, Choon

“…The synthesis of aragonite precipitated calcium carbonate by treating a suspension of Ca(OH) 2 with CO 2 gas was investigated with regard to the effects of Mg…”
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Coupled LMDI and system dynamics model for estimating urban CO2 emission mitigation potential in Shanghai, China by Gu, Shuai, Fu, Bitian, Thriveni, Thenepalli, Fujita, Toyohisa, Ahn, Ji Whan

“…In this study, both the extended logarithmic mean divisia index (LMDI) model and the system dynamics (SD) model were used to explore determinants of CO2…”
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Effect of Accelerated Carbonation on the Leaching Behavior of Cr in Municipal Solid Waste Incinerator Bottom Ash and the Carbonation Kinetics by Um, Namil, Nam, Seong-Young, Ahn, Ji-Whan

“…The accelerated carbonation process with CO2 absorption to confirm the leaching behavior of Cr in municipal-solid-waste incinerator (MSWI) bottom ash was…”
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Mesoporous alumina (I): Comparison of synthesis schemes using anionic, cationic, and non-ionic surfactants by Ray, Jagadish C., You, Kwang-Seok, Ahn, Ji-Whan, Ahn, Wha-Seung

“…A series of mesoporous alumina was prepared using a selected group of anionic, non-ionic, and cationic surfactants with Al-tri- sec-butoxide or Al 3+ in…”
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Mechanism for phosphorus removal from wastewater with fly ash of municipal solid waste incineration, Seoul, Korea by Gu, Shuai, Fu, Bitian, Ahn, Ji-Whan, Fang, Baizeng

“…A novel mechanism that combines adsorption with chemical precipitation is proposed to interpret the removal of phosphorus with fly ash of municipal solid waste…”
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Synthesis of nano precipitated calcium carbonate by using a carbonation process through a closed loop reactor by Thriveni, Thenepalli, Ahn, Ji Whan, Ramakrishna, Chilakala, Ahn, Young Jun, Han, Choon

“…Nano calcium carbonate particles have a wide range of industrial applications due to their beneficial properties such as high porosity and high surface area to…”
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Performance improvement of local Korean natural hydraulic lime-based mortar using inorganic by-products by Cho, Jin-Sang, Moon, Ki-Yeon, Choi, Moon-Kwan, Cho, Kye-Hong, Ahn, Ji-Whan, Yeon, Kyu-Seok

“…Our goal was to verify the manufacturing availability of local Korean natural hydraulic lime (K-NHL) using local Korean low-grade limestone and to test the…”
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Preparation of Mullite-Silica Composites Using Silica-Rich Monophasic Precursor Obtained as a Byproduct of Mineral Carbonation of Blast-Furnace Slag by Kyungsun Song, Wonbaek Kim, Chang-Yul Suh, Jun-Hwan Bang, Ji-Whan Ahn

“…Previously, mineral carbonation of blast-furnace slag was carried out to sequestrate CO2 and attain pure CaCO3 crystals. In this process, amorphous…”
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Leachability of arsenic and heavy metals from mine tailings of abandoned metal mines by Lim, Mihee, Han, Gi-Chun, Ahn, Ji-Whan, You, Kwang-Suk, Kim, Hyung-Seok

“…Mine tailings from an abandoned metal mine in Korea contained high concentrations of arsenic (As) and heavy metals [e.g., As: 67,336, Fe: 137,180, Cu: 764, Pb:…”
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Effects of Experimental Parameters on the Extraction of Silica and Carbonation of Blast Furnace Slag at Atmospheric Pressure in Low-Concentration Acetic Acid by Song, Kyungsun, Park, Sangwon, Kim, Wonbaek, Jeon, Chi, Ahn, Ji-Whan

“…Blast furnace slag (BFS), a calcium-rich industrial byproduct, has been utilized since 2005 as a mineral carbonation feedstock for CO2 sequestration, producing…”
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Effects of modified LDPE on physico-mechanical properties of HDPE/CaCO3 composites by Ahn, Youngjun, Jeon, Jong Hyuk, Park, Ju-Hyoung, Thenepalli, Thriveni, Ahn, Ji Whan, Han, Choon

“…HDPE/CaCO 3 /LDPE-g-MA composites of high density polyethylene (HDPE) and calcium carbonate (CaCO 3 ) with maleic anhydride grafted low density polyethylene…”
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Preparation of Silica-Alumina Nanoparticles via Blast-Furnace Slag Dissolution in Low-Concentration Acetic Acid for Carbonation by Kyungsun Song, Wonbaek Kim, Sangwon Park, Jun-Hwan Bang, Jeongyun Kim, Ji-Whan Ahn

“…Blast-furnace slag (BFS) has been used as a feedstock for CO2 sequestration by indirect mineral carbonation to produce calcium carbonate precipitates and solid…”
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Arsenic Oxyanions Removal from Waste Water by Accelerated Carbonation by THRIVENI, Thenepalli, AHN, Ji Whan, RAMAKRISNA, Chilakala

“…Currently, arsenic contamination in drinking water is an emerging issue around the world. Arsenic contamination is severe threat to the environment and human…”
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Effect of Eggshell Powder on the Hydration of Cement Paste by Shiferaw, Natnael, Habte, Lulit, Thenepalli, Thriveni, Ahn, Ji Whan

“…Eggshells are one of the solid wastes in the world and are considered hazardous according to European Commission regulations. The utilization of solid wastes,…”
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Synthesis of mesoporous silica from bottom ash and its application for CO2 sorption by Chen, Chao, You, Kwang-Seok, Ahn, Ji-Whan, Ahn, Wha-Seung

“…A supernatant solution of silicate species extracted from bottom ash in a power plant was used to prepare a mesoporous silica by the synthesis protocol of…”
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