• Proceedings of the KSEEG Conference
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• 2002.04a
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• pp.34-36
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• 2002

• Proceedings of the Korean Environmental Sciences Society Conference
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• 1999.04a
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• pp.116-119
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• 1999

• Proceedings of the Korean Environmental Sciences Society Conference
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• 1999.10a
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• pp.80-83
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• 1999

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.474-477
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• 2003

산성가스용 방독마스크 정화통은 활성탄에 정화제를 첨착시킨 첨착 활성탄을 사용하여 유해가스를 제거하여 왔으며, 일반적으로 알칼리제인 Ca(OH)$_2$를 첨착시켜 유독가스와 중화반응을 유도하여 왔다. 그러나 이들의 흡착제거 능력이 크지 않아 많은 양을 사용하여야 하는 문제점이 있었다. 따라서 정화통의 성능을 좌우하는 새로운 첨착물질을 선정하여야 고효율ㆍ저비용 정화통을 개발할 수 있으며, 본 연구에서는 이러한 첨착흡착제를 개발하여 이를 방독마스크 정화통에 적용하고자 하였다.(중략)

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2006.05a
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• pp.141-143
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• 2006

Carboxylic phthalocyanine합성물을 분석한 결과 Copc의 Co가 3.06Wt.(%)에서 Cooapc가 0.28Wt.(%)로 나타난 것으로 보아 carboxylic group이 증가한 것을 알 수 있었으머, Fepc도 같은 결과로 나타났다. 휘발성유기화합물의 제거효율을 분석한 결과 극성이 높은 물질은 쉽게 흡착 되었으며 일부 제거가 되지 않은 물질은 Fig.3, Fig.4에서 보는바와 같이 Feoapc보다는 Cooapc가 제거효율이 높은 것으로 나타났다.

• Journal of the Korean Geotechnical Society
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• v.27 no.4
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• pp.43-50
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• 2011

Steel-making slag was investigated as reactive material for removal of cadmium in coastal area. Batch experiments of the sorption isotherm experiment and kinetic sorption experiment were performed. Result of sorption isotherm was more adequately described by Langmuir model than Freundlich model and theoretical maximum capacity (${\beta}$) of cadmium onto steel-making slag was found. Results of kinetic sorption experiments were evaluated by pseudo second order model to investigate sorption characteristics of cadmium onto steel-making slag. Results showed that the equilibrium sorption amount of cadmium (q$q_e$) increased and the rate constant ($k_2$) and initial sorption rate (h) decreased as the initial cadmium concentration increased. The $q_e$ with simulated sea water was similar to that with deionized water and $k_2$ and h with simulated sea water was lower than those with deionized water. Results of kinetic experiments could be used to predict the result from sorption isotherm, since equilibrium sorption amounts calculated by pseudo second order model generally agreed with those measured from sorption isotherm. The reaction time for the target removal rate could be calculated by the pseudo second order model using kinetic sorption tests results.

• Journal of Environmental Impact Assessment
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• v.32 no.6
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• pp.431-436
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• 2023

As the industry develops, the amount of heavy metals flowing into the ecosystem is increasing. Heavy metals are difficult to decompose and remain in the ecosystem for a long time and cause toxicity, which is removed by physicochemical methods such as adsorption, filtration, and chemical precipitation during water treatment. In this study, Alginate bead was selected as a chelating resin for adsorbing and removing heavy metals, and the Jellyfish Extract at Immunity reaction (JEI) were mixed to evaluate the adsorption efficiency of heavy metals accordingly. beads mixed with JEI showed high adsorption efficiency in lead (79-99%) and copper (64-70%) according to the characteristics of Alginate, and low adsorption efficiency in cadmium (25-37%) and zinc (5-6%). Although heavy metal adsorption did not increase in proportion to the content of JEI, 50% and 100% JEI beads showed significant increases. As a result of applying the reaction rate equation, it was found that it was more suitable for the pseudo-secondary reaction equation than the pseudo-first reaction equation.

• Journal of Korean Society of Environmental Engineers
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• v.27 no.3
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• pp.247-252
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• 2005

The typical treatment method for fluoride polluted water is the flocculation and precipitation method which usually is capable of reducing the fluoride concentration down to the level of about 10 ppm. However, this method is no longer effective for the treatment of contaminated water having less than 10 ppm of fluorides. To remove fluorides in polluted water from the fluoride concentration between 1 to 10 ppm, several adsorbents were prepared mainly based on an activated alumina and the fluoride removal efficiencies of the adsorbents were analyzed. The best fluoride removal efficiency was obtained when the activated alumina treated by sulfuric acid was used as the adsorbent. A proper calcination temperature for the sulfuric acid contained activated alumina was found to be about $500^{\circ}C$. An adsorption isotherm for the adsorbent was also obtained by using Freundlich model. The values of the constants in Freundlich isotherm model were calculated to be K=6.63 and 1/n=0.29 based on the results obtained from the series of batch type adsorption experiments.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.7
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• pp.4675-4681
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• 2014

This study examined the $H_2S$ removal characteristics, such as breakthrough time, adsorption capacity, and adsorption rate of adsorbents between Zeolite 3A and DETOX in terms of the $H_2S$ inflow concentration and adsorption temperature. The adsorption capacity of Zeolite 3A increased with increasing mass flow rate of hydrogen sulfide($H_2S$) inflow, but the breakthrough time decreased. On the other hand, both the adsorption capacity and breakthrough time of DETOX decreased with increasing mass flow rate of $H_2S$ inflow. The adsorption capacity and breakthrough time of Zeolite 3A decreased with increasing adsorption temperature but those of DETOX increased. The adsorption capacity of DETOX was higher than that of Zeolite 3A by a factor of 2.5 - 16.4 because the collision frequency that overcomes the activation energy barrier increased with increasing adsorption temperature. For Zeolite 3A and DETOX, the adsorption rate of $H_2S$ increased with increasing mass flow rate of $H_2S$ inflow and adsorption temperature. The adsorption rate of $H_2S$ for Zeolite 3A was 4 times as much as that for DETOX. For the removal of $H_2S$ in biogas, DETOX had an advantage over Zeolite 3A because DETOX had a much longer breakthrough time and greater adsorption capacity in the temperature range of 308~318K than Zeolite 3A.

• Journal of the Mineralogical Society of Korea
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• v.30 no.4
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• pp.195-204
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• 2017

For evaluation of adsorption characteristics of heavy metals, precipitates were collected from stream bottom in the Dalseong mine. The removal of some heavy metals such as As, Cu, and Cd from aqueous solution is studied using a precipitates taken from acid mine drainage. The yellowish brown (Munsell color 8.75YR 5/10) and dark brown (Munsell color 2.5YR 3/8) precipitates that collected from the study area consist mainly of schwertmannite and goethite, respectively. The percentage removal or adsorption capacity of metals depends on the initial concentration and characteristics of adsorbent. Removal efficiency of the adsorbents shows the order for metal ions of As > Cu > Cd. The adsorption efficiency by absorbent of precipitates in low concentration metal aqueous solution were observed 67.00-85.00% for As, 26.24-29.08% for Cd, and 7.67-12.82% for Cu. As the initial concentration of metal ions was increased from 1 to 10 mg/L, adsorption amount of adsorbent increased from 0.29 to 1.29 mg/g of Cu of schwertmannite, and from 0.24 to 1.97 mg/g of goethite.