• 한국광물학회지
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• 제10권2호
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• pp.114-125
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• 1997

The purpose of this study is to clarify the geological occurrence, mineralogical, physico-chemical and thermal properties of the sericite ore which located in Chungha area, Kyungsangbuk-do. The geology of this area are composed mainly of hornfels and some felsite porphyry. The sericitic ore is classified into sericite, sericite-quartz and quartz-sericite ore according to mineral assemblages. Mineral components in sericite ore are mainly sericite with minor quartz, apatite, sphene, zircon, ilmenite, bismuthinite, iron oxide and etc. Sericite-quartz ore are mainly composed of sericite and quartz. Accessary minerals are muscovite, epidote, zircon, sphene, iron oxide and etc. The chemical compositions of K2O, Al2O3, & Ignition loss in sericite and sericite-quartz ore increase than that of the host rock, while the composition of SiO2, Na2O & Fe2O3 decrease. Sericite and sericite-quartz ore are characterized by the specific gravity of 2.35 and 2.44, the pH of 4.36 cP and 2.36 cP respectively. The result of size analyses of sericite ore is 11.3% in grain volume concentration between 12.9 $\mu\textrm{m}$ and 11.1$\mu\textrm{m}$, and 32.3% between 9.6$\mu\textrm{m}$ and 12.9$\mu\textrm{m}$. The thermal expansivity of sericite and sericite-quartz ore show the similar pattern. The sericite ore shows the thermal expansivity of 0.31% at 50$0^{\circ}C$, 0.39~0.75% at 600~1,00$0^{\circ}C$ and 0.74% at 1,10$0^{\circ}C$. The sericite-quartz ore show the thermal expansivity of 0.29% at 50$0^{\circ}C$, 0.36~0.72% at 600~1,000% and 0.71% at 1,10$0^{\circ}C$.

• 한국광물학회지
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• 제11권2호
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• pp.85-96
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• 1998

The sericite ore is formed by the hydrothermal alteration of rhyodacitic welded tuff. The alteration zone of the host rock can be classified into four types based on the mineral assemblages ; sericite, quartz-sericite, silicified and propylite zone. The sericite ore mainly occurs as vein types and fault clay along the fault plane in the quartz-sericite zone. Mineral components of the sericite ore are mainly sericite with minor diaspore, corundum and pyrite. The sericitic porcelaineous ore is mainly composed of quartz and sericite. Accessory minerals are muscovite, diaspore, sphene, corundum, pyrite, iron-oxides and etc. The chemical compositions of K2O, Al2O3, and ignition loss in the sericite ore increase largely than that of the host rock, while the compositions of SiO2, Na2O and Fe2O3 decrease. XRD patterns of the heat-treated sericite ores show the formation of mullite at $1,200^{\circ}C$. and the diaspore-bearing sericite ore forms mullite and corundum at $1,200^{\circ}C$. The differential thermal analysis of the sericite ores show small endothermic peak at 645~668$^{\circ}C$. and the diaspore-bearing sericite ore shows a strong endothermic peak at $517^{\circ}C$. It indicates that the decomposition of diaspore appear at lower temperature than that of sericite. The thermal expansivity of the sericite ores show the similar pattern. The sericite ores show the thermal expansivity of 3.3~4.7% at 900$^{\circ}C$ and 0.39~0.75% at 1,20$0^{\circ}C$, respectively. DTA-TG curves of the sericite ores show closely relations with the thermal expansivity.

• Journal of the Korean Wood Science and Technology
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• 제14권4호
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• pp.8-13
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• 1986

To investigate effect of sericite on pilot Fourdrinier paper making for loading, with respectively 15% additive sericite on talc, we made newprint with TMP, and then tested sericite on talc, we made newprint with TMP, and then tested sericite and talc abrasion, physical and strength properites of the paper. Consequently, as a loading materials, sericite had outstanding properties different from talc from the result of this paper; 1. Sericite was a good loading materials because the quantity of abrasion was small. 2. Sericite had a good physical properties of Foudrinier paper because brightness. ash content and water absorption were high. 3. Newsprint paper strengthes of additive talc were nigher than those of additive sericite.

• 한국환경과학회지
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• 제24권9호
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• pp.1189-1197
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• 2015

The aim of this study was to investigate the nutrient removal using Mg-Sericite flocculant in the dyeing wastewater. Mg-Sericite flocculant was removed successfully > 98% of the Color, SS. COD and BOD in the dyeing wastewater at the following optimal Mg-Sericite dosage: 100 mg/L for Colour and SS, 300 mg/L for BOD and COD. The removal of TN and TP was obtained 92.00% with 50 mg/L and 87.80% with 100 mg/L Mg-Sericite dosage, respectively. These results was indicated that the amount of 0.79~1.31, 0.22~0.37, 0.5 and 0.16 mg/L Mg-Sericite was necessary for 1 mg/L removal BOD, COD, TN and TP, respectively. The biopolymer, Mg-Sericite, can be a promising flocculants due to its high efficiency and low dose requirements. In addition, Mg-Sericite does not contaminate treated wastewater, which can be recycled to reduce not only the cost and the demand for water but also the extra operational costs for reusing wastewater. This flocculation method is helpful to lower the wastewater treatment cost.

• 한국물환경학회지
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• 제31권6호
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• pp.625-631
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• 2015

In this study, low cost bio-flocculants, chitosan, cationic starch and Mg-sericite, were used as a flocculant to harvest freshwater microalgae, Chlorella vulgaris. Chitosan, cationic starch and Mg-sericite separated successfully >98% of C. vulgaris at following optimal parameters: 90 mg/L chitosan at pH 6-7, 70 mg/L cationic starch at pH 9-10 and 50 mg/L Mg-sericite at pH 4-5. A relatively high correlation coefficient (R²) of 0.9993 for chitosan, 0.9971 for catonic starch and 0.9924 for Mg-sericite was obtained. The investigated flocculants amount increased linearly with increasing the microalgae amount. The biopolymer, Mg-sericite, was more effective than that of other investigated flocculants. These results indicated that a bio-flocculants, chitosan, cationic starch and Mg-sericite, could prove to be an effective flocculant for economical production of microalgae biomass. In addition, Mg-sericite was more effective comparing to the other investigated flocculants.

• Environmental Engineering Research
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• 제22권3호
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• pp.312-319
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• 2017

The treatment of dyeing wastewater is not easy because dyes are mainly aromatic, heterocyclic compounds. The most effective technologies and methods to treat dyeing wastewater are costly and involve materials that are difficult to regenerate after use. Therefore, it is necessary to develop cost-effective, eco-friendly technologies to treat dyeing wastewater. The aim of this study was to investigate the removal of sulfur blue 11 (CI 53235) anionic dye using methyl esterified sericite (ME-sericite) adsorbents in an aqueous solution. The results are discussed in terms of the ME-sericite particle size, temperature, pH value and initial sorption rate according to the initial sulfur blue concentration. In addition, we analyzed the adsorption kinetics using a Pseudo-second-order model with the desorption and reusability. The methyl esterification caused a considerable increase in the specific surface area from 4.45 to $17.62m^2/g$. The ME-sericite adsorbents successfully removed > 98% of the sulfur dye in the aqueous solution. For the adsorption of 1 mg of sulfur dye, approximately 4.6 to 6.6 g/L ME-sericite were required. The desorption process was carried out by mixing a NaOH eluent to desorb 90.56% of the sulfur dye with 2 h of contact time. Thus, the ME-sericite is a promising adsorbent to treat dyeing wastewater due to its low dose requirement, high removal efficiency and inexpensive material.

• 한국물환경학회지
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• 제31권3호
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• pp.328-333
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• 2015

In this study, Mg-Sericite was used as a flocculant to harvest freshwater microalgae, Chlorella. vulgaris. Mg-Sericite separated successfully >95% of the C. vulgaris at the following optimal parameters: Mg/Si mol ratio 1.25 to 1.50, mixing time of 20 min and settling time of 20 min. The harvesting efficiency was pH dependent. The highest harvesting efficiency ($99{\pm}0.3%$) was obtained at Mg/Si mol ratio 1.5 and pH 9 to 11. These results indicated that a biopolymer, Mg-Sericite, can be a promising flocculant due to its high efficiency, low dose requirements, short mixing and settling times. This harvesting method is helpful to lower the production cost of algae for biodiesel.

• 한국광물학회지
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• 제11권2호
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• pp.69-84
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• 1998

The Daehyun sericite deposit in socheon-myun, Bongwha-gun, Kyungsangbuk-do, Korea, has been formed by the hydrothermal alteration of the Hongjesa granite of Precambrian age, leaving the muscovite granite between ore body and the Hongjesa granite as the wall rock alteration zone. The process of sericitization of granitic rock as well as chemistry and structures of sericites were studied using polarizing microscope, X-ray diffractometer (XRD), electron probe microanalyzer (EPMA) and high resolution transmission electron microscope (HRTEM). There are two genetic types of sericites having different chemistry and structure. The early sericite is of 2M1 polytype and has octahedral composition close to muscovite. It has been formed from the primary muscovite, tourmaline and quartz under a relatively high temperature. The late sericite is of 1M, 2M1 and 3T polytypes and has phengitic composition. It has been formed form feldspar, biotite, muscovite and tourmaline under a relatively low temperature. Chemical analyses show t, the early sericite has less Mg+FeT content and lower Si/AlIV ratio in tetrahedral site than the late sericite.

• 한국지반환경공학회 논문집
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• 제14권8호
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• pp.29-35
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• 2013

본 연구에서는 점토광물인 황토 지장수와 견운모 상등액을 이용하여 콩나물의 생장률과 무기이온의 함량을 비교하고자 하였다. 실험결과 콩나물의 총 길이는 견운모 상등액 콩나물이 황토 지장수에 비해 14.71%, 수돗물에 비해 50% 길었다. 또한 뿌리의 길이는 견운모 상등액 콩나물의 뿌리가 황토 지장수에 비해 36.05%, 수돗물에 비해 17.30% 길었다. 이는 견운모에 함유되어 있는 $K^+$ 성분과 미네랄이 식물의 뿌리에 작용하여 줄기도 윤기가 있게 성장을 한 것 같다. 견운모 상등액 콩나물의 경우 황토지장수로 재배한 콩나물에 비해 11.56%, 수돗물과 비교하여 13.48%의 많은 미네랄을 함유하고 있었다. 다양한 견운모의 농도를 이용하여 콩나물의 생장률과 미네랄 흡수량을 비교한 결과 100g/L의 농도에서 가장 좋은 생장률을 나타내었고, 미네랄의 흡수량은 100g/L와 200g/L가 비슷하여 경제적인 면을 고려한다면 100g/L의 농도가 콩나물을 재배하는데 적합하다고 생각된다.

• 공업화학
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• 제29권5호
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• pp.571-580
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• 2018

본 연구에서는 수용액에서 Pb(II)를 흡착 제거하기 위하여 커피찌꺼기(spent coffee grounds; SCG)와 점토광물인 견운모(sericite)를 혼합하여 복합흡착제(SS)를 제조하였다. FT-IR 분석결과 SS의 주요 관능기는 O-H, C=O와 C-N 그룹이었다. SS의 비표면적, 기공직경 그리고 양이온 치환 용량은 SCG와 sericite보다 크고, 높았다. SS 흡착제 제조를 위한 최적의 조건은 소성온도 $300^{\circ}C$, SCG : sericite 비율 8 : 2, 입자의 크기는 0.3 mm이었다. SS 흡착제를 이용하여 Pb(II)를 제거하기 위한 실험에서는 Langmuir 흡착식이 Freundlich보다 적합하였으며, Langmuir 등온흡착식에 의한 Pb(II)의 최대 흡착용량은 44.42 mg/g이었다. 또한, 열역학 분석에 의하면 SS 흡착제를 이용한 Pb(II)의 흡착 공정은 물리적인 흡착이었으며, 자연적인 발열반응이었다. SS 흡착제의 흡착-탈착 실험에서는 88-92%를 회수할 수 있었으나, 탈착 횟수가 증가할수록 SS 흡착제의 활성사이트는 감소하였다. 위의 실험결과 SS 흡착제는 전처리 없이 저렴하고, 효율적으로 Pb(II)를 수용액에서 흡착 제거할 수 있다.