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Synthesis and characterization of Na-X and Na-A zeolites and adsorption removal of Cu(II)
( Ganesh Kumar Reddy ),최유림,김동수,( Koduru Janardhan Reddy ),장윤영,양재규 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Chronic exposure to high levels of copper can damage the liver and kidneys and may lead to Wilson’s disease, other genetic disorders, and even death. Na-X and Na-A zeolites were synthesized from waste coal fly ash by fusion method. Prepared zeolites such as Na-X and Na-A were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analysis and cation exchange capacity (CEC) were investigated. The adsorption removal of Copper (II) by Na-X and Na-A and the adsorption capacity of Cu(II) comparable with commercial zeolites. The adsorption of Copper (II) on zeolites was studied as initial metal concentration, Solution pH, Contact time and ionic strengths. The experimental data of adsorption were interpreted in terms of Freundlich and Langmuir equations and adsorption kinetics data of removal of Copper (II) were studied via pseudo first order and pseudo second order models.
Simple Synthesis Of Graphitic Carbon Nitride Based Composite For Heavy Metals Removal From Water
Janardhan Reddy Koduru(Koduru Janardhan Reddy),Zahid Husain Momin,Lakshmi Prasanna Lingamdinne,Ganesh Kumar Reddy Angaru,Yoon-Young Chang(장윤영),Jae-Kyu Yang(양재규) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11
Kumar, Arthikala Manoj,Sreevathsa, Rohini,Reddy, Kalpana Nanja,Ganesh, Prasa Trichy,Udayakumar, Makarla 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.2
Agrobacterium tumefaciens mediated in planta transformation protocol was developed for castor, Ricinus communis. Two-day-old seedlings were infected with Agrobacterium strain EHA105/pBinBt8 harboring cry1AcF and established in the greenhouse. Screening the $T_1$ generation seedlings on 300 mg $L^{-1}$ kanamycin identified the putative transformants. Molecular and expression analysis confirmed the transgenic nature and identified high-expressing plants. Western blot analysis confirmed the co-integration of the nptII gene in the selected transgenic plants. Bioassay against Spodoptera litura corroborated with high expression and identified five promising effective lines. Analysis of the $T_2$ generation plants proved the stability of the transgene indicating the feasibility of the method.
화력발전소 석탄비산재를 이용한 Na-X와 Na-A 제올라이트 제조 및 상업용 제올라이트와의 Cu(II) 흡착 특성 비교
최유림,Ganesh Kumar Reddy Angaru,김동수,안혜영,김대호,최치동,KODURU JANARDHAN REDDY,양재규,장윤영 한국공업화학회 2019 공업화학 Vol.30 No.6
본 연구에서는 화력발전소에서 채취한 석탄 비산재(coal fly ash)로부터 fusion method를 이용하여 중금속 흡착 성능이뛰어난 Na-X과 Na-A 제올라이트를 합성하였다. 또한 이를 이용하여 Cu(II) 흡착 성능을 상업용 Na-X 및 Na-A 제올라이트와 비교하였다. 제올라이트의 최적 합성 조건을 선정하기 위해 fusion method의 주요 영향인자인 NaOH 주입비율, 숙성시간(aging time), 수열반응 시간(hydrothermal reaction time), NaAlO2 (Na-A) 주입비율의 변화에 의한 제올라이트의특성을 고찰하였다. 그리고 XRD, CEC, BET, SEM 분석을 실시하였으며, 최적의 제올라이트 합성 조건은 NaOH 주입비율 = 1.5, 숙성시간 = 6 h, 수열반응 시간 = 6 h, NaAlO2 (Na-A) 주입 비율 = 0.5인 것으로 확인되었다. Langmuir 등온 흡착곡선의 분석결과, Cu(II)에 대한 최대 흡착 농도는 합성된 Na-X와 Na-A 제올라이트의 경우 각각 90.1와105.26 mg/g, 상업용 Na-X와 Na-A 제올라이트의 경우 각각, 102.05와 109.89 mg/g으로 나타나 Cu(II) 흡착 성능에 있어서 합성 제올라이트와 상업용 제올라이트가 유사한 결과를 보여주었다. 따라서 본 실험의 결과들은 화력발전소 석탄비산재의 제올라이트 합성 재료로서의 활용 가능성을 나타내었다.
B., Kiran Kumar,Gyani, Jayadev,Y., Bhavani,P., Ganesh Reddy,T, Nagasai Anjani Kumar International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.10
Nowadays software defect prediction (SDP) is most active research going on in software engineering. Early detection of defects lowers the cost of the software and also improves reliability. Machine learning techniques are widely used to create SDP models based on programming measures. The majority of defect prediction models in the literature have problems with class imbalance and high dimensionality. In this paper, we proposed Centroid and Nearest Neighbor based Class Imbalance Reduction (CNNCIR) technique that considers dataset distribution characteristics to generate symmetry between defective and non-defective records in imbalanced datasets. The proposed approach is compared with SMOTE (Synthetic Minority Oversampling Technique). The high-dimensionality problem is addressed using Ant Colony Optimization (ACO) technique by choosing relevant features. We used nine different classifiers to analyze six open-source software defect datasets from the PROMISE repository and seven performance measures are used to evaluate them. The results of the proposed CNNCIR method with ACO based feature selection reveals that it outperforms SMOTE in the majority of cases.
Arthikala Manoj Kumar,Rohini Sreevathsa,Kalpana Nanja Reddy,Prasa Trichy Ganesh,Makarla Udayakumar 한국작물학회 2011 Journal of crop science and biotechnology Vol.14 No.2
Agrobacterium tumefaciens mediated in planta transformation protocol was developed for castor, Ricinus communis. Two-day-old seedlings were infected with Agrobacterium strain EHA105/pBinBt8 harboring cry1AcF and established in the greenhouse. Screening the T1 generation seedlings on 300 mg L^(-1) kanamycin identified the putative transformants. Molecular and expression analysis confirmed the transgenic nature and identified high-expressing plants. Western blot analysis confirmed the co-integration of the nptII gene in the selected transgenic plants. Bioassay against Spodoptera litura corroborated with high expression and identified five promising effective lines. Analysis of the T2 generation plants proved the stability of the transgene indicating the feasibility of the method.
비소 오염토양의 안정화를 위한 나노 Fe°담지 바이오차 적용 연구
최유림 ( Yu-lim Choi ),( Ganesh Kumar Reddy Angaru ),안혜영 ( Hye-young Ahn ),박광진 ( Kwang-jin Park ),주완호 ( Wan-ho Joo ),양재규 ( Jae-kyu Yang ),장윤영 ( Yoon-young Chang ) 한국환경영향평가학회 2020 환경영향평가 Vol.29 No.5
본 연구에서는 전정가지 부산물과 one-pot 합성방법을 이용하여 철 나노입자가 담지된 바이오차인 INPBC(Iron Nano-Particles Impregnated BioChar)를 제조하고 비소 오염토양의 안정화제로써의 적용가능성을 평가하였다. INPBC는 전정가지 부산물과 Fe(III) 용액을 220°C에서 3시간 동안 수열반응하고 이후 N<sub>2</sub> 분위기에서 1시간 동안 소성하여 제조하였으며 FT-IR, XRD, BET, SEM을 이용하여 INPBC의 특성을 분석하였다. INPBC의 안정화 성능평가는 국내 E폐광산과 S폐광산의 인근 농경지에서 채취한 비소로 오염된 토양 Soil-E와 Soil-S를 채취하여 4주 동안의 배양실험을 실시하였다. 배양실험 후 토양중 비소의 안정화 정도를 알아보기 위해 TCLP와 SPLP 용출시험을 실시하였다. TCLP와 SPLP의 용출시험결과, INPBC의 적용 농도의 증가에 따라 토양 중 비소의 용출농도는 감소하여 안정화 효율이 높아지는 것을 확인할 수 있었으며, 특히 Soil-E의 경우 SPLP 용출액 중 비소의 농도는 먹는물 수질기준치 이하의 낮은 값을 나타내었다. 안정화 토양의 연속추출시험에서는 쉽게 용출되는 1단계 및 2단계의 분획비율이 감소되고 그 보다 용출이 어려운 3단계 및 4단계의 분획비율이 증가되는 것을 확인할 수 있었으며, 이러한 결과는 오염토양에 주입한 INPBC의 표면에 존재하는 철 나노입자로 인해 토양에서 용출된 비소가 sorption에 의해 안정화된 것으로 판단된다. 본 연구에서 나타난 INPBC의 비소 오염토양의 안정화 효과는 대규모 비소오염토양의 위해성 저감을 위한 안정화제로서 높은 적용 가능성을 보여 준다. In this study, nano Fe°-impregnated biochar (INPBC) was prepared using pruning residues and one-pot synthetic method and evaluated its performance as an amendment agent for the stabilization of arsenic-contaminated soil. For the preparation of INPBC, the mixture of pruning residue and Fe (III) solution was heated to 220°C for 3hr in a teflon-sealed autoclave followed by calcination at 600°C under N<sub>2</sub> atmosphere for 1hr. As-prepared INPBC was characterized using FT-IR, XRD, BET, SEM. For the stabilization test of as-prepared INPBC, As-contaminated soils (Soil-E and Soil-S) sampled from agricultural sites located respectively near E-abandoned mine and S-abandoned mine in South Korea were mixed with different of dosage of INPBC and cultivated for 4 weeks. After treatment, TCLP and SPLP tests were conducted to determine the stabilization efficiency of As in soil and showed that the stabilization efficiency was increased with increasing the INPBC dosage and the concentration of As in SPLP extractant of Soil-E was lower than the drinking water standard level of Ministry of Environment of South Korea. The sequential fractionation of As in the stabilized soils indicated that the fractions of As in the 1st and 2nd stages that correspond liable and known as bioavailable fraction were decreased and the fractions of As in 3rd and 4th stages that correspond relatively non-liable fraction were increased. Such a stabilization of As shows that the abundant nano Fe° on the surface of INPBC mixed with As-contaminated soils played the co-precipitation of As leaching from soil by surface complexation with iron. The results of this study may imply that INPBC as a promising amendments for the stabilization of As-contaminated soil play an important role.