http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Arukkani Murugesan (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Thangaraj Vidhyadevi,Murugesan Arukkani,Kalaivani Selvaraj,Premkumar Manickam Periyaraman,Ravikumar Lingam,Sivanesan Subramanian 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.4
Poly(chlorobenzalimino thiourea amide) (PCBA) resin was synthesized by using the phosphorilation polycondensation method. PCBA was characterized by analytical techniques, and it was used for the adsorption of heavymetals (Ni2+ and Zn2+) and anionic dyes (methyl orange (MO) and acid orange (AO)). The variables which affect theadsorption efficiency, such as pH, adsorbate concentration, adsorbent dose and contact time were studied. The resultsshow that the adsorption of Ni2+, Zn2+, MO and AO follows the pseudo-second order kinetic model. The maximummonolayer adsorption capacity of PCBA for Ni2+, Zn2+, MO and AO, calculated using Langmuir isotherm is 191.2,247.1, 153.8, 149mg/g, respectively. Surface area (21.1m2/g) and crystal size are 21.1m2/g and 0.35 nm, respectively. High efficiency of the polymeric resins may be due to their amorphous nature and the presence of strong binding sitesin the polymer structure. Thermodynamic parameters such as change in standard free energy change, enthalpy andentropy ΔGo, ΔHo and ΔSo were evaluated, and the adsorption process was found to be feasible, exothermic and spontaneous. Desorption studies show that adsorption efficiency of PCBA was retained even after four cycles.
-
Munireddy Rajendraprasad,Murugesan Loganathan,Arukkani Murugesan,Ponnusamy Senthil Kumar,Gayathri Rangasamy 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.7
Utilization of the biomass with simple preparation method is one of the keys to prepare cost-eff ective photocatalysts. Photocatalysts such as oxidized activated carbon (OAC), Ni-, Co- doped OAC (MOAC) were prepared from bio-waste Calophyllum inophyllum (punnai) shells via physico-chemical activation. The characterization of photo-catalysts using SEM-EDAX, XRD and FT-IR analysis. The band-gap energy of photo-catalysts and their photo-catalytic activity were determined by DRS and PL analysis, and the surface morphology of the catalysts was confi rmed using SEM-EDAX analysis. The insertion of metals on the surface of the OAC and the eff ective functional groups of the catalysts were confi rmed by the FT-IR analysis. The photo-catalytic degradation of Rhodamine-B (Rh-B) was performed using prepared photo-catalysts under 16-W lowpressure mercury lamp-UV-light exposure. To attain maximum effi ciency, experimental parameters were optimized, such as solution pH (8), exposure time (100 min), photo-catalyst dosage (150 mg), and initial dye conc. (30 mg/L). Ni- and Codoped OAC have achieved higher degradation effi ciency (91.99% for NOAC and 97.28% for COAC) than OAC (35.55%) because of metal dopants acted as semiconductors, which play a vital role in dye-degradation process. Kinetics and isotherm parameters were evaluated using the eff ects of exposure time and initial dye conc. experimental data, respectively. Based on the experimental result, a degradation mechanism has been predicted. Metal-doped OAC is an effi cient material for degradation of dye-molecules from polluted-water due to its active adsorption sites. The formation of super oxide anion radicle to produce reactive hydroxyl radicles on metal surface, which enhanced the catalytic activity on the surface of the catalysts in the process of dye-degradation.
-
Removal of cadmium(II) from aqueous solution by agricultural waste cashew nut shell
Ponnusamy Senthil Kumar,Subramanian Sivanesan,Subramaniam Ramalingam,Vasanthakumar Sathyaselvabala,Selvaraj Dinesh Kirupha,Arukkani Murugesan 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.6
Cashew nut shell (CNS) is a low cost adsorbent that has been used for the removal of cadmium(II) from an aqueous solution. The effects of various parameters such as solution pH, CNS concentration, contact time, initial cadmium(II) concentration and temperature were examined. The CNS was effective for the quantitative removal of cadmium(II) ions in acidic conditions and equilibrium was achieved in 30 min. The experimental data were analyzed by two-parameter (Langmuir, Freundlich, Temkin and Dubinin-Radushkevich) and three-parameter models (Redlich-Peterson, Koble-Corrigan, Toth and Sips) by nonlinear regression analysis. The characteristic parameters for each isotherms and related correlation coefficients have been determined by using MATLAB 7.1. Thermodynamic parameters such as ΔGo, ΔHo and ΔSo have also been evaluated, and it was found that the sorption process was feasible, spontaneous and exothermic. Pseudo-first-order, pseudo-second-order, Elovich kinetic and intraparticle diffusion models were selected to follow the adsorption process. The results of the kinetic study show that the adsorption of cadmium(II)could be described by the pseudo-second order equation, suggesting that the adsorption process is presumably chemisorption. A single-stage batch adsorber was designed for different adsorbent dose-to-effluent volume ratios using the Freundlich equation. The results indicate that the cashew nut shell could be used to effectively adsorb cadmium(II)from an aqueous solution.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
