An improved process for synthesis of Venlafaxine from p-methoxyphenylacetonitrile with cyclohexanone using TBAI as phase transfer catalysis to give almost quantitative yields of cycloalkanols, further is reduced using Raney/nickel in methanolic ammonia, acetic acid and dimethylation using dimethyl carbonate/K2CO3 in DMF. The work is also included to identification, synthesis and characterization of process related impurities of venlafaxine
2017050111-A novel green process for synthesis of venlafaxine and its impurities pdf…
Some physicochemical parameters related to groundwater quality obtained from Uppodai sub basin of Tambaraparani river basin of Tamilnadu was investigated for the purpose of drinking. Total 15 groundwater samples are collected from tube wells during the month of July 2013. In the groundwater samples analysed in physic properties and chemical characters such as pH, EC, TDS, major cations and major anions were measured using standard procedure. The physical properties values are varied from pH (7.4 to 8.9), EC (460 μmho/cm to 6100 μmho/cm) and TDS (294 to 3904). Similarly major ions Ca (72 to 416), Mg (2.44 to 112.24), Na (19 to 446), K (3 to 48), HCO3 (183 to 951), SO4 (7 to 168), Cl (142 to 525) and F (0.5 to 2.0) all parameters except pH and EC indicate the unite of mg/l. all the measured parameters compared with WHO (2011) standard for drinking water quality permissible limit. In this case the study area samples are occurred some samples above and below the limit, which is the affect the some anthropogenic activities.
2016040223Physicochemical Characteristics of groundwater quality in Uppodai sub basin of Tambaraparani River basin…pdf
A hydro geochemical study was conducted in Ariyalur region situated in the southeast of Tamil Nadu, India to identify suitability of groundwater for drinking, domestic and agricultural purposes. To have a synoptic view of geochemical processes in the region, a total of 73 groundwater samples were collected and analyzed for cations and anions. The geochemical parameters were compared with WHO and it was found that most of the samples are unsuitable for drinking purpose. The samples were classified with parameters like sodium absorption ratio, residual sodium carbonate, total hardness, chloride, index to Base Exchange, electrical conductivity and faces to determine their suitability for irrigation purpose. The geochemical faces of the groundwater have been studied by Gibbs plot and reconstructed piper plot which shows that weathering, ion exchange and anthropogenic processes controlling the groundwater chemistry in the region.
201604011A study on the hydrogeochemical processes groundwater quality of Ariyalur pdf.
Water is essential for both animal and plant kingdom and also for industrial, agricultural and domestic needs. Now a day the available surface water is not fulfilling the needs of human beings. Hence to meet the demand of water the Groundwater resources are tapped. Ground water is a good source of fresh water available on the earth. It is an important renewable resource having several inherent advantages over surface water. Its wide distribution, negligible evaporation loss and low risk of contamination are considered as important qualities of groundwater. Geochemistry of surface and ground water plays a major role for determining its chemical quality which is determined by mineral composition of aquifer through which water flows. In order to understand the groundwater chemistry. In order to understand the hydro geochemistry about 65 groundwater samples have been collected from bore wells during post monsoon season. The important parameters like pH, EC, TDS and major cations and anions were analysed. The pH and EC are varying from 6.4 to 8 and 307 to 4732 µs/cm. The TDS are varying from 146 to 2892 mg/l. The minimum and maximum chemical concentration of cations such as Ca, Mg, Na, K are 24 to 262 mg/l, 18 to 201 mg/l, 98 to 793 mg/l and 16 to 139 mg/l respectively. Similarly, the minimum and maximum concentration of anions like Cl, SO4, HCO3 and NO3 are 76 to 1282.8 mg/l, 0.8 to 4.8 mg/l, 248.8 to 1432 mg/l and 0.01 to 0.78 mg/l respectively. The data has interpreted with Diamond field of piper diagram to understand the water type, source of contamination and facies. The Gibbs plot interpretation favours the rock-water interaction and with minor representation in evaporation zone. The quality of water for irrigation was estimated by USSL plot. The suitability of water for its utility was verified using Indian and WHO standards. The result shows that most of the samples are suitable for drinking and irrigational purpose except few samples.
1503029 Hydro geochemical Study of Groundwater in Chinnar Sub-Basin of Vellar River
The present study was aimed at assessing Trace element ground water chemistry and drinking purpose. Totally 20 groundwater samples were collected from different locations in Gomukhi sub basin, Vellar basin Tamil nadu. The groundwater sample collected during the February 2014. The toposheets is 58I/9, 10, 13, 14 and 58M/1, 2. The toposheets 1:50,000 scale. Geologically the study area chonockite and Hornblende biotite gneiss is the dominant of covering major parts of the study area, Followed by the Fissile hornblende gneiss, Basic dykes some parts coverd. The present investigation was based on the occurrence of trace elements such as Fe, Mn, Cr, Cu, Ni, Co, Zn, Pb, and Cd in groundwater samples, concentration ranging from 0.003 to 0.186, 0.016 to 0.718, 0.912 to 0.965, 0.009 to 0.091, 0.143 to 0.332, 0.012 to 0.301, 0.002 to 1.006, 0.260 to 0.474 and 0.023 to 0.052 respectively. The analysis of ground water results were compared to WHO (2011) drinking water standards. The concentration of Fe, Cu, Zn, elements in permissible limit, and Cr, Ni, Pb, Cd elements in above the permissible limit.
A16STUDY OF TRACE ELEMENTS IN GROUNDWATER OF GOMUKHI SUB BASIN, VELLAR BASIN TAMIL NADU, SOUTH INDIA pdf
In this study, 7 Vertical Electrical Soundings were carried out at coastal region of east coast of lower Tamiraparani river basin, Thoothukudi district to understand the fresh groundwater potential zones. Geologically it comprises with Quarternary Marine Deposit and Quarternary Fluvio-Marine Formation. The field resistivity data were interpreted with ipi2win software. The overall resistivity and layer thickness are varied from 0.153 ohm m to 4902ohm m and 0.49m to 78.7m respectively. From the resistivity interpretation, it is suggested that the VES-2, 3 & 7 are favourable for fresh groundwater development in the coastal zone of sedimentary terrain.
A15IDENTIFICATION OF FRESH GROUNDWATER IN COASTAL AQUIFERS USING ELECTRICAL RESISTIVITY TECHNIQUES IN COASTAL REGION OF LOWER TAMIRAPARANI RIVER BASIN pdf