Hydrochemical Evaluation of Water Quality and Trophic State Status of Saheb Bandh Lake, Purulia

Saheb bandh lake is an important wetland ecosystem of Purulia district and is well known for its biological diversity, aesthetic beauty, recreation and multipurpose features. In the present study an attempt is made to evaluate water quality as well as trophic state status of the lake. Lake water is mostly of Mg-HCO3 type. Relationship between different ionic ratios indicates that weathering of silicate minerals is generally considered to be the major source of alkalis in the lake water. Regarding drinking and irrigation water suitability criteria all the samples are moderately suitable. According to United States Salinity Laboratory (USSL) classifications lake water falls in medium salinity – low sodium category. Trophic State Index (TSI) indicates that the eutrophic nature exhibit in this lake.  The ratio of total nitrogen and total phosphorus reflects that the lake is phosphorus dominant in respect of nutrient.

IPA-Open access -Distributed under Creative Commons Attribution License 2.0 Environmental noise assessment and its effect on human health in an urban area

ABSTRACT Traffic noise is a major environmental source of pollution in the whole planet, both in developed and in developing nations. The present study focuses on the traffic noise assessment and its negative health effect on road side residents. Five different locations were selected along a National Highway of Burdwan having a day time L eq level of 60 to 89.5 dBA. Evaluation of various noise descriptors such as L 10 , L 50 , L 90 , L eq , L NP and TNI showed that people of the study area got suffered from slight uncomfortable feeling to a position of noise annoyance. Assessment of health effects among the 52 peoples of 10 families residing in the study areas for long time was conducted through a questionnaire based survey. Responses from the people were collected for analysis and the outcome revealed that 53%, 36%, 40% of people were suffered from headache, anxiety and high blood pressure whereas 36%, 15%, 67% and 61% of people were suffered from hearing disability, cardiovascular diseases, irritability and insomnia respectively. Chi-Square test was conducted among the different physiological and psychological effects and it was found that noise has a significant (α = 0.05) effect on hearing loss, sleep disturbances, abnormal heart beat and speech communication problem

Fluoride-contaminated groundwater of Birbhum district, West Bengal, India: Interpretation of drinking and irrigation suitability and major geochemical processes using principal component analysis

The present research work is confined to a rural tract located in the north-western part of Birbhum district, West Bengal, India. Chemical analysis of the groundwater shows the cations is in the order of Na+ > Ca2+ > Mg2+ while for anions it is HCO3 ─ > Cl─ > SO4 2─ > NO3 ─. The F─ concentration was found to vary from 0.01 to 18 mg/L in the pre-monsoon and 0.023 to 19 mg/L in post-monsoon period. 86% of samples show low F─ content (1.2 mg/L) mainly in the central and north-central parts of the study area at a depth of 46 to 98 m. The prime water type is CaHCO3 succeeded by F─-rich NaHCO3 and NaCl waters. The suitability analysis reveals that the water at about 81% of the sampling sites is unsuitable for drinking and at 16% of sites unsuitable for irrigation. The alkaline nature of the water and/or elevated concentration of Fe, Mn and F─ make the water unsuitable for potable purposes while the high F─ and Na+ contents delimit the groundwater for irrigation uses. Multivariate statistical analysis suggests that chemical weathering along with ion exchange is the key process, responsible for mobilization of fluoride in groundwater of the study area

Life threatening posterior reversible encephalopathy syndrome in systemic lupus erythematosus

Posterior reversible encephalopathy syndrome (PRES) is a condition characterized by headache, altered mental status, seizure and visual dysfunction, and transient motor deficit. The incidence of PRES in systemic lupus erythematosus (SLE) has not been clearly known. Risk factors for PRES in SLE include hypertension, renal failure, cytotoxic drugs, and active lupus. We describe a patient of SLE with nephritis on cyclophosphamide monthly pulse that developed PRES and, unfortunately, succumbed to her illness

Calcinosis cutis secondary to facial acne vulgaris: A rare complication

Acne vulgaris is a common dermatological disease commonly affecting the adolescent and young adults. It is characterized by the presence of pleomorphic skin lesions such as comadones, papules, pustules, and nodules. The common complications are postacne hyperpigmentation and scarring causing psychological impact. Calcinosis cutis is the pathologic deposition of insoluble calcium salt in the skin and subcutaneous tissue. Calcinosis cutis following acne vulgaris is rarely reported in the literature. We report a case of calcinosis cutis in acne vulgaris in a 55-year-old man

Spatio-Temporal Variation and Futuristic Emission Scenario of Ambient Nitrogen Dioxide over an Urban Area of Eastern India Using GIS and Coupled AERMOD-WRF Model.

The present study focuses on the spatio-temporal variation of nitrogen dioxide (NO2) during June 2013 to May 2015 and its futuristic emission scenario over an urban area (Durgapur) of eastern India. The concentration of ambient NO2 shows seasonal as well as site specific characteristics. The site with high vehicular density (Muchipara) shows highest NO2 concentration followed by industrial site (DVC- DTPS Colony) and the residential site (B Zone), respectively. The seasonal variation of ambient NO2 over the study area is portrayed by means of Geographical Information System based Digital Elevation Model. Out of the total urban area under consideration (114.982 km2), the concentration of NO2 exceeded the National Ambient Air Quality Standard (NAAQS) permissible limit over an area of 5.000 km2, 0.786 km2 and 0.653 km2 in post monsoon, winter and pre monsoon, respectively. Wind rose diagrams, correlation and regression analyses show that meteorology plays a crucial role in dilution and dispersion of NO2 near the earth's surface. Principal component analysis identifies vehicular source as the major source of NO2 in all the seasons over the urban region. Coupled AMS/EPA Regulatory Model (AERMOD)-Weather Research and Forecasting (WRF) model is used for predicting the concentration of NO2. Comparison of the observed and simulated data shows that the model overestimates the concentration of NO2 in all the seasons (except winter). The results show that coupled AERMOD-WRF model can overcome the unavailability of hourly surface as well as upper air meteorological data required for predicting the pollutant concentration, but improvement of emission inventory along with better understanding of the sinks and sources of ambient NO2 is essential for capturing the more realistic scenario