Vol. 7 & Issue 4 ; Section D : Environmental Sciences

Date : Aug. to Oct.2017

 

Assessment of Physico- Chemical Parameters of Water of Ulsoor Lake in Bangalore

Alimuddin

JCBPS; Section D; August 2017 – October, 2017, Vol. 7, No. 4; 801-804.

[DOI: 10.24214/jcbps.D.7.4.80104]

  • Abstract

    The Physico- Chemical parameters of Ulsoor Lake have been investigated. The water samples were collected from a point near the middle of the lake and analyzed for water quality parameters viz. Temperature, Dissolved oxygen, Biological oxygen demand (BOD), Chemical oxygen demand ( COD), Electrical conductivity (EC), Total Hardness, Total dissolved solids (TDS), chloride, sulphate and nitrate. The result were compared with values prescribed by WHO and other standards for drinking water quality. The pH exceeded the maximum limit of 9.0 recommended in the standards for treated wastewater. BOD exceeded permissible limit of 6 mg/l prescribed by WHO. EC exceeds the limit as per Europian standard. The nitrate levels were within the limits prescribed by all drinking water standards. All other parameters were all well within permissible limits. The water is safe based on most of the chemical parameters, the water may be unsafe due to poor microbial quality. This study was carried out from March 2011 to February 2012.

Hydrological study of Dhangarmola freshwater reservoir from Ajara tahsil of Kolhapur district, Maharashtra (India)

Sachinkumar R. Patil and S. S. Patil

JCBPS; Section D; August 2017 – October, 2017, Vol. 7, No. 4; 805-818

[DOI: 10.24214/jcbps.D.7.4.80518]

  • Abstract

    The present study deals with the hydrological parameters from Dhangarmola freshwater reservoir of Ajara tahsil, Kolhapur district, Maharashtra (India). The investigation was carried out during July 2011 to June 2012 so as to detect physical parameters like air temperature, water temperature, transparency, electric conductivity and pH and chemical parameters like free CO2, alkalinity, total hardness, calcium, magnesium, chlorides, total dissolved solids, dissolved oxygen and biological oxygen demand. The present investigation revealed that all parameters were within the permissible limit for drinking, agricultural and domestic purposes. The study also concludes that reservoir water supports many biological entities as their feeding and breeding ground.

Evaluation of groundwater quality with special emphasis on heavy metal contamination in major areas of Joypurhat district, Bangladesh

Dipok Kumar, H. M. Zakir, M. A. Maleque and H. P. Seal,

JCBPS; Section D; August 2017 – October, 2017, Vol. 7, No. 4; 819-834.

[DOI: 10.24214/jcbps.D.7.4.81934.]

  • Abstract

    An attempt was made to assess the quality of groundwater collected from three Upazila’s of Joypurhat district, Bangladesh. Forty five (45) groundwater samples were collected to evaluate them on the basis of their suitability for drinking and irrigation usage. Major cation chemistry showed their dominance in order of Ca > Mg > Na > K and the study results inferred 29, 35 and 45 groundwater samples as problematic for irrigation due to higher concentration of Ca, Mg and K, respectively. Among the anions, Cl content in groundwater was the highest (4.80 to 29.60 meq L-1) followed by SO4 (1.50 to 18.90 mg L-1). The concentration of Fe, Mn, Cu, Pb and Cr varied from 0.32 to 0.84;trace to 0.14; 0.71 to 0.81; 1.71 to 10.55 and 2.33 to 3.68 mg L-1, respectively while the concentration of Zn was trace. EC and SAR reflected that all groundwater samples were low to high salinity (C1-C3) and low alkalinity (S1) hazards classes. As regards to hardness, 8 groundwater samples were classified as soft and the rest 37 samples were moderately hard in quality. The concentrations of Na, CO3, HCO3, Fe, Mn, Zn, SO4 and PO4 ions were detected below the toxic levels and might not pose threat to soil environment. But Cl content in all groundwater samples was above the recommended limit (4.0 meq L-1) for irrigation and 41 samples also exceeded the permissible limit (250 mg L-1) of drinking water quality. In context of heavy metals, all samples were found unsuitable for irrigation due to higher concentration of Cu, Cr and Pb. Concentrations of Fe, Cr, Pb, Ca and Mg in groundwater samples also exceeded the guideline value of drinking water. The study concluded that the substances which may cause pollution should be avoided through the use of good management practices