scholarly journals ASSESSMENT OF PHYSICO-CHEMICAL PROPERTIES OF SURFACE WATER OF SHITALAKHYA RIVER NEAR POLASH, NARSINGDI, BANGLADESH.

2016 ◽  
Vol 4 (8) ◽  
pp. 915-924 ◽  
Author(s):  
Md.Abdul Mottalib ◽  
◽  
A.N.M. Al-Razee ◽  
E.U.M. Aman ◽  
Md.Nurul Abser ◽  
...  
Keyword(s):  
Surface Water ◽  
Chemical Properties ◽  
Physico Chemical

Physico-chemical Attributes Study from Different Sources of Freshwater Bodies in and around Barishal University Campus, Barishal, Bangladesh

2021 ◽  
Vol 1 (01) ◽  
pp. 21-26
Author(s):  
AFROJA NASRIN
Keyword(s):  
Surface Water ◽  
Water Temperature ◽  
Chemical Properties ◽  
University Campus ◽  
Surface Water Temperature ◽  
Physico Chemical ◽  
Freshwater Bodies ◽  
Water Ph ◽  
Chemical Attributes ◽  
Different Sources

This study measured surface water temperature, water pH, TDS, EC, DO, nitrate, ammonium, sulphate and DIP as water physico-chemical properties of four freshwater reservoirs from Barishal Sadar upozilla. The surface water temperature was recorded highest (22.4 °C) in station 4 and loest was in station 1. Water pH, nitrate, ammonium and sulphate showed almost same results among the four reservoirs. TDS and EC values range from 188 to 215 mg/l and 195 to 225 µS/cm, respectively. DO level was almost similar in all the stations except station 1 which showed comparatively lowest amount (4.55 mg/l). DIP ranges from 3.20 to 4.15 mg/l. Among the four reservoirs, comparatively newly established BU pond (station 4) showed poor results than the others.

scholarly journals Surface water quality around DEPZ industrial area, Savar, Dhaka

2012 ◽  
Vol 47 (3) ◽  
pp. 279-286
Author(s):  
H Momtaz ◽  
F Alam ◽  
MA Ahsan ◽  
MA Akbor ◽  
MM Rashid
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Point Source ◽  
Chemical Constituents ◽  
Chemical Properties ◽  
Surface Water Quality ◽  
Industrial Area ◽  
Positive Interaction ◽  
Physico Chemical ◽  
Water Quality Deterioration

Some important physico-chemical properties of surface water around DEPZ industrial area, Savar were studied to evaluate the water quality. Seven water samples were collected from major waterbodies of DEPZ industrial area. The value of Physico-chemical parameter such as Temperature (57-24°C), pH (12.45-7.58), EC (12400-2060 ?s/cm), BOD5 (895-63.19 mg/L), TSS (2170-435 mg/L), TDS (6840-1036 mg/L), Turbidity (89.55-32.16 mg/L) and Salinity (7.1-1.0 ppt) were highest in the point source (W1) and began to decline as the waste dispersed through the nearby waterbodies (W2-W7). The result revealed that all the chemical constituents, except a few, were beyond the recommended limit for various uses. The lowest content of DO (0.10 mg/L) and highest content of BOD5 (895 mg/L) in point source waterbody indicate that the industries were releasing large amount of oxygen demanding organic wastes which subsequently affected all the studied waterbody. Among metal content of the study area, the value of Fe (1.331-0.443 mg/L), Zn (0.308-0.134 mg/L), Cu (0.244 0.127 mg/L) and Cr (0.615-0.055 mg/L) were gradually decreased from point source to the remote area. Point source (W1) waterbody had the highest concentration of Cr (0.615 mg/L) which exceeded the safe limit for industrial wastewater. This may be due to various chrome agent used in dyeing purposes. Anionic parameters like F- and PO4 3- were at intolerable limit in some waterbody. The coefficient of correlation analysis among physicochemical properties indicated that all the parameters had significant contribution to pollute the water. The correlation between DO and pH was strongly negative (r=-0.995**). Fe showed positive significant correlation with Zn, Cu and Cr. There was a significant positive interaction of PO4 3- with Cl- and NO3- in case of water quality deterioration. The above findings showed that the surface water around DEPZ industrial area was highly polluted by the industrial activities and was harmful for life. DOI: http://dx.doi.org/10.3329/bjsir.v47i3.13061 Bangladesh J. Sci. Ind. Res. 47(3), 279-286, 2012

scholarly journals Water Pollution along the Mahul Creek of Mumbai, India - Study of Physico-Chemical Properties

2014 ◽  
Vol 16 ◽  
pp. 44-53 ◽  
Author(s):  
Pravin U. Singare ◽  
M.V.A. Ansari ◽  
N.N. Dixit
Keyword(s):  
Surface Water ◽  
Pollution Control ◽  
Chemical Properties ◽  
Total Alkalinity ◽  
Annual Average ◽  
Treatment Techniques ◽  
Creek Water ◽  
Physico Chemical ◽  
Central Pollution Control Board ◽  
One Year

The present study was performed for the period of one year from January 2013 to December 2013 in order to understand the physico-chemical properties of Mahul Creek water. From the results of our study it was observed that the annual average COD level was 362.09 ppm which was far higher than the maximum tolerable level of 250 ppm set for inland surface water as well as for marine coastal water. The annual average conductivity was found to be 6122.81 µS cm-1 which was very much above the conductivity limit for inland surface water of 1000 µS cm-1 set by Central Pollution Control Board (CPCB) for propagation of fisheries. The annual average total alkalinity level was recorded as 166.25 ppm, which according to the UN Department of Technical Cooperation for Development (1985) was found to be strongly alkaline. The annual average hardness level of the creek water was found to be 2488.65 ppm which was above the limit of 300 ppm set by ISI. From the results of the present investigation it seems that the time has come to implement proper effluent water treatment techniques and enforcement of pollution control by the regulatory authority on the indiscriminate discharge of industrial wastewater into water bodies

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

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