authors: valentina petre, liliana ghita, razvan alexantdrescu, anamaria scarlat, radu ioana...

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AUTHORS: VALENTINA PETRE, LILIANA GHITA, RAZVAN ALEXANTDRESCU, ANAMARIA SCARLAT, RADU IOANA TECHNICAL COLLEGE BUZAU COMENIUS MULTILATERAL PARTNERSHIP LIFE-GIVING WATER INTERDISCIPLINARY APPROACH OF RESEARCH BUZAU RIVER BASIN ECOSYTEM Buzau River Water Quality This project has been funded with support from the European Commission. This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

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AUTHORS: VALENTINA PETRE, LILIANA GHITA, RAZVAN ALEXANTDRESCU, ANAMARIA SCARLAT, RADU IOANA

TECHNICAL COLLEGE BUZAUCOMENIUS MULTILATERAL PARTNERSHIP

LIFE-GIVING WATER

INTERDISCIPLINARY APPROACH OF RESEARCH BUZAU RIVER BASIN

ECOSYTEM Buzau River Water Quality

This project has been funded with support from the European Commission.This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.

 

Buzau River Water Quality

WATER QUALITY

General Physico-chemical elements: Temperature conditions: temperature the oxygen: dissolved oxygen, CBO5, CCO-Cr,

CCO-Mn Status acidification: pH, alkalinity, bicarbonates; Conditions of nutrients: N-NO3, N-NO2, N-NH4,

Ntot, P-PO4, total P; salinity conditions: TDS, conductivity, Ca, Mg, Cl,

hardness, SO4. 

Specific Pollutants: Cu, Zn, Cr, As, xylenes, PCBs (policlorbifenili), toluene, acenaphthene, phenols, detergents, and cyanide.

 

BUZAU RIVER ECOLOGICAL STATUS

Ecological status is an expression of the quality of the structure and functioning of aquatic ecosystems associated with surface waters. For surface water categories, the ecological status assessment is performed on five quality conditions, namely: high, good, moderate, poor and bad with the corresponding color code (blue, green, yellow, orange and red).The assessment of ecological status of surface waters is done using quality elements (biological, physicochemical, morphological).

DETERMINATION OF BUZAU WATER QUALITY 3 water samples were taken

from Buzau river, respectively from the following areas:

PALTINENI- the mountains MAGURA - the hill VADU PASII - the plain

DETERMINATION OF TEMPERATURE

Principle:-reading the thermometer graduated indicators in decimal degrees after the introduction of the water to be tested for 10 minutes.

DETERMINATION OF TEMPERATURE: AIR AND WATER

THE HYDROGEN ION CONCENTRATION (PH OF THE WATER)

It is an essential indicator for the characterization of acidity or alkalinity of water.According to water quality standards, they are considered to be "neutral" when the pH is between 6.5 and 8.5.

DETERMINATION OF WATER PH INDICATOR PAPER MERCK

Principle:Comparing the colour of pH indicator paper in contact with water on the standard scale.

PALTINENI – PH = 7

MAGURA – PH= 7,5

DETERMINATION OF PH WATER WITH PH METER

Principle:The potential difference between a glass, electrode and a reference electrode (calomel - saturated KCl), introduced in the water sample varies linearly with the pH of the sample.

DETERMINATION OF PH WATER WITH PH METER

PALTINENI – PH=7,05MAGURA – PH=7,2VADU PASII – PH=7,21

DETERMINATION OF CONDUCTIVITY

The electrical conductivity of the water is determined and depends on the content of electrolytes and their strength.Determining the electrical conductivity of a water sample based on the property of an aqueous solution to conduct electrical current and consists in measuring electrical resistance of a column of solution

PALTINENI = 331μS MAGURA = 637 μS VADU PASII = 1591 μS  

DETERMINATION OF CONDUCTIVITY

DETERMINATION OF ALKALINITY The alkalinity of water is given by the presence

of bicarbonate, carbonate alkali, alkaline earth (TEROS) and hydroxides.Principle: neutralization of an amount of water sample with a dilute acid in the presence of acid-base indicator. The alkalinity determined in the presence of phenolphthalein (pH = 8.2) is permanent alkalinity and is given by the free bases and alkali metal carbonates.The alkalinity determined in the presence of methyl orange (pH = 4.4) is the total alkalinity and is given by the free bases , carbonates and alkali metal bicarbonates.Reagent titration is a solution HCl 0.1N with a known factor

 

DETERMINATION OF ALKALINITY- PĂLTINENI

Permanent alkalinity– 0Total alkalinity - 2,4 ml HCl 0,1 N/dm3

DETERMINATION OF ALKALINITY– MĂGURA

Permanent alkalinity – 0Total alkalinity - 2,4 ml HCl 0,1 N/dm3

DETERMINATION OF CHLORIDES

Chlorides derived from soil or pollution from animal or human.Principle:Cl- ion present in the water is determined by volumetric methods based on precipitation reactions. Cl- ion is reacted with AgNO3 in a neutral to form insoluble silver chloride. Is used as an indicator of potassium chromate solution. The development of scarlet color for silver chromate, indicates the end point of the titration.

 

DETERMINATION OF CHLORIDESindicator of potassium chromate solution100 ml water sample

DETERMINATION OF CHLORIDES

PALTINENI –CCl = 12,76 mg/l

MAGURA - CCl= 75,16 mg/l

VADU PASII - CCl = 12,76 = 186,48 mg/l

Titration with AgNO3 0,02 moli/l

DETERMINATION OF HARDNESS

Calcium is present in all water element as bicarbonates, sulfates and chlorides. Excess calcium prints brackish water tasteMagnesium is found in water generally in the form of sulphates and high concentration of water prints disagreeable taste and a laxative effect.These two elements TDS.Principle: Ca2+ and Mg2+, form the solution of the complexone III (EDTA), in a basic medium and in the presence of specific indicators stable complexes.

 

DETERMINATION OF CALCIUM50 ml sample water

2 ml NaOH

CALCIUM CARBONIC ACID INDICATOR –TITRATION WITH EDTA 0,01 MOL/L FROM VIOLET COLOR AT BLUE COLOR

PALTINENI –CCa

2+ = 60,31 mg/l

MAGURA – CCa

2+= 59,29 mg/l

VADU PASII – CCa

2+ = 85 mg/l

DETERMINATION OF HARDNESS

50 ml sample water4 ml amoniacal solutionblack eriocrom T indicator

DETERMINATION OF HARDNESS

Titration with EDTA 0,01 mol/l from violet color at blue color

PALTINENI –DT = 9,170G= 163,68 mg/l CaCO3

MAGURA – DT= 13,370G = 238,65 mg/lCaCO3

VADU PASII – DT = 22,270G =397,48 mg/l CaCO3

DETERMINATION OF MAGNEZIUM

PALTINENI – CMg

2+ = 3,19 mg/l

MAGURA – CMg

2+= 22,58 mg/l

VADU PASII – CMg

2+ = 44,93 mg/l

STRAMBUL

NEHOIU

TISAU

BA

RB

AT

ALUNIS

DU

LBA

NS

LAN

ICE

L

BA

SC

ULIT

A

ST

RA

MB

UL

Legenda

stare ecologica foarte buna

stare ecologica buna

stare ecologica moderata

stare ecologica slaba

stare ecologica proasta

Ac. Siriu

Ac. Candesti

high, good, moderate, poor and bad with the corresponding color code (blue, green, yellow, orange and red).

BUZAU RIVER ECOLOGICAL STATUS is high, good and moderate with the corresponding color code (blue, green, yellow)

Thank you for your attentionStudents of XII-th graders from

natural resources and environmental protection profile, coordinated by teachers Magdalena Coman and

Emilia Popa