Volume No. 13 Issue No.: 04 Page No.: 320-330 April-June 2019

 

EVALUATION OF HEAVYMETAL POLLUTION IN SEA WATER AND SEDIMENTS OF MAHATMA GANDHI BEACH AREA IN KOLLAM COAST, SOUTH INDIA

 

Rohini P. and Jaya D. S.

Department of Environmental Sciences, University of Kerala, Kariavattom campus P.O., Thiruvananthapuram (INDIA)

 

Received on : April 04, 2019

 

ABSTRACT

 

The rapid industrialization and economic development along the coastal environment introduce large amount of pollutants to the beaches. The present study was conducted to assess the extent of pollution in the Mahatma Gandhi Beach area in Kollam coast, South India, with special reference to heavy metals. For the study, six sites (S1 to S6)in the beach (approx. 2km) were selected, that are approximately 200 m apart.The water and sediment sampleswere collected during the months of January and March 2019. Physico-chemical parameters such as pH, temperature,TDS,electricalconductivity, alkalinity, chloride, salinity, hardness, sulphate, nitrate, phosphate, sodium, potassium and heavy metals (Pb,Cd,Cr,Mn,Zn,Cu,Fe) were analyzedin sea water following the standard procedures. In beach sediment samplestexture, bulk density,organic carbon, organic matter content,nitrates, phosphates, sulphates, sodium, potassium and heavy metals were also determined.Thetextural analysis shows that Kollam beach is a sandy beach. The study results indicate that the concentration of chlorides, salinity, sulphates, sodium,heavy metals (Pb, Cd, Cr, Mn, Zn, Cu, Fe) were high in water and sediments. High concentration of leadwas detected in sea water (0.11ppm)and sediments (88.3mg/kg) of the study area.The pollution load index ofheavy metals estimated in beach sediment sample from all sites show significantly high values(PLI>1), and found highest in site 1 in both sampling months.Therefore the study revealed that the Kollam Mahatma Gandhi beach area is polluted and contaminated with toxic heavy metals due to different anthropogenic activities like fishing, industries, and mining.

 

Keywords : Beach, Heavy metals, Pollution load index, Sea water, Sediment

 

 

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