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Title

EVALUATION OF HEAVY METAL POLLUTION IN GROUND WATER IN A AGRICULTURAL PERIOD IN ASALEM, GILAN, IRAN

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Abstract

 INTRODUCTION: CADMIUM, LEAD AND OTHER HEAVY METALS CAN PASS THROUGH THE SOIL AND CONTAMINATE GROUND WATER [1]. GROUND WATER PROVIDES DRINKING WATER FOR MANY RURAL COMMUNITIES AND SOME CITIES IN THE NORTH OF IRAN. THERE ARE VERY FEW PUBLISHED STUDIES EVALUATING THE HEAVY METALS CONTENTS IN THE VARIOUS PROVINCE AND CITIES. DANGEROUS CONTENTS OF CADMIUM AND LEAD COULD BEEN FOUND IN RECENT YEARS IN GILAN AGRICULTURAL PRODUCTS DUE TO CONTAMINATED SOURCE TAPPED TO ADDRESS POPULATION AND OVER FERTILIZATION WITH CHEMICAL FERTILIZERS AND HIGH RAIN FALLING [2].MATERIAL & METHODS: A DESCRIPTIVE – ANALYTICAL AND CROSS-SECTIONAL STUDY WAS CONDUCTED FOR DETERMINATION OF LEAD AND CADMIUM IN 90 SAMPLES OF GROUND WATER OF 9 DIFFERENT SITES IN ASALEMIN THE NORTH OF IRAN IN THREE CONSEQUENT MONTHS IN WINTER AND SPRING OF 2013, ACCORDING TO STANDARD METHOD WERE STUDIED BY SPECTROSCOPY METHOD IN RESEARCH LABORATORY PHARMACEUTICAL SCIENCES BRANCH, ISLAMIC AZAD UNIVERSITY, TEHRAN. THE RESULTS WERE COMPARED TO IRANIAN STANDARDS AND WORLD HEALTH ORGANIZATION (WHO)[3].RESULTS: LEAD WAS PRESENT IN DETECTABLE AMOUNTS IN ALL SAMPLES WHILE CADMIUM CONTENT IN ALL SAMPLES WAS LOWER THAN PERMISSIBLE LEVELS. THE AMOUNT OF LEAD IN THE GROUND WATER SAMPLES WAS SIGNIFICANT IN THE DIFFERENT SEASONS (P<0.03).CONCLUSION: ALL OF THE EXAMINED GROUND WATER COLLECTED IN ASALEM, IN PRESENT STUDY IS POLLUTED AND LEAD CONCENTRATIONS ARE HIGHER THAN WHO GUIDELINES, EPA STANDARDS AND IRANIAN DRINKING WATER STANDARDS (NO. 6694) AND PROBABLY HAVE PUBLIC HEALTH PROBLEM BY THEIR CONSUMPTION AND CONSTANTLY DETERMINATION OF HEAVY METALS SHOULD BE MEASURED BY RESPONSIBLE ORGANIZATIONS.

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