RELATIONSHIP OF PHOTODEGRADATION OF LINDANE ON SURFACE SOILS FROM LIAO HE BASIN WITH TOTAL IRON CONTENTS

摘要

An experimental study has been carried out in order to determine the photodegradation of γ -HCH on surface soils with low amount of organic substance. It can be concluded that photodegradation rate of γ -HCH was fitted for pseudo one-order kinetics. The constants of photodegradation rates increase from 0.0052 μ g/ (kg · h) to 0.0340 μ g/ (kg · h) with the increase of total iron contents between 0.40% and 5.40% in soils. These results show that total iron in soils with low amount of organic substance has remarkable catalysis on photodegradation of γ -HCH.