This experiment conducted in the four different ecosystems was to study theabsorption of organic matters in the water, accumulation of chlorine pesticidesby various aquatic vascular plants. Experimental tesults have shown that thefloating plants including water hyacinth and water lettuce have the highestabsorption rate of those wasted substances, moreover, such plants have thestrongest adaptability and easily available. Therefore, they are taken as thesuitable species used for water purification in the ecos...
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