Bottom sludge contamination of canals in Ho Chi Minh City high, uneven distribution, different content in different channels, even those of different segments in a channel Some people viewed through data analysis of sludge, containing salary total p, total N and total humus quite high already vôị conclusions can use sludge as fertilizer even just fertilizer for the tree directly mìa mud, vegetable crops. The mud bottom contains much clay glue, glue the humus. Bỏi for high, not all should be when in reaction conditions pH environment will also change, new substances forming tubers should toxins will also change. The concentration of cations in the environment, the more likely the release and adsorption. The adsorption of bottom mud glue KLN cations as well as glue line far from the land of paddy fields occur very rapidly, creating the separate characteristic curve
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