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Biofiltration is a pollution control technique using living material to capture and biologically degrade process pollutants. Common uses include processing waste water, capturing harmfulchemicals or silt from surface, and micro biotic oxidation of contaminants in air.

Body Purification with Economical Aquatic Plants
Purification of Liwahe creek which belonged to a eutrophicwater body was studied by means of soilless cultivation techniques on artificial substratum. In the static purification test, the removal rate of TN and TP with Ipomoea aquatica were 81.32% and 71.34%from May to October, respectively. With Oenanthe javanica , the above removal rate were 82.77% and 94.77% from November to March, respectively. The heavy metal content (Cu, Cd, Pb, Zn) data revealedthat the soilless cultivated economical plants were eatable. The contribution degrees of plant uptake for N and P varied with economical plant iomass productivity and the pattern of vegatation andmanagement in the field.
What is ipomoea aquatic?
Ipomoea aquatica is a semi-aquatic tropical plant grown as a leaf vegetable. It is known in English as Water Spinach, Water Morning Glory, WaterConvolvulus, or by the more ambiguous names "Chinese spinach" and "swamp cabbage". It has many other names in other languages. It is found throughout the tropical and subtropical regions of the world; it isnot known exactly where it originated.
Ipomoea aquatica grows in water or on moist soil. Its stems are 2–3 meters (7–10 ft) or more long, rooting at the nodes, and they are hollow and can float.The leaves vary from typically sagittate (arrow-head-shaped) to lanceolate, 5–15 centimeters (2–6 in) long and 2–8 centimeters (0.8–3 in) broad. The flowers are trumpet-shaped, 3–5 centimeters (1–2 in)diameter, usually white in colour with a mauve centre. The flowers can form seed pods which can be used for planting.
Specification of Purification Agents & Filtration Media Chemicals
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