The invention discloses a heavy
metal biological absorbent, a preparation method of the absorbent and an application in treating
cadmium-containing
wastewater. The heavy
metal biological absorbent mainly consists of
penicillium simplicissimum
bacteria powder after being modified by
rhamnolipid. The method for preparing the biological absorbent comprises the following main steps: culturing
penicillium simplicissimum in a
liquid culture medium, then continuously enlarging and culturing the cultured
penicillium simplicissimum, adding the
rhamnolipid taken as biosurfactants during the process, collecting
fungus balls after the culture, cleaning the
fungus balls with inorganic
salt solution, freezing and
drying the
fungus balls to the constant weight and
grinding the fungus balls into
powder to obtain the heavy
metal biological absorbent. In the application in treating the
cadmium-containing
wastewater, the heavy metal biological absorbent is mainly utilized to remove the
cadmium in the
wastewater, and the method mainly comprises the following steps: adding the heavy metal biological absorbent into the cadmium-containing wastewater, carrying out
oscillatory reaction and completely removing after the
filtration. The heavy metal biological absorbent has good
absorption effect when being used for treating the cadmium-containing wastewater. The method for removing the cadmium contained in the wastewater has the advantages of simple operation conditions, low cost and high efficiency and is easy to implement.