Abstract
This paper analyzes the existing treatment methods of heavy metal Pb and Cd pollution, and obtains the advantages and researchable value of phytoremediation technology. The research value of the short-lived flower crop Calendula officinalis in the adsorption of heavy metal Pb and Cd compound pollution. The research value of the short-lived flower crop Calendula officinalis in the adsorption of heavy metal Pb and Cd compound pollution. The research value of the short-lived flower crop Calendula officinalis in the adsorption of heavy metal Pb and Cd compound pollution. short term crop calendula flowers in the adsorption of heavy metals Pb, Cd research value complex pollution. short term crop calendula flowers in the adsorption of heavy metals Pb, Cd research value complex pollution
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