Removal of perchlorate by a lab-scale constructed wetland using achira (Canna indica L.)

Achira (Canna indica L.) has not yet been tested for its potential in removing perchlorate (ClO4−) from wastewater. In this study, constructed wetlands with and without achira were used to investigate the removal efficiency mechanism of perchlorate. The results showed that more ClO4− was removed by relative those without. Perchlorate decreased time, whereas stably removed. terms content, tissues descending order of: leaf > aerial stem flower or rhizome root. concentrated leaves (more than 55.8%) rather root (less 0.67%). Mass balance calculation plant uptake accounted 5.81–7.34% initial input, while microbial degradation 29.39–62.48%. favorable soil microorganism growth proliferation turn biodegradation. Furthermore, effluent pH increased wetland columns promoting removal. indicating promote improving rhizosphere environment.