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

Abstract

Achira (Canna indica L.) has not yet been tested for its potential in removing perchlorate (ClO 4 − ) from wastewater. In this study, constructed wetlands with and without achira were used to investigate the removal e ciency and removal mechanism of perchlorate. The results showed that more ClO 4 − was removed by the wetlands with achira relative to those without. Perchlorate removal in the wetlands without achira decreased with time, whereas perchlorate in the wetlands with achira was stably removed. In terms of ClO 4 − content, the achira tissues were in the descending order of: leaf > aerial stem > ower or rhizome > root. Perchlorate was concentrated in leaves (more than 55.8%) rather than in root (less than 0.67%). Mass balance calculation showed that plant uptake accounted for 5.81-7.34% of initial ClO 4 − input, while microbial degradation accounted for 29.39-62.48%. The wetlands with achira were favorable for soil microorganism growth and proliferation and in turn ClO 4 − biodegradation. Furthermore, the e uent pH increased in achira wetland columns and in turn promoting ClO 4 − removal. The results indicating that the wetlands with achira promote ClO 4 − removal by improving the rhizosphere environment. General Colleges and Universities in Guangdong Province (2018 KQNCX147), and Yanling excellent young teacher program of lingnan normal university. Compliance with ethical standardsCon ict of interest All authors claim that they do not have any actual or potential con ict of interest including any nancial, personal, or other relationships with other people or organizations.

Potential of Canna indica in Constructed Wetlands for Wastewater Treatment: A Review

“…Perchlorate was found to be more concentrated in leaves (more than 55.8%) than in roots (less than 0.67%). Plant uptake accounted for 5.81-7.34% of initial perchlorate input, while microbial degradation accounted for 29.39-62.48%, according to a mass balance estimate [120]. The removal of Yellow 2G, a synthetic azo dye from wastewater was investigated at lab-scale in a CW planted with Canna indica.…”

Physical and Thermal Characterization of Achira (Canna edulis Ker) Fiber Obtained from Food Industry Waste in the Department of Cundinamarca, Colombia

“…There are studies that show that achira starch can be used as a filtering agent controller in water-based drilling mud, with better performance than other additives commonly used for this purpose [32]. It is capable of removing contaminants, such as perchlorate, from wastewater [33]. This opens up the possibility of using achira fibers as reinforcement in filtering compounds for the treatment of contaminated wastewater as an alternative to other synthetic materials.…”