Fig. 7From: Remediation capabilities of pilot-scale wetlands planted with Typha aungstifolia and Acorus calamus to treat landfill leachateReduction of trace elements after treatment using A. calamus (48 h of HRT; error bars represent standard deviation; Student’s t test, p = 0.049–0.01 and 96 h of HRT; error bars represent standard deviation; Student’s t test p = 0.049–0.01)Back to article page