Do mycorrhizal symbiosis affect wastewater purification in constructed wetlands with different substrates?. (April 2023)

• Record Type: Journal Article
• Authors: Hu, Bo; Hu, Shanshan; Vymazal, Jan; Chen, Zhongbing
• Is Part Of: Journal of water process engineering. Volume 52(2023)
• Publication Date: 2023-04
• Subjects: Constructed wetlands -- PPCPs -- Treatment performance -- Arbuscular mycorrhizal fungi -- Wastewater; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2023.103498
• Languages: English
• ISSNs: 2214-7144

Abstract

Abstract: Arbuscular mycorrhizal fungi (AMF) can play important roles in pollutant removal in the terrestrial system. However, the functional role of AMF in wetland systems is still unclear. This study evaluated the effects of AMF on the purification of the pharmaceuticals and personal care products (PPCPs) containing wastewater in constructed wetlands (CWs) filled with different substrate types (sand, perlite, vermiculite or biochar). Results indicated that the removal efficiencies of total organic carbon (TOC), phosphate (PO4 3− -P), and total nitrogen (TN) in CWs with different substrates were in the following order: biochar > vermiculite > perlite > sand. Compared with sand systems, the removal efficiencies of TOC, PO4 3− -P, ammonium (NH4 + -N), and TN in CWs filled with adsorptive substrates (biochar, vermiculite, or perlite) were enhanced by 3.8–11.4 %, 11.6–30.6 %, 16.5–31.2 %, and 6.2–34.6 %, respectively. AM symbiosis increased TOC, TN, and PO4 3− -P removal in CWs but the adsorptive substrates showed more significant influences on wastewater purification than AMF symbiosis. Besides, plant ( Glyceria maxima ) presence also improved the performance of CWs on wastewater purification. Overall, all the findings indicated that the interaction effects of AM symbiosis and adsorptive substrates (e.g., biochar, vermiculite, or perlite) could enhance the removal performance of pollutants from wastewater in planted CWs. Graphical abstract: Unlabelled Image Highlights: Planted CWs had better pollution removal performance than unplanted CWs. Adsorptive substrate enhanced pollutant removal in CWs. AM symbiosis had positive effects on pollutant removal in CWs.