LIANGJunyu,CUIYubo,AIHainan,et al.Enrichment Characteristics of Heavy Metals in Reeds from Sludge Treatment Wetlands during Loading Period[J].China Water & Wastewater,2026,42(5):112-117.
Enrichment Characteristics of Heavy Metals in Reeds from Sludge Treatment Wetlands during Loading Period
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第5期
Page:
112-117
Column:
Date of publication:
2026-03-01
- Keywords:
- sludge treatment wetland; reed; heavy metal; loading period; enrichment characteristics; waste activated sludge
- Abstract:
- In order to study the accumulation and distribution characteristics of heavy metals in reeds from sludge treatment wetlands, experiments were carried out to analyze Cr, Ni, Cu, Zn, As and Pb contents in the reeds and accumulated sludge in three sludge treatment wetlands (STW1, STW2 and STW3). The results showed that the reeds from sludge treatment wetlands had a stronger enrichment capacity for Ni and Zn, and a weaker enrichment capacity for Pb and Cu. Ni, As, Pb and Zn had a stronger ability to be transferred from the roots to the aboveground part of the reeds, and Cr and Cu had a weaker ability to be transferred. As and Pb could be easily transferred to the leaf tissues of the reeds, while Ni and Zn could be transferred to the stem tissues more easily. In reeds, the proportions of Cr, Cu, Pb and As followed the order: root tissue>leaf tissue>stem tissue. Among these, the proportion of As in the root tissue of STW3 was comparable to that in the leaf tissue. For Ni and Zn in reeds, the proportions followed the order: root tissue>stem tissue>leaf tissue. The average content of Cr in reeds in STW3 was 41% lower than that in STW2, and the average contents of Cu and Pb were all slightly lower than STW2, and only the average contents of Zn and Ni was slightly higher than that of STW2. The presence of the vent pipes increased the uptake capacity of heavy metals by the plant, and thus STW2 configured with vent pipes had more potential for removing heavy metals from the sludge.
Last Update:
2026-03-01