Vol 3: Retention and mitigation of metals in sediment, soil, water, and plant of a newly constructed root-channel wetland China from slightly polluted source water.Reportar como inadecuado



 Vol 3: Retention and mitigation of metals in sediment, soil, water, and plant of a newly constructed root-channel wetland China from slightly polluted source water.


Vol 3: Retention and mitigation of metals in sediment, soil, water, and plant of a newly constructed root-channel wetland China from slightly polluted source water. - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Descargar gratis o leer online en formato PDF el libro: Vol 3: Retention and mitigation of metals in sediment, soil, water, and plant of a newly constructed root-channel wetland China from slightly polluted source water.
This article is from SpringerPlus, volume 3.AbstractConstructed root-channel wetland CRCW is a term for pre-pond-wetland-post-pond complexes, where the wetland includes plant-bed-ditch landscape and root-channel structure. Source water out of pre-ponds flows through alternate small ditches and plant beds with root-channels via a big ditch under hydraulic regulation. Then source water flows into post-ponds to finish final polishing. This article aims to explore the potential of components of a pilot CRCW in China on mitigating metals in micro-polluted source water during its initial operation stage. We investigated six heavy metals Cd, Cr, Cu, Ni, Zn, and Pb in surface sediment, plant-bed subsurface soil, water, and aquatic plants during 2012–2013. Monitoring results showed that pond-ditch sediments and plant-bed soil retained a significant amount of Cr, Ni, and Zn with 93.1%, 72.4%, and 57.5% samples showing contamination factor above limit 1 respectively. Remarkably the high values of metal enrichment factor EF occurred in root-channel zones. Water monitoring results indicated that Ni, Zn, and Pb were removed by 78.5% 66.7%, 57.6% 59.6%, and 26.0% 7.5% in east west wetland respectively. Mass balance estimation revealed that heavy metal mass in the pond-ditch sediments accounted for 63.30% and that in plant-bed soil 36.67%, while plant uptake occupied only 0.03%. The heavy metal accretion flux in sediments was 0.41 - 211.08 μg · cm-2 · a-1, less than that in plant-bed soil 0.73 - 543.94 μg · cm-2 · a-1. The 1.83 ha wetland has retained about 86.18 kg total heavy metals within 494 days after operation. This pilot case study proves that constructed root-channel wetland can reduce the potential ecological risk of purified raw water and provide a new and effective method for the removal of heavy metals from drinking water sources.Electronic supplementary material: The online version of this article doi:10.1186-2193-1801-3-326 contains supplementary material, which is available to authorized users.



Autor: Wang, Baoling; Wang, Yu; Wang, Weidong

Fuente: https://archive.org/



DESCARGAR PDF




Documentos relacionados