Pilot testing of a bioremediation system for water and soils contaminated with heavy metals: vegetable depuration module

Autor:	Matías Benavidez, Juan Cerioni, Vanesa Analia Silvani, Alicia Margarita Godeas, Adalgisa Scotti, Mauricio Visciglia
Rok vydání:	2019
Předmět:	0106 biological sciences Environmental remediation Plant Science 010501 environmental sciences 01 natural sciences Soil Bioremediation Metals Heavy Vegetables Soil Pollutants Environmental Chemistry Vegetable depuration module 0105 earth and related environmental sciences Pilot testing Chemistry Water Pollution Sunflower Soil contamination Phytoremediation Biodegradation Environmental Heavy metals Bioaccumulation Environmental chemistry Soil water Constructed wetland 010606 plant biology & botany
Zdroj:	International journal of phytoremediation 21 (2019): 899–907. doi:10.1080/15226514.2019.1583634 info:cnr-pdr/source/autori:Scotti A.; Silvani V.A.; Cerioni J.; Visciglia M.; Benavidez M.; Godeas A./titolo:Pilot testing of a bioremediation system for water and soils contaminated with heavy metals: vegetable depuration module/doi:10.1080%2F15226514.2019.1583634/rivista:International journal of phytoremediation/anno:2019/pagina_da:899/pagina_a:907/intervallo_pagine:899–907/volume:21
ISSN:	1549-7879 1522-6514
DOI:	10.1080/15226514.2019.1583634
Popis:	We present a novel constructed wetland called a vegetable depuration module (VDM) as a pilot test of a bioremediation system (BS) for decontaminating water and soil polluted with heavy metals. The VDM consisted of a pool filled with stones of different granulometry and a substrate top layer composed of a mixture of soil and volcanic ash (50:50, v/v) supplemented with 350 ppm Zn. The BS of sunflower plants colonized by the arbuscular mycorrhizal fungus Rhizophagus intraradices was planted in the VDM. Initially, the substrate registered high concentrations of Zn, Cr, Mn, Cu, and Sr, and had Eh > +500 mV and pH 8.4. Irrigation with a Cu solution by vertical flow was carried out. After 3 months, bioaccumulation factors ranged from 1.00 to 8.90, and translocation rates were >1 for Sr and Cu. Total metals extracted by the BS and percolation were 31%, 34%, 50%, 45%, and 57% for Zn, Cu, Mn, Cr, and Sr, respectively. Only the BS was capable of extracting 94% of Cu and 38% of Zn. VDM allowed us to calibrate the extractive performance of the studied elements in BS. This biotechnological development holds great potential for phytoremediation of polluted areas.
Databáze:	OpenAIRE
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