title: Can biochar and phytoextractors be jointly used for cadmium remediation?
abstract: Phytoremediation of soils contaminated with cadmium was tested after liming (CaO) or biochar addition, using red amaranth (Amaranthus tricolor L.) as test plant species. Two biochars with contrasting characteristics were prepared from two feedstocks and added to the soil at a rate of 3% (w:w): Eucalyptus pyrolysed at 600°C (EB) and poultry litter at 400°C (PLB). Liming was carried out in two treatments (CaO1) and (CaO2) to the same pH as the treatments EB and PLB respectively. Total plant mass increased in soils amended with PLB and with a mixture of PLB and EB; however this was not sufficient to increase the efficiency of phytoextraction. Bioavailable and mobile fractions of Cd diminished after liming or biochar addition. Our study infers that, both the amount of Cd immobilized and the main mechanism responsible for this immobilization varies according to biochar properties.
authors.affiliation: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Huanping
authors.initials: H
authors.lastname: Lu
authors.affiliation: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
authors.forename: Zhian
authors.initials: Z
authors.lastname: Li
authors.affiliation: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
authors.forename: Shenglei
authors.initials: S
authors.lastname: Fu
authors.affiliation: Departamento de Ingeniería de Materiales, Universidad Politécnica de Madrid, Madrid, Spain.
authors.forename: Ana
authors.initials: A
authors.lastname: Méndez
authors.affiliation: Departamento de Edafología, Universidad Politécnica de Madrid, Madrid, Spain.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Gascó
authors.affiliation: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; Departamento de Edafología, Universidad Politécnica de Madrid, Madrid, Spain.
authors.forename: Jorge
authors.initials: J
authors.lastname: Paz-Ferreiro
mesh_terms: D000327:Adsorption; D027721:Amaranthus / Q000254:growth & development / Q000378:metabolism*; D000818:Animals; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D017610:Calcium Compounds / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry*; D005052:Eucalyptus / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000032:analysis; D010087:Oxides / Q000737:chemistry; D011200:Poultry; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D013696:Temperature
chemical_list: D017610:Calcium Compounds; D008372:Manure; D010087:Oxides; D012987:Soil; D012989:Soil Pollutants; C540010:biochar; D002104:Cadmium; D002606:Charcoal; C016538:lime
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