Biochar and urban solid refuse ameliorate the inhospitality of acidic mine tailings and foster effective spontaneous plant colonization under semiarid climate
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AuthorPeñalver Alcalá, Antonio; Álvarez Rogel, José; Conesa Alcaraz, Héctor Miguel; González Alcaraz, María Nazaret
Research GroupEdafología Ambiental, Química y Tecnología Agrícola
Knowledge AreaEdafología y Química Agrícola
SponsorsThe present study was supported by the project RESCLICONT (CGL2016-80981-R), funded by the Ministry of Science, Innovation and Universities of Spain through FEDER funds; by the project METOXCLIM (PTDC/CTA-AMB/29557/2017), funded by FEDER, through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI), and by national funds (OE), through FCT/MCTES. Thanks are due to FCT/MCTES for the financial support to CESAM (UIDP/50017/2020+UIDB/50017/2020), through national funds. A. Peñalver-Alcalá was hired by the project RESCLICONT. In addition, he received two mobility fellowships for short stays at the University of Aveiro, one from the Campus Mare Nostrum of the Murcia Region-Spain and the other one from the Internal PhD Mobility Program of the Technical University of Cartagena. M.N. González-Alcaraz holds a Saavedra Fajardo research contract from the Séneca Foundation of the Murcia Region-Spain. The authors thank F.J. Jiménez-Cárceles from Biocyma S.L. for his valuable help with vegetation fieldwork. We also thanks D. Sánchez Bisquert, I. Tunç and P.A. Madrid Sánchez for their valuable help during the laboratory work
Realizado en/conUniversidad Politécnica de Cartagena; University of Aveiro
Bibliographic CitationPeñalver Alcalá, A. [et al.] 2021. Biochar and urban solid refuse ameliorate the inhospitality of acidic mine tailings and foster effective spontaneous plant colonization under semiarid climate. Journal of Environmental Management 292, 112824.
Community-level physiological profile
Phytomanagement is considered a suitable option in line with nature-based solutions to reduce environmental risks associated to metal(loid) mine tailings. We aimed at assessing the effectiveness of biochar from pruning trees combined with compost from urban solid refuse (USR) to ameliorate the conditions of barren acidic (pH ~5.5) metal(loid) mine tailing soils (total concentrations in mg kg-1: As ~220, Cd ~40, Mn ~1800, Pb ~5300 and Zn ~8600) from Mediterranean semiarid areas and promote spontaneous plant colonization. Two months after amendment addition were enough to observe improvements in chemical and physico-chemical tailing soil properties (reduced acidity, salinity and water-soluble metals and increased organic carbon and nutrients content), which resulted in lowered ecotoxicity for the soil invertebrate Enchytraeus crypticus. Recalcitrant organic carbon provided by biochar remained in soil whereas labile organic compounds provided by USR were consumed over time. These improvements ...
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