# Application of Biochar for the Restoration of Metal(loid)s Contaminated Soils
## 5 Conclusions
J._**2006**, _70_, 1719-1730. [CrossRef]
* [PERSON] et al. (2015) [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] Characteristics and applications of biochar for environmental remediation: A review. _Crit. Rev. Environ. Sci. Technol._**2015**, _45_, 939-969. [CrossRef]
* [PERSON] et al. (2011) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] Application of biochar on mine tailings: Effects and perspectives for land reclamation. _Chemosphere_**2011**, _83_, 1262-1267. [CrossRef] [PubMed]
* [PERSON] et al. (2016) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Long-term impact of biochar on the immobilisation of nickel (II) and zinc (II) and the revegetation of a contaminated site. _Sci. Total Environ._**2016**, _542_, 771-776. [CrossRef] [PubMed]
* [PERSON] et al. (2016) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; et al. Effect of biochar on the extractability of heavy metals (Cd, Cu, Pb, and Zn) and enzyme activity in soil. _Environ. Sci. Pollut. Res._**2016**, _23_, 974-984. [CrossRef]
* [PERSON] et al. (2021) [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Long-term assessment of remediation treatments applied to an area affected by a mining spill. _Land Degrad. Dev._**2021**, _32_, 2481-2492. [CrossRef]
* [PERSON] et al. (1999) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] Heavy metal pollution of soils affected by the Guadiamar toxic flood. _Sci. Total Environ._**1999**, _242_, 117-129. [CrossRef]* (31) IUSS (International Union of Soil Sciences). Working Group WRB. World Reference Base for Soil Resources. In _International Soil Classification System for Naming Soils and Creating Legends for Soil Maps_; World Soil Resources Reports N 106; FAO: Rome, Italy, 2015. * (32) [PERSON], [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON], [PERSON] Long-term contamination in recovered area affected by a mining spill. _Sci. Total Environ._**2015**, _514_, 219-223. [CrossRef]
* (33) [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Soil pollution by a pyrite mine spill in Spain: Evolution in time. _Environ. Pollut._**2004**, _132_, 395-401. [CrossRef]
* (34) MAPA (Spanish Ministry of Agricultural, Fishing and Food) Ministerio de Agricultura, Pesca y Alimentacion). Official Methods of Analysis. Metodos Ofaciles de Analisis. In _Tomo III. Spanish Ministry of Agricultural, Fishing and Food Secretaria General Tecnica del Ministerio de Agricultura_; Pesca y Alimentacion: Madrid, Spain, 1994; Volume III, p. 195. * (35) [PERSON]; [PERSON]; [PERSON] Trace metal chemistry in arid-zone field soils amended with sewage sludge. I: Fractionation of Ni, Cu, Zn, Cd and Pb in solid phases. _Soil Sci. Soc. Am. J._**1982**, _46_, 260-264. [CrossRef]
* (36) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Certified reference material for the quality control of EDTA-and DTPA-extractable trace metal contents in calcareous soil (CRM 600). _Fresenius J. Anal. Chem._**1998**, _360_, 505-511. [CrossRef]
* (37) U.S. EPA. _Method 3050B: Acid Digestion of Sadiments, Sludges, and Soils_; Revision 2; EPA: Washington, DC, USA, 1996; p. 2. * (38) [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON] Residual pollution and vegetation distribution in amended soils 20 years after a pyrite mine tailings spill (Aznalcollar, Spain). _Sci. Total Environ._**2019**, _650_, 933-940. [CrossRef]
* (39) [PERSON]; [PERSON]; [PERSON] A protocol for data exploration to avoid common statistical problems. _Methods Ecol. Evol._**2010**, \(1\), 3-14. [CrossRef]
* (40) [PERSON]; [PERSON]; [PERSON]; [PERSON] Characteristics of biochar and its application in remediation of contaminated soil. _J. Biosci. Bioeng._**2013**, _116_, 653-659. [CrossRef] [PubMed]
* (41) [PERSON]; [PERSON] The immobilisation and retention of soluble arsenic, cadmium and zinc by biochar. _Environ. Pollut._**2011**, _159_, 474-480.