Agromining: farming for metals in the future?

Phytomining technology employs hyperaccumulator plants to take up metal in harvestable plant biomass. Harvesting, drying and incineration of the biomass generates a high-grade bio-ore. We propose that "agromining" (a variant of phytomining) could provide local communities with an alternative type of agriculture on degraded lands; farming not for food crops, but for metals such as nickel (Ni). However, two decades after its inception and numerous successful experiments, commercial phytomining has not yet become a reality. To build the case for the minerals industry, a large-scale demonstration is needed to identify operational risks and provide "real-life" evidence for profitability.

[1]  Tanguy Jaffré,et al.  Accumulation du nickel par une Rubiacée de Nouvelle-Calédonie, Psychotria douarrei (G. Beauvisage) Däniker , 1974 .

[2]  J. Morel,et al.  Assessment and control of the bioavailability of nickel in soils , 2006, Environmental toxicology and chemistry.

[3]  S. Thomine,et al.  The metal hyperaccumulators from New Caledonia can broaden our understanding of nickel accumulation in plants , 2013, Front. Plant Sci..

[4]  A. Tjoa,et al.  Ultramafic nickel laterites in Indonesia (Sulawesi, Halmahera): mining, nickel hyperaccumulators and opportunities for phytomining , 2013 .

[5]  A. Baker,et al.  Nickel Hyperaccumulation in the Serpentine Flora of Cuba , 1999 .

[6]  B. Dilkes,et al.  Elemental Profiles Reflect Plant Adaptations to the Environment , 2012, Science.

[7]  N. Rajakaruna,et al.  The physiology, functional genomics, and applied ecology of heavy metal-tolerant Brassicaceae , 2013 .

[8]  Christian Ludwig,et al.  Thermal treatment of metal-enriched biomass produced from heavy metal phytoextraction. , 2005, Environmental science & technology.

[9]  Tetsuya Watanabe,et al.  Direct reduction of garnierite ore for production of ferro-nickel with a rotary kiln at Nippon Yakin Kogyo Co., Ltd., Oheyama Works , 1987 .

[10]  Claude Grison,et al.  Leaf-age and soil-plant relationships: key factors for reporting trace-elements hyperaccumulation by plants and design applications , 2015, Environmental Science and Pollution Research.

[11]  Rufus L. Chaney,et al.  Plant uptake of inorganic waste constituents , 1983 .

[12]  C. Grison,et al.  Lewis acid catalysis and Green oxidations: sequential tandem oxidation processes induced by Mn-hyperaccumulating plants , 2015, Environmental Science and Pollution Research.

[13]  C. Grison,et al.  Zinc hyperaccumulating plants as renewable resources for the chlorination process of alcohols , 2012 .

[14]  J. Rabier,et al.  Metal accumulating plants: Medium's role , 2003 .

[15]  X. Miao,et al.  The Challenges of Reusing Mining and Mineral-Processing Wastes , 2012, Science.

[16]  R. Chaney,et al.  Development of a technology for commercial phytoextraction of nickel: economic and technical considerations , 2003, Plant and Soil.

[17]  R. Chaney,et al.  Correcting Micronutrient Deficiency Using Metal Hyperaccumulators: Alyssum Biomass as a Natural Product for Nickel Deficiency Correction , 2006 .

[18]  J. Morel,et al.  Pedogenesis and nickel biogeochemistry in a typical Albanian ultramafic toposequence , 2014, Environmental Monitoring and Assessment.

[19]  Gavin M. Mudd,et al.  Historical Trends in Base Metal Mining: Backcasting to Understand the Sustainability of Mining , 2009 .

[20]  Claude Grison,et al.  Phytoextraction from mine spoils: insights from New Caledonia , 2015, Environmental Science and Pollution Research.

[21]  R. Reeves.  Tropical hyperaccumulators of metals and their potential for phytoextraction , 2003, Plant and Soil.

[22]  V. Sahajwalla,et al.  Production of nickel bio‐ore from hyperaccumulator plant biomass: Applications in phytomining , 2004, Biotechnology and bioengineering.

[23]  F. Agblevor,et al.  Pyrolysis as a technique for separating heavy metals from hyperaccumulators. Part II: Lab-scale pyrolysis of synthetic hyperaccumulator biomass , 2003 .

[24]  Anne Oxley,et al.  Hydro–pyro integration in the processing of nickel laterites , 2013 .

[25]  J. Morel,et al.  Improving the Agronomy of Alyssum murale for Extensive Phytomining: A Five-Year Field Study , 2015, International journal of phytoremediation.

[26]  T. Jaffré,et al.  Sebertia acuminata: A Hyperaccumulator of Nickel from New Caledonia , 1976, Science.

[27]  J. Morel,et al.  A new method for obtaining nickel metal from the hyperaccumulator plant Alyssum murale , 2011 .

[28]  J. Morel,et al.  A new process for nickel ammonium disulfate production from ash of the hyperaccumulating plant Alyssum murale. , 2012, The Science of the total environment.

[29]  R. Reeves,et al.  The Nickel Hyperaccumulating Plants of the Serpentines of Turkey and Adjacent Areas: A Review with New Data , 2008 .

[30]  J. Morel,et al.  Selection and Combustion of Ni-Hyperaccumulators for the Phytomining Process , 2014, International journal of phytoremediation.

[31]  Rufus L. Chaney,et al.  Phytoextraction of Nickel and Cobalt by Hyperaccumulator Alyssum Species Grown on Nickel-Contaminated Soils , 2003 .

[32]  B. Robinson,et al.  Berkheya coddii for phytoremediation and phytomining , 2003 .

[33]  D. Sparks,et al.  Improved understanding of hyperaccumulation yields commercial phytoextraction and phytomining technologies. , 2007, Journal of environmental quality.

[34]  J. Vaughan,et al.  Selective precipitation of mixed nickel–cobalt hydroxide , 2011 .

[35]  R. A. Bergman.  Nickel production from low-iron laterite ores: Process descriptions , 2003 .

[36]  G. Bañuelos,et al.  Selenium biofortification of broccoli and carrots grown in soil amended with Se-enriched hyperaccumulator Stanleya pinnata. , 2015, Food chemistry.

[37]  M. Caron.  Fundamental and practical factors in ammonia leaching of nickel and cobalt ores , 1950 .

[38]  P. Erskine,et al.  Ecology of nickel hyperaccumulator plants from ultramafic soils in Sabah (Malaysia) , 2015, Chemoecology.

[39]  A. Chiarucci,et al.  The nickel hyperaccumulator plant Alyssum bertolonii as a potential agent for phytoremediation and phytomining of nickel , 1997 .

[40]  C. S. Simons,et al.  Acid Leaching Moa Bay’s Nickel , 1960 .

[41]  T. Jaffré,et al.  The chemical exploitation of nickel phytoextraction: an environmental, ecologic and economic opportunity for New Caledonia. , 2012, Chemosphere.

[42]  K. Hattori,et al.  Serpentinites: Essential Roles in Geodynamics, Arc Volcanism, Sustainable Development, and the Origin of Life , 2013 .

[43]  A. J. Pollard,et al.  Hyperaccumulators of metal and metalloid trace elements: Facts and fiction , 2012, Plant and Soil.