1064 Table 5 – Resource Recovery Potential from Mining Water Resource Typical Concentration mg L Recovery Efficiency Percent Market Value USD / tone Economic Viability Technology Readiness Level Capital Cost M USD Payback Period Years Market Demand Growth % Annual Lithium 10-500 70-90 15,000 High 8-9 5-25 3-7 15-25 Rare Earth Elements 1-50 60-80 2,00050,000 MediumHigh 6-8 10-50 5-12 8-15 Copper 20-200 85-95 8,000 High 9 2-15 2-5 3-8 Zinc 50-300 80-90 2,500 Medium 8-9 3-20 4-8 2-4 Sulfate 1000-10000 90-95 50 LowMedium 9 1-10 8-15 1-2 Source: Garcia et al., 2023 [19]; market data from London Metal Exchange (2024) 4.3 Nature-Based Solutions There is growing interest in nature-based solutions for mining water management, with implementation increasing by 150% since 2018 [21]. Among the most relevant and effective solutions are the constructed wetlands Constructed which offer sustainable treatment options with proven performance [21], low energy requirements (90-95% reduction compared to conventional treatment) and habitat creation benefits (supporting 20-50 species per hectare). These wetlands have shown to have long-term sustainability. Phytoremediation Plant-based treatment systems are gaining attention, with treatment efficiency of 60-90% for various contaminants [21]. 5. CONCLUSIONS AND RECOMMENDATIONS 5.1 Key Findings ● The industry has undergone a fundamental transformation from reactive, end-of-pipe treatment to initiative-taking, integrated management systems emphasizing prevention, reuse, and resource recovery. This shift is evidenced by the 27 MAR implementations globally [3] and the adoption of circular economy principles by over 40% of major mining companies [11]. ● Digital technologies, including AI, IoT, and digital twins, are revolutionizing water management capabilities, enabling real-time monitoring, predictive analytics, and optimized operations. Implementation has increased from less than 5% in 2010 to over 60% by 2024 [17]. ● Despite technological advances, acid mine drainage, legacy contamination, and water scarcity remain significant challenges requiring long-term, comprehensive solutions. AMD affects 19,300 km of streams globally [12], with treatment costs exceeding $1 billion annually in North America alone. ● The integration of circular economy principles offers substantial opportunities for reducing freshwater consumption (by 40-80%) while creating value from waste streams (generating $2-15 million annually for large operations) [4]. ● Emerging trends point toward convergence of digital technologies, nature-based solutions, and collaborative approaches in comprehensive, sustainable water management systems, with projected adoption rates of 80-90% by 2030 [21].
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