Fig. 4From: Growth promotion of Spirulina by steelmaking slag: application of solubility diagram to understand its mechanismSolubility diagram of each element applied for Arthrospira platensis culture. Solubility diagram of a Ca, b Mg, and c Fe for (●) Control, (▲) 0.05 g/L SMS, (□) 0.5 g/L SMS, (○) 5 g/L SMSBack to article page