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. 2020 Mar 20;6(3):e03533. doi: 10.1016/j.heliyon.2020.e03533

Figure 2.

Figure 2

Struvite crystallization at 40 °C with and without maleic acid; (a) pH reduction profile; (b) fit of first order kinetic without maleic acid. C = [Mg2+] at time t; Ceq = [Mg2+] at equilibrium, i.e. when the crystallization was completed.