Fig. 10

Effect of initial TCE concentration on cycling performance of BiOBr in degrading TCE in the presence of S_IV under simulated sunlight. Conditions: BiOBr dose = 1 g/L, a [TCE]₀ = ~ 0.1 mM, [SO₃²⁻]₀ = 4 mM at t = 0 min, b [TCE]₀ = ~ 0.25 mM, [SO₃²⁻]₀ = 10 mM at t = 0 min, and the amounts of TCE and S_IV injected increased their concentrations by 0.1 mM, and 0.25 mM, respectively