Decoloration of simulated wastewater containing dye reactive black K-BR by zero-valent iron was investigated. The results showed that decoloration efficiency increased with decreasing pH or initial dye concentration, ...Decoloration of simulated wastewater containing dye reactive black K-BR by zero-valent iron was investigated. The results showed that decoloration efficiency increased with decreasing pH or initial dye concentration, and increased with increasing iron loading. The reaction followed first-order kinetics initially but deviated from first-order behavior with increasing time. Considering the decrease of active surface area of zero-valent iron with time,decoloration kinetics was expressed as ln(c/c 0)=K[1-exp(-k dt)]/k d.It indicated that k d was independent of iron loading and pH, and decreased with increasing initialdye concentration.K was proportional to iron loading,and decreased with increasing pH or initial dye concentration.展开更多
文摘Decoloration of simulated wastewater containing dye reactive black K-BR by zero-valent iron was investigated. The results showed that decoloration efficiency increased with decreasing pH or initial dye concentration, and increased with increasing iron loading. The reaction followed first-order kinetics initially but deviated from first-order behavior with increasing time. Considering the decrease of active surface area of zero-valent iron with time,decoloration kinetics was expressed as ln(c/c 0)=K[1-exp(-k dt)]/k d.It indicated that k d was independent of iron loading and pH, and decreased with increasing initialdye concentration.K was proportional to iron loading,and decreased with increasing pH or initial dye concentration.
