Table 1.

Advantages and disadvantages of different physicochemical methods for Mn removal.

Methods	Advantages	Disadvantages
Electrochemical method	Accurate regulation of kinetics; High removal efficiency	High operating costs; Large power supply
Ion exchange method	Non-toxic and renewable; High removal efficiency; Meeting the needs of industrialization	Ion exchange materials being susceptible to organic contamination in wastewater
Adsorption method	Easy access to adsorbents, such as activated carbon, zeolite, etc. Adsorbents being regenerative	Great tendency to cause adsorbent sludge, resulting in secondary pollution
Chemical precipitation method	Simple operation; Low cost; High removal efficiency	Easy to cause secondary pollution; Accumulation of a large amount of sludge