An integrated process that includes

An integrated process that includes the pyrolysis of FeSO 4 dry impregnated lignin and subsequent steam gasification of the produced biochar has been performed to produce H 2 -rich syngas and magnetic activated carbon. The results show that gasification is more beneficial for hydrogen production than pyrolysis. Increasing the pyrolysis temperature from 550 °C to 800 °C and iron loading from 4% to 8% not only promotes the extension decomposition of lignin but also induces the production of char, which is more effective for gasification. As a result, the syngas yield and H 2 volumetric percentage of both the pyrolysis and steam gasification processes are enhanced. The maximum overall H 2 yield and exergy efficiency for producing H 2 are estimated to be 42.73 molp-lignin and 46.63%, respectively. Magnetic activated carbon materials produced from the proposed integrated process have a good porous property and high saturation magnetization value. Magnetic activated carbon that is produced from the same process that achieves a maximum H 2 yield is obtained and exhibits an approximate 70% total phosphate and 20% ammonia and nitrogen removal efficiency for treating real domestic wastewater.