This article details an effort to lower the levels of total nitrogen in domestic wastewater by using biochar and activated biochar as a sorbent. Date palm fibers were used to prepare two varieties of bio-adsorbates using different temperatures and compositions. The first biochar was chemically activated to form chemical activated carbon. The second type was prepared by slow pyrolysis. An arrangement of four-column reactors was made. Chemically activated biochar makes up the entire first-column reactor. Sand and chemically activated biochar make up the second-column reactor (25% of the volume is activated biochar). Pyrolysis Biochar is the sole material used to fill the third-column reactor. Sand and pyrolysis biochar make up the fourth-column reactor (25% of the volume is pyrolysis biochar). All kinds of treatments were used to treat the influence in a static environment. A higher sorption removal efficiency for nitrogen resulted from chemically activated carbon (65–81 %) then from pyrolysis biochar (60–80%) then from chemically activated carbon with sand (54-76%) and finally from biochar with sand (53–75 %). Improving sorption effects likely depends on altering or activating biochar's surface chemistry during modification. Adding sand to pyrolysis biochar and the activated carbon decreased the cost but pure media showed better removal for nitrogen.