چكيده به لاتين
In the present study, modified date tree fibers have been used as a biological adsorbent to remove nitrate from water. Nitrate is one of the pollutants that must be removed from water to prevent damage to the living organisms. Due to the fact that the correction of the adsorbent surface by metals and metal oxides can significantly increase the adsorption capacity of the adsorbent, nano-adsorbent production using hard and porous fibers of date palm, which iscorrected by MgCl2.6H2O, It can be used as an ion exchange biological adsorbent to remove nitrate, which, by forming MgO layers on cellulose and hemicellulose as components of date tree fibers, can lead to the removal of nitrate and even other oxanion in water. The formation of MgO particles with a thickness of 17.34 nm can increase the level of adsorbent contact with water pollutants. The pH control is an influential factor in increasing adsorption, which is obtained at pH 5. The adsorption capacity 55.30 mg.g-1 of is MgO-DTF adsorbent with a removal efficiency of about 90%, indicating a high ability to remove nano-adsorbent. Also, a decrease of 0.05 mg.g-1 in the adsorption capacity of nano-adsorbent and 0.09% efficiency of nitrate removal indicates the regeneration, reproducibility and high resistance of nano-adsorbent formed after four stages of adsorption and desorption of pollutants. Therefore, the nano-adsorbent obtained from carbon fiber of date tree fiber modified with magnesium chloride (MgO-DTF) as a cheap bio-adsorbent will have the potential to significantly purify contaminated water.