عنوان مقاله [English]
In this study, the ability of biochar and compost in reduce water salinity and the elements sodium, potassium, calcium, magnesium, sulfate and chlorine were investigated. Experimental treatments include soil column, biochar, compost, compost + biochar composition, soil composition + compost + biochar. Water samples from Gorganrood River were sampled in three study stations according to the conditions of the basin and the amount of EC, total hardness, calcium, magnesium, sodium, potassium, chlorine and sulfate were measured.
According to the obtained results, the salinity and water pollution of Gorganrood River was at its lowest level from November to June. From July to October, due to reduced rainfall, high river water abstraction, the entry of drainage from agricultural lands, as well as sewage in cities located along the river, pollution has increased. First, each of the adsorbents was poured in three replications in 30 cm high tubes and the end of the tubes was covered with filter paper.
The results of variance analysis showed that the effects of adsorbents were significant in reducing salinity and the studied parameters. In station 2, the combined adsorbent of soil + biochar + compost with 82.17% efficiency and in station 3, biochar adsorbent column with efficiency of 61.98% had the greatest effect on reducing water salinity.