Kinetics Of Groundwater Nitrate (NO3 -1) In Soil Leachate In Tulkarem City Using Soil Columns

As we know nitrate ions are considered to be global pollutant that pollute water sources which include surface and ground water. This pollution results mainly from nitrogen fertilizers in agricultural areas, wastewaters and animals manure. World Health Organization (WHO) standards of the nitrate ions concentration is put at 45 mg/l, hence any source of water exceeding this value consider as contaminant and put in focus for treatment. The method of vertical columns that are filled with different types of soil taken from TulkaremCity is to study the effects of soil on the groundwater if contaminated water with nitrate leaches through the soil and its relationship with elevation of nitrate in these areas.Three soil samples of different concentrations of nitrate will be collected from near TulkarmMunicipality wells no (1, 3 and 5). These samples will be put in nine vertical plastic tubes (PVC), then these tubes will be divided into three parts designated as zero-short-long-term of concentrations (0 year, 1 years, 25 years) for each soil sample. Three different concentrations of nitrate-contaminated water will be added as time-term of concentrations to nine columns daily. For the columns, blank and short-term of time concentration (1 year), the high concentrations of nitrate ions concentrated in the bottom of the columns while the lower concentration concentrated in the upper of the column. For the columns long-term of time of concentration (25 year) high concentrations of nitrate ions concentrated in the upper of the columns while the lower concentration concentrated in the bottom of the columns. The results indicate that the texture of the soil is sandy to sandy loam and contain high percentage of organic matter ranging from 3.71 % to 4.25 %. It is found that the average concentration of nitrate ions in the content of the soil samples (1, 3 and 5) is equal to 263.3 mg/L, 216.7 mg/L and 799 mg/L respectively. Kinetic studies (Freundlich adsorption isotherm) is applied to study the adsorption of nitrate ions to the soil particles in the wells no. (1, 3 and 5). The results of adsorption study of wells 1, 3, and 5 are found to be 0.611, 0.779 and 0.821 respectively. These results are satisfactory where the optimum time for adsorption of nitrate ions was after 24 hours.