1. concerning the protection of waters against pollution caused by nitrates from agricultural sources;Council of the European Council, European Parliament, European Commission, Council Directive 91/676/EEC of 12;Official Journal. L,1991
2. USEPA Regulated Drinking Water Contaminants: Inorganic Chemicals., (n.d.). https://www.epa.gov/ground-water-and-drinking-water/table-regulated-drinking-water-contaminants.
3. Biological nitrate removal processes from drinking water supply-a review;Mohseni-Bandpi;J Environ Health Sci Engineer.,2013
4. New methods of nitrate removal from water;Shrimali;Environ. Pollut.,2001
5. Wetlands for wastewater treatment and subsequent recycling of treated effluent: a review;Almuktar;Environ. Sci. Pollut. Res.,2018