Anwuli, U. OsadebDavis, IbisoDavis, Ibiso WOgugbue, Chimezie JGideon C, Okpokwasili2023-05-312023-05-312022-09-01Anwuli U. Osadebe1,2*, Ibiso W. Davis1, Chimezie J. Ogugbue1,Gideon C. Okpokwasili,BIOCHAR-MEDIATED REMEDIATION IMPACTS ON NITROGEN CYCLING BACTERIA AND AMMONIA MONOOXYGENASE ACTIVITY IN CRUDE OIL POLLUTED SOIL,PIG BASED WATER QUALITY ASSESSMENT IN EL-HAI RIVER BASIN, EL-KANTARA PLAIN, ALGERIA . Journal of Fundamental and sciences. vol.14, n3. SEP 2022. Faculty of exact sciences. university of el oued. [visited in 22/04/2022]. available from [anwuli.osadebe@gmail.com]http://dspace.univ-eloued.dz/handle/123456789/25218ARTICLEThisstudy adopted an ecosystem services approach to pollution management by investigating the impact of biochar-mediated remediation on soil nitrogen, abundance of nitrogen cycling bacteria and the activity of ammonia monooxygenase (AMO) enzyme in petroleum-polluted soil using two biochar types applied at two treatment levels with monitoring over 15 weeks. The corn cob-derived biochar (CDB), generally, had a stronger restorative effect on soil ammonium nitrogen,nitrate and total organic nitrogenconcentrations than the bone-derived biochar (BDB). Both biochar types had a more robust impact on restoration of Nitrosomonas, Nitrobacterand Azotobacterabundance (with the re-establishment of pre-pollution levels) than on Rhizobiumand Pseudomonas aeruginosa. Biochar amendment restored the activity of AMO enzyme in the soil by week 15. The CDB (72.4% –73.7%) showed more effective total petroleum hydrocarbon (TPH) elimination capacity than the BDB (51.1% –57.7%).Biochar amendments exhibited great potential for restoration of nitrogen cycling while facilitating remediation of petroleum-polluted soils.enAmmonia monooxygenase; Biochar; Ecosystem services approach; Nitrogen cycle; Petroleum; RemediationArticle