2021-11-142021-11-142009-10-30Topaç, F. O. vd. (2009). "Effect of a sulfonated azo dye and sulfanilic acid on nitrogen transformation processes in soil". Journal of Hazardous Materials, 170(2-3), 1006-1013.0304-3894https://doi.org/10.1016/j.jhazmat.2009.05.080https://www.sciencedirect.com/science/article/pii/S0304389409008231http://hdl.handle.net/11452/22645Introduction of organic dyes into soil via wastewater and sludge applications has been of increasing concern especially in developing or under-developed countries where appropriate management strategies are scarce. Assessing the response of terrestrial ecosystems to organic dyes and estimating the inhibition concentrations will probably contribute to soil remediation studies in regions affected by the same problem. Hence, an incubation study was conducted in order to investigate the impact of a sulfonated azo dye, Reactive Black 5 (RB5) and sulfanilic acid (SA), a typical representative of aromatic sulfonated amines, on soil nitrogen transformation processes. The results apparently showed that nitrogen related processes in soil can be used as bioindicators of anthropogenic stress caused by organic dyes. It was found that urease activity, arginine ammonification rate, nitrification potential and ammonium oxidising bacteria numbers decreased by 10-20% and 7-28% in the presence of RB5 (>20 mg/kg dry soil) and SA (>8 mg/kg dry soil), respectively. Accordingly, it was concluded that organic dye pollution may restrict the nitrogen-use-efficiency of plants, thus further reducing the productivity of terrestrial ecosystems. Furthermore, the response of soil microbiota to SA suggested that inhibition effects of the organic dye may continue after the possible reduction of the parent dye to associated aromatic amines.eninfo:eu-repo/semantics/closedAccessAmmonificationAzo dyesNitrificationNitrifying bacteriaSoil pollutionPolycyclic aromatic-hydrocarbonsUreaseDegradationRemediationInhibitionAdaptationToxicityBacteriaNitrateEngineeringEnvironmental sciences & ecologyAir pollution controlAminationAminesAmino acidsAmmonium compoundsAromatic compoundsAzo dyesBacteriaBacteriologyDenitrificationNitrogenOxidationSimulated annealingSoil conservationSoilsWastewaterAmmonificationAnthropogenic stressAromatic aminesBacteria numberBio-indicatorsDeveloped countriesDry soilIncubation studyInhibition effectManagement strategiesNitrifying bacteriaNitrogen transformationsOrganic dyeReactive black 5Soil microbiotaSoil nitrogen transformationsSoil remediationSulfanilic acidTerrestrial ecosystemsUrease activityAmmonificationBacteriumBioindicatorDyeEcosystem responseOrganic acidOrganic pollutantReductionSoil ecosystemSoil managementSoil remediationAerobiosisAnalysis of varianceArginineAzo compoundsColoring agentsHydrogen-ion concentrationKineticsMineralsNaphthalenesulfonatesNitritesNitrogenNitrogen fixationOxidation-reductionQuaternary ammonium compoundsSoilSoil microbiologySulfanilic acidsUreaseArticle0002703105000672-s2.0-69049113848100610131702-319524359Engineering, environmentalEnvironmental sciencesSewage Sludge; Miscanthus Giganteus; Festuca RubraArginineAromatic amineAzo dyeNitrogenReactive black 5Sulfanilic acidUnclassified drugUreaseAgroecosystemAmmonificationArticleBacterial countBiotransformationControlled studyEnvironmental impactIndicator organismNitrificationNitrifying bacteriumNitrogen cyclingNitrogen mineralizationNitrogen utilizationNonhumanOrganic pollutionPollution monitoringSoil microfloraSoil pollutionSulfonation