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Effect of Reactive Black 5 azo dye on soil processes related to C and N cycling
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Journal Article
Effect of Reactive Black 5 azo dye on soil processes related to C and N cycling
2018
Overview
Azo dyes are one of the largest classes of synthetic dyes being used in textile industries. It has been reported that 15–50% of these dyes find their way into wastewater that is often used for irrigation purpose in developing countries. The effect of azo dyes contamination on soil nitrogen (N) has been studied previously. However, how does the azo dye contamination affect soil carbon (C) cycling is unknown. Therefore, we assessed the effect of azo dye contamination (Reactive Black 5, 30 mg kg −1 dry soil), bacteria that decolorize this dye and dye + bacteria in the presence or absence of maize leaf litter on soil respiration, soil inorganic N and microbial biomass. We found that dye contamination did not induce any change in soil respiration, soil microbial biomass or soil inorganic N availability ( P > 0.05). Litter evidently increased soil respiration. Our study concludes that the Reactive Black 5 azo dye (applied in low amount, i.e., 30 mg kg −1 dry soil) contamination did not modify organic matter decomposition, N mineralization and microbial biomass in a silty loam soil.
Publisher
PeerJ. Ltd,PeerJ Inc
Subject
