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Effects of 3,6-Dibromocarbazole on Soil Health—Based on Soil Enzymes and the Biolog-ECO Test

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Abstract

Polyhalogenated carbazoles (PHCZs) are a kind of emerging contaminants with doxin-like toxicity, potential bioaccumulation capability, and persistence. Data about the risks of PHCZs on soil ecosystem are scarce to date, although PHCZs have been detected with high concentrations in the soil. The present study performed a preliminary investigation of 3,6-dibromocarbazole (36-DBCZ, a PHCZ with a high detection rate, and concentration in the environment) at concentrations of 0.1, 1.0, 10, and 100 mg/kg on the soil health, based on soil enzyme test and Biolog-ECO assay. Results showed that 36-DBCZ could inhibit the activity and diversity of soil microbes, even at the environment-relevant concentration (0.1 mg/kg). But, the inhibition lasted only about 10 days. As time passed, slight increases in microbe activity and diversity were found in 36-DBCZ-treated groups. We hypothesized that the degradation products of 36-DBCZ provided extra nutrients to the soil microbes, which required further verification. Activities of urease, β-glucosidase, and acid phosphatase were increasingly increased, in contrast to the microbial activity. The present study provides valuable data on the effects of PHCZs on the soil ecosystem, and we suggest that the degradation of PHCZs, as well as their influences on the structure and functions of the soil microbial community, should be investigated in future studies.

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Data Availability

The data that support the findings of this study are not openly available and are available from the corresponding author upon reasonable request.

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Funding

This work was supported by the National Natural Science Foundation of China (grant number 41701279) and the China Postdoctoral Science Foundation (grant number 2017M612308).

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Correspondence to Lusheng Zhu.

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The authors declare no competing interests.

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Du, Z., Zhang, J., Cheng, C. et al. Effects of 3,6-Dibromocarbazole on Soil Health—Based on Soil Enzymes and the Biolog-ECO Test. Water Air Soil Pollut 233, 256 (2022). https://doi.org/10.1007/s11270-022-05736-0

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  • DOI: https://doi.org/10.1007/s11270-022-05736-0

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