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Updated: Sep 10, 2025

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
Published on: August 31, 2017
Organic carbon released from tire chips enhances pyrite particle-based autotrophic denitrification of water
Zhiheng Xia1, Tongtong Zhang1, Ruobing Li1
1Low-carbon Water Environment Technology Research Center, School of Chemistry and Life Resource, Renmin University of China, Beijing, 100872, China.
Abstract:
The incorporation of organic matter may enhance the efficacy of mixed-nutrient denitrification. In this study, we explored the effects of waste tire chips on the autotrophic denitrification of pyrite. The synergy between organic carbon and sulfur in mixed-nutrient denitrification resulted in exceptional efficiency. A high tire chip ratio increases the carbon supply to the mixed nutrient denitrification filter, enhances the relative contribution of heterotrophic denitrification, and improves the overall denitrification performance. After an empty bed reaction time (EBRT) of 5 h, the nitrate removal efficiencies of FeS2:Tire filler ratios of 1:0, 2:1, 1:1, and 1:2 were 29.20 %, 54.83 %, 71.13 %, and 76.44 %, respectively. A tire-derived organic carbon source increases the abundance of microbial communities and stimulates the activity of key enzymes involved in nitrogen and sulfur metabolism.
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