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Updated: Jun 16, 2025

Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in PolyS-Divinylbenzene
Published on: May 20, 2019
Sulfur modification enhances promotion of carbon-iron composites on carbon chain elongation
Zhifang Ning1, Di Dou1, Jiale Liu1
1College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; Pollution Prevention Biotechnology Laboratory of Hebei Province, Shijiazhuang 050018, China.
Abstract:
Efficient synthesis of caproate is crucial for the recovery of organic wastes. However, the yield and selectivity of caproate are limited by the efficiency of carbon chain elongation (CCE). This study presents sulfur-modified carbon-iron composites (BC[S-Fe]) as an innovative approach to enhance CCE for efficient caproate biosynthesis. Unlike conventional carbon-iron materials (BC[Fe]), sulfur modification stabilized nano-zero-valent iron (Fe0) against oxidation and amplified redox activity, achieving an 83 % higher caproate yield (6914 mg·L-1) and 58 % carbon conversion efficiency. BC[S-Fe 1/5] (S:Fe = 1:5) outperformed BC, Fe0 and BC[Fe] by enriching electroactive bacteria (e.g., Rummeliibacillus suwonensis, Seramator thermalis, and Rubeoparvulum massiliense) that upregulated electron transfer genes and CCE metabolic genes. Additionally, BC[S-Fe 1/5] enhanced biofilm formation and quorum sensing, fostering microbial synergy to optimize electron flux. This work pioneers the integration of sulfur-modified composites into microbial CCE systems, offering a novel strategy to optimize caproate synthesis through enhanced electron transfer and functional microbiome engineering.
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