Impact of biochar amendment on antibiotic removal and ARGs accumulation in constructed wetlands for low C/N wastewater treatment

Biochar-Based Strategies for Antibiotics Removal: Mechanisms, Factors, and Application

“…179 The long-term retention of biochar in low C/N ratio wastewater not only captures large amounts of nutrients and organic matter on its heterogeneous surface for microbial growth and metabolism but also successfully enriches functional microorganisms (e.g., Arthrobacter, Ramlibacter, Flavobacterium, and norank_f_JG30-KF-CM45) for sulfamethoxazole removal, which helps alleviate antibiotic toxicity and enhances microbial activity. 179 The membrane system can also be used to retain biochar in wastewater treatment or the polishing stage. Cheng et al 184 found that the addition of 0.5 g/L of biochar derived from pomelo peel into an anaerobic membrane bioreactor enhanced the elimination of sulfadimidine and sulfamethazine in swine wastewater, resulting in removal efficiencies increasing by over 30%.…”

“…Biochar can be attached to various support media (e.g., plastic, gravel, ceramic, sand) and employed in various reactor configurations (e.g., packed bed, rotating contactor, expanded/fluidized bed reactor, biochar electrode/rod, and biochar plate) to ensure prolonged biochar retention in the aqueous phase. , The choice of reactor type and support media is dependent on the specific application and the characteristics of the wastewater or effluent being treated. For example, the fixed bed column utilizing bamboo biochar pretreated with aluminum salt could achieve long-term retention in the aqueous phase, thereby improving the removal performance of antibiotics (e.g., sulfamethoxazole and sulfapyridine) in scaled-up continuous operations .…”

“…Hydrogen bonding interaction, π–π interaction, hydrophobic interaction, and electrostatic interaction were the dominant mechanisms for ciprofloxacin adsorption by nanostructured activated biochar . Constructed wetlands attached with bamboo biochar to stimulate sulfamethoxazole removal from wastewater with a low carbon-to-nitrogen (C/N) ratio was examined by Ajibade et al The constructed wetlands with biochar showed a good sulfamethoxazole removal performance (65.3 ± 14.2%), which was nearly 36.0% higher than that for the control (28.5 ± 8.8%) . The long-term retention of biochar in low C/N ratio wastewater not only captures large amounts of nutrients and organic matter on its heterogeneous surface for microbial growth and metabolism but also successfully enriches functional microorganisms (e.g., Arthrobacter , Ramlibacter , Flavobacterium , and norank_f_JG30-KF-CM45 ) for sulfamethoxazole removal, which helps alleviate antibiotic toxicity and enhances microbial activity …”

Recent Advances in the Effects of Biochar on Constructed Wetlands: Treatment Performance and Microorganisms

“…It also has a good removal effect on phosphorus [26]. Dissolved organic matter (DOM) will be produced in the process of biochar preparation at high temperatures, and the ability of biochar to release DOM is closely related to the efficiency of nitrogen removal [27].…”

Biochar from Lignocellulosic Biomass: The Importance of Physicochemical Characterization and Multi-Criteria Decision Analysis for Its Applications

“…The escalating technology readiness level (TRL) of thermochemical conversion routes has significantly contributed to the increasing interest in biochar, primarily for its remarkable versatility across various applications [5]. The multifaceted potential of biochar in different domains underscores its significance in contemporary studies, and ongoing research continues to unveil more opportunities for its sustainable and effective utilization in various applications (soil amendment [6][7][8], biofuel [9][10][11], adsorbent material [12][13][14] and wastewater treatment [15][16][17]) and as a support for functionalized materials applicable in chemical synthesis.…”