Effect of hydroxypropyl-β-cyclodextrin on the cometabolism of phenol and phenanthrene by a novel Chryseobacterium sp. (February 2019)

• Record Type: Journal Article
• Authors: Xiao, Meng; Yin, Xiangyang; Gai, Hengjun; Ma, Honglei; Qi, Yanfeng; Li, Kun; Hua, Xia; Sun, Meng; Song, Hongbing
• Is Part Of: Bioresource technology. Volume 273(2019)
• Page Start: 56
• Page End: 62
• Publication Date: 2019-02
• Subjects: Chryseobacterium -- Phenol -- Phenanthrene -- Hydroxypropyl-β-cyclodextrin -- Cometabolism; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.10.087
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: First report on the cometabolism of phenol and phenanthrene by Chryseobacterium sp. Phenanthrene degradation through phthalic acid and salicylate pathway simultaneously. Hydroxypropyl-β-cyclodextrin reduced the toxicity of phenanthrene in aqueous phase. Cometabolic degradation was enhanced by adding hydroxypropyl-β-cyclodextrin. Abstract: Cometabolic degradation is an effective method to remove the polycyclic aromatic hydrocarbons (PAHs) with phenol as growth substrate from coal chemical wastewater (CCW). Unfortunately, the toxicity and low solubility of PAHs always restrict their degradation. In this study, Chryseobacterium sp. H202 was firstly isolated from the aerobic segment of CCW. Then, to improve the cometabolic degradation of PAHs, the effects of hydroxypropyl-β-cyclodextrin (HPCD) were investigated. Phenanthrene removal was accelerated in the presence of phenol; however, the degradation of phenol was inhibited because of the toxicity of phenanthrene. Addition of 50 mg/L HPCD accelerated the degradation of phenol and effectively improved the phenanthrene removal rate by about 55%. Inclusion of HPCD appeared to increase the apparent solubility and reduce the toxicity of phenanthrene, thereby improving the cometabolic degradation of phenol and phenanthrene. Therefore, HPCD can enhance the degradation of phenanthrene with phenol as the growth substrate during CCW treatment.