Enhanced sulfamethoxazole degradation in soil by immobilized sulfamethoxazole-degrading microbes on bagasse

Hu, Shengbing; Hu, Huimin; Li, Wenlong; Ke, Yaoyi; Li, Minghua; Zhao, Yuechun

doi:10.1039/c7ra10150c

Cited by 12 publications

(3 citation statements)

References 61 publications

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“…Larcher and Yargeau (2011) reported that the arylamine N-acetyltransferase, which shows high specificity for aromatic amines, is involved in the degradation of SMX in P. aeruginosa and Rhodococcus species. Hu et al (2017) proposed the pathways of SMX degradation by Enterobacter cloacae strain T2. The initial metabolites of SMX biodegradation follow four pathways: methylation, substitution by hydroxyl and double bond oxidation, desulphurization and acetylation.…”

Section: Discussionmentioning

confidence: 99%

Isolation of Bacterial Endophytes from Phalaris arundinacea and their Potential in Diclofenac and Sulfamethoxazole Degradation

Węgrzyn

Felis

2018

Polish Journal of Microbiology

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A b s t r a c t Diclofenac (DCF), a non-steroidal anti-inflammatory drug (NSAID) and sulfamethoxazole (SMX), an antimicrobial agent, are in common use and can be often detected in the environment. The constructed wetland systems (CWs) are one of the technologies to remove them from the aquatic environment. The final effect of the treatment processes depends on many factors, including the interaction between plants and the plant-associated microorganisms present in the system. Bacteria living inside the plant as endophytes are exposed to secondary metabolites in the tissues. Therefore, they can possess the potential to degrade aromatic structures, including residues of pharmaceuticals. The endophytic strain MG7 identified as Microbacterium sp., obtained from root tissues of Phalaris arundinacea exposed to DCF and SMX was tested for the ability to remove 2 mg/l of SMX and DCF in monosubstrate cultures and in the presence of phenol as an additional carbon source. The MG7 strain was able to remove approximately 15% of DCF and 9% of SMX after 20 days of monosubstrate culture. However, a decrease in the optical density of the MG7 strain cultures was observed, caused by an insufficient carbon source for bacterial growth and proliferation. The adsorption of pharmaceuticals onto autoclaved cells was negligible, which confirmed that the tested strain was directly involved in the removal of DCF and SMX. In the presence of phenol as the additional carbon source, the MG7 strain was able to remove approximately 35% of DCF and 61% of SMX, while an increase in the optical density of the cultures was noted. The higher removal efficiency can be explained by adaptive mechanisms in microorganisms exposed to phenol (i.e. changes in the composition of membrane lipids) and by a co-metabolic mechanism, where non-growth substrates can be transformed by non-specific enzymes. The presence of both DCF and SMX and the influence of the supply frequency of CWs with the contaminated wastewater on the diversity of whole endophytic bacterial communities were demonstrated. The results of this study suggest the capability of the MG7 strain to degrade DCF and SMX. This finding deserves further investigations to improve wastewater treatment in CWs with the possible use of pharmaceuticals-degrading endophytes.K e y w o r d s: endophytic bacteria, constructed wetlands, diclofenac, sulfamethoxazole, biodegradation Węgrzyn A. and Felis E.

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Section: Discussionmentioning

confidence: 99%

Isolation of Bacterial Endophytes from Phalaris arundinacea and their Potential in Diclofenac and Sulfamethoxazole Degradation

Węgrzyn

Felis

2018

Polish Journal of Microbiology

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“…This further confirms that the presence of a biofilm had a positive effect on SMX removal, especially considering that byproducts deriving from SMX partial biodegradation could have a higher hydrophobicity and therefore, higher affinity for the biofilm. Reis et al listed over 10 main byproducts of SMX deriving from bacterial degradation in both aerobic and anaerobic conditions, while Hu et al analyzed over 20 SMX metabolites in a degradation study carried out with two bacterial strains isolated from pig slurry [36,42]. For example, 4-Nitrophenol, 4-Nitro-sulfamethoxazole, Acetanilide, Phenylacetic acid and Benzoic acid (SMX metabolites) have log K ow values of 1.91, 1.22, 1.16, 1.41 and 1.87 respectively.…”

Section: Fate Of Radiolabeled Smxmentioning

confidence: 99%

Investigation of biologically active zeolite: Role of colonization in the removal of 14C-labelled sulfamethoxazole in wastewater

Cuomo,

König,

Zanardini

et al. 2024

Journal of Water Process Engineering

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“…40,41 Compared with other biomass carrier materials, sugarcane bagasse has some advantages: (1) reduction of the mass transfer of cells due to its highly porous nature; (2) suitability for gas evolution during cell growth; (3) it is nontoxic; (4) it is easily available; (5) provides carbon and energy for cell growth. [41][42][43] In this research, some potential bio-carrier materials were investigated for determining an optimal carrier (peanut shell and straw). Finally, sugarcane bagasse was employed as a matrix for cell immobilization to degrade SD on the basis of the cell immobilization status.…”

Section: Introductionmentioning

confidence: 99%

Enhanced sulfamethoxazole degradation in soil by immobilized sulfamethoxazole-degrading microbes on bagasse

Abstract: The presence of sulfamethoxazole (SMX) in the environment is becoming a serious problem because of its toxicity and high risk to human health and microbial activity.

Cited by 12 publications

References 61 publications

Isolation of Bacterial Endophytes from Phalaris arundinacea and their Potential in Diclofenac and Sulfamethoxazole Degradation

Isolation of Bacterial Endophytes from Phalaris arundinacea and their Potential in Diclofenac and Sulfamethoxazole Degradation

Investigation of biologically active zeolite: Role of colonization in the removal of 14C-labelled sulfamethoxazole in wastewater

Investigating the biodegradation of sulfadiazine in soil using Enterobacter cloacae T2 immobilized on bagasse

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