Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: UMLS:C0432222 (
SEM
)
47,337
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
The pollution of sulfonamide antibiotics in aqueous system has attracted an increasing attention, however, interactions between the effective biomaterial and sulfonamide antibiotics are not clear. In this study, adsorption capacity and interaction mechanism of EPS from Klebsiella sp. J1 and sulfonamide antibiotics were investigated. The biosorption efficiency of EPS were 70.0%, 55.1%, 51.8%, and 46.7% for SMX,
SM1
, SM2, and SDZ, respectively. Qualitative and quantitative analysis displayed the almost consistent adsorption mechanism for four sulfonamides on EPS. The adsorption behavior could be described by Langmuir, Freundlich isotherms and the pseudo-second-order kinetics model. Model parameters indicated the chemisorption was the major adsorption type responsible for the adsorption process and demonstrated a good adsorption capacity of EPS for sulfonamides, also confirmed by the
SEM
observation. Interestingly, 3D-EEM suggested that the driving force was mainly from the hydrophobic interaction of tryptophan and tyrosine during the binding process of EPS and sulfonamides.
...
PMID:Biosorption behavior and mechanism of sulfonamide antibiotics in aqueous solution on extracellular polymeric substances extracted from Klebsiella sp. J1. 3038 9
It is still unclear about the superiority of the nanoscale Fe
3
O
4
-assisted extracellular polymeric substances (EPS) compared to traditional EPS and its application feasibility in sulfonamide-contaminated aqueous system. This study reported eco-friendly and reusable EPS/Fe
3
O
4
was applied in the sulfonamide-contaminated water treatment, including sulfamethoxazole (SMX), sulfamerazine (
SM1
), sulfamethazine (SM2) and sulfadiazine (SDZ), respectively. EPS/Fe
3
O
4
exhibited the adsorption performance of 77.93%, 74.13%, 65.62%, and 56.64% for SMX,
SM1
, SM2 and SDZ, respectively, increased by 7.93%, 19.02%, 13.78% and 9.93% compared to traditional EPS. The initial pH value tuned adsorption performance via varying existing species of each sulfonamides. The adsorption process could be well fitted by Freundlich and pseudo-second-order kinetics models. Moreover, the multiple evidences from
SEM
, FTIR, zeta potential and XRD explained the adsorption mechanisms (i.e., chemisorption, ion exchange, hydroxyl group and hydrophobicity). Desorption and recycle adsorption experiments demonstrated the well regeneration ability of EPS/Fe
3
O
4
as biosorbent (67.12% adsorption performance for SMX after five adsorption-desorption cycles), suggesting EPS/Fe
3
O
4
was considered as a superior choice for sulfonamide-contaminated water treatment compared to the unrecyclable EPS.
...
PMID:Enhanced adsorption performance and regeneration of magnetic Fe
3
O
4
nanoparticles assisted extracellular polymeric substances in sulfonamide-contaminated water. 3184 42
