A spectra metrology insight into the binding characteristics of Cu2+ onto anammox extracellular polymeric substances

Li, Guifeng; Ma, Wenjie; Cheng, Ya-Fei; Li, Shu-Ting; Zhao, Jiawen; Li, Jingpeng; Liu, Qi; Fan, Nian-Si; Huang, Bao-Cheng; Jin, Ren‐Cun

doi:10.1016/j.cej.2020.124800

Cited by 55 publications

(20 citation statements)

References 43 publications

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“…(cm −1 ) Annotations Wave no. (cm −1 ) Annotations 4069 –OH hydroxyl groups stretching 4056 –OH hydroxyl groups stretching “alcohol” 13 Bhattacharya et al 71 3442 –OH or N–H stretching 3597, 3578, 3557 Strong broad –OH stretching − 155 Li et al 72 2934 C–H stretching of aliphatic hydrogens or OH stretching 2940 Medium C–H stretching “alkane” − 6 Zhao et al 73 2349 Carbon dioxide or Si–C stretching 2351 Carbon dioxide or Si–C stretching − 2 – 2250 Weak S–H stretching “thiol” 2239 Weak C≡N stretching “nitrile” or weak C≡C stretching “alkyne” 11 Samson & Otaraku Ipeghan 74 2169 Strong S–C≡N stretching “thiocyanate” 2167 Strong S–C≡N stretching “thiocyanate” 2 Dujearic-Stephane et al 75 1642 C=O amidic carbonyl or strong C=C stretching 1665 C=O, Carbonyl group “ketonic carbonyl” “conjugated ketone” − 23 Di et al 76 1542 C=C stretching or Amide–II (protein N–H bend, C–N stretch) 1547 Strong N–O stretching “nitro compound” …”

Section: Resultsmentioning

confidence: 99%

“…Consequently, an absorption band at ν = 4069 cm −1 was identified for –OH hydroxyl group stretching as indicated by Bhattacharya et al 71 . Li et al 72 established the absorption band at ν = 3442 cm −1 for –OH or N–H stretching vibration band. In addition, Zhao et al 73 characterized the absorption band at ν = 2934 cm −1 for C–H stretching of aliphatic hydrogens or OH stretching alcohol.…”

Section: Resultsmentioning

confidence: 99%

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Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

El‐Naggar

Hamouda

El-Khateeb

et al. 2021

Sci Rep

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Remazol brilliant blue (RBB) is an anthraquinone anionic dye that has several commercial uses, especially in the textile industries and is well-known for its detrimental impacts on marine life and the surrounding ecosystem. Mercury (Hg2+) is also one of the most severe hazardous environmental contaminants due to its bioaccumulation through the food chain and high toxicity to the human embryo and fetus. The biosorption potential of Gelidium corneum biomass for bioremoval of Hg2+ and RBB dye simultaneously from binary mixture was assessed. The effects of initial pH, contact time, Hg2+, RBB, and biomass concentrations on the biosorption process were investigated in 50 batch experiments using a Face-centered central composite design. The maximum removal percentage of Hg2+ (98.25%) was achieved in the run no. 14, under optimum experimental conditions: 200 mg/L Hg2+, 75 mg/L RBB, pH 5. At 30 °C, 4 g/L algal biomass was used, with a contact time of 180 min. Whereas, the maximum removal percentage of RBB (89.18%) was obtained in the run no. 49 using 200 mg/L Hg2+, 100 mg/L RBB, pH 5, 4 g/L algal biomass and 180 min of contact time. FTIR analysis of Gelidium corneum biomass surface demonstrated the presence of many functional groups that are important binding sites responsible for Hg2+ and RBB biosorption. SEM analysis showed apparent morphological alterations including surface shrinkage and the appearance of new shiny adsorbate ion particles on the Gelidium corneum biomass surface after the biosorption process. The EDX study reveals an additional optical absorption peak for Hg2+, confirming the role of Gelidium corneum biomass in Hg2+ biosorption. In conclusion, Gelidium corneum biomass has been shown to be an eco-friendly, sustainable, promising, cost-effective and biodegradable biosorbent to simultaneously biosorb Hg2+ and RBB dye from aquatic ecosystems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

El‐Naggar

Hamouda

El-Khateeb

et al. 2021

Sci Rep

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“…Other details can be found in our previous work. 22 MATLAB 2014b was used to perform parallel factor (PARAFAC) analysis. 27 A dual beam spectrophotometer (UV-4500, Shimadzu Co., Japan) was used to collect ultraviolet (UV) absorption spectra from 190 to 400 nm.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…19 The difference in EPSs characteristics would affect the effectiveness and the binding strength of sludge toward antibiotics. 20,21 Specifically, protein was widely identified as the leading component of anammox sludge EPSs 19,22 and it was found to play an important role in anammox sludge stability and aggregation ability. 19,23 Although the current research studies have provided basic information on the combination of antibiotics and anammox sludge EPSs, the effect of antibiotics on the extracellular protein structure change is still unclear.…”

Section: ■ Introductionmentioning

confidence: 99%

Molecular Insight into the Binding Property and Mechanism of Sulfamethoxazole to Extracellular Proteins of Anammox Sludge

Ren

et al. 2021

Environ. Sci. Technol.

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Antibiotics are widely found in nitrogen-containing wastewater, which may affect the operation stability of anaerobic ammonium oxidation (anammox)-based biological treatment systems. Extracellular polymeric substances (EPSs) of anammox sludge play a pivotal role in combining with antibiotics; however, the exact role and how the structure of the leading component of EPSs (i.e., extracellular proteins) changes under antibiotic stress remain to be elucidated. Here, the interaction between sulfamethoxazole and the extracellular proteins of anammox sludge was investigated via multiple spectra and molecular simulation. Results showed that sulfamethoxazole statically quenched the fluorescent components of EPSs, and the quenching constant of the aromatic proteins was the largest, with a value of 1.73 × 104 M–1. The overall binding was an enthalpy-driven process, with ΔH = −75.15 kJ mol–1, ΔS = −0.175 kJ mol–1 K–1, and ΔG = −21.10 kJ mol–1 at 35 °C. The O-P-O and CO groups responded first under the disturbance of sulfamethoxazole. Excessive sulfamethoxazole (20 mg L–1) would decrease the ratio of α-helix/(β-sheet + random coil) of extracellular proteins, resulting in a loose structure. Molecular docking and dynamic simulation revealed that extracellular proteins would provide abundant sites to bind with sulfamethoxazole, through hydrogen bond and Pi-Akyl hydrophobic interaction forces. Once sulfamethoxazole penetrates into the cell surface and combines with the transmembrane ammonium transport domain, it may inhibit the NH4 + transport. Our findings enhance the understanding on the interaction of extracellular proteins and sulfamethoxazole, which may be valuable for deciphering the response property of anammox sludge under the antibiotic stress.

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“…As we know, the anammox bacteria are surrounded and compressed by EPS. When heavy metals enter the influent water, the negatively charged functional groups in PN and PS could effectively bound with heavy metal ions, which were considered as a kind of osmotic protective agents to prevent the metals from entering the intracellular environment (Hou et al, 2015;Li et al, 2020b). In addition, some exogenous enzymes contained in EPS could also bind and inhibit the migration of heavy metal ions and protect the anammox bacteria from damage.…”

Section: Eps Changes For the Inhibition Of Heavy Metalmentioning

confidence: 99%

Effects of Heavy Metals on the Performance and Mechanism of Anaerobic Ammonium Oxidation for Treating Wastewater

Ren¹,

Gao²,

Wang³

2022

Front. Chem. Eng.

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Persistence of ammonium nitrogen and heavy metals in wastewater still remains a challenge, and many wastewater treatment plants face the challenge of removing nitrogen under heavy metal stresses. There is no preferred method for the biological treatment of wastewater containing nitrogen and heavy metals with the possible exception of the anaerobic ammonium oxidation (anammox), since it has shown promise for removing nitrogen under heavy metal stresses. This article reviews the recent research results of the nitrogen-removal performance and mechanism by the anammox process under heavy metal stresses, mainly discussing the enhancing and inhibition effects of heavy metals on the performance of the Anammox reactor. The influencing mechanism of heavy metals on the microbial community and extracellular polymeric substances is also presented, and examples are given for explanation. The main problems of the present research are pointed out, and it is proposed that unifying the metal ion concentrations of inhibiting or promoting anammox activity is necessary for the development and industrial application of the anammox process. The information of this review can offer a great possibility for achieving desired nitrogen removal in wastewater treatment under heavy metal stresses and with significant energy savings.

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A spectra metrology insight into the binding characteristics of Cu2+ onto anammox extracellular polymeric substances

Cited by 55 publications

References 43 publications

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

Molecular Insight into the Binding Property and Mechanism of Sulfamethoxazole to Extracellular Proteins of Anammox Sludge

Effects of Heavy Metals on the Performance and Mechanism of Anaerobic Ammonium Oxidation for Treating Wastewater

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