التفاصيل البيبلوغرافية
العنوان:
Assessment of microbial products in the biosorption process of Cu(II) onto aerobic granular sludge: Extracellular polymeric substances contribution and soluble microbial products release
المؤلفون:
Jinglin Wei , Wenshan Guo , Meilin Li , Dong Wei , Weiying Xu , Guangchao Si , Bin Du , Qin Wei , Huu Hao Ngo , Linxian Huang
المصدر:
Journal of Colloid and Interface Science . 527:87-94
بيانات النشر:
Elsevier BV, 2018.
سنة النشر:
2018
مصطلحات موضوعية:
Cations, Divalent , Polymers , Surface Properties , 0208 environmental biotechnology , Fraction (chemistry) , 02 engineering and technology , 010501 environmental sciences , Waste Disposal, Fluid , 01 natural sciences , Water Purification , Biomaterials , Matrix (chemical analysis) , Metal , Biopolymers , Colloid and Surface Chemistry , Extracellular polymeric substance , Particle Size , 0105 earth and related environmental sciences , Chemical Physics , Aqueous solution , Bacteria , Sewage , Chemistry , Biosorption , Tryptophan , Sorption , 020801 environmental engineering , Surfaces, Coatings and Films , Electronic, Optical and Magnetic Materials , Kinetics , visual_art , visual_art.visual_art_medium , Thermodynamics , Adsorption , Copper , Water Pollutants, Chemical , Nuclear chemistry
الوصف:
© 2018 In the present study, the responses of microbial products in the biosorption process of Cu(II) onto aerobic granular sludge were evaluated by using batch and spectroscopic approaches. Batch experimental data showed that extracellular polymeric substances (EPSs) contributed to Cu(II) removal from an aqueous solution, especially when treating low metal concentrations, whereas soluble microbial products (SMPs) were released under the metal stress during biosorption process. A three-dimensional excitation-emission matrix (3D-EEM) identified four main fluorescence peaks in the EPS, i.e., tryptophan protein-like, aromatic protein-like, humic-like and fulvic acid-like substances, and their fluorescence intensities decreased gradually in the presence of Cu(II) during the sorption process. Particularly, tryptophan protein-like substances quenched the Cu(II) binding to a much higher extent through a static quenching process with less than one class of binding sites. According to the synchronous fluorescence spectra, the whole fluorescence intensity of released SMP samples expressed an increased trend with different degrees along with contact time. Two-dimensional correlation spectroscopy (2D-COS) suggested that the fulvic-like fluorescence fraction might be more susceptible to metal exposure than other fractions. The result of molecular weight distribution demonstrated that the SMPs released from the biosorption process differed significantly according to contact time. The result obtained could provide new insights into the responses of microbial products from aerobic granular sludge with heavy metal treatment.
وصف الملف:
application/pdf
تدمد:
0021-9797
URL الوصول:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d863d484eb15aa6c3e3fa9d6be5a2cd https://doi.org/10.1016/j.jcis.2018.05.032
حقوق:
OPEN
رقم الأكسشن:
edsair.doi.dedup.....5d863d484eb15aa6c3e3fa9d6be5a2cd
قاعدة البيانات:
OpenAIRE
