کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
679802 1459958 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of extracellular polymeric substances in biosorption of dye wastewater using aerobic granular sludge
ترجمه فارسی عنوان
نقش مواد پلیمری خارج سلولی در جذب بیولوژیکی فاضلاب رنگی با استفاده از لجن گرانول هوازی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


• Biosorption of methylene blue onto aerobic granular sludge was studied.
• Extracellular polymeric substances gradually quenched during sorption process.
• The main fluorescence quenching was caused by tryptophan residues.
• Quenching type belonged to a combined dynamic and static quenching.

In this study, the role of extracellular polymeric substances (EPS) in biosorption of dye wastewater was evaluated using aerobic granular sludge as biosorbent. Based on the experimental data, the removal efficiencies of methylene blue (MB) by EPS and Sludge were 9.38 and 80.72%, respectively, implying that EPS made a certain contribution for MB removal. The adsorption rates of EPS, Sludge, and total Sludge + EPS for MB were better fitted with pseudo-second order kinetic model, and the equilibrium adsorption isotherm data agreed well with Langmuir model. The interaction between EPS and MB was explored by a combined three-dimensional excitation–emission matrix (3D-EEM) and synchronous fluorescence spectra. 3D-EEM indicated that protein- and humic acid-like substances were the main peaks of EPS, and gradually quenched with increased MB concentrations. According to synchronous fluorescence spectra, the main fluorescence quenching was caused by tryptophan residues, and the type belonged to a combined dynamic and static quenching.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 185, June 2015, Pages 14–20
نویسندگان
, , , , , , , ,