Abstract
In this work, we demonstrated a strategy to design a modified starch/polyvinyl alcohol composite (CCSP), which was employed as a highly efficient and economical fixed-bed adsorbent for treating textile wastewater. Characterization revealed that most of the CCSP was shaped with the morphology of sphericity, and had some water swelling properties. The crystallinity of the CCSP was lower than that of native starch and polyvinyl alcohol, and its average particle size gradually increased with the dosage increase of cationic starch in the preparation. Adsorption experiments showed that the adsorption capacities of CCSP were more than 605 and 539 mg/g for Reactive Black 5 and Reactive Orange 131, respectively, which were over 10 times larger than that of commercial activated carbon (AC). The mixture adsorbent composed of CCSP and AC could remove starch, polyvinyl alcohol, and dyes from textile wastewater completely and simultaneously combined with the fixed-bed technique, and its adsorption capacity was conducted as a function of the bed height and flow rate. Most importantly, the disabled mixture adsorbent could be converted into regenerated AC through a chemical activation process, thereby avoiding the production of solid waste. This study will provide a new efficient green sustainable method for treating textile wastewater.
Highlights
The environmental problems caused by textile printing and dyeing wastewater have become the focus of attention
These results indicated that the adsorption capacities of the composite microspheres (CCSP) could be developed based on the respective advantages of cationic starch (CCS) and cationic PVA (CCP) when they were used to treat practical textile wastewater
A novel modified starch/polyvinyl alcohol composite (CCSP) was prepared and employed as a had some of the swelling properties of water absorption and a lower crystallinity
Summary
The environmental problems caused by textile printing and dyeing wastewater have become the focus of attention. PVA-containing wastewater [5,10,11,12,13], but so far, there have been no reports on the simultaneous removal of dyes, PVA, and starch from textile printing and dyeing wastewater These methods have many difficulties for industrial application, due to the high cost of investment and operation, complicated processes, and inability to remove pollutants completely [5,12,14]. Cationic starch derivatives with quaternary ammonium groups are commonly an efficient and low-cost fixed-bed adsorbent alternative. A result PVA of the strong hydrophilic, quaternary ammonium groups, cationic starch adsorb anionicfunctional compounds,polymers, and have been utilized for removing ions and PVA derivatives derivativescan are important andwidely are widely used in paper,various medicine, organic [37,38,39]. Work will provide new inspiration and ideas for the development of environmentally-friendly textile wastewater techniques
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
