| Title: | Fate and wetting potential of bio-refractory organics in membrane distillation for coke wastewater treatment |
| Author(s): | Ren J; Li J; Chen Z; Cheng F; |
| Address: | "Institute of Resources and Environmental Engineering, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan, 030006, China. Institute of Resources and Environmental Engineering, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan, 030006, China. Electronic address: lijianfeng@sxu.edu.cn. Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA, 5095, Australia. Institute of Resources and Environmental Engineering, Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes, Shanxi University, Taiyuan, 030006, China. Electronic address: cfangqin@sxu.edu.cn" |
| DOI: | 10.1016/j.chemosphere.2018.06.002 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "Membrane distillation (MD) has been hindered in industrial applications due to the potential wetting or fouling caused by complicated organic compositions. This study investigated the correlations between the fate and wetting potential of bio-refractory organics in the MD process, where three coke wastewater samples pre-treated with bio-degradation and coagulation served as feed solutions. Results showed that although most of the bio-refractory organics in coke wastewater were rejected by the hydrophobic membrane, some volatile aromatic organics including benzenes, phenols, quinolines and naphthalenes passed through the membrane during the MD process. Interestingly, membrane wetting occurred coincidently with the penetration of phenolic and heterocyclic organics. The wetting rate was obviously correlated with the feed composition and membrane surface properties. Ultimately, novel insights into the anti-wetting strategy of MD with bio-refractory organics was proposed, illustrating that the polyaluminum chloride/polyacrylamide coagulation not only removed contaminants which could accelerate membrane wetting, but also retarded membrane wetting by the complexation with organics. The deposition of these complexes on the membrane surface introduced a secondary hydrophilic layer on the hydrophobic substrate, which established a composite membrane structure with superior wetting resistance. These new findings would be beneficial to wetting control in membrane distillation for wastewater treatment" |
| Keywords: | "Coke/*analysis *Distillation Hydrophobic and Hydrophilic Interactions *Membranes, Artificial Surface Properties Volatile Organic Compounds/*chemistry Wastewater/*chemistry Water Purification/*methods *Wettability Bio-refractory organics Coke wastewater Me;" |
| Notes: | "MedlineRen, Jing Li, Jianfeng Chen, Zuliang Cheng, Fangqin eng England 2018/06/11 Chemosphere. 2018 Oct; 208:450-459. doi: 10.1016/j.chemosphere.2018.06.002. Epub 2018 Jun 2" |
