Kumar, Ramesh Liu, Chengjia Ha, Geon-Soo Kim, Kwang Ho Chakrabortty, Sankha Tripathy, Suraj K. Park, Young -Kwon Khan, Moonis Ali Yadav, Krishna Kumar Cabral-Pinto, Marina M. S. . Jeon, Byong-Hun 2024-01-19T09:00:47Z 2024-01-19T09:00:47Z 2023-06-29 2023-09 0921-3449 https://pubs.kist.re.kr/handle/201004/113359 An experimental investigation was conducted to recover and recycle a precious metal (molybdenum) while treating industrial wastewater using a novel membrane-integrated hybrid technology. Hollow-fiber crossflow modules containing ultrafiltration and nanofiltration membranes in the recirculation mode successfully separated 96.5% of the molybdenum from industrial wastewater. The volume of feed wastewater (250 L) was reduced by -94%, and the molybdenum concentration was increased from 1.32 to 10.2 g/L using a VNF-1 membrane for its smooth recovery (98.7%) as ammonium molybdate by chemical precipitation under response-surfaceoptimized conditions of critical parameters of NH4+/Mo ratio (1.32), pH (1.7), temperature (62 degrees C), and time (15.7 h). Further, ammonium molybdate was converted into MoO3 of high purity (99.4%) using thermal decomposition at 500 degrees C for 30 min. This is the first proof-of-concept demonstrating the use of a membrane system to recover molybdenum from industrial wastewater to promote a circular economy for recycling and regenerating valuable resources. English Elsevier A novel membrane-integrated sustainable technology for downstream recovery of molybdenum from industrial wastewater Article 10.1016/j.resconrec.2023.107035 1 Resources, Conservation and Recyclcing, v.196 Resources, Conservation and Recyclcing 196 N scie scopus 001007576400001 2-s2.0-85158896496 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article NANOFILTRATION MEMBRANES DIELECTRIC-PROPERTIES AMMONIACAL WASTE AQUEOUS-SOLUTION SODIUM ALGINATE HEAVY-METALS HUMIC-ACID REMOVAL REJECTION SURFACE Industrial wastewater Resource recovery Nanofiltration Molybdenum trioxide Sustainable technology Circular economy