title: Evaluation of poly (aspartic acid sodium salt) as a draw solute for forward osmosis.
abstract: Poly (aspartic acid sodium salt) (PAspNa) was evaluated for its potential as a novel draw solute in forward osmosis (FO). The inherent advantages of PAspNa, such as good water solubility, high osmotic pressure, and nontoxicity, were first examined through a series of physicochemical analyses and atomic-scale molecular dynamics simulations. Then, lab-scale FO tests were performed to evaluate its suitability in practical processes. Compared to other conventional inorganic solutes, PAspNa showed comparable water flux but significantly lower reverse solute flux, demonstrating its suitability as a draw solute. Moreover, fouling experiments using synthetic wastewater as a feed solution demonstrated that PAspNa reversely flowed to the feed side reduced inorganic scaling on the membrane active layer. The recyclability of PAspNa was studied using both nanofiltration (NF) and membrane distillation (MD) processes, and the results exhibited its ease of recovery. This research reported the feasibility and applicability of FO-NF or FO-MD processes using PAspNa for wastewater reclamation and brackish water desalination.
authors.affiliation: School of Civil, Environmental & Architectural Engineering, Korea University, 1-5 Ga, Anam-Dong, Sungbuk-Gu, Seoul 136-713, Republic of Korea.
authors.forename: Gimun
authors.initials: G
authors.lastname: Gwak
authors.affiliation: Energy Laboratory, SAIT, Samsung Electronics, 130 Samsung-ro, Suwon-si, Gyeonggi-do 443-803, Republic of Korea.
authors.forename: Bokyung
authors.initials: B
authors.lastname: Jung
authors.affiliation: Energy Laboratory, SAIT, Samsung Electronics, 130 Samsung-ro, Suwon-si, Gyeonggi-do 443-803, Republic of Korea.
authors.forename: Sungsoo
authors.initials: S
authors.lastname: Han
authors.affiliation: School of Civil, Environmental & Architectural Engineering, Korea University, 1-5 Ga, Anam-Dong, Sungbuk-Gu, Seoul 136-713, Republic of Korea. Electronic address: skhong21@korea.ac.kr.
authors.forename: Seungkwan
authors.initials: S
authors.lastname: Hong
mesh_terms: D001224:Aspartic Acid / Q000737:chemistry*; D057168:Distillation / Q000295:instrumentation / Q000379:methods; D005240:Feasibility Studies; D057446:Hydrodynamics; D008567:Membranes, Artificial; D009995:Osmosis; D009997:Osmotic Pressure; D010455:Peptides / Q000737:chemistry*; D059027:Recycling; D015203:Reproducibility of Results; D012964:Sodium / Q000737:chemistry; D012995:Solubility; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater / Q000737:chemistry; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D001224:Aspartic Acid; D008567:Membranes, Artificial; D010455:Peptides; D012964:Sodium; D062065:Wastewater
keywords: Antiscaling; Desalination; Draw solution; Forward osmosis (FO); Wastewater reclamation