The Experts below are selected from a list of 8019 Experts worldwide ranked by ideXlab platform
Narayan Chandra Das - One of the best experts on this subject based on the ideXlab platform.
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phase transited lysozyme particles and mos2 nanosheets modified elastomer like antibacterial and antifouling microfiltration membrane derived from poly ethylene co methyl acrylate poly vinylidene fluoride ema pvdf blend for Water Purification Application
Microporous and Mesoporous Materials, 2021Co-Authors: Sanjay Remanan, Paresh Kumar Samantaray, Suryasarathi Bose, Narayan Chandra DasAbstract:Abstract Phase inversion is a widely exploited membrane preparation method and a workhorse in the membrane industries. Notwithstanding its expansive utility, this method is limited to polymers that are soluble in organic solvents. In the current study, a microfiltration membrane was prepared from the poly(ethylene-co-methyl acrylate)/poly(vinylidene fluoride) (EMA/PVDF) blend by selective etching, a recently introduced membrane preparation technique used for polymers that are chemically resistant to the common organic solvents. The developed membrane surfaces were modified with two structurally different antibacterial agents: phase-transited lysozyme (PTL) and MoS2 nanosheets. PTL nanoparticles were deposited over the membrane by dip-coating, whereas MoS2 nanosheets were decorated on the membrane by vacuum filtration followed by chitosan dip-coating. The surface-modified membrane exhibited extensive antibacterial and antifouling properties. Antibacterial properties were studied against bacteria viz. Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), and PTL-derived membrane were observed to have the highest reduction in bacterial growth against E. coli (98.14%) and S. aureus (93.64%). Inline bacterial filtration study demonstrated high separation efficiency of the modified membranes as there were no significant traces of bacteria even after 200 h of the experiment. Antifouling properties of MoS2 derived membranes (flux recovery ratio (FRR) = 88%) were superior to those of control and PTL-coated membranes (FRR = 63%). Additionally, the elastomer-like behavior of EMA copolymer helped retain the initial membrane flux for three consecutive days indicating high compaction resistance of the membrane. Hence, the developed EMA membrane is anticipated to be a potential microfiltration candidate for Water Purification Applications.
Al-saad K. - One of the best experts on this subject based on the ideXlab platform.
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Pomegranate peels as versatile adsorbents for Water Purification: Application of box–behnken design as a methodological optimization approach
'Wiley', 2019Co-Authors: El-azazy M., Kalla R.n., Issa A.a., Al-sulaiti M., El-shafie A.s., Shomar B., Al-saad K.Abstract:Pomegranate peels (PGP) were tested as a green adsorbent for the removal of Ni(II) from contaminated Water samples. Both raw (RPG), and char/burnt peels (BPG) were tested. A multivariate analysis approach, Box–Behnken (BB) design was executed to augment the efficiency of BPG as adsorbent. Three factors were considered thereof; contact time (CT), adsorbent dose (AD), and heavy metal concentration (HMC). The percentage of heavy metal removal was the designated response (Y). Main effects plot together with analysis of variance (ANOVA) were used to decide on the substantial factors. Obtained results showed that AD was the most significant linear factor, while the interaction between AD*HMC was the most influential two‐way interaction. Contour and response surface plots were used to study the factorial interactions and optimize the response. Desirability function was used to find the best factorial combination for maximum removal of Ni(II). Efficacies of both adsorbents were compared and BPG was more effectual achieving 99.99% removal of Ni(II). Surface morphology was characterized using FTIR, BET, SEM, and EDX analyses. Results indicated that functional groups such as hydroxyl, amino, carboxylic acid are available on surface of PGP and might be responsible for the adsorption process. © 2019 American Institute of Chemical Engineers Environ Prog, 38: e13223, 2019This work was made possible by UREP award [UREP 20-116-1-020] from the Qatar National Research Fund (a member of The Qatar Foundation). The statements made herein are solely the responsibility of the authors.Scopu
Jason Q Niu - One of the best experts on this subject based on the ideXlab platform.
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advanced nanofiltration membrane fabricated on the porous organic cage tailored support for Water Purification Application
Separation and Purification Technology, 2020Co-Authors: Zhe Zhai, Na Zhao, Jiahui Liu, Wenjing Dong, Haixiang Sun, Jason Q NiuAbstract:Abstract The support layer have been recently recognized as an important factor in tailoring the performance of thin film composite membranes, but until now limited methods are available to optimize the support properties for the fabrication of high-performance nanofiltration (NF) membrane. Herein, Noria, one kind of porous organic cages, was employed as the filler to prepare Noria hybrid polysulfone (PSF) support through non-solvent-induced phase separation (NIPS). Owing to its good solubility in N-methylpyrrolidone, the blended Noria could distribute in the dope solution homogeneously and the structure and surface properties of the resulting support were finely tuned. Assisted from the inner cavity of Noria as well as enhanced hydrophilicity, the pure Water flux of support membrane with a Noria loading of 3.60 wt% reached 125 L m−2 h−1 bar−1, which was nearly 2.5-fold higher than the pristine one. In addition to that entrapped in the PSF chains, a mass of Noria molecules aggregated on support surface during the NIPS process and they could be further etched by alkaline solution, in situ enlarging the surface pore size. After the interfacial polymerization (IP), the NF membrane fabricated on the etched support depicted excellent performance compared with those incorporated with other fillers either in the support or in the polyamide layer. Furthermore, this study could promote the understanding about the role of support in the IP process for the preparation of TFC membranes.
Jieshu Qian - One of the best experts on this subject based on the ideXlab platform.
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multi functional magnetic Water purifier for disinfection and removal of dyes and metal ions with superior reusability
Journal of Hazardous Materials, 2018Co-Authors: Lei Chen, Xuwei Long, Xiaolin Zhang, Bingcai Pan, Jieshu QianAbstract:Abstract It is of great practical importance but rarely reported to design a multifunctional scavenger for Water Purification. In this study, we describe a sophisticated preparation of an inorganic/organic composite sample for the simultaneous removal of anionic dyes and metal ions, as well as disinfection. The sample has a stable structure formed by the covalent connection between a magnetic silica (MS) core and a polyethylenimine derived quaternary ammonium compound (QAC) corona. We characterized the sample in details by SEM, TEM, EDX, FT-IR, XRD, TGA, VSM, and zeta potential. Our QAC-MS sample exhibited superior performance and reusability in the disinfection and adsorption experiments towards acid fuchsin and Cu2+. With the virtue of easy separation from solution, our sample should be an ideal candidate for Water Purification Application.
Sanjay Remanan - One of the best experts on this subject based on the ideXlab platform.
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phase transited lysozyme particles and mos2 nanosheets modified elastomer like antibacterial and antifouling microfiltration membrane derived from poly ethylene co methyl acrylate poly vinylidene fluoride ema pvdf blend for Water Purification Application
Microporous and Mesoporous Materials, 2021Co-Authors: Sanjay Remanan, Paresh Kumar Samantaray, Suryasarathi Bose, Narayan Chandra DasAbstract:Abstract Phase inversion is a widely exploited membrane preparation method and a workhorse in the membrane industries. Notwithstanding its expansive utility, this method is limited to polymers that are soluble in organic solvents. In the current study, a microfiltration membrane was prepared from the poly(ethylene-co-methyl acrylate)/poly(vinylidene fluoride) (EMA/PVDF) blend by selective etching, a recently introduced membrane preparation technique used for polymers that are chemically resistant to the common organic solvents. The developed membrane surfaces were modified with two structurally different antibacterial agents: phase-transited lysozyme (PTL) and MoS2 nanosheets. PTL nanoparticles were deposited over the membrane by dip-coating, whereas MoS2 nanosheets were decorated on the membrane by vacuum filtration followed by chitosan dip-coating. The surface-modified membrane exhibited extensive antibacterial and antifouling properties. Antibacterial properties were studied against bacteria viz. Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), and PTL-derived membrane were observed to have the highest reduction in bacterial growth against E. coli (98.14%) and S. aureus (93.64%). Inline bacterial filtration study demonstrated high separation efficiency of the modified membranes as there were no significant traces of bacteria even after 200 h of the experiment. Antifouling properties of MoS2 derived membranes (flux recovery ratio (FRR) = 88%) were superior to those of control and PTL-coated membranes (FRR = 63%). Additionally, the elastomer-like behavior of EMA copolymer helped retain the initial membrane flux for three consecutive days indicating high compaction resistance of the membrane. Hence, the developed EMA membrane is anticipated to be a potential microfiltration candidate for Water Purification Applications.
