OICC PRESS Removal of tetracycline from aqueous solution using Fe-doped zeolite Volume 10 (2019) Issue 4, December 2019 2023 10 18 Removal of tetracycline from aqueous solution using Fe-doped zeolite https://doi.org/10.1007/s40090-019-0191-6 EN M. H. Jannat Abadi Chemical Engineering Department, Islamic Azad University, Neyshabur Branch, Neyshabur, Iran 0000-0002-4299-3106 S. M. M. Nouri Chemical Engineering Department, Hakim Sabzevari University, Sabzevar, 9617976487, Iran 0000-0002-4299-3106 R. Zhiani Chemical Engineering Department, Hakim Sabzevari University, Sabzevar, 9617976487, Iran H. D. Heydarzadeh Chemistry Department, Islamic Azad University, Neyshabur Branch, Neyshabur, Iran A. Motavalizadehkakhky Chemistry Department, Islamic Azad University, Neyshabur Branch, Neyshabur, Iran Journal Article 2023 10 18 Tetracycline is one of the most widely used antibiotics that causes contamination of aqueous environments and has raised serious concern during the past few years. In this work, adsorption of tetracycline on a modified zeolite was studied through a batch system. Synthetic zeolite 13X was modified using Fe(III). The results show that the removal efficiency of tetracycline by modified zeolite has considerably increased. Different experiments were carried out in order to analyze the effect of parameters such as pH, initial concentration of tetracycline, time, etc. The results indicate that tetracycline adsorption on the zeolite strongly depends on the pH of the solution due to amphoteric functional groups of tetracycline and maximum adsorption capacity of tetracycline by modified zeolite with a pH of approximately 6. The Langmuir isotherm shows good agreement with the experimental data suggesting monolayer adsorption. Maximum adsorption capacity of the modified zeolite reached at the experiments is almost 200 mg/g. XRD, XRF and FTIR results confirm the existence of the Fe phase in the zeolite texture. Amide groups of TC were responsible for the complexation with Fe3+. Also, tetracycline removal was studied in a continuous column to simulate an industrial waste water process.

OICC PRESS The effect of Merpol surfactant on the morphology and performance of PES/PVP membranes: antibiotic separation Volume 10 (2019) Issue 4, December 2019 2023 10 18 The effect of Merpol surfactant on the morphology and performance of PES/PVP membranes: antibiotic separation https://doi.org/10.1007/s40090-019-0192-5 EN Maryam Omidvar Department of Chemical Engineering, Quchan Branch, Islamic Azad University, Quchan, Iran 0000-0001-9868-1665 Zahra Hejri Department of Chemical Engineering, Quchan Branch, Islamic Azad University, Quchan, 94791-76135, Iran 0000-0002-8379-7101 Ahmad Moarefian Chemical Engineering Department, Faculty of Petroleum, Gas and Petrochemical Engineering, Persian Gulf University, Bushehr, 7516913798, Iran Journal Article 2023 10 18 The present study used modified nanofiltration (NF) membranes to remove the emerging contaminant of amoxicillin (AMX) from synthetic wastewater. For this purpose, Merpol surfactant and polyvinylpyrrolidone were added to the casting solutions to prepare flat sheet asymmetric polyethersulfone (PES) NF membranes through phase inversion process. Then, the effect of adding Merpol surfactant at different concentrations on the morphology, hydrophilicity, and pure water flux (PWF) of the membranes, as well as the separation of AMX from aqueous solutions was investigated. The characteristics of the prepared membranes were studied by scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), contact angle (CA) measurement and performance tests. The obtained results approved the improved hydrophilicity of the PES membranes after adding Merpol surfactant to the casting solution. The findings also revealed a gradual increase in the average size of the membrane pores in sub-layer and thinner top layer, proportional to the increase of surfactant content in the solution. The results also confirmed the increase of PWF under the influence of surfactant increase. As a result, for the membrane containing 8 wt% Merpol additive, the lowest CA (52.08°), the highest PWF (76.31 L/m2 h), and maximum AMX excretion (97%) were achieved.

OICC PRESS Dynamical modeling of substrate and biomass effluents in up-flow anaerobic sludge blanket (UASB) biogas reactor Volume 10 (2019) Issue 4, December 2019 2023 10 18 Dynamical modeling of substrate and biomass effluents in up-flow anaerobic sludge blanket (UASB) biogas reactor https://doi.org/10.1007/s40090-019-00194-w EN Gunawan Nugroho Department of Engineering Physics, Institut Teknologi Sepuluh Nopember, Kampus ITS, Sukolilo, Surabaya, 60111, Indonesia 0000-0001-7032-8210 Surya A. Santoso Department of Engineering Physics, Institut Teknologi Sepuluh Nopember, Kampus ITS, Sukolilo, Surabaya, 60111, Indonesia Journal Article 2023 10 18 Organic liquid waste from food production industry is inevitable. High chemical oxygen demand (COD) contents in organic liquid waste could disrupt the water ecosystem. On the other hand, COD contents can be reduced and utilized to produce biogas by UASB reactor. However, there is a problem in operating UASB reactor, namely the high biomass content in methanogenic granule form, which is washed out with the effluent. The influent flow rate affects biomass content and the suitable flow rate is important for the particular UASB reactor. To investigate the matter, the estimation of Monod parameters is determined to study the kinetics of substrate (COD) and biomass (active methanogenic granule). In this work, simulations of lumped and distributed models are performed to observe the behavior of substrate and biomass inside the reactor. It is concluded that the suitable influent flow rate for UASB reactor is 150–175 m3/h, and the washed out biomass content is relatively low (from 0.001393 to 0.4919 kg/m3). The steady-state condition is achieved from 2027 to 2533 days, with high COD removal.

OICC PRESS Highly dispersed cobalt Fischer–Tropsch synthesis catalysts supported on γ-Al2O3, CNTs, and graphene nanosheet using chemical vapor deposition Volume 10 (2019) Issue 4, December 2019 2023 10 18 Highly dispersed cobalt Fischer–Tropsch synthesis catalysts supported on γ-Al2O3, CNTs, and graphene nanosheet using chemical vapor deposition https://doi.org/10.1007/s40090-019-00195-9 EN Iraj Kazemnejad Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran Alireza Feizbakhsh Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran 0000-0002-1179-6986 Ali Niazi Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran Ahmad Tavasoli School of Chemistry, College of Science, University of Tehran, Tehran, Iran Journal Article 2023 10 18 Highly dispersed 15.0 wt% cobalt catalysts were prepared on γ-Al2O3, carbon nanotubes (CNTs), and graphene nanosheet (GNS) using chemical vapor deposition (CVD) procedure. The physico-chemical properties of the catalysts were studied by inductively coupled plasma (ICP), Brunauer–Emmett–Teller (BET), X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), and temperature-programmed reduction (TPR) techniques, and the Fischer–Tropsch synthesis (FTS) performance of the catalysts was assessed at 220 °C, 18 bar, H2/CO = 2 and feed flow rate of 45 ml/min g cat. Based on BET results, Co/GNS catalyst provided highest surface area in comparison to the other catalysts. XRD and FESEM results revealed that CVD method prepared smaller particles on GNS compared to the other supports and resulted in the most dispersed metal particles on GNS according to H2-chemisorption results. The performance of Co/Al2O3 catalyst prepared by CVD method was compared with conventional 15 wt% Co/Al2O3 catalyst prepared by impregnation method. The Co/Al2O3 catalyst prepared with CVD method showed 5.3% higher %CO conversion and 2.1% lower C5+ selectivity as compared with the Co/Al2O3 catalysts prepared by impregnation method. Among three catalysts prepared by CVD, Co/GNS showed higher %CO conversion of 78.4% and C5+ selectivity of 70.3%. Co/γ-Al2O3 catalyst showed higher stability.

OICC PRESS Suitability of aluminum material on sugar industry wastewater with chemical and electrochemical treatment processes Volume 10 (2019) Issue 4, December 2019 2023 10 18 Suitability of aluminum material on sugar industry wastewater with chemical and electrochemical treatment processes https://doi.org/10.1007/s40090-019-00196-8 EN Omprakash Sahu Department of Chemical and Petroleum Engineering, UIE, Chandigarh University, Gharuan, Mohali, India 0000-0002-6203-6389 Journal Article 2023 10 18 Aluminum is a valuable material, which can be used for water and wastewater treatment. It exists in metal as well as in salt form. The efficiency of water and wastewater treatment depends upon the technology applied to treat. Sugarcane industry is coming under those industries which have a large amount of freshwater and release large amount of effluent. The goal of this research work is to study the behavior of aluminum metal and salt for the treatment of sugar industry wastewater on chemical oxidation and electrochemical oxidation. The effect of pH, dosing, temperature and catalysis on metal and salt has been also studied with both treatment methods. The results show that maximum 90% of chemical oxygen demand and 94% of color removal can be achieved with an aluminum electrode (electrocoagulation) at optimum conditions, pH 7, current density 178 A/m2, electrode distance 20 mm, and salt solution 0.5 M NaCl. In the same way, 81% chemical oxygen demand and 85% color removal were achieved with alum for the 0.5 M lime solution, at 50 mM mass loading, 21 °C operating temperature and optimum pH of 7, respectively. The sludge generated after treatment was also analyzed with settling filtration, thermal, FTIR and SEM.