scholarly journals Surface-Bound Humic Acid Increased Propranolol Sorption on Fe3O4/Attapulgite Magnetic Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 205
Author(s):  
Yuehua Deng ◽  
Yani Li
Keyword(s):  
Magnetic Nanoparticles ◽  
Humic Acid ◽  
Sorption Capacity ◽  
Sorption Process ◽  
Preparation Conditions ◽  
Effects Of Ph ◽  
Donor Acceptor ◽  
Sorbent Materials ◽  
Similar Preparation ◽  
Sorption Mechanisms

This study explored the feasibility of utilizing a novel sorbent humic acid (HA) coated Fe3O4/attapulgite (MATP) magnetic nanoparticles (HMATP) for the sorption of propranolol from aqueous solutions. MATP and bare Fe3O4 nanoparticles were also synthesized under similar preparation conditions. The FTIR, Zeta potential, XRD, VSM, TEM, and TGA analyses were conducted to characterize the sorbent materials. The effects of pH, sorbent dosage, ionic strength, HA in the aqueous solution, contact time and initial sorbate concentration on sorption of propranolol were investigated using batch sorption experiments. The results suggested that the sorption capacity of HMATP showed little change from pH 4 to 10. Na+ and Ca2+ slightly inhibited the sorption of propranolol on HMATP. While HA in solution enhanced both MATP and HMATP, which indicated that HMATP can resist HA interference in water. Further, the less leaching amounts of Fe and HA suggested a good stability of HMATP. In all conditions, sorption capacity of propranolol on HMATP was obviously higher than that on MATP, which indicated that surface-coated HA played an important role in the propranolol sorption process. Electrostatic interaction, cation exchange, hydrogen bonding, and π–π electron donor acceptor interactions were considered as the sorption mechanisms.

scholarly journals Influence of water washing treatment on Ulva prolifera-derived biochar properties and sorption characteristics of ofloxacin

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chenghu Yang ◽  
Shichao Miao ◽  
Tiejun Li
Keyword(s):  
Sorption Capacity ◽  
Sorption Process ◽  
Sorption Kinetics ◽  
Ulva Prolifera ◽  
Solution Temperature ◽  
Solution Ph ◽  
Water Washing ◽  
Influence Of Water ◽  
Sorption Mechanisms ◽  
Sorption Characteristics

AbstractThe influences of water washing treatment on the properties of Ulva prolifera-derived biochar (U.P-biochar) and its sorption characteristics of ofloxacin (OFL) were investigated. The results showed that the water washing treatment significantly changed the physiochemical structures of U.P-biochars, and improved the sorption capacity of OFL. The sorption capacity of OFL by U.P-biochar was closely dependent on pyrolysis temperature (200–600 °C) and equilibrium solution pH (3–11). Different sorption mechanisms (e.g. cation exchange, electrostatic attraction, H-bond and cationic–π and π–π interactions) were dominant for specific U.P-biochars under various pH regions (acidic, neutral and alkaline). Moreover, the unwashed and washed U.P-biochars prepared at 200 °C (BC200 and BCW200) showed a higher sorption capacity of OFL at pH = 7. The two-compartment first-order model provided an appropriate description of the sorption kinetics of OFL by BC200 and BCW200 (R2 > 0.98), which revealed that the contribution ratios between the fast and slow sorption compartments (ffast/fslow, 1.55 for BC200 and 1.25 for BCW200) reduced after water washing treatment of U.P-biochar. The values of n for the Freundlich model were less than 1, which demonstrated that the sorption of OFL by BC200 and BCW200 was favourable and nonlinear. Also, the sorption of OFL by BC200 and BCW200 increased with an increase in solution temperature and the sorption process was spontaneous and endothermic. This study provides valuable information for being a primary consideration in the production and application of U.P-biochar.

A Comparative Sorption Study of Ni (II) form Aqueous Solution Using Silica Gel, Amberlite IR-120 and Sawdust

2019 ◽  
Vol 233 (9) ◽  
pp. 1275-1292 ◽  
Author(s):  
Atta ul Haq ◽  
Muhammad Rasul Jan ◽  
Jasmin Shah ◽  
Maria Sadia ◽  
Muhammad Saeed
Keyword(s):  
Sorption Capacity ◽  
Silica Gel ◽  
Low Cost ◽  
Sorption Process ◽  
Second Order ◽  
Order Kinetic ◽  
Sorption Data ◽  
Desorption Study ◽  
Pseudo Second Order ◽  
Sorption Study

Abstract The presence of heavy metals in water causes serious problems and their treatment before incorporating into the water body is a challenge for researchers. The present study was conducted to compare the sorption study of Ni (II) using silica gel, amberlite IR-120 and sawdust of mulberry wood in batch system under the influence of pH, initial Ni (II) concentration and contact time. It was observed that sorption process was depending upon pH and maximum sorption was achieved at pH 7.0. Kinetic data were well fitted into pseudo-second order kinetic model due to high R2 values and closeness of experimental sorption capacity and calculated sorption capacity of pseudo-second order. Isotherms study showed that Langmuir is one of the most suitable choices to explain sorption data due to high R2 values. The monolayer sorption capacities of silica gel, amberlite IR-120 and sawdust were found to be 33.33, 25.19, and 33.67 mg g−1, respectively. Desorption study revealed that NaCl is one of the most appropriate desorbent. It may be concluded from this study that sawdust is a suitable sorbent due to low cost, abundant availability and recycling of the materials for further study.

INTENSIFICATION OF CLEANING OF DRAINS OF DAIRY INDUSTRY

2019 ◽  
Author(s):  
Л.А. Марченко ◽  
Т.Н. Боковикова
Keyword(s):  
Sorption Capacity ◽  
Dairy Industry ◽  
Sorption Process ◽  
Optimal Conditions ◽  
Cleaning Efficiency ◽  
Factors Affecting ◽  
Second Stage ◽  
Coagulation Process ◽  
Model Solutions

Проведен анализ состава сточных вод предприятий молочной промышленности. Исследованы технические характеристики сорбционных материалов, способных восстановить состав ресурса до норм ПДК. Установлено, что применение двухстадийной очистки модельных растворов с использованием на 1й стадии процесса коагуляции, на 2й сорбции позволяет увеличить эффективность очистки до 92. Оценена сорбционная емкость сорбентов и проанализированы факторы, на нее влияющие. Подобраны оптимальные условия проведения процесса сорбции в зависимости от условий и характера объектов очистки. The analysis of the wastewater composition of the dairy industry was carried out. The technical characteristics of a number of sorption materials that can restore the composition of the resource to the MPC standards are investigated. It is shown that the use of twostage purification of model solutions using on the first stage of the coagulation process, on the second stage, the sorption process, allows increase the cleaning efficiency up to 92. The sorption capacity of sorbents was evaluated and the factors affecting it were analyzed, the optimal conditions for the sorption process were selected depending on the conditions and nature of the objects to be cleaned.

Application of dimensional analysis in removal prediction of 2-[4-(dimethylamino) styryl]-1-methylpyridinium iodide dye using humic acid coated magnetic nanoparticle

2021 ◽  
Author(s):  
Anahita Esmaeilian ◽  
Kevin E. O'Shea
Keyword(s):  
Humic Acid ◽  
Dimensional Analysis ◽  
Concentration Ratio ◽  
Magnetic Nanoparticle ◽  
Equilibrium Concentration ◽  
Sorption Process ◽  
Dose Ratio ◽  
Initial Concentration ◽  
Liquid Systems ◽  
Isotherm Equations

<p>Numerous factors affect adsorption phenomena in solid–liquid systems. Critical factors are the sorbent dose and initial concentrations of the contaminants in the system. However, the combination of these two factors and their effects on removal prediction are largely unexplored. In this study, batch experiments were conducted to examine such effects on the adsorption of 2-[4-(dimethylamino) styryl]-1-methylpyridinium iodide cationic dye (2-ASP) in contaminated water to humic acid coated magnetic nanoparticles (HA-MNPs). Dimensional analysis and Buckingham’s π theorem were subsequently used to assess the relationship between the sorbent dose, initial concentration, and percent removal. Results of dimensional analysis along with experimental data suggest that sorbent dose and sorbate concentration ratio are the main variables controlling sorption of dye on HA-MNPs. In conventional isothermal studies, the isotherm equations are developed based on experiments of one sorbent dose which cannot be generalized for all sorbent doses.  In this study, a power function (Isotherm-like) model was obtained from the dimensional analysis that can describe precisely the sorption process of dye on HA-MNPs as a function of equilibrium concentration and sorbent dose ratio. Moreover, a relation is deduced for prediction of removal percent as a function of sorbent dose and initial concentration ratio with R<sup>2</sup> of 0.98.</p><p><strong>Keywords: Remediation, Dimensional analysis, Isotherm-like model, Magnetic nanoparticle, Styryl pyridinium dyes, Water treatment</strong></p>

scholarly journals Removal of Emulsified Oil from Aqueous Environment by Using Polyvinylpyrrolidone-Coated Magnetic Nanoparticles

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1993 ◽  
Author(s):  
Shao ◽  
Li ◽  
Lü ◽  
Qi ◽  
Zhang ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Surfactant Concentration ◽  
Solvothermal Method ◽  
Aqueous Environment ◽  
Food Industries ◽  
Effects Of Ph ◽  
One Step ◽  
Oily Wastewater Treatment ◽  
Neutral Conditions ◽  
Demulsification Efficiency

In recent years, a large amount of emulsified oily wastewaters were produced from petroleum and food industries, resulting in severe environmental problems. In this study, a series of polyvinylpyrrolidone (PVP)-coated Fe3O4 magnetic nanoparticles (MNPs) were prepared via one-step solvothermal method by introducing various amounts or types of PVP. The synthesized MNPs were characterized by multiple techniques, and their demulsification performances were evaluated in petrochemical and vegetable oil wastewaters, respectively. Results showed that the introduction of PVP in solvothermal process could significantly enhance the demulsification efficiency of MNPs, although excessive addition of PVP could not further increase its efficiency. Moreover, the effects of pH, surfactant concentration of wastewater, and the recycle number of MNPs on the demulsification performance were investigated in detail. It was found that the demulsification efficiency decreased with the increase of pH and surfactant concentration, and the synthetic MNPs were still effective after being reused for 5 cycles under acidic and neutral conditions. It is expected that the development of the PVP-coated MNPs can provide a simple and powerful route for the oily wastewater treatment.

scholarly journals Impact of Gadolinium on the Structure and Magnetic Properties of Nanocrystalline Powders of Iron Oxides Produced by the Extraction-Pyrolytic Method

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4147
Author(s):  
Vera Serga ◽  
Regina Burve ◽  
Mikhail Maiorov ◽  
Aija Krumina ◽  
Ramūnas Skaudžius ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Thermal Treatment ◽  
Iron Oxides ◽  
Caproic Acid ◽  
Transformation Process ◽  
Nanocrystalline Powders ◽  
Preparation Conditions ◽  
Oxide Phases

Interest in magnetic nanoparticles is primarily due to their practical use. In this work, for the production of nanocrystalline powders of pure and gadolinium doped iron oxides, the extraction-pyrolytic method (EPM) was used. As a precursor, either iron-containing extract (iron (III) caproate in caproic acid) or its mixture with gadolinium-containing extract (gadolinium (III) valerate in valeric acid) was used. The mixed precursor contained 0.5 mol %, 2.5 mol %, 12.5 mol %, 50 mol %, and 75 mol % gadolinium in relation to the iron content. The formation of iron oxide phases, depending on the preparation conditions, was investigated. According to the results obtained, it was demonstrated that the presence of more than 2.5 mol % gadolinium additive in the mixed precursor inhibits the magnetite-to-hematite transformation process during thermal treatment. Produced samples were characterized by XRD and SEM methods, and the magnetic properties were studied.

Development of Adsorbent from Banana Peel for Wastewater Treatment

2012 ◽  
Vol 248 ◽  
pp. 310-315 ◽  
Author(s):  
Jimoh Abdulfatai ◽  
Abdulkareem Ambali Saka ◽  
Ayo Samuel Afolabi ◽  
Onazi Micheal
Keyword(s):  
Particle Size ◽  
Contact Time ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Environmental Water ◽  
Sorption Process ◽  
Zinc Ion ◽  
Banana Peel ◽  
Chromium Ion ◽  
Effects Of Ph

This study investigated the development and application of banana peel for the remediation of heavy metals (Pb, Zn and Cr). Batch experimental processes as well as conditions that might influence the sorption of the metals were investigated. These conditions include effects of pH, contact time, adsorbent dose, and particle size. The applicability of the sorption process was tested on wastewater. The adsorbent activated with 0.5 M H2SO4 showed the highest percentage removal of chromium ion (88.9 %) at a pH of 6. It has been found that particle size has no effect on the removal of zinc ion and it has also been found that the removal efficiency of lead and chromium ion decreased with increase in contact time and particle size. Also, it can be seen from the results that untreated banana peel waste increases the biochemical oxygen demand (BOD) and chemical oxygen demand (COD) values of wastewater. The results from the optimized method revealed the applicability of the method to environmental water samples. This study therefore confirms that banana peel is a promising adsorbent for the removal of chromium from industrial effluent.

Enhanced Removal of Dissolved Humic Acid from Water Using Eco‐Friendly Phenylalanine‐Modified‐Chitosan Fe 3 O 4 Magnetic Nanoparticles

2020 ◽  
Vol 5 (14) ◽  
pp. 4285-4291
Author(s):  
Shujun Wang ◽  
Enze Li ◽  
Yazhuo Li ◽  
Jianfeng Li ◽  
Zhiping Du ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Humic Acid ◽  
Modified Chitosan

scholarly journals Adsorption of humic acid on mesoporous carbons prepared from poly- (ethylene terephthalate) templated with magnesium compounds

2012 ◽  
Vol 14 (4) ◽  
pp. 95-99 ◽  
Author(s):  
Justyna Karolczyk ◽  
Sylwia Mozia ◽  
Antoni W. Morawski ◽  
Jacek Przepiórski
Keyword(s):  
Humic Acid ◽  
Water Adsorption ◽  
Ethylene Terephthalate ◽  
Porous Carbons ◽  
Preparation Conditions ◽  
Poly Ethylene Terephthalate ◽  
Magnesium Compounds ◽  
Textural Parameters ◽  
Poly Ethylene

Abstract Porous carbons obtained from poly(ethylene terephtalate) contained in a mixture with either MgCO3 or Mg(OH)2 were examined as adsorbents for removal of humic acid from water. Adsorption of the model contaminants is discussed in relation to the textural parameters of the obtained carbon materials. Pore structure parameters of the carbonaceous materials were strongly influenced by preparation conditions including temperature and relative amounts of the inorganics used during preparations as template. Porous carbons prepared revealed a potential to purify water from the model contaminant of high molecular weight. The results presented confirmed a key role of mesoporosity in the adsorption of humic acid. Fluorescence spectroscopy was confirmed to be an useful method to evaluate concentration of humic acid in water.

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