Papers by Hossein Kazemian
Nanomaterials, Jul 31, 2021
Lithium-selenium (Li-Se) batteries are a promising energy storage system in electric vehicles due... more Lithium-selenium (Li-Se) batteries are a promising energy storage system in electric vehicles due to their high capacity and good kinetics. However, the shuttle effect issue, caused by polyselenide dissolution from the Se cathode, has hampered the development of Li-Se batteries. Herein, we developed a facile preparation of porous carbon from a metal-organic framework (MOF) to confine Se (Se/CZIF) and protect the Se/CZIF composite with an alucone coating by molecular layer deposition (MLD). The optimal alucone coated Se/CZIF cathode prepared exhibits a one-step reversible charge/discharge process in the carbonate electrolytes. The inhibition of polyselenide dissolution is credited with the improved electrochemical performance, formation of thin and stable solid electrolyte interphase (SEI) layers, and a reduction in charge transfer resistance, thus improving the overall performance of Li-Se batteries.
Microporous and Mesoporous Materials, Dec 1, 2018
Isotherms are of paramount importance for the interpretation of adsorption and ion exchange mecha... more Isotherms are of paramount importance for the interpretation of adsorption and ion exchange mechanisms, and the design of separation and catalytic processes. Although the literature on sorption isotherms is rich, most of experiments and models employed are limited to systems that obey simple equilibrium isotherms, such as linear, favorable or unfavorable types. This paper deals with the rather overlooked S-shaped isotherms and their dimensionless forms, which is of great importance for modeling of separation processes and interpretation of equilibrium data. A review on the physical significance and applications of S-shaped isotherms in adsorption and ion exchange process is also presented.
Korean Journal of Chemical Engineering, 2008
Synthesis NaY zeolite using natural kaolin (Si/Al ratio~1) as an alternative source for silica an... more Synthesis NaY zeolite using natural kaolin (Si/Al ratio~1) as an alternative source for silica and alumina is still challlenging. The aims of this study is to find out an effective and enviromentally friendly route to synthesis NaY zeolite from different source of silica and alumina. Pre-treatment kaolin like purification and fragmentation were conducted in order to reducing major impurity in kaolin such as quartz. Activation kaolin by Sub-Molten Salt System (SMS) using NaOH was employed because structure of Si-O and Al-O are inert and inactive. The kaolin was produced then used to synthesis NaY zeolite through hydrothermal method with a seeding technique using the mole ratio of (seed gel (5% of Al): 10,67Na2O: Al2O3: 10SiO2: 180H2O) [1]. In order to find out optimum condition, the variation of crystallization time was performed. By the various characterization technique, the experimental result reported that NaY zeolite has the structure with mesoporous pore 3.6 nm and Si/Al ratio 3.8.
Modeling of the PM10 pollutant health effects in a semi-arid area: a case study in Zabol, Iran
Modeling Earth Systems and Environment, 2020
Abstract This study investigated the short-term effects of exposure particulate matter (PM 10 ) i... more Abstract This study investigated the short-term effects of exposure particulate matter (PM 10 ) in Zabol, Iran, from 2013 to 2015. The concentrations of PM 10 recorded from 2013 to 2015 were given as the input to the software (AirQ 2.2.3) developed by the World Health Organization (WHO) to estimate the attributed proportion of the health effects and the number of excess cases related to total mortality (TM), cardiovascular mortality (CM), respiratory mortality (RM), hospital admissions due to cardiovascular disease (HACD), and hospital admissions due to respiratory disease (HARD). According to the data, 73 days during 2013–2014 and 144 days during 2014–2015 in Zabol exceeded the National Ambient Air Quality Standards (NAAQS) guideline limits. This finding indicates the impact of the windy period on the ambient air condition of Zabol’s airshed. Moreover, the number of excess cases attributed to TM, CM, RM, HACD, and HARD per 100,000 people was estimated as 182, 96, 18, 94, and 243 individuals during 2013–2014. However, these values increased by about 50% during 2014–2015. This significant level of health effects of PM 10 on the residents of Zabol necessitates urgent controlling/management actions to reduce dust storms in this region. Graphic abstract
Impact of design parameters on the performance of non-thermal plasma air purification system
Chemical Engineering Journal, Oct 1, 2016
Abstract In this study, a dielectric barrier discharge (DBD) non-thermal plasma experimental set-... more Abstract In this study, a dielectric barrier discharge (DBD) non-thermal plasma experimental set-up is utilized to investigate the effect of design parameters including the configuration and type of electrodes as well as the size of the reactor on the energy consumption and the rate of ozone generation. Results show that increasing the residence time by applying a larger length of the inner electrode causes an earlier plasma ignition, as well as formation of larger amounts of ozone for a given specific input energy (SIE). Changing the configuration and the type of the ground electrode shows that this electrode configuration is a dominant parameter for enhancing the energy yield in the plasma reactor. Furthermore, it was noted as the size of the reactor is increased, by increasing the gap between the electrodes, higher level of SIE is needed to reach the same level of ozone concentration.
Reviews in Aquaculture, Feb 26, 2016
Zeolites are microporous crystalline hydrated aluminosilicates, which have found various applicat... more Zeolites are microporous crystalline hydrated aluminosilicates, which have found various applications because of their very unique physicochemical characteristics such as ion exchange and adsorption-desorption properties. Significant progress has been made in recent years on applications of these inorganic adsorbents in different industries including agriculture, aquaculture, water and wastewater treatment, air purification and petrochemicals. This review article intends to summarize the published reports on the applications of natural, synthetic and modified zeolites in aquaculture industry. Application of zeolitic materials for water quality improvement of fish farms and fish transportation tanks by selective capturing of ammonia and toxic heavy metals and zeolite application as feed additive to enhance fish growth and promote their health and nutritional parameters are the most important discussed areas. According to the technical data that are discussed in this review, natural and synthetic zeolites should be considered as materials with tremendous potential of applications in the aquaculture industry. Considerable amounts of research works are under way to explore other opportunities for application of zeolites to benefit aquaculture industry.
Chemical Engineering & Technology, Dec 6, 2016
This article has been accepted for publication and undergone full peer review but has not been th... more This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the final Version of Record (VOR). This work is currently citable by using the Digital Object Identifier (DOI) given below. The final VoR will be published online in Early View as soon as possible and may be different to this Accepted Article as a result of editing. Readers should obtain the final VoR from the journal website shown below when it is published to ensure accuracy of information. The authors are responsible for the content of this Accepted Article.
Chemical Engineering Communications, Jun 19, 2019
The Na-P1 zeolite was produced from coal fly ash and modified with different environmental friend... more The Na-P1 zeolite was produced from coal fly ash and modified with different environmental friendly surfactants. The potential of these green modified zeolites was investigated as adsorbents for Cr(VI) ions in a batch system. XRD, SEM, XRF, and ICP-AES analyses were used for the characterization of raw materials and zeolite samples. The environmental friendly modified zeolites successfully immobilized different toxic elements in their framework inhibiting the transfer of these toxic elements to the surrounding liquid phase. The effects of various operational parameters on Cr(VI) removal were studied. The Hexamethylenediamine (HDTMA) and Ammonyx KP (KP) modified zeolites had larger chromium removal potential than the other samples at all temperatures. The effectiveness of Cr(VI) ions elimination became greater as the pH decreased and the adsorbent dose increased. The Freundlich, Langmuir, and Dubinin-Radushkevich isotherms were fitted to the equilibrium data. The Dubinin-Radushkevich and Langmuir models gave a better fitness to equilibrium data of HDTMA-Na-P1 and KP-Na-P1, respectively. The positive and high DH values showed the endothermic nature of the total Cr(VI) sorption procedure and indicated that Cr(VI) adsorption onto HDTMA-Na-P1 and KP-Na-P1 is a chemisorption. The negative DS values also showed that chromium ions were stable on the surface of adsorbents. The adsorption potential of the developed eco-friendly KP-Na-P1 was higher than those of other adsorbents reported in the literature.
Chemical Engineering & Technology, 2016
This article has been accepted for publication and undergone full peer review but has not been th... more This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the final Version of Record (VOR). This work is currently citable by using the Digital Object Identifier (DOI) given below. The final VoR will be published online in Early View as soon as possible and may be different to this Accepted Article as a result of editing. Readers should obtain the final VoR from the journal website shown below when it is published to ensure accuracy of information. The authors are responsible for the content of this Accepted Article.
Microwave Synthesis Porous Zeolitic Metal–Organic Framework Materials
Microwave Engineering of Nanomaterials, 2016
Chemical Engineering Journal, Apr 1, 2017
In this study, three metal organic frameworks (MOFs), MIL-101, MIL-53 and CPM-5 are synthesized a... more In this study, three metal organic frameworks (MOFs), MIL-101, MIL-53 and CPM-5 are synthesized and characterized. Adsorption isotherms and breakthrough behaviors of these MOFs are studied for two volatile organic compounds: toluene and isobutanol. Also, the effect of the presence of relative humidity on the adsorption capacity of one (1) ppm toluene and isobutanol on each MOF is investigated. Results demonstrate a superior capacity of MIL-101 for adsorption of these organic compounds in dry air. The presence of relative humidity (30%), however, decreases this adsorption capacity by 80%. MIL-53 shows the highest adsorption capacity of toluene and isobutanol at this level of humidity, while CPM-5 shows the least adsorption capacity for both toluene and isobutanol at both dry and humid air.
Synthesis of zeolite Na-P from coal fly ash by thermo-sonochemical treatment
Fuel, 2016
Abstract Coal fly ash (CFA) was transformed to Na-P zeolite (CFA-ZP) experimentally at atmospheri... more Abstract Coal fly ash (CFA) was transformed to Na-P zeolite (CFA-ZP) experimentally at atmospheric pressure and low temperature (∼100 °C) via conventional hydrothermal heating followed by sonochemical energy in 4 h. The synthesized products were characterized using XRD, TGA/DTA, SEM, PSD, and BET techniques and CEC method. The effect of ultra-sonication time on crystallinity of the synthesized zeolite was studied. Crystallinity of Na-P zeolite as high as 87% was achieved at the optimum experimental conditions of NaOH/CFA of 0.27 and 1 h conventional heating followed by 3 h ultrasound irradiation. Experimental results revealed that sonochemical treatment shortened the crystallization time from 24 h to 4 h. Increasing the conventional heating time and decreasing the ultra-sonication time resulted in a lower crystallinity of the synthesized zeolite.
Arabian Journal of Chemistry, 2017
Magnesium/aluminum layered double hydroxide (LDH) nanoparticles were synthesized by hydrolyzing u... more Magnesium/aluminum layered double hydroxide (LDH) nanoparticles were synthesized by hydrolyzing urea and used to remove metronidazole (MN) from aqueous solution. The surface morphology images of the LDH nanoparticles showed that the adsorbent surface consisted of hexagonal nanosheets with a diameter of 200-1000 nm. The MN removal efficiency was strongly dependent on the solution pH ranging from 3 to 9. The addition of nitrate, sulfate, and carbonate did not remarkably affect MN adsorption, while hardness slightly improved MN removal efficiency. The adsorption isotherm data could be well described using the Sips equation. The analysis of kinetic data showed that the adsorption of MN onto LDH closely followed the Avrami model and that several kinetic processes may control the rate of sorption. The adsorption process was non-spontaneous and exothermic in nature. The maximum Langmuir adsorption capacity was 62.804 mg/g, demonstrating that LDH is an efficient adsorbent that can be used for the removal of MN compounds.
Iranian Journal of Health and Environment, 2010
Abstract: Backgrounds and Objectives: Hexavalent Chromium is an important contaminant in surface ... more Abstract: Backgrounds and Objectives: Hexavalent Chromium is an important contaminant in surface and ground waters and removal from contaminated water and waste water has received interest in recent years. Modified Zeolite with cationic surfactant can remove Cr (VI) from contaminant water. The aim of this research is investigation of Cr (VI) removal from aqueous solutions and its effective parameters by using Modified Zeolite with cationic surfactant. Materials and Methods: In this research the efficiency Of Cr (VI) removal and ...
Journal of Environmental Chemical Engineering, 2017
Highlights Zeolite LTA synthesized from coal fly ash, CFA-ZA is proposed for mercury removal. ... more Highlights Zeolite LTA synthesized from coal fly ash, CFA-ZA is proposed for mercury removal. Removal efficiency of CFA-ZA towards mercury is comparable with activated carbon. Adsorption of mercury by CFA-ZA follows a pseudo-second-order kinetic model. Freundlich isothermal model best explains the adsorption isotherms. Both physisorption and chemisorption take place in the adsorption mechanism.
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2020
Günümüzde nefret söyleminin en çok üretildi i ve dola ıma sokuldu u mecralardan biri yeni medyadı... more Günümüzde nefret söyleminin en çok üretildi i ve dola ıma sokuldu u mecralardan biri yeni medyadır. Yeni medyanın katılımcı, kullanıcı türevli ve âdem-i merkeziyetçi yapısı, onu geleneksel medya kar ısında ayrıcalıklı ve üstün bir konuma yerle tirirken, nefret söyleminin de yaygın ve denetimsiz bir ekilde üretilmesine olanak tanımaktadır. Bu çalı mada, Türkiye'nin en çok kullanılan sosyal medya a larından biri olan Ek i Sözlük'te üretilen ve payla ılan nefret söylemi ele alınmaktadır. Temmuz 2014'te srail tarafından Gazze'ye yapılan askeri operasyon sonrasında Türkiye'de artan Yahudi kar ıtlı ı çerçevesinde Ek i Sözlük'te Yahudilere yönelik nefret söylemi incelenmi tir. Çalı manın amacı, Ek i Sözlük özelinde yeni medyadaki yaygın nefret söylemine dikkat çekmek; internette kullanıcı yorumlarının yöneldi i ki i ya da grubu a a ıladı ını, ötekile tirdi ini, hatta nefret suçuna hedef gösterdi ini ortaya koymaktır.
Appareil et Procédés D’Épuration et D’Enrichissement en Oxygène De L’Air
Mtbe Biodegradation by Microbial Consortium
Performance promotion and its mechanism for n-hexane removal in a lab-scale biotrickling filter with reticular polyurethane sponge under intermittent spraying mode
Process Safety and Environmental Protection, 2021
Abstract Mass transfer limitations commonly challenge biofiltration for n-hexane emissions due to... more Abstract Mass transfer limitations commonly challenge biofiltration for n-hexane emissions due to its high hydrophobicity. In this study, a bench-scale biotrickling filter (BTF) packed with reticulated polyurethane sponge was evaluated for n-hexane removal at various organic loading rates (OLRs) (ranging from 15 to 60 g m−3 h-1) and gas empty bed contact times (EBCTs) (ranging from 30 to 7.5 s). The obtained results show that the designed BTF can effectively remove n-hexane under intermittent spraying mode of the nutrient solution and the reticulated configuration of the packing media, which resulted in the spatial development of mycelium and enhanced mass transfer of n-hexane. The mean maximum removal efficiencies (REs) of n-hexane were 92.6 ± 0.9 %, 86.7 ± 4.8 %, and 63.8 ± 3.3 % under the OLRs of 15.67, 30.20, and 61.59 g m−3 h-1, respectively. When the BTF was operated under gas EBCTs of 30, 15, and 7.5 s, average REs of 85.9 ± 5.7 %, 44.8 ± 6.3 %, and 31.2 ± 2.5 % were achieved. The BTF also showed a superior fluctuation resistance capability and prevented excessive biofilm accumulation due to the reticular configuration of the polyurethane sponge. Results present in this study could provide an alternative consideration for the practical industrial application in treating hydrophobic VOC like n-hexane.
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Papers by Hossein Kazemian