In order to promote the storage and growth of potato seedlings, the antioxidant activities of potato seedlings at different storage temperatures were analyzed. The antioxidant activities of potato seedlings at two different temperatures were compared. In addition, the effects of high temperature and normal temperature on the growth phenotype and antioxidant system physiological indexes of potato seedlings were analyzed by high temperature treatment. According to the significant change characteristics of SOD activity of antioxidant index at different temperatures, the SOD genes of potato were screened and bioinformatics analysis and gene expression analysis were carried out. The results showed that high temperature inhibited the antioxidant activity of potato seedlings and affected the growth of potato seedlings. The growth of potato seedlings can be promoted in medium and low temperature environment. In the future research, the experimental results can be used as the theoretical basis for potato planting.

Lei Wang

Junlian Zhang

Chang Liu

Arash Arabmarkadeh

Antioxidant Activity of Potato Seedlings at Different Storage Temperatures

Hayat Mohammed Kebede

Adane Adugna Ayalew

Corrigendum to &#x201c;Development of Kaolin Clay as a Cost-Effective Technology for Defluoridation of Groundwater&#x201d;

This study aimed to synthesize alumina from an inorganic aluminum nitrate precursor in various binary solvent systems of ethanol and water using the sol-gel self-assembly (SSA) method, employing a triblock copolymer, pluronic P123, as the pore-directing agent. The resulting materials were implemented as a support for the cobalt (Co) catalyst in a methane dry reforming (MDR) reaction at 1073&#x2009;K under 1&#x2009;atm. Regardless of the water percentage used in the support synthesis, the methane dry reforming reaction over Co catalysts on alumina supports showed the negligible change in conversion during the 12&#x2009;h reaction. Moreover, there was evidence of large quantities of amorphous carbon and graphitic carbon on the spent catalyst surface. However, the low oxidation temperature of these deposited carbons could help maintain the balance between the carbon formation and the carbon elimination processes on the catalyst surface during the reforming reaction, hence prolonging the lifetime of the catalyst. The high conversion of methane (CH4) from 64.6&#x0025; to 82.8&#x0025; and carbon dioxide (CO2) from 70.7&#x0025; to 86.6&#x0025; for the MDR reaction over the as-prepared alumina-supported Co catalyst demonstrated a significant improvement in catalyst production for the MDR reaction from the viewpoint of large-scale applications.

My Hien Thi Bach

Ngoc Thang Tran

Thanh Nha Thi Tran

Van Cuong Nguyen

Hong Anh Thi Nguyen

Alumina Support for Cobalt Catalyst in a Methane Dry Reforming Reaction: The Role of Water Content in a Solvent Medium

The accumulation of recalcitrant azo dyes from untreated textile effluents has adversely impacted the ecosystem. The immense stability in their nature is conferred by the presence of azo bonds (N&#x3d;N) in their structure. The reduction of this azo bond occurs exclusively under anaerobic conditions giving rise to colorless aromatic amines, which are carcinogenic. In the present study, a synthetic textile effluent containing mixed azo dyes such as Reactive Red, Reactive Black, and Reactive Brown, was treated using activated sludge under anaerobic conditions in a lab-scale anaerobic sequential batch reactor (An-SBR). At a concentration of 100&#x2009;mg/L of mixed azo dyes, the An-SBR gave a maximum of 88&#x0025; decolorization detected through UV-visible spectroscopy. Physicochemical analyses revealed 73&#x0025; removal of BOD, 90&#x0025; TDS removal, 69&#x0025; COD removal, 4.05&#x0025; TKN removal, 66&#x0025; chloride removal, and 73&#x0025; hardness removal. When the concentration of dyes was increased to 500&#x2009;mg/L, the treatment showed a decrease in decolorization efficiency. This was then compared to a sequential anaerobic-aerobic treatment process performed in An-SBR and a laboratory-scale aerobic moving bed biofilm reactor (MBBR). The study revealed that the sequential process held more potential for commercial application than exclusively an anaerobic process. The metabolites formed during the treatment phase were extracted and analyzed by FT-IR and HPLC and identified through GC-MS analyses and were compared to those found in the untreated effluent. A phytotoxicity test was conducted on the remainder (secondary) sludge using Vigna unguiculata, and it was found to show a 50&#x0025; reduction in germination and retardation in root and shoot length.

Tasneem M. Kathawala

K. Veena Gayathri

P. Senthil Kumar

A Performance Comparison of Anaerobic and an Integrated Anaerobic-Aerobic Biological Reactor System for the Effective Treatment of Textile Wastewater

Compared with the common marine renewable energy sources like solar, wind, and wave energy, etc., the hydraulic pressure stored in the deep seawater can output stable and successive energy flow. Thus, it can be directly coupled with the reverse osmosis (RO) process to supply drinkable mineral water for crews of Deep Sea Space Station (DSSS). We proposed a novel submarine RO desalination system driven by the hydraulic pressure of deep seawater (SHP-RO), composed of a desalination branch to generate fresh water and a back pressure branch to ensure the depth independence of the desalination. The influences of the deep sea environment on the RO were analyzed, based on which the pretreatment of the seawater and the preparation of the drinkable mineral water were studied. The turbine-based energy recovery scheme was investigated in virtue of the CFD simulation on the flow behavior in the different turbine series. It was predicted that, when the DSSS was located at the depth of 1100&#x2009;m and the operating pressure of the RO process was 6.0&#x2009;MPa, for a drinkable water production rate of 240&#x2009;m3/d, the recovered hydraulic pressure energy can achieve 39.22&#x2009;kW&#xb7;h, which was enough for driving electricity consumers in the SHP-RO system.

Yifan Cui

Qingfen Ma

Zhongye Wu

Hui Lu

Zezhou Gao

Junqing Fan

A Hydrostatic Pressure-Driven Desalination System for Large-Scale Deep Sea Space Station

The use of renewable substrates as biosorbents has a great attention in wastewater treatment. The pomegranate peel (PGP) constitutes one of these substrates. A review is carried out to investigate the potential of pomegranate peel (PGP) for wastewater treatment. Physical and chemical PGP properties are presented and compared to those of Tunisian pomegranate peel (El Gabsi). Raw and modified PGP performance and sorption capacity for metals, dyes, and organic pollutants are evaluated. Different experimental sorption conditions such as concentration, contact time, pH, temperature, and adsorbent dose used in the literature are illustrated. Studied and best-fitted kinetics and isotherm models to experimental data and thermodynamic parameters are compared. The effects of activating physical and/or chemical conditions on the activated PGP properties are presented. This paper reveals noteworthiness properties of raw PGP for wastewater treatment compared to this activated form. The comparison between activated and raw PGP morphology exhibits that the activation does not necessarily improve the PGP adsorption capacity. Despite a limited research carried out on the raw PGP biosorbent, it appears from this study that it has very good adsorption properties, making it a serious and low-cost renewable substrate toward practical applications in wastewater treatment compared to various other waste agricultural biomass.

Samia Ben-Ali

Application of Raw and Modified Pomegranate Peel for Wastewater Treatment: A Literature Overview and Analysis

An excellent oxide ion conductivity with high oxygen transportation of lanthanum silicate apatite at the solid oxide fuel cell (SOFC) can be achieved through the solid-state reaction method. The doped La10Si6&#x2212;x&#x2212;0.2AlxZn0.2O27&#x2212;&#x3b4; (x&#x2009;&#x3d;&#x2009;0.2 and 0.4) materials sintered at 1600&#xb0;C accomplished crystallinity and crystal structure of apatite-type. The structural and electrochemical characterizations of La10Si6&#x2212;x&#x2212;0.2AlxZn0.2O27&#x2212;&#x3b4; (x&#x2009;&#x3d;&#x2009;0.2 and 0.4) were executed using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and electrochemical impedance spectroscopy (EIS) measurements. The total oxide ion conductivities of La10Si6&#x2212;x&#x2212;0.2AlxZn0.2O27&#x2212;&#x3b4; (x&#x2009;&#x3d;&#x2009;0.2 and 0.4) were measured from low to intermediate operating temperature range (450 to 800&#xb0;C) using electrochemical impedance spectroscopy. Room temperature XRD patterns of La10Si6&#x2212;x&#x2212;0.2AlxZn0.2O27&#x2212;&#x3b4; (x&#x2009;&#x3d;&#x2009;0.2 and 0.4) exhibited La10Si6O27 apatite phase with space group P63/m as the main phase with the minor appearance of La2SiO5 as an impurity phase. The highest total oxide ion conductivity of 3.24&#x2009;&#xd7;&#x2009;10&#x2212;3 Scm&#x2212;1 and corresponding activation energy of 0.30&#x2009;eV at 800&#xb0;C were obtained for La10Si5.6Al0.2Zn0.2O26.7 which contains a low concentration of Al3&#x2b; dopant.

Shammya Afroze

Hidayatul Qayyimah Hj Hairul Absah

Md Sumon Reza

Mahendra Rao Somalu

Jun-Young Park

Saeed Nekoonam

Alibek Issakhov

Abul Kalam Azad

Structural and Electrochemical Properties of Lanthanum Silicate Apatites La10Si6&#x2212;x&#x2212;0.2AlxZn0.2O27&#x2212;&#x3b4; for Solid Oxide Fuel Cells (SOFCs)

Due to the global menace caused by carbon emissions from environmental, anthropogenic, and industrial processes, it has become expedient to consider the use of systems, with high trapping potentials for these carbon-based compounds. Several prior studies have considered the use of amines, activated carbon, and other solid adsorbents. Advances in carbon capture research have led to the use of ionic liquids, enzyme-based systems, microbial filters, membranes, and metal-organic frameworks in capturing CO2. Therefore, it is common knowledge that some of these systems have their lapses, which then informs the need to prioritize and optimize their synthetic routes for optimum efficiency. Some authors have also argued about the need to consider the use of hybrid systems, which offer several characteristics that in turn give synergistic effects/properties that are better compared to those of the individual components that make up the composites. For instance, some membranes are hydrophobic in nature, which makes them unsuitable for carbon capture operations; hence, it is necessary to consider modifying properties such as thermal stability, chemical stability, permeability, nature of the raw/starting material, thickness, durability, and surface area which can enhance the performance of these systems. In this review, previous and recent advances in carbon capture systems and sequestration technologies are discussed, while some recommendations and future prospects in innovative technologies are also highlighted.

Eshorame Samuel Sanni

Emmanuel Rotimi Sadiku

Emeka Emmanuel Okoro

Novel Systems and Membrane Technologies for Carbon Capture

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International Journal of Chemical Engineering publishes research focused on technologies for the production, processing, transportation and use of chemicals on an industrial scale.

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Chief Editor, Evangelos Tsotsas, holds the Chair of Thermal Process Engineering at Otto von Guericke University Magdeburg (Germany) since 1994. The main focus of his work is on drying, and on particle formulation processes related to drying, such as spray fluidized bed agglomeration.

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International Journal of Chemical Engineering