Article
Environmental Sciences
Zirui Wang, Xiaowei An, Peifen Wang, Xiao Du, Xiaogang Hao, Xiaoqiong Hao, Xuli Ma
Summary: In this study, aluminum (Al) was used as the sacrificial anode to investigate the Cl- removal mechanism by electrocoagulation. The research showed that electrocoagulation technology can reduce the Cl- concentration in the aqueous solution below 250 ppm, meeting the emission standard. The removal mechanism of Cl- involves co-precipitation and electrostatic adsorption by forming chlorine-containing metal hydroxyl complexes. The current density and plate spacing have an impact on the efficiency of Cl- removal and the operation cost. The coexistence of magnesium ion (Mg2+) promotes Cl- removal, while calcium ion (Ca2+) inhibits it. Coexisting anions such as fluoride ion (F-), sulfate (SO42-), and nitrate (NO3-) affect the removal of Cl- ions through competitive reactions. This work provides a theoretical basis for the industrialization of Cl- removal by electrocoagulation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Peng Zhao, An Wang, Ping Wang, Zhen Huang, Zhanyong Fu, Zhanbin Huang
Summary: Humic acid is a promising remediation agent for removing heavy metals from contaminated water and soil. This study focused on the adsorption and immobilization characteristics of Pb(II) by coal-based and bio-based humic acids (CHA and BHA) in water and soil. The results showed that CHA and BHA had highly efficient Pb(II) adsorption capacities and immobilization effects, mainly through ion exchange, surface complexation, and electrostatic attraction mechanisms. This suggests that CHA and BHA could be used as green and efficient adsorbents for the removal and immobilization of Pb(II) from wastewater and soil.
Article
Environmental Sciences
Yawen Sun, Yuzhen Pan, Zhe Zhang, Zhen Chen, Jiali Wang, Baodong Wang, Zihong Cheng, Wei Ma
Summary: Protein-like substances and humic substances are the main components of natural organic matter (NOM) produced by biochemical reactions after disinfection of Zooplankton. To eliminate interference in fluorescence detection of organic matter in natural water, a clustered flower-like AlOOH sorbent was prepared. The sorbent can selectively adsorb humic acid (HA) from mixed solutions and restore the fluorescence properties of tryptophan and tyrosine. A stepwise fluorescence detection strategy was developed and successfully applied to natural water with Zooplankton Cyclops to overcome fluorescence quenching interference.
Article
Environmental Sciences
Fatemeh Rajaei, Ensiyeh Taheri, Sousan Hadi, Ali Fatehizadeh, Mohammad Mehdi Amin, Nasim Rafei, Saeid Fadaei, Tejraj M. Aminabhavi
Summary: The application of alternating current in electrocoagulation and activation of persulfate (AEC-PS) was evaluated for effective removal of humic acid (HA) from aqueous solution. The highest HA removal efficiency obtained was 99.4% under specific conditions, with factors like pH, reaction time, and current density influencing the process. Radical scavenger tests indicated that both center·OH and SO4 center·- radicals played a significant role in HA removal, with the latter contributing more effectively.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Tong -fang Jing, Da-xia Zhang, Yan Jin, Guo-dong Si, Bei-xing Li, Wei Mu, Feng Liu
Summary: This study aimed to uncover the sorption drivers of avermectin B1a and its derivatives in distinct soil samples. Avermectin B1a exhibited extensive and irreversible sorption in soil, with significantly stronger sorption than the derivatives. The main sorption site for avermectin B1a in soil was determined to be the -OH pharmacophore. Further tests on humic acid fractions showed that avermectin B1a sorbed most extensively, indicating that the -OH pharmacophore remains the main site for sorption by humic acid fractions. Hydrogen bonding was identified as the main sorption mechanism. This study highlights the potential sorption mechanisms of pharmacophores in pesticide compounds with humic acid fractions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Zhenlian Qi, Teik-Thye Lim, Shane A. Snyder, Shijie You, Faqian Sun, Taicheng An
Summary: This study investigated the impact of Ca2+ on the performance of an iron-based electrocoagulation system and found that an appropriate Ca2+ concentration significantly improved the efficiency of the concomitant electro-Fenton reactions, leading to enhanced degradation of organic pollutants.
Article
Chemistry, Multidisciplinary
Xiongxin Peng, Shuang Gai, Kui Cheng, Fan Yang
Summary: The study conducted hydrothermal humification kinetics experiments using corn straw as raw material and employed characterization techniques such as ultra-performance liquid chromatography, nuclear magnetic resonance spectroscopy, and Fourier-transform ion cyclotron resonance mass spectrometry to determine the formation mechanism of artificial humic substances (A-HS). The results showed that in an alkaline environment, rapid dissociation of lignocellulose can occur, with cellulose and hemicellulose being hydrolyzed into glucose and xylose, further dehydrated to form 5-hydroxy furfural and furfural, and then rehydrated to synthesize levulinic acid and other small molecular acids. These small precursors then combine with lignin fragments to form fulvic acids, humic acids, and even humin. The proposed mechanism of hydrothermal humification is of great significance for the design, synthesis, and application of A-HS in sustainable agriculture.
Article
Environmental Sciences
Peipei Song, Chengye Sun, Jun Wang, Shiyun Ai, Shujun Dong, Jie Sun, Shuai Sun
Summary: In this study, a combined electrooxidation and electrocoagulation (EO-EC) reactor was used to treat Cu-EDTA wastewater, with parameters like current density, electrolyte, and NaCl concentration found to affect the treatment efficiency. Under specific conditions, high Cu-EDTA removal efficiency was achieved, possibly through the generation of various oxidation and mineralization products. Overall, the EO-EC process proved to be an effective method for treating Cu-EDTA contaminated wastewater.
Article
Engineering, Environmental
B. Rahul Krishna, S. Bhuvaneshwari, Femin Majeed, S. P. Aravind
Summary: The performance and applicability of alloy electrodes derived from Al and Cu combinations were evaluated for dairy wastewater treatment. The study found that the AC10 alloy electrode showed higher efficiency in removing turbidity and COD in dairy effluent, with a shorter reaction time and minimal electrode loss.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Mrinal Roy, Case M. van Genuchten, Luuk Rietveld, Doris van Halem
Summary: Arsenic is a toxic element found in many groundwater sources around the world. Traditional removal techniques often require chemical treatment, but a novel bio-FeEC system was developed in this study, which effectively removes arsenic without the need for chemicals.
Article
Environmental Sciences
Yongchao Zhou, Wenxin Zheng, Wenming Zhang, Yiping Zhang, Lei Fang
Summary: In this study, electrocoagulation (EC) with composite scrap iron and manganese filings as an anode (Fe-Mn EC) was investigated for the efficient removal of pentavalent antimony (Sb(V)). The results showed that Fe-Mn EC enhanced the removal of Sb(V) by 11.18-17.36% compared to traditional iron electrocoagulation (Fe EC). The removal rate of Sb(V) increased with the current concentration and Mn content in the anode, but was inhibited when the Mn content exceeded 20%. Analysis of the flocs generated during Fe and Fe-Mn EC revealed that the Fe-Mn flocs had a higher Sb(V) adsorption rate and capacity compared to Fe flocs, with a structure of nanometer flakes and large internal surface areas. Thermodynamics constants indicated that adsorption was associated with monolayer physical adsorption. This study provides a new idea and potential technical support for the removal of Sb(V) by introducing composite scrap iron-manganese as an anode in electrocoagulation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Yi Wang, Lihu Liu, Xiong Yang, Steven L. Suib, Guohong Qiu
Summary: In this study, zero-valent iron was electrochemically oxidized to magnetic iron oxides, which showed high efficiency in removing As(V) from mining wastewaters. The results from simulated and actual wastewater experiments demonstrated that magnetic iron oxides, mainly magnetite and maghemite, had good adsorption capacity for As(V) and could achieve solid-liquid separation under a magnetic field. The removal ratio of As(V) was influenced by the potential and initial pH, and the presence of Cl- significantly enhanced the removal effect.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Patricia Merdy, Jean-Dominique Meunier, Fabio Ziarelli, Yves Lucas
Summary: The chemistry of silicon in the soil-water-plant continuum is not fully understood. Some data suggests that silicon has interactions with natural organic matter, contrary to the widely accepted belief. Batch experiments were conducted to investigate the potential interaction between natural organic matter and silicon, involving different pH and silicon concentrations. The results showed that natural organic matter, specifically humic acid, weakly interacts with silicon alone, but forms a ternary complex with aluminum in the presence of aluminum. These complexes have implications on pedogenesis and the toxicity control of aluminum towards plants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Yu Hu, Li Zhou, Jia Zhu, Jingsi Gao
Summary: This study investigated the removal of polyamide microplastics from wastewater using electrocoagulation. The combination of iron anode and aluminum cathode (Fe-Al) exhibited the highest removal efficiency. The removal efficiency of microplastics increased with higher applied voltage and electrolyte concentration. The optimized conditions for polyamide removal were using Fe-Al electrodes, with a plate spacing of 2.5 cm, an applied voltage of 10 V, an initial pH of 7, and an electrolyte concentration of 0.02 mol/L. This study highlights the potential of electrocoagulation for microplastics removal and provides insights for operational parameter optimization.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Nazeri Abdul Rahman, Allene Albania Linus, Calvin Jose Jol, Nur Syahida Abdul Jalal, Chieng Kwong Ming, Wan Wafi Shahanney Wan Borhan, Nooranisha Baharuddin, Shaleen Nur Ain Samsul, Nurshazatulaini Abdul Mutalip
Summary: The study investigates the treatment of peat water using a continuous electrocoagulation system with aluminum electrodes. It finds that the variable kinetic order (VOK) model combined with the Freundlich isotherm model is the most suitable for predicting the removal of impurities from peat water. This study demonstrates the effectiveness of using VOK-Freundlich kinetic model in treating peat water with a continuous electrocoagulation system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Biochemical Research Methods
Abdelkrim Rebiai, Hadia Hemmami, Soumeia Zeghoud, Bachir Ben Seghir, Imane Kouadri, Laouini Salah Eddine, Noureddine Elboughdiri, Saad Ghareba, Djamel Ghernaout, Nadir Abbas
Summary: This paper provides a concise review of the application of chemometrics in solving the uncertainty of herbal medicine authentication over the past two decades. The results show that these methods have played an important role in the quality control and authentication of herbal medicines.
COMBINATORIAL CHEMISTRY & HIGH THROUGHPUT SCREENING
(2022)
Article
Engineering, Chemical
Amel Kouache, Abdellah Khelifa, Hocine Boutoumi, Saad Moulay, Amira Feghoul, Brahim Idir, Salaheddine Aoudj
Summary: The study demonstrated the effectiveness of Inula viscosa leaf extract as a corrosion inhibitor for X70 carbon steel in 1 M HCl, with inhibition efficiency exceeding 92% at a concentration of 600 mg L-1. The adsorption of the green inhibitor onto the steel surface, mixed-type behavior, and stability of the inhibitor layer were key factors contributing to its excellent performance. Analysis of the protective film formed by the inhibitor, reduction of surface roughness, and quantum chemical parameters calculated for the plant extract components using DFT further supported the findings.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ghulam Abbas Ashraf, Raqiqa Tur Rasool, Rafiqat Ul Rasool, Muhammad Farooq Saleem, Jazib Ali, Djamel Ghernaout, Muhammad Hassan, Ahmed Muteb Aljuwayid, Mohamed A. Habila, Hai Guo
Summary: Heterojunction of MoO3@ZrO2 nanocomposite was found to be more efficient in the catalytic degradation of diclofenac sodium compared to single-metal oxide counterparts. The nanocomposite showed a high degradation rate in simulated light/ PMS, with significantly faster degradation compared to ZrO2 and MoO3. The MoO3@ZrO2 nanocomposite exhibited high stability and recycling capabilities, making it a promising candidate for visible light-based water purification solutions.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Razika Mecheri, Ammar Zobeidi, Salem Atia, Salah Neghmouche Nacer, Alsamani A. M. Salih, Mhamed Benaissa, Djamel Ghernaout, Saleh Al Arni, Saad Ghareba, Noureddine Elboughdiri
Summary: In this study, a new Kaol/Cel composite was prepared from waste red bean peels as a source of cellulose and demonstrated high adsorption capacity for crystal violet dye. The Box-Behnken design was used to optimize the adsorption process, with the best conditions resulting in 99.86% CV removal and an adsorption capacity of 294.12 mg/g. The Freundlich and pseudo-second-order kinetic models were found to best describe the adsorption behavior. The study also investigated the mechanisms behind CV removal, identifying various types of interactions involved. These findings highlight the potential of Kaol/Cel as a highly efficient adsorbent for cationic dyes in water.
Article
Chemistry, Multidisciplinary
Ammar Zobeidi, Salah Neghmouche Nacer, Salem Atia, Latifa Kribaa, Aicha Kerassa, Abasse Kamarchou, Mousa AlNoaimi, Djamel Ghernaout, Mohamed A. Ali, Abdelmajeed Adam Lagum, Noureddine Elboughdiri
Summary: This study investigates the inhibitory activity of three prepared azo compounds derived from Schiff bases on the corrosion of XC70 steel in (HCl, 1 M DMSO) medium using electrochemical measurements and density functional theory (DFT). The inhibition efficiency is directly related to the concentration. The three azo compounds derived from Schiff bases show maximum inhibition efficiency of 64.37%, 87.27%, and 55.47% for C1, C2, and C3, respectively. Tafel curves indicate that the inhibitors have a mixed but predominantly anodic inhibition system and follow a Langmuir isothermal adsorption process. DFT calculations support the observed inhibitory behavior of the compounds, and there is a strong correspondence between the theoretical and experimental results.
Article
Thermodynamics
Noureddine Elboughdiri, Djamel Ghernaout, Taseer Muhammad, Ahmed Alshehri, R. Sadat, Mohamed R. Ali, Abderrahim Wakif
Summary: A novel electromagnetic hydromagnetic dissipative second-grade nanofluid flow model is proposed to study the dynamics and thermodynamics behavior of copper-based ethylene glycol nanofluids under the influence of a horizontal electromagnetic actuator. The governing partial differential equations and boundary conditions are derived based on physical assumptions and experimental correlations. A robust generalized differential quadrature algorithm is used to solve the resulting ordinary differential equations and boundary conditions, and the influence of various factors on the flow control process and heat transport mechanism is investigated. The graphical results show that the loading process of nanoparticles has different dynamic and thermal impacts compared to the nanoparticles' diameter size, and the resistive dynamical effect of the electromagnetic actuator enhances the role of thermal radiative heat flux and Joule's heating process in the nanofluidic medium.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Raqiqa Tur Rasool, Ghulam Abbas Ashraf, Mohsin Pasha, Muhammad Farooq Saleem, Djamel Ghernaout, Mohammed M. Fadhali, Hai Guo
Summary: A novel and efficient MnSnO2@CsPbBr3 nanocomposite was successfully designed and synthesized for the activation of peroxymonosulfate under light. The nanocomposite exhibited great potential to improve light absorption and enhance the separation and transfer of photoelectron-hole pairs. The MSO@QDs nanocomposite showed high photocatalytic performance in the removal of Flurbiprofen, demonstrating its excellent ability in organic pollutant degradation through photo-oxidation. Computational investigation using the DFT method provided insights into the reactivity of the nanocomposite. This work contributes to the development of high-efficiency and low-cost photocatalysts for wastewater treatment.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Mohamed Heikal, Mohamed A. Ali, Djamel Ghernaout, Noureddine Elboughdiri, Badia Ghernaout, Hazem I. Bendary
Summary: This research investigates the long-term resilience of an environmentally friendly cement blend in a corrosive seawater environment. The findings show that cement incorporating GGBFS exhibits high durability and can withstand challenges in marine environments.
Article
Engineering, Environmental
Raqiqa Tur Rasool, Ghulam Abbas Ashraf, Mohammed M. Fadhali, Sulaiman Al-Sulaimi, Djamel Ghernaout, Moutaz Aldrdery, Abubakr Elkhaleefa, Noor Hassan, Zeeshan Ajmal, Shahzad Afzal, Hai Guo
Summary: Molybdenum carbide (Mo2C), vanadium carbide (VC), and zirconium carbide (ZrC) nanoparticles were studied as photocatalysts for the degradation of naproxen (NX) under visible light. ZrC nanoparticles exhibited higher photocatalytic properties compared to VC and Mo2C nanoparticles. The larger surface area, mesoporous structure, narrow energy bandgap, and lower recombination intensity of ZrC nanoparticles contributed to the enhanced degradation of NX. The excellent durability and reusability of ZrC nanoparticles were also demonstrated.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Adnene Midouni, Anis Chaouachi, Sami Barkaoui, Nejib Abassi, Samir Chakhari, Ammar Mahjoubi, Djamel Ghernaout, Ahmed Hichem Hamzaoui, Muhammad Imran Khan, Noureddine Elboughdiri
Summary: This study describes the enhanced photodegradation of Congo Red dye under visible light irradiation using co-doped ceria (Ce0.7La0.15Ca0.15O2-delta) prepared by colloidal solution combustion synthesis. The as-synthesized ceria nanoparticles were characterized by various techniques revealing their cubic spinel structure, average size between 23 and 92 nm, and bandgap energy from 2.69 to 2.73 eV. The photocatalytic activity of the prepared ceria was evaluated through the photodegradation of CR dye, with the highest degradation rate achieved by co-doped ceria prepared with 1.0 ml of colloidal silica. Based on the results, ceria nanoparticles have potential applications in wastewater cleaning, photocatalyst materials, UV filters, and photoelectric devices.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2023)
Article
Engineering, Environmental
Sara Irki, Edet Albright, Nachida Kasbadji Merzouk, Salah Hanini, Sami Barkaoui, Mhamed Benaissa, Djamel Ghernaout, Noureddine Elboughdiri
Summary: The provinces of Bouzareah and Ghardaia in Algeria are facing water scarcity and drought, despite differences in climatic conditions. This study aimed to design a desalination unit combined with a solar collector to meet the water needs of these provinces. By integrating a model developed in the literature into the simulation environment (TRNSYS), a new component (VMD process) was created. Results showed that Ghardaia had a higher performance in desalination compared to Bouzareah.
Article
Engineering, Chemical
Louiza Sadoun, Karima Seffah, Abdelbaki Benmounah, Abdellatif Zerizer, Djamel Ghernaout
Summary: This study aimed to evaluate the efficiency of Algerian Zean oak (AZO) sawdust for removing methylene blue (MB) without any physico-chemical treatment. By characterizing the physico-chemical properties of the AZO sawdust, the researchers optimized various parameters to achieve an adsorption capacity of 52.376 mg/g. Kinetic data and adsorption isotherms were modeled, revealing that the pseudo-second-order and Sips/Langmuir models best describe the experimental data. The thermodynamic study showed that the adsorption process of MB on AZO sawdust is spontaneous, exothermic, and favorable, highlighting its potential as an efficient and preferred alternative to activated carbon for MB removal.
DESALINATION AND WATER TREATMENT
(2023)
Article
Energy & Fuels
Ali Shawabkeh, Fatemah Alansari, Djamel Ghernaout, Noureddine Elboughdiri
Summary: The hydration process of oil shale ash at different water-to-ash weight ratios was investigated. The physical characteristics, elemental composition of particles, and crystalline phases of the ash hydrate were identified. The hydrated ash was found to contain stratlingite, ettringite, melilite, and calcium silicate hydrates. The formation of cementitious products, particularly CSH, resulted in improved mechanical properties of the hydrated ash.
Article
Construction & Building Technology
Hazem I. Bendary, Mohamed Heikal, Mohamed A. Ali, Djamel Ghernaout, Noureddine Elboughdiri
Summary: The resistance of cement structures to salts is crucial in marine environments. This study investigated the sulfate attack of ordinary Portland cement (OPC) and dealuminated kaolin (DK) blended cement. The results showed that the 7.5% (DK) blended cement exhibited the best sulfate resistant performance.
REVISTA DE LA CONSTRUCCION
(2023)
Article
Engineering, Chemical
Aicha Gasmi, Noureddin Elboughdin, Djame Ghernaout, Ahmed Hannachi, K. S. Abdel Halim, Muhammad Imran Khan
Summary: Electrocoagulation (EC) technique is efficient in removing colors and contaminations in industrial effluents, and the operational parameters significantly affect its performance. This study discusses the mechanisms of contaminant removal from wastewater and the major operating parameters, with a focus on reducing COD and colors. The economic comparison of EC with other alternatives is also conducted for process selection reference.
DESALINATION AND WATER TREATMENT
(2022)
