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Coordination Behavior and Biological Activity of Some Transition Metal Complexes with 2-Acetyl and 2-Formyl-3-Amino-1,4-Naphthoquinone Ligands

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Open Journal of Inorganic Non 2020年第2期10卷 15-29页

作者： Fatma S. M. Hassan Mahmoud Fayez Nadia Abdalla Chemistry department Faculty of Science Aswan University Aswan Egypt Luxor Company for Water and wastewater Luxor Egypt

The aim of this work is to synthesize, characterize and evaluate the biological activity of 2-acetyl and 2-formyl-3-amino-1,4-naphthoquinone (L1 - L2) and their metal-Co(II), Ni(II) and Cu(II) chelates. The newly chelates were characterized by elemental analysis, IR, mass and 1HNMR spectra, thermogravimetric analysis (TGA) and biological activity. The antibacterial and antifungal activities of the ligands and its metal complexes were screened against bacterial species (Staphylococcus aureus, Bacillus subtilis and Escherichia coli) and fungi (Candida albicans). Ampicillin and amphotericin were used as references for antibacterial and antifungal studies. The activity data show that the metal complexes have a promising biological activity comparable with parent free ligand against bacterial and fungal species.

关键词： 1 4-Naphthoquinone Transition Metal Complex Antibacterial Activity

Biorenewable materials for water remediation: The central role of cellulose in achieving sustainability

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Journal of Bioresources and Bioproducts 2024年第3期9卷 253-282页

作者： Kirti Mishra Samarjeet Singh Siwal Thandiwe Sithole Nirankar Singh Phil Hart Vijay Kumar Thakur department of Chemistry M.M.Engineering CollegeMaharishi Markandeshwar(Deemed to be University)Haryana 133207India department of Chemical Engineering University of JohannesburgDoornfontein 2088South Africa Biorefining and Advanced Materials Research Center Scotland’s Rural CollegeEdinburgh EH93JGUnited Kingdom Renewable and Sustainable Energy Research Centre Technology Innovation InstituteAbu Dhabi 9639United Arab Emirates School of Engineering University of Petroleum&Energy StudiesDehradun 248007India

As the population increases and manufacturing grows,greenhouse gas and other harmful emissions *** with chemicals such as dyes,pesticides,pharmaceuticals,oil,heavy metals or radionuclides,wastewater purification has become an urgent *** technologies exist that can remove these contaminants from wastewater sources,but they often demand high energy and/or high cost,and in some cases produce contaminant laden sludge that requires safe *** need for methods which are less capital intensive,less operationally costly and more environmentally friendly is ***-based materials have emerged as promising candidates for wastewater treatment due to their renewability,low cost,biodegradability,hydrophilicity,and antimicrobial *** this review article,we focussed on developing sustainable and biodegradable cellulose-based materials for wastewater *** article deals with cellulose-based materials’scope and their conversion into valuable products like hydrogel,aerogel,cellulose composites,and *** cellulose-based materials have no harmful environmental impact and are *** modified cellulose-based materials applying as membrane,adsorbent,sorbent,and beads to purify the wastewater were ***,the challenges and future prospects of cellulose-based materials for wastewater treatment were considered,emphasizing their potential to be sustainable and eco-friendly alternatives to traditional materials used in wastewater treatment.

关键词： Cellulose wastewater treatment Hydrogel Nanocrystal Cellulose membrane

Development of Localized Assessment of Municipal wastewater Disposal Risks

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Journal of Water Resource and Protection 2024年第6期16卷 395-413页

作者： Frederick Bloetscher Daniel E. Meeroff Brittanney Adelmann department of Civil Environmental and Geomatics Engineering Florida Atlantic University Boca Raton USA department of Mathematics Florida Atlantic University Boca Raton USA

A means to develop a comparative assessment of the risks of available wastewater effluent disposal options on a local scale needs to be developed to help local decision-makers make decisions on options such as direct or indirect potable reuse options. These options have garnered more interest as a result of water supply limitations in many urban areas. This risk assessment was developed from a risk assessment developed at the University of Miami in 2001 and Florida Atlantic University (FAU) in 2023. Direct potable reuse and injection wells were deemed to have the lowest risk in the most recent study by FAU. However, the injection well option may not be available everywhere. As a result, a more local means to assess exposure risk is needed. This paper outlines the process to evaluate the public health risks associated with available disposal alternatives which may be very limited in some areas. The development of exposure pathways can help local decision-makers define the challenges, and support later expert level analysis upon which public health decisions are based.

关键词： Potable Reuse wastewater Effluent Disposal Risk Risk Assessment

Corn and Soybean Growth as Affected by wastewater-Derived Struvite-Phosphorus Sources and Irrigation Water Types

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Agricultural Sciences 2024年第4期15卷 472-504页

作者： Machaela Morrison Kristofor R. Brye Gerson Drescher Jennie Popp Lisa S. Wood department of Crop Soil and Environmental Sciences University of Arkansas Fayetteville AR USA department of Agricultural Economics & Agribusiness University of Arkansas Fayetteville AR USA

Struvite (MgNH4PO4·6H2O) produced synthetically from a stock solution of known phosphorus (P) and nitrogen (N) concentrations has been shown to be an effective, alternative fertilizer-P source for various crops, but little is known about the potential agronomic effectiveness of struvite created from an actual municipal wastewater source. The objective of this study was to evaluate the effects of soil [i.e., Creldon silt loam (Oxyaquic Fragiudalf) and Calloway silt loam (Aquic Fraglossudalf) series], fertilizer-P source [i.e., synthetically produced electrochemically precipitated struvite (ECSTsyn), real-wastewater-derived ECST (ECSTreal), chemically precipitated struvite (CPST), monoammonium phosphate (MAP), and an unamended control (UC)], and irrigation water type (i.e., tapwater and struvite-removed wastewater) on corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] growth and N, P, and magnesium (Mg) uptake in a 60-day, greenhouse potted-plant study. Crop growth and N, P, and Mg uptakes for the struvite treatments (i.e., CPST, ECSTsyn, and ECSTreal) were generally similar to or at least 1.2 times greater than MAP. The ECSTsyn material commonly had up to five times greater N, P, and Mg uptake in corn and soybean than any other fertilizer-P source. Struvite-removed wastewater resulted in at least 1.3 times lower dry matter and N, P, and Mg uptake than tapwater. Similar corn and soybean results from the struvite fertilizers among the various soil-water type combinations compared to MAP suggest that struvite generates similar crop responses as at least one widely used, commercially available, multi-nutrient fertilizer-P source.

关键词： Arkansas Corn Production Soybean Production Struvite Recovered Nutrients

Separation of methane from different gas mixtures using modified silicon carbide nanosheet: Micro and macro scale numerical studies

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Chinese Journal of Chemical Engineering 2020年第5期28卷 1268-1276页

作者： Golchehreh Bayat Roozbeh Saghatchi Jafar Azamat Alireza Khataee Research Laboratory of Advanced Water and wastewater Treatment Processes Department of Applied ChemistryFaculty of ChemistryUniversity of TabrizTabriz 51666-16471Iran Integrated Manufacturing Technologies Research and Application Center Faculty of Engineering and Natural SciencesSabanci UniversityOrhanliTuzlaIstanbul 34956Turkey department of Basic Sciences Farhangian UniversityTehranIran department of Environmental Engineering Gebze Technical UniversityGebze 41400Turkey Institute of Research and Development Duy Tan UniversityDa Nang 550000Viet Nam

This research discusses the separation of methane gas from three different gas mixtures,CH4/H2 S,CH4/N2 and CH4/CO2,using a modified silicon carbide nanosheet(Si CNS)membrane using both molecular dynamics(MD)and computational fluid dynamics(CFD)*** research examines the effects of different structures of the Si CNSs on the separation of these gas *** parameters including the potential of the mean force,separation factor,permeation rate,selectivity and diffusivity are discussed in *** MD simulations showed that the separation of CH4/H2 S,and CH4/CO2 mixtures was successful,while simulation demonstrated a poor result for the CH4/N2 *** effect of temperature on the diffusivity of gas is also discussed,and a correlation is introduced for diffusivity as a function of *** evaluated value for diffusivity is then used in the CFD method to investigate the permeation rate of gas mixtures.

关键词： Gas separation Silicon carbide nanosheets Molecular dynamics Computational fluid dynamics

Enhancing visible-light-driven NO oxidation through molecular‐level insights of dye-loaded sea sands

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Rare Metals 2024年第2期43卷 543-554页

作者： Yu-Han Li Bang-Fu Chen Sónia A.C.Carabineiro You-Yu Duan Ping Tan Wing-Kei Ho Fan Dong Engineering Research Center for Waste Oil Recovery Technology and Equipment Ministry of EducationChongqing Key Laboratory of Catalysis and New Environmental MaterialsChongqing Technology and Business UniversityChongqing400067China Nanchang Institute of Technology Nanchang33044China LAQV-REQUIMTE Department of ChemistryNOVA School of Science and TechnologyUniversidade NOVA de Lisboa2829-516CaparicaPortugal College of Physics and Center of Quantum Materials and Devices Chongqing UniversityChongqing401331China department of Science and Environmental Studies The Education University of Hong KongHong Kong999077China

Natural minerals,abundant and easily obtained through simple physical processing,offer a cost-effective and environmentally friendly solution for dyeing wastewater disposal and air pollution *** study investigates the photocatalytic removal of NO using natural different types of dyes,loaded on natural sand,under visible light *** examining various coating concentrations of dyes and sand weights,we discovered that sand loaded with Rhodamine B(RhB)exhibits high activity for the photo-oxidation of NO.A combination results of X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared spectroscopy(FTIR)and thermogravimetric(TG)analyses confirm the presence of SiO_(2),CaCO_(3),Al_(2)O_(3)and iron oxides as the main components of the ***,studying RhB-loaded individual components reveals that CaCO_(3)plays a crucial role in enhancing the NO removal *** results and theoretical calculations demonstrate the establishment of a directional charge transfer channel from CaCO_(3)to RhB,facilitating the adsorption and activation of molecular NO and O_(2).This work not only promotes the utilization of natural mineral resources but also enriches the fields of environmental photochemistry and semiconductor photocatalysis.

关键词： Sand dyes Rhodamine B Photo-oxidation of NO Visible light illumination

A comprehensive simulation approach for pollutant bio-transformation in the gravity sewer

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Frontiers of Environmental Science & Engineering 2019年第4期13卷 179-190页

作者： Nan Zhao Huu Hao Ngo Yuyou Li Xiaochang Wang Lei Yang Pengkang Jin Guangxi Sun School of Environmental and Municipal Engineering Xi'an University of Architecture and TechnologyXi'an 710055China Centre for Technology in Water and wastewater School of Civil and Environmental EngineeringUniversity of TechnologySydneyNSW 2007Australia department of Civil and Environmental Engineering Tohoku UniversitySendaiMiyagi 980-8579Japan Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

Presently, several activated sludge models (ASMs) have been developed to describe a few biochemical processes. However, the commonly used ASM neither clearly describe the migratory transformation characteristics of fermentation nor depict the relationship between the carbon source and biochemical reactions. In addition, these models also do not describe both ammonification and the integrated metabolic processes in sewage transportation. In view of these limitations, we developed a new and comprehensive model that introduces anaerobic fermentation into the ASM and simulates the process of sulfate reduction, ammonification, hydrolysis, acidogenesis and methanogenesis in a gravity sewer. The model correctly predicts the transformation of organics including proteins, lipids, polysaccharides, etc. The simulation results show that the degradation of organics easily generates acetic acid in the sewer system and the high yield of acetic acid is closely linked to methanogenic metabolism. Moreover, propionic acid is the crucial substrate for sulfate reduction and ammonification tends to be affected by the concentration of amino acids. Our model provides a promising tool for simulating and predicting outcomes in response to variations in wastewater quality in sewers.

关键词： Gravity sewer Modeling Pollutant transformation Biochemical reaction process

Hydrolysis of polyaluminum chloride prior to coagulation:Effects on coagulation behavior and implications for improving coagulation performance

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Journal of Environmental Sciences 2017年第7期29卷 162-169页

作者： Zhongguo Zhang Jun Wang Dan Liu Jiuyi Li Xiaolin Wang Boyu Song Bing Yue Kehui Zhao Yun Song Key Laboratory of Energy-Water Conservation and wastewater Resources Recovery(Environmental Protection Research Institute of Light Industry) China National Light IndustryBeijing 100089China University of Chinese Academy of Sciences Beijing 100049China Beijing Key Laboratory of Industrial wastewater Treatment and Resource Recovery Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China department of Civil and Environmental Engineering Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality SafeguardSchool of Civil EngineeringBeijingJiaotong UniversityBeijing 100044China Beijing Water Authority Beijing 100038China Beijing Key Laboratory of Industrial Land Contamination and Remediation Environmental Protection Research Institute of Light IndustryBeijing Academy of Science and TechnologyBeijing 100089China

The effects of polyaluminum chloride（PACl） hydrolysis prior to coagulation on both the coagulation zone and coagulation performance of a kaolin suspension were investigated by a novel jar test named the ＂reversed coagulation test＂.The tests showed that PACl hydrolysis prior to coagulation decreased the performance of charge neutralization coagulation in the case of short-time slow mixing（10 min;G = 15 sec-1） and increased the optimal dosage for charge neutralization and sweep ***,the hydrolysis time had insignificant effects on the size and zeta potential of PACl precipitates and the residual turbidity of the raw ***,PACl hydrolysis prior to coagulation and the size of PACl precipitates had a negligible effect on the performance of sweep *** results imply that,in practice,preparing a PACl solution with deionized water,rather than tap water or the outlet water from a wastewater treatment unit,can significantly save PACl consumption and improve the performance of charge neutralization coagulation,while preparing the PACl solution with tap or outlet water would not affect the performance of sweep *** addition,the optimal rapid mixing intensity appears to be determined by a balance between the degree of coagulant hydrolysis before contacting the primary particles and the average size of flocs in the rapid mixing *** results provide new insights into the role of PACl hydrolysis and will be useful for improving coagulation efficiency.

关键词： Polyaluminum chloride(PACl) Precipitate Hydrolysis Charge neutralization Sweep coagulation

Effective Elimination of Hazardous Chromium (VI) Using Periodic Elements and Contemporary Adsorption Methods by Using Magnesium Ferrite Nanoparticle: A Review

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Journal of Environmental Protection 2024年第5期15卷 596-619页

作者： Nazmun Nahar Mahabub Hossain Swaron Md. Aliuzzaman Sheik Md. Jamal Uddin department of Soil and Environmental Sciences University of Barishal Barishal Bangladesh

A well-known hazardous metal and top contaminant in wastewater is hexavalent chromium. The two forms of most commonly found chromium are chromate ( CrO 4 2− ) and dichromate ( Cr 2 O 7 2− ). Leather tanning, cooling tower blow-down, plating, electroplating, rinse water sources, anodizing baths etc. are the main sources of Cr (VI) contamination. The Cr (VI) is not only non-biodegradable in the environment but also carcinogenic to living population. It is still difficult to treat Cr contaminated waste water effectively, safely, eco-friendly, and economically. As a result, many techniques have been used to treat Cr (VI)-polluted wastewater, including adsorption, chemical precipitation, coagulation, ion-exchange, and filtration. Among these practices, the most practical method is adsorption for the removal of Cr (VI) from aqueous solutions, which has gained widespread acceptance due to the ease of use and affordability of the equipment and adsorbent. It has been revealed that Fe-based adsorbents’ oxides and hydroxides have high adsorptive potential to lower Cr (VI) content below the advised threshold. Fe-based adsorbents were also discovered to be relatively cheap and toxic-free in Cr (VI) treatment. Fe-based adsorbents are commonly utilized in industry. It has been discovered that nanoparticles of Fe-, Ti-, and Cu-based adsorbents have a better capacity to remove Cr (VI). Cr (VI) was effectively removed from contaminated water using mixed element-based adsorbents (Fe-Mn, Fe-Ti, Fe-Cu, Fe-Zr, Fe-Cu-Y, Fe-Mg, etc.). Initial findings suggest that Cr (VI) removal from wastewater may be accomplished by using magnesium ferrite nanomaterials as an efficient adsorbent.

关键词： Chromium (VI) Periodic Elements Adsorption Elimination Magnesium Ferrite