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Assessment and characterization of the physicochemical parameters of Moroccan leachate during the confinement period (coronavirus) 摩洛哥渗滤液禁闭期(冠状病毒)理化参数的评价与表征
IF 1.1 Q3 Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/morjchem-v9i2.27594
A. Ourhedja, Y. Miyah, M. Bargach, F. Zerrouq, R. Tadili
This work was carried out to respond to a major environmental issue which is water pollution and its repercussions on receiving environments, in particular the problem of leachate in the city of Fez-Morocco. The leachates generated by many economically relevant industrial activities contain recalcitrant organic compounds that remain unchanged at the biological stage of the treatment plant, which could make it difficult to comply with the discharge standard limits currently in force. During this work, we evaluated the elements present in the leachate as well as a physicochemical characterization study such as the chemical oxygen demand (COD), the biochemical oxygen demand over 5 days (BOD5), the pH, the electrical conductivity, the total phosphorus, the ammonium, suspended matter, and heavy metals, before and during the period of coronavirus containment.
开展这项工作是为了应对一个主要的环境问题,即水污染及其对接收环境的影响,特别是摩洛哥非斯市的渗滤液问题。许多与经济相关的工业活动产生的渗滤液中含有难降解的有机化合物,这些化合物在处理厂的生物阶段保持不变,这可能会使其难以达到目前有效的排放标准限制。在这项工作中,我们评估了渗滤液中存在的元素,并进行了物理化学特征研究,如化学需氧量(COD)、5天生化需氧量(BOD5)、pH、电导率、总磷、铵、悬浮物和重金属,在冠状病毒控制之前和期间。
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引用次数: 1
Fundamental concepts and chemical representations on sea pollutant migration: can it be improved through RADEC 海洋污染物迁移的基本概念和化学表征:能否通过RADEC加以改进
IF 1.1 Q3 Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27585
A. Sujana, R. Sukardi, M. Rosbiono, W. Sopandi
The purpose of this research is to improve the fundamental concept and chemical representation of sea pollutant migration through the implementation of the RADEC learning model. Pollutants are solved, ionized, even hydrolyzed in the sea. The research employed a quasi-experimental design with a one-group pre-test and post-test design. The used instrument was four-tier diagnostic tests. It was used to see the improvement of students' fundamental concept and chemical representation on the sea pollutant migration concept. At the end of the class, most of the students' level was lack of knowledge 1 even scientific conception. The statistical data showed there was a significant mean difference between the students' pre-test and post-test, It clearly stated RADEC learning model gave an impact on students’ level of fundamental concepts and chemical representation. The improvement caused by the worksheet. It inspired students to create waste filters or chemical products that can absorb waste in the ocean even created sub-microscopic representations.
本研究的目的是通过RADEC学习模型的实施,改进海洋污染物迁移的基本概念和化学表征。污染物在海洋中被溶解、电离甚至水解。本研究采用准实验设计,包括一组测试前和测试后设计。使用的仪器是四级诊断测试。它用于观察学生对海洋污染物迁移概念的基本概念和化学表征的改进。在课堂结束时,大多数学生的水平是缺乏知识,甚至缺乏科学概念。统计数据显示,学生的测试前和测试后存在显著的平均差异。这清楚地表明,RADEC学习模式对学生的基本概念和化学表征水平产生了影响。工作表引起的改进。它激发了学生们创造废物过滤器或化学产品的灵感,这些过滤器或产品可以吸收海洋中的废物,甚至可以创造亚微观的表现。
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引用次数: 3
Analysis of reduction of COD (Chemical Oxygen Demand) levels in tofu waste using activated sludge method 活性污泥法降低豆腐渣化学需氧量的分析
IF 1.1 Q3 Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27586
Wati Sukmawati, A. Kadarohman, O. Sumarna, W. Sopandi
This study aims to reduce COD (Chemical Oxygen Demand) levels in tofu waste using activated sludge. The method used to conduct this experiment is to use the fermentation method by grouping the tofu dregs samples into three groups. Then the tofu dregs sample was added with 1:3 activated sludge and incubated for two days, four days, and six days. The results showed that samples with an incubation period of 2 days had effectiveness in reducing COD levels in tofu waste as much as52.3%; during the incubation period of 4 days can reduce COD levels by 75.5%, and during the incubation period for six days have 79.8% effectiveness in reducing COD levels. A significant increase in the decrease in COD levels on the sixth day indicates that the microbes in activated sludge can multiply optimally to decompose waste and reduce COD levels optimally. In addition, the incubation time on the sixth day of the nutrients required by microbes increased, thereby increasing microbial activity. So it can be concluded that the incubation process of tofu dregs with activated sludge for six days is effective in reducing COD levels and can overcome environmental pollution problems.
本研究旨在利用活性污泥降低豆腐渣中的化学需氧量。进行该实验的方法是使用发酵法,将豆腐渣样品分为三组。然后在豆腐渣样品中加入1:3的活性污泥,分别培养2天、4天和6天。结果表明,培养期为2天的样品对豆腐渣中COD的有效降低率高达52.3%;在4天的孵化期内可降低75.5%的COD水平,在6天的孵化期间可降低79.8%的COD水平。第六天COD水平的下降显著增加,表明活性污泥中的微生物可以最佳繁殖以分解废物并最佳降低COD水平。此外,微生物所需营养物质在第六天的培养时间增加,从而提高了微生物的活性。因此,豆腐渣与活性污泥共孵育6天是有效降低COD水平的,可以克服环境污染问题。
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引用次数: 3
Phytochemical screening and the antioxidant, antibacterial and antifungal activities of aqueous extracts from the leaves of Salvia officinalis planted in Morocco 摩洛哥鼠尾草叶水提物的植物化学筛选及其抗氧化、抗菌和抗真菌活性
IF 1.1 Q3 Chemistry Pub Date : 2021-08-06 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.24840
I. Maliki, A. E. Moussaoui, M. Ramdani, K. Elbadaoui
The aqueous extract of the leaves of Salvia officinalis planted in Morocco is analyzed using different methods in order to study the different phytochemical components (phytochemical screening) and to test in parallel the antioxidant, antibacterial and antifungal activities. The main phytochemical components of salvia officinalis are: phenolics complex 13.87±1.96 mg E.AG/g, flavonoids 7.38±1.91mg E.Q/g and tannins 0.18±0.03 μg E.Cat/g, as well as different concentrations of saponins, alkaloids and mucilage.  The antioxidant activity is achieved by four different methods: the DPPH test (IC-50 = 8.2 μg/ml higher than BHT (1.2 μg/ml)); the s-carotene decolorization test (the inhibition of oxidation of the aqueous extract (64.2%) was greater than the negative control (13. 87%)); the reducing power test (FRAP) (detection of a low reducing power of iron for the aqueous extract compared to quercetin) and the total antioxidant capacity (CAT), this test revealed an antioxidant capacity of 103.7±5.8 mg/g. The aqueous extract of salvia officinalis leaves showed antibacterial activity against four pathogenic bacteria: E. coli 57, K. pneumoniae, P. aeruginosa, S. aureus, noting MIC values of 0.25mg/ml; 0.125mg/ml; 0. The extract showed antifungal activity against two yeasts (S. sereveseae (0.25 mg/mlet C. albicans 0.25 mg/ml), using the agar diffusion method and the direct contact method.
采用不同的方法对摩洛哥种植的鼠尾草叶水提物进行分析,研究其不同的植物化学成分(植物化学筛选),并同时测试其抗氧化、抗菌和抗真菌活性。丹参的主要化学成分为酚类化合物(13.87±1.96 mg E.AG/g)、类黄酮(7.38±1.91mg E.Q/g)和单宁(0.18±0.03 mg e.g /g),以及不同浓度的皂苷、生物碱和粘液。通过四种不同的方法获得抗氧化活性:DPPH试验(IC-50 = 8.2 μg/ml,高于BHT (1.2 μg/ml));s-胡萝卜素脱色试验(水提物对氧化的抑制作用为64.2%)大于阴性对照(13。87%));还原力测试(FRAP)(检测与槲皮素相比,水提物的铁还原力较低)和总抗氧化能力(CAT),该测试显示其抗氧化能力为103.7±5.8 mg/g。丹参叶水提物对大肠杆菌57、肺炎克雷伯菌、铜绿假单胞菌、金黄色葡萄球菌4种病原菌均有抑菌活性,MIC值为0.25mg/ml;0.125毫克/毫升;0. 采用琼脂扩散法和直接接触法对两种酵母菌(sereveseae, 0.25 mg/ml; C. albicans, 0.25 mg/ml)均有抑菌活性。
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引用次数: 4
Fundamental chemistry concepts on environmental pollution: Experts validation of pre-learning questions 环境污染的基础化学概念:专家对学习前问题的验证
IF 1.1 Q3 Chemistry Pub Date : 2021-08-05 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27583
R. Sukardi, W. Sopandi, Riandi
The purpose of the research was conducting expert validation on environmental pollution problems based on the fundamental chemistry concepts. The type of research was design and development that involved three experts as validators. Data processing was carried out using SPSS ver.26 through the Kendall test. The values of Asymp.Sig. showed that pre-learning questions were valid in terms of the compatibility of pre-learning questions with indicators of the national curriculum and SDGs, compatibility of pre-learning questions with creative thinking indicators, and clarity of language use. The pre-learning questions were divided into ten indicators. Most of them asked students to describe of how greenhouse gases, heavy metal, and solid or liquid nano-plastic destroy environment. Students explained and wrote the chemical representations of those processes, namely macroscopic, sub-microscopic, and symbolic. Pre-learning questions were valid because they have conducted a curriculum review and the needs analysis. Besides, the creation process also involved teachers who mastered fundamental concept of chemistry and understood the condition of students. The validated pre-learning question is expected to help teachers deliver the fundamental concepts of chemistry on environmental pollution well so that teachers can achieve learning objectives.
研究的目的是在基本化学概念的基础上对环境污染问题进行专家验证。研究的类型是设计和开发,涉及三个专家作为验证者。数据处理采用SPSS ver。通过肯德尔测试。渐近线的值。在与国家课程和可持续发展目标指标的兼容性、与创造性思维指标的兼容性以及语言使用的清晰度方面,学习前问题是有效的。学习前问题分为十个指标。他们大多要求学生描述温室气体、重金属、固体或液体纳米塑料是如何破坏环境的。学生们解释并写下这些过程的化学表征,即宏观的、亚微观的和象征性的。学习前的问题是有效的,因为他们已经进行了课程回顾和需求分析。此外,在创作过程中还需要教师掌握基本的化学概念,了解学生的情况。经过验证的学习前问题可以帮助教师更好地传达环境污染化学的基本概念,从而达到教师的学习目标。
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引用次数: 0
How does chemistry of rare earth metals coordination complexes can enhance system thinking ability? A qualitative content analysis study 稀土金属配位配合物化学如何提高系统思维能力?定性内容分析研究
IF 1.1 Q3 Chemistry Pub Date : 2021-08-05 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27582
B. Kisworo, A. Mudzakir, S. Liliasari
Abstract Chemistry of rare earth metals coordination complexes has a potential as a material for teaching and learning sustainable chemistry principles. System thinking has an important role to link the chemistry of rare earth metals coordination complexes to the principle of sustainability. This study was conducted to obtain scientist conception about chemistry of rare earth metals coordination complexes as sustainable material that emphasized enhancement students’ system thinking ability. The Method used is qualitative content analysis (inductive literature review type). It is includes the collection of research articles, descriptive analysis, category selection and material evaluation based on didactical view. The instrument used is a content analysis format related to the concept of rare earth metals coordination complexes. The results showed that the scientist’s conception of rare earth metals coordination complexes can be analyzed to qualitative with used inductive approach. The scientist’s conception was obtained which are important concepts such as synthesis, characterization, and application of material based on rare earth metals. The synthesis of coordination complexes is carried out using central atoms in the form of metals and/or rare earth ions with several ligands. The characterization of complexes compound conducted to determine their solubility, crystal structure, and physicochemical properties. Based on its application reviewed, chemistry of coordination complexes showed environmentally safe properties, society, and increase economic value.
稀土金属配位配合物具有作为可持续化学原理教学材料的潜力。系统思维对于将稀土金属配合物的化学性质与可持续性原则联系起来具有重要作用。本研究旨在获得稀土金属配合物作为可持续材料的化学概念,强调提高学生的系统思维能力。使用的方法是定性内容分析(归纳文献综述型)。它包括研究文章的收集、描述性分析、类别选择和基于教学观点的材料评价。所使用的仪器是一种与稀土金属配位配合物概念有关的含量分析格式。结果表明,科学家对稀土金属配位配合物的概念可以用归纳的方法进行定性分析。在此基础上,提出了基于稀土金属材料的合成、表征和应用等重要概念。配位配合物的合成是利用金属和/或稀土离子形式的中心原子与若干配体进行的。对配合物进行表征,以确定其溶解度、晶体结构和物理化学性质。综述了配合物的应用,指出配合物具有环境安全、社会效益和经济效益。
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引用次数: 0
The use of simple spectrophotometer in STEM education: A bibliometric analysis 简单分光光度计在STEM教育中的应用:文献计量学分析
IF 1.1 Q3 Chemistry Pub Date : 2021-08-05 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.27581
A. Shidiq, A. Permanasari, Hernani, S. Hendayana
This study aims to provide a bibliometric analysis on the topic of the simple spectrophotometer. By using the VOSviewer software, bibliometric analysis methods from 128 articles were used in this study. The articles were selected based on the inclusion and exclusion criteria predefined. The results of this study indicate that several simple spectrophotometer instruments have been used for teaching and learning in chemistry and other STEM areas, such as UV-Vis and photometers. This instrument was built by replacing the main components in the spectrophotometer, such as the light source and detector, to be simpler. The development of other types of spectrophotometers that involve students in building them can be a potential research alternative in Chemistry and other STEM areas. This research is expected to provide a better understanding of the challenges and opportunities of using a simple spectrophotometer for teaching and learning purposes.
本研究旨在对简单分光光度计的主题进行文献计量分析。采用VOSviewer软件对128篇文献进行计量分析。根据预先确定的纳入和排除标准选择文章。本研究结果表明,几种简单的分光光度计仪器已被用于化学和其他STEM领域的教学,如紫外-可见和光度计。该仪器是通过更换分光光度计的主要部件,如光源和检测器,使其更简单。开发其他类型的分光光度计,让学生参与其中,可以成为化学和其他STEM领域的潜在研究替代方案。本研究旨在更好地了解在教学和学习中使用简单分光光度计的挑战和机遇。
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引用次数: 9
Synthesis and antimicrobial activity of some quinoxaline derivatives 喹诺啉类衍生物的合成及抗菌活性研究
IF 1.1 Q3 Chemistry Pub Date : 2021-05-01 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.25855
A. Janati, Y. Ouzidan, Y. Rodi, F. O. Chahdi, M. Chraibi, K. F. Benbrahim, I. Alaoui, A. E. Hakmaoui, M. Safi, M. Akssira, E. Essassi
Some new structural motifs containing the quinoxaline nucleus have been synthesized and examined for their pharmacological properties. In this study, 6-chloroquinoxaline-2,3(1H, 4H)-dione and 6 nitroquinoxaline-2,3(1H, 4H)-dione were synthesized as basic nuclei for the preparation of the new quinoxaline-2,3-diones by alkylation reactions under the conditions of phase transfer catalysis. The products were characterized by spectroscopic methods 1 H and 13 C NMR. Then, the synthesized products were tested for their antibacterial effects against two bacterial strains. The values of minimum inhibitory concentrations (MIC) vary according to the nature of the alkyl bonded to the quinoxaline nucleus.
合成了一些含有喹喔啉核的新结构基序,并对其药理学性质进行了研究。在相转移催化条件下,合成了6-氯喹喔啉-2,3(1H,4H)-二酮和6-硝基喹喔啉-2,3(1H、4H)二酮作为碱性核,通过烷基化反应制备了新的喹喔啉2,3-二酮。通过1H和13CNMR光谱方法对产物进行了表征。然后,测试了合成产物对两种菌株的抗菌效果。最小抑制浓度(MIC)的值根据与喹喔啉核结合的烷基的性质而变化。
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引用次数: 4
Synthesis, NMR, DFT, GRD, MEP, FMO’s analysis and comparison of E and Z-isomer of N'-((4-bromothiophen-2-yl)methylene)naphthalene-2-sulfonohydrazide N′-((4-溴噻吩-2-酰基)亚甲基)萘-2-磺酰肼E、z异构体的合成、NMR、DFT、GRD、MEP、FMO分析与比较
IF 1.1 Q3 Chemistry Pub Date : 2021-05-01 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.26239
Sameer Amereih, Abd Daraghmeh, Mohammmed Al-Nuri, M. Suleiman, A. Zarrouk, I. Warad
A novel Schiff base N'-((4-bromothiophen-2-yl) methylene) naphthalene-2-sulfonohydrazide ligand was prepared by condensation of equivalents amount of naphthalene -2-sulfonylhydrazide with 4-bromo-2-thiophenecarboxaldehyde. The newly synthesized ligand was isolated in excellent yield. CHN-EA, UV-Vis., GC/MS, FT-IR, 1 H and 13 C NMR were used to determine the structure of the desired ligand. Density functional theory DFT B3LYP/6-311G(d,p) was performed to optimize the E and Z- structural isomerization process. Several quantum calculation parameters like optimized bond length, angle ant torsional angels in addition to HOMO/LUMO, GRD, and MEP map, for both E and Z isomers have been calculated and compared under the same level of theory.
用等量萘-2-磺酰肼与4-溴-2-噻吩甲醛缩合制备了新型希夫碱N′-((4-溴-2-基)亚甲基萘-2-磺酰肼配体。新合成的配体分离率高。CHN-EA,紫外可见。采用GC/MS、FT-IR、1h和13c NMR等方法对配体的结构进行了表征。采用密度泛函理论DFT B3LYP/6-311G(d,p)对E -和Z-结构异构化过程进行优化。在同一理论水平下,计算比较了E和Z异构体除HOMO/LUMO、GRD、MEP图外的优化键长、角度、扭转角等量子计算参数。
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引用次数: 1
Palm oil and cinnamon (anti-microbial agent) on the physicochemical, mechanical, and biodegradation properties of micrometer-sized cornstarch-based bioplastic 棕榈油和肉桂(抗菌剂)对微米级玉米淀粉基生物塑料的理化、机械和生物降解性能的影响
IF 1.1 Q3 Chemistry Pub Date : 2021-03-25 DOI: 10.48317/IMIST.PRSM/MORJCHEM-V9I2.25684
S. Anggraeni, A. Nandiyanto, A. M. Nurjami, S. N. Hofifah, Silmi, Ridwan Putri, G. C. S. Girsang, M. Fiandini
The purpose of this study was to determine the effect of the addition of palm oil and cinnamon on the physicochemical, mechanical, and biodegradation properties of cornstarch-based bioplastic. Experiments were done by adding cornstarch into water, glycerol, acetic acid, and cinnamon. Then, the mixed suspension was heated at 100⁰C, added with palm oil (0.19; 0.30; 0.60; 0.90; 1.30; 1.90 %(v/v)), molded, and dried at room temperature without exposure to sunlight. To support the analysis, several characterizations (i.e. FTIR, digital microscope, puncture test, compressive test, and biodegradability test) were conducted. Based on puncture and compressive test, the bioplastic with an addition of 1.90 %(v/v) palm oil showed good mechanical properties. In general, the addition of palm oil increased the biodegradation rate. The palm oil contains double bonds in unsaturated fatty acids that can be distributed to the bioplastic matrix. Higher lipid content caused less moisture in the bioplastic so that the bioplastic was more brittle, inelastic, and degradable. However, the antimicrobial amount in the cinnamon reduced the biodegradability of bioplastic. This research provided new information on bioplastics as environmentally friendly plastic and alternative to conventional plastic.
本研究的目的是确定添加棕榈油和肉桂对玉米淀粉基生物塑料的物理化学、机械和生物降解性能的影响。将玉米淀粉加入水、甘油、醋酸和肉桂中进行实验。然后,在100⁰C下加热混合悬浮液,加入棕榈油(0.19;0.30;0.60;0.90;1.30;1.90% (v/v)),模制,室温干燥,不暴露在阳光下。为了支持分析,进行了几种表征(即FTIR,数码显微镜,穿刺测试,压缩测试和生物降解性测试)。通过穿刺和压缩试验,发现添加1.90% (v/v)棕榈油的生物塑料具有良好的力学性能。总的来说,添加棕榈油提高了生物降解率。棕榈油中含有双键的不饱和脂肪酸,可以分布到生物塑料基质中。较高的脂质含量导致生物塑料中的水分较少,因此生物塑料更脆,无弹性,可降解。然而,肉桂中的抗菌量降低了生物塑料的生物降解性。这项研究为生物塑料作为环保塑料和传统塑料的替代品提供了新的信息。
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引用次数: 1
期刊
Moroccan Journal of Chemistry
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