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The Influence of Tartaric Acid in the Silver Nanoparticle Synthesis Using Response Surface Methodology

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Journal of Renewable Materials 2024年第2期12卷 245-258页

作者： yatim Lailun Ni’mah Afaf Baktir Dewi Santosaningsih Suprapto Suprapto Chemistry Department Faculty of Science and Data AnalyticsInstitut Teknologi Sepuluh NopemberSurabayaIndonesia Chemistry Department Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia Department Clinical Microbiology Faculty of MedicineBrawijaya UniversityMalangIndonesia

Silver nanoparticles(AgNPs)synthesized using tartaric acid as a capping agent have a great impact on the reaction kinetics and contribute significantly to the stability of *** protective layer formed by tartaric acid is an important factor that protects the silver surface and reduces potential cytotoxicity *** attributes are critical for assessing the compatibility of AgNPs with biological systems and making them suitable for drug delivery *** aim of this research is to conduct a comprehensive study of the effect of tartaric acid concentration,sonication time and temperature on the formation of silver *** Response Surface Methodology(RSM)with Face-Centered Central Composite Design(FCCD),the optimization process identifies the most favorable synthesis ***-Vis spectrum regression analysis shows that AgNPs stabilized with tartaric acid are more stable than AgNPs without tartaric *** highlights the increased stability that tartaric acid provides in AgNP *** size distribution analysis showed a multimodal distribution for AgNPs with tartaric acid and showed the smallest size peak with an average size of 20.53 *** second peak with increasing intensity shows a dominant average size of 108.8 nm accompanied by one standard deviation of 4.225 nm and a zeta potential of−11.08 *** contrast,AgNPs synthesized with polyvinylpyrrolidone(PVP)showed a unimodal particle distribution with an average particle size of 81.62 nm and a zeta potential of−2.96 *** more negative zeta potential of AgNP-tartaric acid indicates its increased *** of antibacterial activity showed that AgNPs stabilized with tartaric acid showed better performance against *** and *** bacteria compared with *** summary,this study highlights the potential of tartaric acid in AgNP synthesis and suggests an avenue for the development of stable AgNPs with versatile applications.

关键词： Tartaric acid silver nanoparticle polyvinyl pyrrolidone response surface methodology

Adsorption of Malachite Green Using Activated Carbon from Mangosteen Peel: Optimization Using Box-Behnken Design

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Journal of Renewable Materials 2024年第5期12卷 981-992页

作者： Nabila Eka Yuningsih Latifa Ariani Suprapto Suprapto Ita Ulfin Harmami Harmami Hendro Juwono yatim Lailun Ni’mah Department of Chemistry Faculty of Science and Data AnalyticsInstitute Technology of Sepuluh NopemberSurabaya60111Indonesia

In this research,activated carbon from mangosteen peel has been synthesized using sulfuric acid as an *** adsorption performance of the activated carbon was optimized using malachite green dye as ***-chite green dye waste is a toxic and non-biodegradable material that damages the *** of adsorption processes was carried out using Response Surface Methodology(RSM)with a Box-Behnken Design(BBD).The synthesized activated carbon was characterized using FTIR and SEM *** FTIR spectra conﬁrmed the presence of a sulfonate group(-SO_(3)H)in the activated carbon,indicating that the activation pro-cess using sulfuric acid was *** characterization shows that activated carbon has porous *** was carried out for three adsorption parameters,namely contact time(20,60,and 120 min),adsor-bent mass(0.005,0.025,and 0.05 g),and initial concentration of malachite green solution(5,50,and 100 mg·L^(-1)).The concentration of the malachite green solution was determined using a UV-Vis spectrophotometer at the max-imum wavelength of malachite green,618 *** optimum of malachite green adsorption using mangosteen peel activated carbon was obtained at a contact time of 80 min,an adsorbent mass of 0.032 g,and malachite green initial concentration of 25 mg·L^(-1),with a maximum removal percentage and maximum adsorption capacity of 93.66%and 19.345 mg·g^(-1),respectively.

关键词： Response surface methodology dyes activated carbon experimental design

The Adsorption of Pb(II)Using Silica Gel Synthesized from Chemical Bottle Waste:Optimization Using Box-Behnken Design

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Journal of Renewable Materials 2023年第6期11卷 2913-2924页

作者： yatim Lailun Ni’mah Nabila Eka Yuningsih Suprapto Suprapto Department of Chemistry Faculty of Science and Data AnalyticsInstitut Teknologi Sepuluh NopemberSurabayaIndonesia

The adsorption of Pb(II)on silica gel synthesized from chemical glass bottle waste has been *** effect of independent variables(adsorbent dose,initial concentration of Pb(II),contact time,and pH)on the Pb(II)removal from water was evaluated and optimized using the Response Surface Methodology(RSM).Under optimized conditions(adsorbent dose:20 mg;contact time:30 min;initial Pb(II)concentration:120 mg.L^(−1);and pH:8),the removal of Pb(II)was 99.77%.The adsorption equilibrium data obtained from the batch experiment were investigated using different isotherm *** Langmuir isotherm model fits the experimental *** shows that the surface of the silica gel synthesized from chemical bottles waste was covered by a Pb(II)*** analysis showed that the synthesized silica gel had a SiO_(2) content of 75.63%.Amorphous silica was observed from XRD ***-EDX characterization showed that Pb was adsorbed on the silica gel *** analysis showed that silica gel has irregular particles with a surface area of 297.08 m2.g^(−1) with a pore radius of 15.74 nm calculated from BET analysis.

关键词： Chemical bottle waste silica gel adsorption box-behnken design response surface methodology

Numerical Simulations of One-Directional Fractional Pharmacokinetics Model

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Computers, Materials & Continua 2022年第12期73卷 4923-4934页

作者： Nursyazwani Mohamad Noor Siti Ainor Mohd yatim Nur Intan Raihana Ruhaiyem School of Distance Education Universiti Sains MalaysiaUSM PenangPenang11800Malaysia School of Computer Science Universiti Sains MalaysiaUSM PenangPenang11800Malaysia

In this paper,we present a three-compartment of pharmacokinetics model with irreversible rate *** compartment consists of arterial blood,tissues and venous ***’s principle and the law of mass action were used to develop the model based on the diffusion *** model is modified into a fractional pharmacokinetics model with the sense of Caputo *** existence and uniqueness of the model are investigated and the positivity of the model is *** behaviour of the model is investigated by implementing numerical algorithms for the numerical solution of the system of fractional differential *** software is used to plot the graphs for illustrating the variation of drug concentration concerning ***,the numerical simulations of the model are presented for different values ofαwhich verified the theoretical ***,we also observed the pattern of the simulations at the three-compartment of the model by using different values of initial conditions.

关键词： Pharmacokinetics model Irreversible rate Fractional order Numerical simulations

Malachite Green Adsorption Using Carbon-Based and Non-Conventional Adsorbent Made from Biowaste and Biomass:A Review

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Journal of Renewable Materials 2023年第11期11卷 3789-3806页

作者： Annisa Ardiyanti Suprapto Suprapto yatim Lailun Ni’mah Department of Chemistry Faculty of Sciences and Data AnalyticsInstitut Teknologi Sepuluh NopemberKampus ITS-SukoliloSurabaya60111Indonesia

Dyes are pervasive contaminants in wastewater,posing significant health risks to both humans and *** the various methods employed for effective dye removal,adsorption has emerged as a highly promising approach due to its notable advantages,including high efficiency,cost-effectiveness,low energy consumption,and operational simplicity compared to alternative *** comprehensive review focuses on investigating adsorbents derived from biowastes and biomass,specifically carbon-based and non-conventional adsorbents,for the removal of malachite green,a widely used dye known for its toxic and carcinogenic ***-based adsorbents encompass two main types:activated carbon and biochar,while non-conventional adsorbents refer to powder sorbents without carbonaceous *** studies have reported remarkable findings,with achieved maximum removal percentages exceeding 98%and capacities reaching 250 mg/*** results highlight the exceptional efficacy of the reviewed adsorbents in eliminating malachite green from *** exploring the potential of bio-based adsorbents,this review sheds light on sustainable and environmentally friendly solutions for mitigating dye pollution.

关键词： Adsorption carbon dyes malachite green wastewater

Silica Gel from Chemical Glass Bottle Waste as Adsorbent for Methylene Blue:Optimization Using BBD

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Journal of Renewable Materials 2023年第12期11卷 4007-4023页

作者： Suprapto Suprapto Putri Augista Nur Azizah yatim Lailun Ni’mah Chemistry Department Faculty of Science and Analytical DataInstitut Teknologi Sepuluh NopemberSurabayaIndonesia

This research focuses on the effective removal of methylene blue dye using silica gel synthesized from chemical glass bottle waste as an environmentally friendly and cost-effective *** adsorption process was optimized using Box-Behnken Design(BBD)and Response Surface Methodology(RSM)to investigate the influence of pH(6;8 and 10),contact time(15;30 and 45 min),adsorbent mass(30;50 and 70 mg),and initial concentration(20;50 and 80 mg/L)of the adsorbate on the adsorption *** BBD was conducted using Google Colaboratory software,which encompassed 27 experiments with randomly assigned *** silica gel synthesized from chemical glass bottle was characterized by XRD,FTIR,SEM-EDX and *** adsorption result was measured by spectrophotometer *** optimized conditions resulted in a remarkable methylene blue removal efficiency of 99.41%.Characterization of the silica gel demonstrated amorphous morphology and prominent absorption bands characteristic of *** Langmuir isotherm model best described the adsorption behavior,revealing chemisorption with a monolayer coverage of methylene blue on the adsorbent surface,and a maximum adsorption capacity of 82.02 mg/***,the pseudo-second-order kinetics model indicated a chemisorption mechanism during the adsorption *** findings highlight the potential of silica gel from chemical glass bottle waste as a promising adsorbent for wastewater treatment,offering economic and environmental *** investigations can explore its scalability,regenerability,and reusability for industrial-scale applications.

关键词： Glass bottle waste silica gel adsorption waste treatment methylene blue Box-Behnken design

The Fabrication of Water-Soluble Chitosan Capsule Shell Modified by Alginate and Gembili Starch(Dioscorea esculenta L)

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Journal of Renewable Materials 2022年第9期10卷 2365-2376页

作者： yatim Lailun Ni’mah Suprapto Suprapto Harmami Ita Ulfin Puput Asmaul Fauziyah Chemistry Department Faculty of Science and Analytical DataInstitut Teknologi Sepuluh NopemberSurabayaIndonesia

Capsule shells have been successfully fabricated from water-soluble chitosan(WSC)with the addition of alginate and Gembili *** was synthesized from crab shell chitosan by depolymerization *** capsule shells were made with the composition of WSC:Alginate,2:1,3:1 and 4:1(w/w)with and without the addition of Gembili *** starch was added with a ratio of Alginate:Starch,1:1(w/w).The capsule shell properties were evaluated according to Indonesian Pharmacopoeia *** solubility test showed that the capsule shells were comply with the *** highest degrees of swelling in water and HCl 0.1 N solution were 491.93%and 410.51%,*** highest degradation percentages in water and HCl 0.1 N solution were 57.80%and 21.44%,*** observation of physical appearance indicated that the capsule shell with WSC:Alginate:Starch in ratio of 3:1:1 has appearance close to commercial capsule shell.

关键词： Capsule shell water soluble chitosan capsule shell degradation capsule shell solubility

Development of CaO From Natural Calcite as a Heterogeneous Base Catalyst in the Formation of Biodiesel:Review

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Journal of Renewable Materials 2019年第10期7卷 915-939页

作者： Nuni Widiarti yatim Lailun Ni’mah Hasliza Bahruji Didik Prasetyoko Department of Chemistry Faculty of SciencesInstitute Technology Sepuluh Nopember Surabaya 60111Indonesia Jl.Arief Rahman HakimSukoliloSurabaya 60111Indonesia Center of Advanced Materials and Energy Science Universiti Brunei DarussalamNegara Brunei Darussalam.

Biodiesel is a fossil fuel that is in demand to be developed because it is bio-renewable,biodegradable and environmentally *** produced from the transesterification reaction of vege *** using a base *** is the most developed catalyst for the reaction of transesterification of oil into biodiesel because it is cheap,the process is easy and has a high level of *** is a cheap catalyst because it is easily obtained from natural *** use of CaO catalysts in the reaction formation of biodiesel continues to develop through modification with various porous materials and different oxide *** this paper,we discuss the development of CaO,the modification of CaO with a porous material and metal oxide,the mechanism of reaction of CaO and the kinetics of reactions that occur in the reaction transesterification of oil to biodiesel.

关键词： Biodiesel CaO modification transesterification

High Order Block Method for Third Order ODEs

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Computers, Materials & Continua 2021年第4期67卷 1253-1267页

作者： A.I.Asnor S.A.M.yatim Z.B.Ibrahim N.Zainuddin School of Distance Education Universiti Sains MalaysiaUSM Penang11800Malaysia Department of Mathematics Faculty of ScienceUniversiti Putra MalaysiaSerdangSelangor Darul Ehsan43400Malaysia Department of Fundamental and Applied Sciences Universiti Teknologi PETRONASSeri IskandarPerak Darul Ridzuan32610Malaysia

Many initial value problems are difficult to be solved using ordinary,explicit step-by-step methods because most of these problems are considered *** implicit methods,however,are capable of solving stiff ordinary differential equations(ODEs)usually found in most applied *** study aims to develop a new numerical method,namely the high order variable step variable order block backward differentiation formula(VSVOHOBBDF)for the main purpose of approximating the solutions of third order *** computational work of the VSVO-HOBBDF method was carried out using the strategy of varying the step size and order in a single *** order of the proposed method was then discussed in *** advancement of this strategy is intended to enhance the efficiency of the proposed method to approximate solutions *** order to confirm the efficiency of the VSVO-HOBBDF method over the two ODE solvers in MATLAB,particularly ode15s and ode23s,a numerical experiment was conducted on a set of stiff *** numerical results prove that for this particular set of problem,the use of the proposed method is more efficient than the comparable ***-HOBBDF method is thus recommended as a reliable alternative solver for the third order ODEs.

关键词： Block method stiff ODEs third order variable step variable order