List of Articles حذف

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Investigation of Using Ultrafiltration and Fenton Combined treatment method for pulp and paper wastewater Treatment
  niloofar Abedinzade alireza pendashteh Fariba Ostovar
  10.29252/.2.3.1
  In this study, the treatability of pulp and paper wastewater has been studied using a combined method (ultrafiltration and fenton) in a laboratory scale. First, the effect of membrane filtration on the removal of turbidity and COD, as well as membrane flux and membrane More

  In this study, the treatability of pulp and paper wastewater has been studied using a combined method (ultrafiltration and fenton) in a laboratory scale. First, the effect of membrane filtration on the removal of turbidity and COD, as well as membrane flux and membrane fouling were investigated, and then the advanced oxidation method was used to supplement the treatment and increase the removal efficiency of the pollutants. At the end of the membrane filtration operation, the removal efficiency of turbidity was 99%. Based on the results, the average COD of the filtration process with 41.8% removal efficiency was 906 mg/ l. Under optimal pressure conditions bar-1, the amount of membrane flux in the first backwash was equal to 1/99 L.m-2.h-1 which this amount reached to 1/26 L.m-2.h-1after the fourth backwash. the Fenton process removed 862/5 mg /L COD from the pretreated wastewater by UF membrane with an optimal dose of 1.5 mM for Fe +2 and 6 mM for a hydrogen peroxide at an initial pH of 3 and at a 17minute reaction time .In these conditions, the removal efficiency of COD, BOD5 and color was 95%, 90.3% and 92.1% respectively, These results shows high efficiency of the advanced oxidation process to remove contaminants in pulp and paper wastewater Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - A Review of Arsenic Removal Methods from Water Resources
  Marzieh Hasanzadeh Fariba Ostovar
  10.29252/.4.6.39
  Many of the pollutants in water are known to be harmful for human health and toxic for environment. Among these pollutants, Arsenic is more important because millions of people are exposed to contaminated drinking water. The World Health Organization (WHO) has identifie More

  Many of the pollutants in water are known to be harmful for human health and toxic for environment. Among these pollutants, Arsenic is more important because millions of people are exposed to contaminated drinking water. The World Health Organization (WHO) has identified the permitted limit of below 0.01 mg/L (10 micrograms per liter) for arsenic in drinking water and the same amount for arsenic has been reported in Iran's 1053 standard. In this study, various techniques have been investigated for removing Arsenic and efficiency of different nanoparticles in treatment of Arsenic from drinking water. Common methods of removing Arsenic from water sources are including oxidation, coagulation and flocculation, reverse osmosis and ultrafiltration, ion exchange, phytoremediation and new technologies based on the use of nanoparticles. The findings showed that despite of the high arsenic removal percentage using different methods such as oxidation, ion exchange and floating with dissolved air, these methods are not economic and a lot of time is required to achieve optimal efficiency. Recently, the use of nanoparticles has become very popular, so that metal oxide nanoparticles such as magnetic iron, Zinc, Copper, Serum, and Aluminum can completely eliminate Arsenic soluble with a high concentration of 50 mg/L in water sources and after the adsorbent is saturated, it is possible to use the regeneration of adsorbents, repeatedly by adsorbing the pollutant into the adsorbent. As a result, the use of nanoparticles is better than chemical processes and is economic due to their high efficiency in a short time. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Brevity and Deletion in Contemporary Poetry (Focusing on Nima Yushij, Ahmad Shamlu, Mahdi Akhavan Sales, Sohrab Sepehri, and Yad-al Allah Ro’yaei)
  لیلا  کردبچه
  Brevity means decorating speech from additional comments and unnecessary elements, so that the most content may be stated by the lowest number of words; this method, which is also used in old literature but its special consideration is one the most significant successes More

  Brevity means decorating speech from additional comments and unnecessary elements, so that the most content may be stated by the lowest number of words; this method, which is also used in old literature but its special consideration is one the most significant successes of Contemporary Poetry, changed the syntactical structures in addition to speech briefing. The focus of some contemporary poets to some of these methods is practically an approach toward old linguistic structures, but some others can be regarded as the linguistic achievements of Contemporary Literature. The article reviews the methods of achieving Brevity in two main groups of brevity and deletion methods in poems of a group of contemporary poets and compares them with deletion and brevity methods in Old Classic Literature; we aimed to show the effect of Old Classic Literature linguistic structures on some part of brevity structures and the degree of innovation in some deletion methods of Contemporary Poem, in addition to identifying these methods in Contemporary Poem. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - An Improved Method for Adaptive Noise Cancellation of ECG Signals in very Difficult Conditions
  Ahmad Ayatollahi S. H. Sabzpooshan
  We present a new adaptive noise cancellation method for ECG noise cancelling in very difficult conditions. This method is based on modified variable step size LMS algorithm. We show that the proposed algorithm is more efficient and the adaption speed is higher than conv More

  We present a new adaptive noise cancellation method for ECG noise cancelling in very difficult conditions. This method is based on modified variable step size LMS algorithm. We show that the proposed algorithm is more efficient and the adaption speed is higher than conventional LMS Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  5 - Design and Implementation of a Compact, Microstrip Coupler with Harmonics Suppression Using T-Shaped and Stepped-Impedance Resonators
  sonhan roshany Somayeh karimi Saeed Roshani
  In this paper a novel compact microstrip coupler using T-shaped and stepped impedance resonators is proposed, simulated and fabricated. In the proposed structure long quadrature wavelength lines are replaced with small resonators, which results in size reduction and ha More

  In this paper a novel compact microstrip coupler using T-shaped and stepped impedance resonators is proposed, simulated and fabricated. In the proposed structure long quadrature wavelength lines are replaced with small resonators, which results in size reduction and harmonics suppression. The proposed coupler correctly works at 1 GHz and suppresses 2nd up to 7th unwanted harmonics. Moreover the designed coupler reduces the circuit size more than 65% compared to the conventional coupler. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  6 - The Pedagogical Narrative of Embodied Consciousness in the Post-Reductionist Era: The Inseparability of Mind-Body-Environment (MBE)
  Zeinab Mahdavi Bakhatiar shabanivaraky Tahereh Javidi Calate Jaafar Abad
  To narrate the pedagogy inspired by embodiment consciousness is the primary purpose of the paper. To reach it, firstly, the analytical account has offered the main consciousness streams which took a reductionism position about the phenomenon and, then, according to the More

  To narrate the pedagogy inspired by embodiment consciousness is the primary purpose of the paper. To reach it, firstly, the analytical account has offered the main consciousness streams which took a reductionism position about the phenomenon and, then, according to the shortcomings they have created, we criticised them. On the one hand, dualism held that mind and matter are distinct substances and preferred the mind as a non-material entity, leading to explanatory gab and the hard problem of consciousness later. The eliminativist's argument about consciousness is that "there is no such a thing." Therefore, mental states and awareness are exclusively confined only to the brain and neuroscientific subjects. On the other hand, neurophenomenology takes a holism position and, by refusing the explanatory gap, believes that there is no split between the mind-body and the world. Varela introduced the embodiment as a feature of consciousness which means that the integrated experience is intimately connected to situations and arise from contexts. Thus, we are active in the world and show a reaction, rather than isolated Cartesian minds that consist of pure thought or generally eliminated consciousness. The idea demonstrates even better in the pedagogy field due to embodiment consciousness by identifying students' first-person experience and emotional aspects and recovering Cartesian subjective preference. Moreover, bypassing traditional, static and dogmatic structures, pedagogy inspired by embodiment consciousness endeavor to conquer elimination problems and explain that human beings do not live inactively in a society with a set of predomination stuff like morality which has already existed just in neural system and the brain biologically. Therefore, embodiment consciousness has been suggested as an alternative to the previous streams. Here, the pedagogical stream is non-linear, emergent, and chaotic, in which monologue turns to dialogue. In these circumstances, the pedagogic connection refuses to follow static, linear, and predetermined regulation but avoids pursuing blindness and imitation. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  7 - Software Evaluation of Reducing the Number of Switching States and Removing the Weight Factor in the Predictive Current Control of Six-Phase Induction Motor
  Peyman Mirzaeipour esmaeel rokrok Mohsen Saniei Syed Qudrat Allah seifosadat
  The simple and accurate design of the flux weighting coefficient for the predictive current control (PCC) algorithm is an important issue that can be seen in all predictive controllers. It should be said that predictive current control is a promising method to obtain fa More

  The simple and accurate design of the flux weighting coefficient for the predictive current control (PCC) algorithm is an important issue that can be seen in all predictive controllers. It should be said that predictive current control is a promising method to obtain fast torque response with a simple and flexible structure, but its development to multi-phase drives can lead to dissatisfaction. In this article, due to the challenge of computing load of PCC algorithm, the weighting coefficient removal method is used and finally modified predictive current control (VV-PCC) without weighting coefficient is used for six-phase induction motor drive. Different operating conditions such as startup, sudden loading and different speeds have been investigated. As a result, choosing a switching state in PCC leads to high x-y currents, this problem requires a small number of repetitions with the proposed VV-PCC method based on removing the weighting factor, because the number of switching states has increased from 49 to 13, and finally It will reduce copper losses and improve power quality. The results and validation of the mentioned cases are presented using MATLAB software. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  8 - Recent Advances in Membranes Used for Nanofiltration to Remove Heavy Metals from Wastewater: A Review
  Farzad Mehrjo MohammadSaber Baghkhanipour Amir Alam
  The presence of heavy metal ions in polluted wastewater represents a serious threat to human health, making proper disposal extremely important. The utilization of nanofiltration (NF) membranes has emerged as one of the most effective methods of heavy metal ion removal More

  The presence of heavy metal ions in polluted wastewater represents a serious threat to human health, making proper disposal extremely important. The utilization of nanofiltration (NF) membranes has emerged as one of the most effective methods of heavy metal ion removal from wastewater due to their efficient operation, adaptable design, and affordability. NF membranes created from advanced materials are becoming increasingly popular due to their ability to depollute wastewater in a variety of circumstances. Tailoring the NF membrane’s properties to efficiently remove heavy metal ions from wastewater, interfacial polymerization, and grafting techniques, along with the addition of nano-fillers, have proven to be the most effective modification methods. This paper presents a review of the modification processes and NF membrane performances for the removal of heavy metals from wastewater, as well as the application of these membranes for heavy metal ion wastewater treatment. Very high treatment efficiencies, such as 99.90%, have been achieved using membranes composed of polyvinyl amine (PVAM) and glutaraldehyde (GA) for Cr3+ removal from wastewater. However, nanofiltration membranes have certain drawbacks, such as fouling of the NF However, nanofiltration membranes have certain drawbacks, such as fouling of the NF membrane. Repeated cleaning of the membrane influences its lifetime. membrane. Repeated cleaning of the membrane influences its lifetime. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  9 - Spirulina, wastewater dye absorbent microalgae
  Hanieh Mirbolooki fatemeh ghanbari Hooman Heravi
  10.61186/jert.46107.8.14.19
  Dye is the first known pollutant in industrial wastewater, and its small amount is very undesirable in water. Most of the dyes contain complex organic molecules and are harmful to aquatic life and humans due to the presence of metals, aromatics and other compounds in th More

  Dye is the first known pollutant in industrial wastewater, and its small amount is very undesirable in water. Most of the dyes contain complex organic molecules and are harmful to aquatic life and humans due to the presence of metals, aromatics and other compounds in their structure. Removing or reducing the amount of this pollutant entering the environment is essential, and biological absorption is one of these methods. The main purpose of this research is to investigate the removal of blue reactive textile dye by spirulina microalgae. In the process of conducting the research, the effect of variables such as contact time, injected algae dose and wastewater concentration was investigated on the dye removal process and the amount of absorption of the samples was measured by a spectrophotometer and the number of experiments was determined by the design expert software via response surface method (RSM) and the analysis of variance (ANOVA) statistical tool was used to analyze the obtained results. Based on the obtained results, in the optimal conditions of the experiment, the best percentage of dye removal by spirulina microalgae was 100% in contact time of 30 minutes with a dose of 10 ml of injected algae into wastewater with a color concentration of 50 mg/L. Therefore, the use of microalgae, in addition to being an inexpensive and easy-to-operate method for color removal from colored wastewater such as textile wastewater, it will be of interest to researchers as an environmentally friendly method to remove hard degradable pollutants. Manuscript profile