scholarly journals Filtration characteristics of garnet media before and after modification

2020 ◽  
Vol 10 (2) ◽  
pp. 133-145
Author(s):  
Wu Huifang ◽  
Yue Lingzhi ◽  
Wang Zhiyuan ◽  
He Jiang ◽  
Chen Ruoya ◽  
...  
Keyword(s):  
Quartz Sand ◽  
Specific Area ◽  
Polluted Water ◽  
Adsorption Experiment ◽  
Static Adsorption ◽  
Adsorption Mode ◽  
Dynamic Filtration ◽  
Before And After ◽  
The Media ◽  
Filtration Experiment

Abstract High-temperature calcination was used to modify garnet media. Brunauer–Emmett–Teller (BET) measurements, X-ray diffractometer (XRD), scanning electron microscopy (SEM), zeta potential analysis, and a static adsorption experiment on humic acid removal were carried out to compare unmodified garnet and traditional quartz sand. Fitting adsorption isotherm of the media before and after modification was conducted to determine the adsorption type, and a dynamic filtration experiment was performed to treat micro-polluted water. Results of the characterization analysis and the static adsorption experiment revealed that, compared with the smooth surface of unmodified garnet, the surface of modified garnet media was covered with Fe2O3, which showed a rough concave-convex structure with a specific area that was 2.44 times larger than that of unmodified garnet. The removal efficiency of organic matter after modification increased from 2.5–4.5% to 51.7–63.1%, and the adsorption capacity increased 11–24 times. The adsorption type of the modified garnet media belongs to the Langmuir and Freundlich adsorption mode, while that of the original media belongs to the Freundlich adsorption mode. Results of the dynamic filtration experiment revealed that the effect of modified garnet media on turbidity, CODMn, and UV254 removal was better than that of unmodified garnet and traditional quartz sand.

scholarly journals Evaluation of omphacite and iron-coated omphacite as a water filtration medium

2021 ◽  
Author(s):  
Huifang Wu ◽  
Yu Jiang ◽  
Xiang Li ◽  
Jun Zhou ◽  
Xinyu Xu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Ph Value ◽  
Polluted Water ◽  
Dynamic Filtration ◽  
Removal Efficiencies ◽  
Filtration Experiment

Abstract In this study, omphacite media were modified by roasting at high temperature. The optimal preparation conditions were as follows: the pH value was 1, concentration of FeCl3 was 2 mol/L, roasting temperature was 450 °C and roasting time was 2 h. The specific surface area, scanning electron microscopy, and EDS analysis were used to compare the unmodified and modified omphacite, and a dynamic filtration experiment was performed to treat the slightly polluted water. The analysis of characterization results revealed that, the surface structure of the modified omphacite filter media has changed greatly. Its surface is rough and potholes have increased, and the specific surface area and adsorption capacity are significantly increased. Results of the dynamic filtration experiment revealed that the average removal efficiencies of organic matter, TOC, and turbidity by quartz sand were 21.17%, 2.2%, and 94.5%. The average removal efficiencies of organic matter, TOC, and turbidity by unmodified omphacite were 23.46%, 26.7%, and 95.2%. The average removal efficiencies of organic matter, TOC, and turbidity by modified omphacite were 50.35%, 45.5%, and 96.3%. On the whole, the filtration performance of the modified omphacite filter column is the best among three filter columns, and the recovery of the backwashing performance is also better. HIGHLIGHT At present, no application of omphacite in sewage has been found.The development of omphacite filtration technology can not only provide new market hot spots for minerals in the East China Sea area, but also have a very positive value for improving water treatment technology and enhancing water treatment efficiency.It is the intersection of mineral processing and environmental science.

SINERGI ANTARA TRIPUSAT PENDIDIKAN ISLAM DI KECAMATAN NONGGUNONG KABUPATEN SUMENEP

Edupedia ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 1-11
Author(s):  
Zainol Huda
Keyword(s):  
High School ◽  
Junior High School ◽  
Junior High ◽  
Islamic Education ◽  
Report Cards ◽  
Educational Institutions ◽  
Before And After ◽  
New Students ◽  
The Media ◽  
Three Components

The responsibility of Islamic education cannot be carried out unilaterally. Ki Hajar Dewantara stated that it requires the cooperation of three components which called as tripusat pendidikan education (center of three in education), they are families, educational institutions, and society. Those three components are one unit and complement each other. This is what happened at MTs Zainur Ridla (Islamic Junior High School Zainur Ridla) and MTs. Bustanul Ulum (Islamic Junior High School Bustanul Ulum), both of them are in Nonggunong District, Sumenep Regency. The findings in this research indicate that student’s guardians in MTs Zainur Ridla and MTs Bustanul Ulum Nonggunong have awareness about the responsibility of Islamic education. Second, all teacher councils in those two Islamic Junior High School stated that educating responsibility was on their control with habituation for their students in the form of reciting Shalawat Nariyah, reciting short surahs before the lesson began, praying before and after the lesson, shaking hands with teacher councils when coming and going home. Third, the participation of the society in realizing the responsibility of Islamic education through the media and the tradition of Kompolan. Fourth, the pattern of cooperation between madrasah (school) and student’s guardians in the form of: Home visits, inviting student’s guardians, forming madrasah supporting body, and report cards. While the pattern of cooperation between madrasah and society is their involvement in PHBI (Commemoration Islamic Feast Day) activities, their involvement in camp activities, their involvement in accepting new students, and their involvement in enforcing the discipline and regulations at madrasah.

scholarly journals Advanced treatment of effluent extended aeration process using biological aerated filter (BAF) with natural media: modification in media, design and backwashing process

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Malakootian ◽  
Ali Toolabi ◽  
Saeed Hosseini
Keyword(s):  
High Efficiency ◽  
Treatment Plant ◽  
Hospital Wastewater ◽  
Optimal Method ◽  
Metal Grid ◽  
Before And After ◽  
The Media ◽  
Aeration Process ◽  
Aerated Filter ◽  
Natural Media

AbstractBiological aerated filters (BAFs) have high filtration efficiency due to their tolerance of hydraulic and organic shocks are suitable for the treatment of complex and sanitary wastewater. In this study, for the first time, natural media of date kernel from Bam city was used as the BAF reactor media, with a meshing sand filter separated by a standard metal grid from the natural filter section used at the end of the reactor. This can be considered an innovation in the media and filtration. Aeration in the related reactor with 160 cm height was performed bilaterally as up-flow and continuously by nozzles throughout the reactor media. In this work, the actual effluent of the hospital wastewater treatment plant was employed as the inflow wastewater to the reactor, and its organic and inorganic parameters were measured before and after the treatment by the BAF reactor. The backwashing process was also studied in three ways: bottom backwashing (TB), top backwashing (BB), and top and bottom backwashing (TBBS), to determine the amount of water consumed and to achieve the desired result. According to the results obtained in this study, the removal efficiencies of inorganic and microbial contaminants, amoxicillin and azithromycin were obtained as follows: BOD5: 98.48%, COD: 92.42%, $${\text{NO}}_{3}^{ - }$$ NO 3 - : 99.4%, P: 93.3%, Coliforms: 97%, Color: 42.8%, Turbidity: 95%, Sulphate: 30%, TSS: 98.9%, Amoxicillin: 20% and azithromycin: 13%. In the backwashing process, the amount of water consumed in these three TB, BB, and TBBS methods were obtained 300, 164, and 118 L, respectively, So, TBBS method was selected as the optimal method. Based on the results obtained in this study, it is concluded that the BAF process with natural date kernel has a high efficiency in removing organic and inorganic contaminants from hospital wastewater, also the concentration of most of the effluent parameters was less or in accordance with EPA standard.

Constructing Public Opinion and Manipulating Symbols: China's Press Cover-age of the Student Movement in 1989

1995 ◽  
Vol 72 (2) ◽  
pp. 412-425 ◽  
Author(s):  
Guo-Qiang Zhang ◽  
Sidney Kraus
Keyword(s):  
Content Analysis ◽  
Public Opinion ◽  
Chinese Communist Party ◽  
Student Movement ◽  
Dominant Ideology ◽  
Tiananmen Square ◽  
The Press ◽  
Before And After ◽  
The Media ◽  
The Military

This content analysis of Chinese newspapers before and after the Tiananmen Square protest examines the symbolic representation of the Student Movement of 1989 in China. The study reveals that top leaders manipulated symbols given to the media and that these symbols rigorously highlighted the dominant ideology of the Chinese Communist Party and isolated the movement participants. Officials attempted to legitimize the military suppression of the movement. The press construction of public opinion echoed the hegemonic process created and maintained by the party structure.

scholarly journals IMMOBILIZATION OF Saccharomycess cereviceae BIOMASS ON CHITOSAN AND ITS APPLICATION AS AN ADSORBENT FOR Pb(II) ION

2011 ◽  
Vol 11 (2) ◽  
pp. 174-179 ◽  
Author(s):  
Hasri Hasri ◽  
Mudasir Mudasir ◽  
Nurul Hidayat Aprilita ◽  
Roto Roto
Keyword(s):  
Optimum Condition ◽  
Functional Groups ◽  
Contact Time ◽  
Metal Ion ◽  
Mass Ratio ◽  
Adsorption Experiment ◽  
Ion Removal ◽  
Before And After ◽  
The Difference

An application of Saccharomycess cereviceae biomass immobilized on chitosan (SC-Chi adsorbent) for Pb(II) ion removal was demonstrated. Adsorption experiment was conducted at various mass ratio of Saccharomycess cereviceae biomass to chitosan, contact time, pH of solution and concentration of cation. Total Pb(II) metal ion adsorbed was calculated from the difference of the amount of metal ion before and after adsorption which was measured by AAS. The results showed that optimum condition for adsorption of Pb(II) ion by the SC-Chi was achieved using mass ratio of Saccharomycess cereviceae to chitosan of 50% (w/w), pH solution of 7, contact time of 60 min and concentration of 25 mgL-1. The hydroxyl (-OH) and amino (-NH2) functional groups are believed to be responsible for the adsorption of Pb(II) ion by the adsorbent.

scholarly journals Klummen som politisk barometer

1970 ◽  
Author(s):  
Lene Rimestad
Keyword(s):  
Public Sphere ◽  
Private Sphere ◽  
The Public ◽  
Before And After ◽  
The Media ◽  
The Public Sphere ◽  
Two Parameters

Columns generally take up a lot of space in the media. But what can an employed journalist write in his column? How is this particular freedom managed and shaped? In this article the columns written by journalists working for Berlingske Tidende are analyzed. The analysis covers two months before and after substantial changes in the paper in 2003. Two parameters are used in the analysis: Political: Is the column pro-government, anti-government, apolitical or mixed. And what sphere does the column cover: Does the column take place in the private sphere or the public sphere? Finally the changes in the period are discussed. But initially the column as a genre is defined.

scholarly journals Improving The Knowledge Of Primary School Children On Fourth Grade Stundents About Vegetables And Fruits And Attraction Of Puzzle Media In SDN Mekarjaya I

2017 ◽  
Vol 8 (2) ◽  
pp. 134-145
Author(s):  
Wiena Arynda ◽  
Rosmida M Marbun
Keyword(s):  
School Children ◽  
Fruits And Vegetables ◽  
Fourth Grade ◽  
Primary School Children ◽  
P Value ◽  
Significant Difference ◽  
Fourth Grade Students ◽  
Before And After ◽  
The Media ◽  
Vegetables And Fruits

In Indonesia, 93.5% of the population aged ≥10 years still consume less fruits and vegetables 5 servings per day for 7 days a week (RISKESDAS, 2013).  The preliminary study conducted at SDN Mekarjaya I shows that the level of knowledge of school children about vegetables and fruits by 60% is still low and 93.3% of vegetable and fruit consumption is still lacking. In addition, SDN Mekarjaya I has never been used as a place of prior research. Therefore, it is necessary to conduct research on the knowledge of fruit vegetables in the fourth grade students of SDN Mekarjaya I. One of them is by doing counseling with the media of puzzle game. This research was conducted to know the increase of knowledge about vegetables and fruits before and after given counseling with puzzle game media in fourth grade students of SDN Mekarjaya I. This research was conducted by Pre-exsperiment method using "One group pretest and posttest" research design. Sampling by purposive sampling is 66 people. The statistical test used is paired sample t-test. Based on the results of the analysis shows that there is a significant difference of knowledge where p-value 0.000 or p <0,05 means there is a meaningful difference between before and after given counseling with puzzle game media.This puzzle game media can be developed by the teachers as a medium of learning in the classroom so that students are more motivated in following the learning process and make students do not feel bored

scholarly journals Improving the Students’ Self-confidence in Speaking English through YouTube

2021 ◽  
Vol 2 (3) ◽  
pp. 166-176
Author(s):  
Tri Pujiani ◽  
Khoirun Nisa ◽  
Benny Krisbiantoro
Keyword(s):  
Random Sampling ◽  
Research Data ◽  
Self Confidence ◽  
Before And After ◽  
Post Test ◽  
Quasi Experimental ◽  
The Media ◽  
Speaking Performance ◽  
Use Of Social Media ◽  
Paired T Test

Speaking in English is often a frightening spectre for students since it is complex and involves all language elements. Self-confidence is one of the factors that influencing speaking performance. The students’ self-confidence can be stimulated by using an interesting activity that promotes practice in relax situation. The use of social media such as YouTube may be the alternative to train the students’ self-confidence in speaking English. This research was aimed to improve the students’ self-confidence in order to overcome their problem in Speaking English by utilizing YouTube as the media. In this research, the students were assigned to post their speaking assignments on YouTube. This research was a quasi-experimental one group with pre and post-test research that utilized 43 students from English for Nursing 1 Class as the sample who were taken by using random sampling. The research data were obtained from the students’ verbal scores and self-confidence questionnaire which were compared before and after the project. The result of this research showed that there was an increase on the students’ self-confidence and speaking performance after they joined this project. Moreover, paired t-test proved that the increase was significant. Thus, it can be concluded that utilizing YouTube as the media to post the students’ work is effective to increase the students’ self-confidence as well as their speaking performance. This project should be continued and developed to maintain the students’ self-confidence and facilitate more practice for students in speaking English.

scholarly journals EFEKTIVITAS MEDIA PERMAINAN SUDOKU DALAM MENGHAFAL HURUF KANA (Menggunakan Metode Eksperimen Quasi Terhadap Siswa Japanese Club SMP Laboratorium Percontohan UPI)

2016 ◽  
Vol 1 (3) ◽  
pp. 35
Author(s):  
Konstantina Adinda Putrilani ◽  
Renariah Renariah ◽  
Neneng Sutjiati
Keyword(s):  
Data Analysis ◽  
Positive Response ◽  
Experiment Design ◽  
Writing System ◽  
Significance Level ◽  
Experiment Method ◽  
Before And After ◽  
Post Test ◽  
The Media ◽  
The One

Ketika mempelajari bahasa Jepang di sekolah, aspek dasar yang harus dipelajari siswa adalah huruf Jepang. Dalam sistem penulisan, bahasa Jepang memiliki empat huruf, yaitu huruf kanji, hiragana, katakana, dan roomaji. Tetapi sebelum tahap belajar huruf kanji, terlebih dahulu siswa mempelajari huruf hiragana dan katakana yang biasa disebut huruf kana. Huruf kana terdiri atas 96 huruf dimana huruf hiragana dan huruf katakana tersebut bentuknya mirip. Hal ini menyebabkan siswa kesulitan untuk mempelajari huruf kana. Oleh karena itu, diperlukan suatu media untuk mempermudah pembelajar mempelajari huruf kana. Salah satu media yang dapat digunakan adalah media permainan. Dalam penelitian ini, media permainan yang digunakan adalah media permainan sudoku yang sudah di modifikasi. Tujuan dari penelitian ini adalah untuk mengetahui kemampuan siswa dalam pembelajaran huruf kana, sebelum dan sesudah menggunakan media permainan sudoku. Selain itu, penelitian ini bertujuan untuk menganalisis pengaruh penggunaan media permainan sudoku terhadap pembelajaran huruf kana, dan untuk mengetahui respon siswa terhadap penggunaan media permainan sudoku. Penelitian ini menggunakan metode experimen quasi dengan desain eksperimen yaitu one group pre-test - post-test. Sampel penelitian adalah anggota Japanese Club sebanyak 20 orang yang diambil dari populasi SMP Laboratorium Percontohan UPI Bandung. Instrumen yang digunakan adalah tes, angket dan obsevasi. Berdasarkan hasil analisis data, nilai t hitung sebesar 6.53. Nilai t tabel sebesar 2.09 pada taraf signifikansi 5% dan 2.86 pada taraf signifikansi 1%. Dengan demikian, diperoleh hasil t hitung lebih besar dibandingkan nilai t tabel pada taraf signifikansi 5% (6.53 > 2.09). Hal ini menunjukkan bahwa pengguanaan media permainan sudoku dalam pembelajaran huruf kana sangat efektif. Selain itu, berdasarkan hasil analisis data angket, responden memberikan tanggapan yang positif terhadap penggunaan media permainan sudoku yaitu menarik, dan mudah diikuti. When studying Japanese at school, basic aspects must study is the Japanese letter. In its writing system, Japanese has four letters, namely kanji, hiragana, katakana, and roomaji. Before the stage of kanji learning, firstly, students have to learn hiragana and katakana which are commonly called kana. Kana, composed of 96 letters where the letter of the hiragana and katakana are barely different. This causes difficulties for students to learn kana. Therefore, we need a media to facilitate learners to learn kana. One medium that can be used are game as the learning media. This study, the media used is a sudoku game that has been modified. The purpose of this study is to acknowledge students’ ability in learning kana, before and after using the sudoku game as a media. In addition, this study also aims to analyze the influence of sudoku game usage as the media in learning kana Letters, and to find out the students' response to the use of sudoku game as a media. This study uses a quasi experiment method with the one group pre-test - post-test as experiment design. Samples were 20 students from Japanese Club members who were taken from a population of SMP Laboratorum Percontohan UPI Bandung. The instrument used was test, questionnaire and observation. Based on the data analysis, the t value at 6.53. T table at 2.09 on a significance level of 5% and 2.86 at 1% significance level. Thus, the results obtained that t value is greater than t table at a significance level of 5% (6.53> 2.09). This shows that the usage of sudoku game as media is a very effective in learning kana. In addition, based on data analysis of the questionnaire, the respondents gave a positive response to the use of media sudoku game that are attractive, and easy to follow

Effect of Quartz Sand Coated with Water-Treatment Residuals as Arsenic Adsorbent

2013 ◽  
Vol 663 ◽  
pp. 1064-1069 ◽  
Author(s):  
Chi Chuan Kan ◽  
Meng Wei Wan ◽  
Hui Ling Yang ◽  
Chih Chao Wu
Keyword(s):  
Water Treatment ◽  
Quartz Sand ◽  
Arsenic Concentration ◽  
Surface Characteristics ◽  
Isotherm Models ◽  
Water Treatment Residuals ◽  
Arsenic Adsorption ◽  
Average Pore ◽  
Before And After ◽  
Iron Manganese

In this study, quartz sand coated with water-treatment residuals was tested for its effectiveness as an arsenic adsorbent. The surface characteristics of the quartz sand before and after modification were analyzed. Different amounts of modified quartz sand were then tested for their adsorption capacity, using raw water with an arsenic concentration of 500 ppb. Analysis showed that the surface area and average pore diameter of the quartz sand had increased significantly after modification, as did the amounts of iron, manganese, and aluminum found as surface elements. Using both Freundlich and Langmuir isotherm models to measure the effectiveness of arsenic adsorption by the modified quartz sand, it was found that the latter model, for monolayer adsorption, was more appropriate.

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