Preparation and characterization of lignin-derived hard templated carbon(s): Statistical optimization and methyl orange adsorption isotherm studies

2021 ◽  
Vol 342 ◽  
pp. 125924
Author(s):  
Komal Saini ◽  
Abhisek Sahoo ◽  
Bijoy Biswas ◽  
Avnish Kumar ◽  
Thallada Bhaskar
2018 ◽  
Vol 14 (2) ◽  
pp. 221-234
Author(s):  
Ahmed Namah Mohamed ◽  
◽  
Jafer Fahdel Odah ◽  
Haider Tawfiq Naeem

2009 ◽  
Vol 2 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Fatemeh F. Bamoharram ◽  
Majid M. Heravi ◽  
Mina Roushani ◽  
Maryam R. Toosi ◽  
Ladan Jodeyre

2019 ◽  
Vol 7 (2) ◽  
pp. 240-246
Author(s):  
Kaur Harpreet ◽  
Kaur Harpreet ◽  
Vandana Kamboj ◽  
Vandana Kamboj

Water is the most crucial thing to mankind and so its contamination by various agencies is posing a threat to the natural balance. So, in the present work, the efficiency of various adsorbents derived from plant waste, to remove different dyes from aqueous solution was evaluated. Parameters for study were contact time, concentration and pH. Various combinations of plant ashes were used for the study. It was found that adsorbent prepared from the combination of orange peels, pomegranate and banana peels ashes, exhibited good adsorption capacity for methylene blue, congo red and crystal violet. All these dyes were completely removed from the aqueous solution while methyl orange was not removed. Congo red was removed completely within 40 min of contact with the adsorbent while methyl orange took 3 hrs to be removed to the extent of 48% only. The adsorption coefficient of congo red was found to be 2.33 while value for methylene blue and crystal violet was 1 and 1.66 respectively. The characterization of adsorbent was done by Scanning Electron Microscopy and IR spectroscopy. SEM image revealed the surface of adsorbent to be made of differential pores. From the results it became evident that the low-cost adsorbent could be used as a replacement for costly traditional methods of removing colorants from water.


2019 ◽  
Vol 4 (2) ◽  
pp. 71-76
Author(s):  
Pemta Tia Deka

ABSTRAKPencemaran zat warna di lingkungan perairan semakin meningkat. Pencemaran tersebut dapat berasal berbagai sumber diantaranya limbah rumah tangga atau industri farmasi. Zat warna metil jingga merupakan salah satu zat yang digunakan pada industri farmasi dan dapat membahayakan kesehatan manusia sehingga perlu adanya pengolahan yang baik terhadap limbah tersebut. Tujuan dari penelitian ini adalah membandingkan proses fotodegradasi dari zat warna metil jingga menggunakan katalis Fe2O3-zeolit, sinar-UV maupun hanya memakai zeolit. Hasil Karakterisasi katalis Fe2O3-Zeolit dengan menggunakan metilen biru diperoleh luas permukaan spesifik 236,80 m2/g, sedangkan uji menggunakan spektrofotometer FTIR didapatkan bilangan gelombang 520,74 cm-1 yang merupakan karakteristik dari Fe2O3-zeolit. Berdasarkan studi pendahuluan diperoleh kondisi optimum yaitu konsentrasi metil jingga 25 ppm, katalis Fe2O3-zeolit 23,40 mmol/g zeolit serta lama penyinaran 80 menit. Uji fotokatalis dilakukan dengan cara mendispersikan 150 mg Fe2O3-zeolit, 50 mg zeolit teraktifasi ke dalam 60 mL larutan metil jingga, kemudian dimasukkan ke reaktor uv-fotokatalitik. Hasil persen degradasi terbesar diperoleh pada perlakuan penambahan katalis, sinar uv dan pengocokan yaitu 62,96%. Apabila hanya digunakan logam Fe(III) maka didapatkan persen degradasi 36,8%. Kemudian, perlakuan gelap tanpa sinar uv diperoleh persen degradasi paling kecil yaitu 14,82%.Kata kunci: fotodegradasi, zeolit, sinar-Uv, Fe2O3-zeolit, metil jinggaABSTRACTWater contamination in aquatic environment get increased. This contaminaton could happen from various source like home waste or pharmacy industry waste. Methyl orange is one of materials that used in pharmacy industry which could dangering human health so it must be take a good treatment for this waste. The aim of this research is to compare some photocatalytic activity for methyl orange using Fe2O3-zeolit catalyst, uv light and just zeolite. Beside that, Characterization of this catalyst is done by infrared spectrofotometry and surface area by metilen blue. The specific surface area characterization result is 236,80 m2/g then infrared spectrophotometer showed wavennumber at 520,74 cm-1 that specific for Fe2O3-zeolit. Based on preliminary research showed optimum condition at 25 ppm of methyl orange, Fe2O3-zeolit 23,40 mmol/g zeolite and uv radiaton time is 80 minutes.Photodegradation test is done by disper 150 g Fe2O3-zeolit in 60 ml methyl orange then placed in photocatalitic reactor and give uv light. The highest percent degradation result is 62,96%. By adding zeolite, catalyst and shaked. In other hand, the lowest result is 14,82% from dark condition means no uv lightKeywords: Photodegradation, zeolit, Fe2O3-zeolit, methyl orange


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