scholarly journals CCLV.—The colour changes of methyl-orange and methyl-red in acid solution

1910 ◽  
Vol 97 (0) ◽  
pp. 2477-2490 ◽  
Author(s):  
Henry Thomas Tizard
Keyword(s):  
Methyl Orange ◽  
Acid Solution ◽  
Methyl Red ◽  
Colour Changes

scholarly journals Oxalate Intercalated Mg/Cr Layered Double Hydroxide as Adsorbent of Methyl Red and Methyl Orange From Aqueous Solution

2021 ◽  
Vol 22 (3) ◽  
pp. 71-81
Author(s):  
Arini Fousty Badri ◽  
Novie Juleanti ◽  
Neza Rahayu Palapa ◽  
Yuliza Hanifah ◽  
Risfidian Mohadi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Layered Double Hydroxide ◽  
Methyl Red ◽  
Double Hydroxide

scholarly journals PEMBUATAN BIOSORBEN DARI BIJI PEPAYA (Carica papaya L) UNTUK PENYERAPAN ZAT WARNA

2017 ◽  
Vol 6 (2) ◽  
pp. 7-13
Author(s):  
Siswarni MZ ◽  
Lara Indra Ranita ◽  
Dandri Safitri
Keyword(s):  
Sulfuric Acid ◽  
Methyl Orange ◽  
Surface Area ◽  
Acid Concentration ◽  
Sulfuric Acid Concentration ◽  
Methyl Violet ◽  
Methyl Red ◽  
Drying Time ◽  
Adsorption Time ◽  
Papaya Seeds

Biosorbent is a material that has a pore - pore lot, where the adsorption process can take place on the pore walls or occur in certain regions of the particles. Preparation from papaya seeds biosorbent using H2SO4 as an activator, and then used as a textile dye absorption, namely methyl orange, methyl violet and methyl red. This study aims to determine the optimum conditions in the manufacturing biosorbent from papaya seeds. Analysis is iodine number, surface area, and test the ability of sarap to dyes (methyl orange, methyl violet and methyl red). In the manufacture biosorbent of this papaya seeds, the method used is chemical activation process. This study uses papaya seeds as raw material and sulfuric acid as an activator. The concentration of sulfuric acid used 5%, 7%, 10% and the drying time of 30 minutes, 60 minutes, 90 minutes, and 120 minutes. Biosorbent mass of 0.5 g (2.5% of 20 ml), 1.0 g (5% of 20 ml) and 1.5 g (7.5% of 20 ml) with adsorption time of 20 minutes, 30 minutes, and 40 minutes for the absorption of the dye. The results showed the highest iodine gained 482.22 mg / g on the drying time of 120 minutes and a sulfuric acid concentration of 10% and the highest surface area was obtained 33.43556 m2 / g on the drying time of 120 minutes and a sulfuric acid concentration of 10%. The analysis results of the adsorption capacity for methyl violet dye that is 9.547 mg / g on biosorbent mass of 1.0 g and the adsorption time of 40 minutes..

scholarly journals β-Cyclodextrin- and adamantyl-substituted poly(acrylate) self-assembling aqueous networks designed for controlled complexation and release of small molecules

2017 ◽  
Vol 13 ◽  
pp. 1879-1892 ◽  
Author(s):  
Liang Yan ◽  
Duc-Truc Pham ◽  
Philip Clements ◽  
Stephen F Lincoln ◽  
Jie Wang ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Small Molecules ◽  
Controlled Drug Release ◽  
Methyl Red ◽  
Dialysis Membrane ◽  
Factors Affecting ◽  
H Nmr ◽  
Self Assembling ◽  
Vis Spectroscopy ◽  
Insight Into

Three aqueous self-assembling poly(acrylate) networks have been designed to gain insight into the factors controlling the complexation and release of small molecules within them. These networks are formed between 8.8% 6A-(2-aminoethyl)amino-6A-deoxy-6A-β-cyclodextrin, β-CDen, randomly substituted poly(acrylate), PAAβ-CDen, and one of the 3.3% 1-(2-aminoethyl)amidoadamantyl, ADen, 3.0% 1-(6-aminohexyl)amidoadamantyl, ADhn, or 2.9% 1-(12-aminododecyl)amidoadamantyl, ADddn, randomly substituted poly(acrylate)s, PAAADen, PAAADhn and PAAADddn, respectively, such that the ratio of β-CDen to adamantyl substituents is ca. 3:1. The variation of the characteristics of the complexation of the dyes methyl red, methyl orange and ethyl orange in these three networks and by β-cyclodextrin, β-CD, and PAAβ-CDen alone provides insight into the factors affecting dye complexation. The rates of release of the dyes through a dialysis membrane from the three aqueous networks show a high dependence on host–guest complexation between the β-CDen substituents and the dyes as well as the structure and the viscosity of the network as shown by ITC, 1H NMR and UV–vis spectroscopy, and rheological studies. Such networks potentially form a basis for the design of controlled drug release systems.

Efficient template based synthesis of Ni nanorods by etching porous alumina for their enhanced photocatalytic activities against Methyl Red and Methyl Orange dyes

2019 ◽  
Vol 1184 ◽  
pp. 316-323 ◽  
Author(s):  
Shakeel Ahmad Khan ◽  
Sammia Shahid ◽  
Maryam Nazir ◽  
Sadia Kanwal ◽  
Sabah Zaman ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Porous Alumina ◽  
Methyl Red ◽  
Photocatalytic Activities

Microbial conversion of selected azo dyes and their breakdown products

2006 ◽  
Vol 53 (11) ◽  
pp. 163-171 ◽  
Author(s):  
N. Yemashova ◽  
S. Kalyuzhnyi
Keyword(s):  
Methyl Orange ◽  
Activated Sludge ◽  
Azo Dyes ◽  
Anthranilic Acid ◽  
Methyl Red ◽  
Acid Orange 7 ◽  
Microbial Conversion ◽  
Aerobic Conditions ◽  
Acid Orange ◽  
Sulphanilic Acid

Four selected azo dyes (acid orange 6, acid orange 7, methyl orange and methyl red) were completely decolourised in the presence of anaerobic granular sludge, while only methyl red was degraded in aerobic conditions using a conventional activated sludge. Additional experiments with culture broth devoid of cells showed that anaerobic decolourisation of azo dyes was performed by extracellular reducing agents produced by anaerobic bacteria. This was further confirmed by abiotic experiments with sulphide and NADH. The presence of redox mediators such as riboflavin led to dramatic acceleration of the anaerobic biodecolourisation process. The azo dye reduction products were found to be sulphanilic acid and 4-aminoresorcinol for acid orange 6; sulphanilic acid and 1-amino-2-naphthol for acid orange 7; N,N-dimethyl-1,4-phenylenediamine and sulphanilic acid for methyl orange; and N,N-dimethyl-1,4-phenylenediamine and anthranilic acid for methyl red. Anaerobic toxicity assays showed that the azo dyes were more toxic than their breakdown products (aromatic amines), except 1-amino-2-naphthol. In the presence of activated sludge, only anthranilic acid was completely mineralised while sulphanilic acid was persistent. 4-aminoresorcinol, 1-amino-2-naphthol and N,N-dimethyl-1,4-phenylenediamine underwent autooxidation in aerobic conditions yielding coloured polymeric products. On the contrary, in the presence of granular methanogenic sludge, 4-aminoresorcinol, 1-amino-2-naphthol and anthranilic acid were quantitatively methanised, sulphanilic acid was partially (70%) mineralised while N,N-dimethyl-1,4-phenylenediamine was only demethylated producing 1,4-phenylenediamine as an end product.

scholarly journals Titanium dioxide as a Catalyst for Photodegradation of Various Concentrations of Methyl Orange and Methyl Red dyes using Hg Vapour Lamp with Constant pH

2018 ◽  
Vol 34 (2) ◽  
pp. 1000-1010 ◽  
Author(s):  
A. Kistan ◽  
V. Kanchana ◽  
L. Sakayasheela ◽  
J. Sumathi ◽  
A. Premkumar ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Methyl Orange ◽  
Methyl Red ◽  
Constant Ph
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