The Oxidation of Ferrous Sulfate to Ferric Sulfate by Means of Air.

1923 ◽  
Vol 15 (12) ◽  
pp. 1271-1272 ◽  
Author(s):  
J. H. Reedy ◽  
J. S. Machin
Keyword(s):  
Ferrous Sulfate ◽  
Ferric Sulfate

Effect of inoculation of iron oxidizing bacteria on elution of copper from anaerobically digested sewage sludge

1998 ◽  
Vol 38 (2) ◽  
pp. 63-70 ◽  
Author(s):  
Ayumi Ito ◽  
Teruyuki Umita ◽  
Jiro Aizawa ◽  
Kumiko Kitada
Keyword(s):  
Sulfuric Acid ◽  
Sewage Sludge ◽  
Ferrous Sulfate ◽  
Ferric Sulfate ◽  
Ferrous Ion ◽  
Ferric Ion ◽  
Biological Oxidation ◽  
Iron Oxidizing Bacteria ◽  
Elution Rate ◽  
Digested Sewage Sludge

The effect of inoculation of iron oxidizing bacteria on elution of Cu from anaerobically digested sewage sludge was investigated without adding ferrous sulfate as a substrate. The inoculation of iron oxidizing bacteria to the sludge brought about the effective elution of Cu at pH 2 and 3. Ferric ion produced by the biological oxidation of ferrous ion which was eluted from the sludge or ferric ion eluted directly from the sludge and iron oxidizing bacteria caused the elution of Cu. Furthermore, both chemical and biological leachings of Cu from CuS were studied at pH 2, 3 and 4. It was found that both ferric ion and iron oxidizing bacteria could elute Cu. The elution rate of Cu with ferric ion decreased as the pH increased and two moles of Fe(III) eluted 1 mole of Cu. The biological leaching by iron oxidizing bacteria eluted Cu more effectively than the chemical one with sulfuric acid or ferric sulfate at pH 2, 3 and 4.

Stability of Salvia miltiorrhiza Bge Extract and its Application on Silk

2011 ◽  
Vol 331 ◽  
pp. 257-260
Author(s):  
Sha Sha Sun ◽  
Jie Jie Wang ◽  
Ren Cheng Tang
Keyword(s):  
Ultraviolet Light ◽  
Ferrous Sulfate ◽  
Salvia Miltiorrhiza ◽  
Ferric Sulfate ◽  
Fastness Properties ◽  
Light Fastness ◽  
Protective Properties ◽  
Acidic Conditions ◽  
Uv Protective Properties ◽  
The Stability

The stability of Salvia miltiorrhiza Bge (SMB) extract and its dyeing and ultraviolet protective properties on silk were investigated. The results indicated that SMB extract was stable at acidic conditions and stable to heat and ultraviolet light. The building-up and UV-protective properties of SMB extract for silk were good and can be enhanced by mordanting with ferrous and ferric sulfate and copper sulfate. The light fastness rating was improved using ferric sulfate, while the washing and light fastness properties were worsen using ferrous sulfate.

Process Optimization for the Production of Ferric Sulfate Coagulant by the Oxidation of Ferrous sulfate with Hydrogen Peroxide

2020 ◽  
Vol 15 (3) ◽  
Author(s):  
Veronica Barbosa Mazza ◽  
Luiz Alberto Cesar Teixeira ◽  
Ana Rosa Fonseca de Aguiar Martins ◽  
Brunno Ferreira dos Santos
Keyword(s):  
Hydrogen Peroxide ◽  
Ferrous Sulfate ◽  
Oxidation Reaction ◽  
Reaction Medium ◽  
Industrial Process ◽  
Oxidation Potential ◽  
Ferric Sulfate ◽  
Optimum Conditions ◽  
Independent Variables ◽  
Stoichiometric Amount

AbstractMotivated by the oxidative power of hydrogen peroxide and its environmentally attractive properties, the present study aimed to determine the optimum conditions for the production of ferric sulfate coagulant from ferrous sulfate The independent variables studied were the temperature (7.5–27.5 °C), amount of hydrogen peroxide (100–300 %) of the stoichiometric amount for the oxidation reaction, and dilution of the reaction medium using water (100–300 %) of the stoichiometric amount for the oxidation reaction. For the optimum conditions achieved, it was possible to obtain a conversion of 96.17 % of Fe+2 to Fe+3, using a small hydrogen peroxide excess of 50 %, resulting in a product suitable for use as a coagulant in water treatment. It was found that an oxidation potential (Eh) greater than 0.7 volts corresponded to the conversion of Fe+2 to Fe+3 greater than 90 %, indicating Eh to be useful for reaction control in an industrial process.

scholarly journals Effect on the Formation of Fe3O4with Ferrous Sulfate/Ferric Sulfate Molar Ratio and Precipitants

2011 ◽  
Vol 21 (5) ◽  
pp. 157-162
Author(s):  
Tae-Hyoung Eom ◽  
Sam-Joong Kim ◽  
Suk-Jin An ◽  
Kyoung-Hwan Oh ◽  
Dong-Soo Suhr
Keyword(s):  
Ferrous Sulfate ◽  
Ferric Sulfate ◽  
Molar Ratio

MICROBIOLOGICAL FORMATION OF BASIC FERRIC SULFATES

1973 ◽  
Vol 53 (3) ◽  
pp. 315-323 ◽  
Author(s):  
K. C. IVARSON
Keyword(s):  
Liquid Medium ◽  
Ferrous Sulfate ◽  
Metamorphic Rock ◽  
Solid Medium ◽  
Thiobacillus Ferrooxidans ◽  
Ferric Sulfate ◽  
Uranium Mine ◽  
Natural Conditions

The iron-oxidizing bacterium Thiobacillus ferrooxidans was isolated from yellow-brown deposits found in soil, shale, metamorphic rock, and a uranium mine. In addition to the bacterium and pyrite, jarosite (K Fe3(SO4)2(OH)6), a basic ferric sulfate, was found to be present in the deposits. Oxidation of ferrous sulfate by the organism in liquid medium resulted in the formation of jarosite. On a solid medium of agar containing ferrous sulfate, ammoniojarosite (NH4Fe3(SO4)2(OH)6) was formed. Because jarosite can be synthesized at 25 C and 1 atm, it" is suggested that under natural conditions T. ferrooxidans plays a role in the formation of basic ferric sulfates.

Waste Steel-Pickling Sulphuric Acid Removal Treated by Freezing Crystallization-Acid Retardation Coupling Technology

2014 ◽  
Vol 955-959 ◽  
pp. 2915-2918
Author(s):  
Jian Zhai ◽  
Chun Hua Jiang ◽  
Jian Wu
Keyword(s):  
Sulfuric Acid ◽  
Sulphuric Acid ◽  
Rotational Speed ◽  
Ferrous Sulfate ◽  
Ferric Sulfate ◽  
Optimal Conditions ◽  
Acid Retardation

Waste steel-pickling sulphuric acid was treated by freezing crystallization acid retardation coupling technology. Under the optimal conditions(temperature was -5 °C, rotational speed was 4000 rpm, TulsionA-32 as Acid Retardation reagent), the concentration of sulfuric acid reached 20～25 % and the concentration of FeSO4·7H2O fell to 15～20 g/L in the waste steel-pickling sulphuric acid which achieved the standard for sulfuric acid reuse. Polymeric ferric sulfate prepared by recyclable ferrous sulfate was accord with the first type of standard water clarfying agent polymer ferric sulfate(GB14591-2006)．

scholarly journals Effect on the Formation of Fe3O4with Ferrous Sulfate/Ferric Sulfate Molar Ratio

2011 ◽  
Vol 21 (4) ◽  
pp. 225-231 ◽  
Author(s):  
Tae-Hyoung Eom ◽  
Huynh Thanh Tuan ◽  
Sam-Joong Kim ◽  
Suk-Jin An ◽  
Kyoung-Hwan Oh ◽  
...  
Keyword(s):  
Ferrous Sulfate ◽  
Ferric Sulfate ◽  
Molar Ratio

scholarly journals Bioavailability of iron in cottonseed meal, ferric sulfate, and two ferrous sulfate by-products of the galvanizing industry

1998 ◽  
Vol 77 (9) ◽  
pp. 1388-1392 ◽  
Author(s):  
S.D. Boling ◽  
H.M. Edwards ◽  
J.L. Emmert ◽  
R.R. Biehl ◽  
D.H. Baker
Keyword(s):  
Cottonseed Meal ◽  
Ferrous Sulfate ◽  
Ferric Sulfate ◽  
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