Sulfate Removal from Alunitic Kaolin by Chemical Method

2005 ◽  
Vol 44 (9) ◽  
pp. 3213-3219 ◽  
Author(s):  
Mine Özdemir ◽  
Halil Çetişli
Keyword(s):  
Chemical Method ◽  
Sulfate Removal ◽  
Alunitic Kaolin

A CHEMICAL METHOD FOR THE DETERMINATION OF 2-HYDROXYOESTRONE IN HUMAN URINE

1973 ◽  
Vol 71 (4_Suppl) ◽  
pp. S110
Author(s):  
H. P. Gelbke ◽  
R. Knuppen
Keyword(s):  
Human Urine ◽  
Chemical Method

ECOLOGY AND CHEMICAL METHOD OF PROTECTING BEAN CROPS FROM WEEDS IN THE MOUNTAIN ZONE OF NORTH OSSETIA-ALANIA

2020 ◽  
Vol 15 (1) ◽  
pp. 65-72
Author(s):  
Anna Shalygina ◽  
◽  
Dmitry Mamiev ◽  
Albina Tedeeva ◽  
Taisiya Batsazova ◽  
...  
Keyword(s):  
Chemical Method ◽  
Mountain Zone ◽  
North Ossetia

Biological sulfate removal in an acidogenic bioreactor with an ultrafiltration membrane system

1998 ◽  
Vol 38 (4-5) ◽  
pp. 513-520 ◽  
Author(s):  
O. Mizuno ◽  
H. Takagi ◽  
T. Noike
Keyword(s):  
Sulfate Reduction ◽  
Membrane Filtration ◽  
Membrane Bioreactor ◽  
Volatile Fatty Acids ◽  
Membrane System ◽  
Organic Substrate ◽  
Ultrafiltration Membrane ◽  
Sulfate Concentration ◽  
Sulfate Removal ◽  
Chemostat Reactor

The biological sulfate removal in the acidogenic bioreactor with an ultrafiltration membrane system was investigated at 35°C. Sucrose was used as the sole organic substrate. The sulfate concentration in the substrate ranged from 0 to 600mgS·1−1. The chemostat reactor was operated to compare with the membrane bioreactor. The fouling phenomenon caused by FeS precipitate was observed at higher concentration of sulfate. However, it was possible to continuously operate the membrane bioreactor by cleaning the membrane. The efficiency of sulfate removal by sulfate reduction reached about 100% in the membrane bioreactor, and 55 to 87% of sulfide was removed from the permeate by the membrane filtration. The composition of the metabolite was remarkably changed by the change in sulfate concentration. When the sulfate concentration increased, acetate and 2-proponol significantly increased while n-butyrate and 3-pentanol decreased. The sulfate-reducing bacteria play the role as acetogenic bacteria consuming volatile fatty acids and alcohols as electron donors under sulfate-rich conditions. The results show that the acidogenesis and sulfate reduction simultaneously proceed in the membrane bioreactor.

Solvation of ions by dipolar aprotic solvents and water. A CNDO/2 study

1985 ◽  
Vol 50 (11) ◽  
pp. 2493-2508 ◽  
Author(s):  
Petr Kyselka ◽  
Zdeněk Havlas ◽  
Ivo Sláma
Keyword(s):  
Binary Mixtures ◽  
Quantum Chemical ◽  
Chemical Method ◽  
Molecular Structures ◽  
Dimethyl Sulphoxide ◽  
Ternary Mixtures ◽  
Aprotic Solvents ◽  
Quantum Chemical Method ◽  
Solvation Of Ions ◽  
Dipolar Aprotic Solvents

Solvation of Li+, Be2+, Na+, Mg2+, and Al3+ ions has been studied in binary mixtures with dimethyl sulphoxide, dimethylformamide, acetonitrile and water, and in ternary mixtures of the organic solvents with water. The CNDO/2 quantum chemical method was used to calculate the energies of solvation, molecular structures and charge distributions for the complexes acetonitrile...ion (1:1, 2:1, 4:1), dimethyl sulphoxide...ion (1:1), dimethylformamide...ion (1:1), and acetonitrile (dimethyl sulphoxide, dimethylformamide)...ion...water (1:1:1).

Sulfate removal using rubber wood ash to enhance biogas production from sulfate-rich wastewater generated from a concentrated latex factory

2021 ◽  
pp. 108084
Author(s):  
Marisa Raketh ◽  
Rattana Jariyaboon ◽  
Prawit Kongjan ◽  
Eric Trably ◽  
Alissara Reungsang ◽  
...  
Keyword(s):  
Biogas Production ◽  
Wood Ash ◽  
Rubber Wood ◽  
Sulfate Removal
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