Equilibrium and kinetics studies of hexavalent chromium biosorption on a novel green macroalgae Enteromorpha sp.

2015 ◽  
Vol 42 (2) ◽  
pp. 1275-1294 ◽  
Author(s):  
S. Rangabhashiyam ◽  
E. Suganya ◽  
Alen Varghese Lity ◽  
N. Selvaraju
Keyword(s):  
Hexavalent Chromium ◽  
Green Macroalgae ◽  
Kinetics Studies ◽  
Equilibrium And Kinetics ◽  
Chromium Biosorption

scholarly journals Silica Removal from a Paper Mill Effluent by Adsorption on Pseudoboehmite and γ-Al2O3

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2031
Author(s):  
Ruben Miranda ◽  
Isabel Latour ◽  
Angeles Blanco
Keyword(s):  
Paper Mill ◽  
Ph Adjustment ◽  
Paper Mill Effluent ◽  
Kinetics Studies ◽  
Silica Removal ◽  
Industrial Water Use ◽  
Optimum Ph ◽  
Initial Ph ◽  
Equilibrium And Kinetics ◽  
Kinetics Of

Effluent reuse is a common practice for sustainable industrial water use. Salt removal is usually carried out by a combination of membrane processes with a final reverse osmosis (RO). However, the presence of silica limits the RO efficiency due to its high scaling potential and the difficulty of cleaning the fouled membranes. Silica adsorption has many advantages compared to coagulation and precipitation at high pHs: pH adjustment is not necessary, the conductivity of treated waters is not increased, and there is no sludge generation. Therefore, this study investigates the feasibility of using pseudoboehmite and its calcination product (γ-Al2O3) for silica adsorption from a paper mill effluent. The effect of sorbent dosage, pH, and temperature, including both equilibrium and kinetics studies, were studied. γ-Al2O3 was clearly more efficient than pseudoboehmite, with optimal dosages around 2.5–5 g/L vs. 7.5–15 g/L. The optimum pH is around 8.5–10, which fits well with the initial pH of the effluent. The kinetics of silica adsorption is fast, especially at high dosages and temperatures: 80–90% of the removable silica is removed in 1 h. At these conditions, silica removal is around 75–85% (<50 mg/L SiO2 in the treated water).

Biosorption of copper ions from aqueous solution using Chlorella pyrenoidosa: Optimization, equilibrium and kinetics studies

2019 ◽  
Vol 145 ◽  
pp. 119-129 ◽  
Author(s):  
V.R. Moreira ◽  
Y.A.R. Lebron ◽  
S.J. Freire ◽  
L.V.S. Santos ◽  
F. Palladino ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Copper Ions ◽  
Chlorella Pyrenoidosa ◽  
Kinetics Studies ◽  
Equilibrium And Kinetics

A facile approach of adsorption of acid blue 9 on aluminium silicate-coated Fuller's Earth––Equilibrium and kinetics studies

2020 ◽  
Vol 19 ◽  
pp. 100503
Author(s):  
Y. Subbareddy ◽  
R. Naresh Kumar ◽  
B.K. Sudhakar ◽  
K. Rayappa Reddy ◽  
Surendra Kumar Martha ◽  
...  
Keyword(s):  
Kinetics Studies ◽  
Equilibrium And Kinetics ◽  
Fuller’S Earth ◽  
Acid Blue ◽  
Aluminium Silicate
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