Evaluation of phosphorus adsorption from aqueous solution by Ca-biochar

2021 ◽  
Author(s):  
Amanda Ribeiro da Rocha ◽  
Glaucia Pantano
Keyword(s):  
Aqueous Solution ◽  
Phosphorus Adsorption

scholarly journals Film based on magnesium impregnated biochar/cellulose acetate for phosphorus adsorption from aqueous solution

RSC Advances ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 5620-5627 ◽  
Author(s):  
Marina de Carvalho Eufrásio Pinto ◽  
Demetrius David da Silva ◽  
Ana Luiza Amorim Gomes ◽  
Victor dos Santos Azevedo Leite ◽  
Allan Robledo Fialho e Moraes ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Cellulose Acetate ◽  
Hybrid Film ◽  
Phosphorus Adsorption ◽  
P Adsorption

New hybrid film formed by biopolymer cellulose acetate and biochar for P adsorption in aqueous solution.

Preparation and characterization of lanthanum(III) loaded granular ceramic for phosphorus adsorption from aqueous solution

2012 ◽  
Vol 43 (5) ◽  
pp. 783-789 ◽  
Author(s):  
Nan Chen ◽  
Chuanping Feng ◽  
Zhenya Zhang ◽  
Ruopeng Liu ◽  
Ya Gao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Phosphorus Adsorption

Recovery of high purity phosphorus from municipal wastewater secondary effluent by a high-speed adsorbent

2008 ◽  
Vol 58 (8) ◽  
pp. 1601-1607 ◽  
Author(s):  
I. Midorikawa ◽  
H. Aoki ◽  
A. Omori ◽  
T. Shimizu ◽  
Y. Kawaguchi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Calcium Phosphate ◽  
High Purity ◽  
High Speed ◽  
Municipal Wastewater ◽  
Packed Column ◽  
Space Velocity ◽  
Phosphorus Recovery ◽  
Secondary Effluent ◽  
Phosphorus Adsorption

High purity phosphorus was recovered from municipal wastewater secondary effluent as phosphate, using a newly developed phosphorus adsorption and recovery system. A high-speed adsorbent having a unique porous structure was used in this system. The secondary effluent, showing total phosphorus (TP) of 0.1–2.1 mg P/L, was passed through an adsorbent packed column at high space velocity (SV) of 15 h−1. The TP of the treated water was as low as 0.02–0.04 mg P/L, indicating that 97% of phosphorus in the secondary effluent was removed. The removed phosphorus was desorbed from the adsorbent by passing a sodium hydroxide aqueous solution through the column. Calcium hydroxide was added to this solution to precipitate the phosphorus as calcium phosphate. This precipitate was neutralized with hydrochloric acid aqueous solution, washed with water, and then solid–liquid separation was performed for the phosphorus recovery. The main constituent of the recovered phosphorus was apatite-type calcium phosphate, with 16% phosphorus content, which matched that of high-grade phosphorus ore. The hazardous elements content of the recovered phosphorus was exceedingly low. Therefore the recovered phosphorus can be applied to an alternative for phosphorus ore, or to a phosphate fertilizer.

Structures Formed by Cryoprotective Agents Used in Freezc-Etching

1971 ◽  
Vol 29 ◽  
pp. 448-449
Author(s):  
G. G. Cocks ◽  
C. E. Cluthe
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Oxide ◽  
Liquid Nitrogen Temperature ◽  
Ice Crystals ◽  
Etching Technique ◽  
Structural Constituent ◽  
Cryoprotective Agents ◽  
Quick Freezing ◽  
Freeze Etching ◽  
Fractured Surface

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.

Sign in / Sign up

Export Citation Format

Share Document