Elimination of Hazard Cadmium Ions from Simulated Groundwater Using Hydroxyapatite Coated Filter Cake Made of Sewage Sludge and Cement Kiln Dust

2021 ◽  
Author(s):  
Ayad A. H. Faisal ◽  
Dooraid N. Ahmed ◽  
B. Saleh ◽  
Asif Afzal ◽  
Gaurav Sharma
Keyword(s):  
Sewage Sludge ◽  
Filter Cake ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Cadmium Ions ◽  
Simulated Groundwater ◽  
Kiln Dust

Limed sewage sludge effects on nutrient status and metal fractions in acidic soils

1999 ◽  
Vol 79 (1) ◽  
pp. 173-182 ◽  
Author(s):  
R. R. Simard ◽  
S. Beauchemin ◽  
M. R. Laverdière
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Water Soluble ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Acidic Soils ◽  
Mn Toxicity ◽  
Extractable P ◽  
The Impact ◽  
Kiln Dust

The potential impacts of limed sludge on nutrient and heavy metal bioavailability must be studied for their safe use on acidic soils. The objective of this study was to assess the impact of limed sludges on six acidic soils from eastern Canada. CaCO3 and raw sewage sludges (RSS) stabilized with either CaO (CaO + S) or cement kiln dust (CKD + S) were added to soils in amount necessary to reach pH 6.5 and the mixtures were then incubated for 64 d. CaO + S treatments were the most efficient to neutralize soil acidity. After 10 d of incubation, the Sr-citrate extractable P was significantly increased by the CaO + S treatment in low P sorption soils. The extractable K, Zn and Cu contents were also slightly increased by CaO + S compared to CaCO3 whereas CKD + S resulted in an excessive soil exchangeable K content. After 64 d, labile Al content was decreased by all liming amendments. RSS and CaO + S tended to increase labile Cu and Mn contents. The RSS increased NaOH-extractable Cu but the treatments had no significant effects on the labile and stable forms of heavy metals. A combination of CaO + CKD to stabilize sewage sludge would be more suitable to provide appropriate levels of P and K without resulting in large increases in extractable heavy metal contents. Key words: pH, extractable P and K, cement kiln dust, Al and Mn toxicity, Cu fractions, water-soluble metals

scholarly journals USING CEMENT KILN DUST AS LOW PERMEABLE BARRIER FOR RESTRICTION THE PROPAGATION OF CADMIUM IONS TOWARDS THE WATER RESOURCES

2020 ◽  
Vol 51 (6) ◽  
pp. 1581-1592
Author(s):  
Ibreesam & Faisal
Keyword(s):  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Sorption Data ◽  
Cadmium Ions ◽  
Operational Conditions ◽  
Batch Tests ◽  
Sand Aquifer ◽  
Initial Ph ◽  
Kiln Dust ◽  
Maximum Removal

This study was aimed to determine the interaction of cement kiln dust - aqueous solution contaminated with Cadmium ions was studied through set of batch tests with operational conditions of contact time ≤120 min, sorbent dosage from 0.05 to 1 g/100 mL and agitation speed ranged from 50 to 300 rpm for initial concentration of 50 mg/L with initial pH of 3 to simulate the acetogenic phase in the sanitary landfill. The best values of these conditions are 1 hr, 0.7 g/100 mL and 250 rpm respectively, To obtain maximum removal efficiencies of 97.6%. Freundlich and Langmuir models have a high ability in the representation of the sorption data with determination coefficient (R2) greater than 0.97 and the sorption capacity reached to 84.1 mg/g. This certifies that the physical sorption and chemisorption can occur together to remove Cadmium ions from the aqueous solutions. Tests elucidated that the average coefficient of the hydraulic conductivity is equal to 9.7×10-13 m/s and this is suitable for LPB. Finally, COMSOL Multiphysics 3.5a package was able to simulate the distribution of cadmium ions concentrations within two-dimensional physical model packed with sand aquifer and CKD LPB. A good matching between model predictions and experimental results are recognized at selected points up and down gradient of LPB.    

Selenium in Swiss chard grown on sewage sludge-cement kiln dust amended soil

Chemosphere ◽  
1993 ◽  
Vol 27 (8) ◽  
pp. 1461-1463 ◽  
Author(s):  
Walter H. Gutenmann ◽  
G.James Doss ◽  
Donald J. Lisk
Keyword(s):  
Sewage Sludge ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Swiss Chard ◽  
Kiln Dust ◽  
Amended Soil
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