A novel eco-friendly porous concrete fabricated with coal ash and geopolymeric binder: Heavy metal leaching characteristics and compressive strength

2015 ◽  
Vol 79 ◽  
pp. 173-181 ◽  
Author(s):  
J.G. Jang ◽  
Y.B. Ahn ◽  
H. Souri ◽  
H.K. Lee
Keyword(s):  
Heavy Metal ◽  
Compressive Strength ◽  
Coal Ash ◽  
Metal Leaching ◽  
Porous Concrete ◽  
Heavy Metal Leaching ◽  
Leaching Characteristics

scholarly journals Direct reuse of two deep-dewatered sludge cakes without a solidifying agent as landfill cover: geotechnical properties and heavy metal leaching characteristics

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3823-3830 ◽  
Author(s):  
Jiakuan Yang ◽  
Shinan Zhang ◽  
Yafei Shi ◽  
Chao Li ◽  
Wenbo Yu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Geotechnical Properties ◽  
Metal Leaching ◽  
Curing Time ◽  
Heavy Metal Leaching ◽  
Landfill Cover ◽  
Leaching Characteristics ◽  
Dewatered Sludge

The skeleton builders improve the geotechnical properties and heavy metal leaching characteristics of the dewatered sludge cakes which make them appropriate for re-use as landfill cover materials after a certain curing time.

Compressive strength and heavy metal leaching behaviour of mortars containing spent catalyst

2001 ◽  
Vol 19 (5) ◽  
pp. 456-464 ◽  
Author(s):  
Ubolluk Rattanasak ◽  
Chai Jaturapitakkul ◽  
Tippaban Sudaprasert
Keyword(s):  
Heavy Metal ◽  
Compressive Strength ◽  
Metal Leaching ◽  
Spent Catalyst ◽  
Heavy Metal Leaching ◽  
Leaching Behaviour

Properties and heavy metal leaching characteristics of leachate sludge derived biochar

2021 ◽  
Author(s):  
Huiqin Zhang ◽  
Zixian Wang ◽  
Chenyu Du ◽  
Wenlong Liu ◽  
Andrea R. Gerson ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Leaching ◽  
Heavy Metal Leaching ◽  
Leaching Characteristics

scholarly journals Immobilization of Heavy Metals in Boroaluminosilicate Geopolymers

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 214
Author(s):  
Piotr Rożek ◽  
Paulina Florek ◽  
Magdalena Król ◽  
Włodzimierz Mozgawa
Keyword(s):  
Mechanical Properties ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Compressive Strength ◽  
Phase Composition ◽  
Molar Ratio ◽  
Metal Leaching ◽  
Heavy Metal Leaching ◽  
Composition Structure ◽  
Structure And Microstructure

Boroaluminosilicate geopolymers were used for the immobilization of heavy metals. Then, their mechanical properties, phase composition, structure, and microstructure were investigated. The addition of borax and boric acid did not induce the formation of any crystalline phases. Boron was incorporated into the geopolymeric network and caused the formation of N–B–A–S–H (hydrated sodium boroaluminosilicate) gel. In the range of a B/Al molar ratio of 0.015–0.075, the compressive strength slightly increased (from 16.1 to 18.7 MPa), while at a ratio of 0.150, the compressive strength decreased (to 12 MPa). Heavy metals (lead and nickel) were added as nitrate salts. The loss of the strength of the geopolymers induced by heavy metals was limited by the presence of boron. However, it caused an increase in heavy metal leaching. Despite this, heavy metals were almost entirely immobilized (with immobilization rates of >99.8% in the case of lead and >99.99% in the case of nickel). The lower immobilization rate of lead was due to the formation of macroscopic crystalline inclusions of PbO·xH2O, which was vulnerable to leaching.

Sign in / Sign up

Export Citation Format

Share Document