Upcycling of construction spoil powder as partial cement replacement for sustainable cement-based materials: Properties and modification

Wu, Huixia; Yao, Pengpeng; Yang, Dingyi; Shen, Jiaxin; Ma, Zhiming

doi:10.1016/j.jclepro.2022.133361

Cited by 7 publications

(1 citation statement)

References 53 publications

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“…Therefore, the rational disposal and resource utilisation of RS has become a top priority. The current use of RS includes the production of building materials and backfilling of cave-ins [14][15][16]. However, given the relatively high transport and manufacturing costs, there are challenges to promoting these low-value-added methods.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Zn(II), Pb(II), and Cu(II) by Residual Soil-Derived Zeolite in Single-Component and Competitive Systems

Wang,

Li,

Wang

et al. 2023

Sustainability

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Using construction residual soil (RS) as the raw material, RS-derived zeolite (RSDZ) was prepared through a fusion-hydrothermal process. The adsorption performance and mechanisms of RSDZ for Pb2+, Zn2+, and Cu2+ were investigated in single-component and competitive systems. The strong RSDZ X-ray diffraction peaks at 2θ = 12.47, 17.73, 21.65, 28.18, and 33.44°, together with the results of scanning electron microscopy and Fourier transform-infrared spectroscopy (FT-IR) indicated that NaP1 zeolite (Na6Al6SiO32∙12H2O) was successfully synthesised. The Brunauer–Emmett–Teller surface area, average pore size, and cation exchange capacity increased from 9.03 m2∙g−1, 18.85 nm, and 0.12 meq∙g−1 to 47.77 m2∙g−1, 41.60 nm, and 0.61 meq∙g−1, respectively, after the fusion-hydrothermal process. The maximum Langmuir adsorption capacity of RSDZ for Zn2+, Pb2+, and Cu2+ in the unary systems was 0.37, 0.38, and 0.40 mmol·g−1, respectively. Increasing the initial solution pH facilitated the adsorption reaction, and the adsorption performance was stable when pH > 3. The distribution coefficients in the binary and ternary systems indicated that RSDZ had greater affinity for Pb2+ and Zn2+ than for Cu2+ due to the larger ionic radius and relative atomic weight of the former two cations. The relative affinity to Pb2+ and Zn2+ was related to their concentration, with more competitive adsorption of Pb2+ at concentrations higher than 0.4 mmol·L−1 in binary systems and 0.25 mmol·L−1 in ternary systems. X-ray photoelectron spectroscopy and FT-IR analyses indicated that ion exchange was the main mechanism involved in the adsorption of heavy metal ions by RSDZ, accompanied by ligand exchange.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Zn(II), Pb(II), and Cu(II) by Residual Soil-Derived Zeolite in Single-Component and Competitive Systems

Wang,

Li,

Wang

et al. 2023

Sustainability

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Reusing thermoactivated construction waste spoil as sustainable binder for durable concrete: Microstructure and chloride transport

et al. 2023

Construction and Building Materials

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Development of sustainable geopolymer materials made with ground geopolymer waste powder as renewable binder up to 100%

Liang

Yang

et al. 2023

Construction and Building Materials

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Upcycling of construction spoil powder as partial cement replacement for sustainable cement-based materials: Properties and modification

Cited by 7 publications

References 53 publications

Adsorption of Zn(II), Pb(II), and Cu(II) by Residual Soil-Derived Zeolite in Single-Component and Competitive Systems

Adsorption of Zn(II), Pb(II), and Cu(II) by Residual Soil-Derived Zeolite in Single-Component and Competitive Systems

Reusing thermoactivated construction waste spoil as sustainable binder for durable concrete: Microstructure and chloride transport

Development of sustainable geopolymer materials made with ground geopolymer waste powder as renewable binder up to 100%

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