Role of Different Leaching Methods to Arrest the Transport of Ni
            <sup>2+</sup>
            in Soil and Soil Amended with Nano Calcium Silicate

Mohammed, Syed Abu Sayeed; Sanaulla, P. F.; Alnuaim, Ahmed; Moghal, Arif Ali Baig

doi:10.1061/9780784480045.007

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Numerous studies have affirmed the potential of nanomaterials within chemical remediation methods for rapidly reducing the concentration of heavy metal ions in soil. For instance, notable soil-remediation examples included the reduction in 72% Pb(II) and 90% Cd(II) by nano-hydroxyapatite [20], 100% removal of Cu(II) and Pb(II) by a modified nano-clay [21], 97% degradation efficiency of Cd(II) and Zn(II) by a combination containing nano-iron [22], and over 88% of Ni(II) in a short period by nano-calcium silicate [23]. With the high efficiency of combined contaminants' remediation, it would offer the possibility of sustainable reuse of contaminated sites.…”

Section: Introductionmentioning

confidence: 99%

Deformation Characteristics of Combined Heavy Metals-Contaminated Soil Treated with nZVI through the Modified Slurry Consolidation Method

Fan,

Chen,

Dong

et al. 2023

Sustainability

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Nanoscale zero-valent iron (nZVI) has been widely applied to remediate heavy metal-contaminated soils and water. Its in situ treatment of combined heavy metal contaminated soil, followed by backfilling or other sustainable reutilizations, attracted attention to the treated soil’s deformation characteristics. In this study, soil samples were prepared using the modified slurry consolidation method to simulate the natural settling of backfilled soil and optimize the reactivity between nZVI and contaminants in soil. The deformation characteristics of natural soil, contaminated soil, and soil treated with varying dosages of nZVI (0.2%, 0.5%, 1%, 2%, and 5%) were investigated. Moreover, the plasticity indexes and particle-size distribution of the samples were examined through Atterberg limits and laser-diffraction particle-size analysis. After a 4 d slurry consolidation process, a typical result indicated the immobilization efficiency of all three heavy metal ions achieved over 90% with 2% nZVI. The presence of three heavy metal ions decreased the Atterberg limits and increased the compression index, permeability, and consolidation coefficient of the soil. Conversely, the introduction of nZVI increased plasticity and resulted in higher permeability, stable secondary consolidation, and less swell. Microscopically, with an increase in the dosage of nZVI, the soil aggregates transformed from a weak chemical bond with insoluble precipitates/iron oxides to larger aggregates consisting of nZVI/-soil aggregates, thereby enhancing the soil skeleton. This study shows improved permeability and deformation characteristics in nZVI-treated combined heavy metal-contaminated soil, offering valuable insights for practical nanomaterials’ in-situ treatment in engineering applications.

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Section: Introductionmentioning

confidence: 99%

Deformation Characteristics of Combined Heavy Metals-Contaminated Soil Treated with nZVI through the Modified Slurry Consolidation Method

Fan,

Chen,

Dong

et al. 2023

Sustainability

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“…A key ingredient for effective soil processing in environmental engineering is the development of the optimised design fit for experiments [33][34][35][36][37][38], since methods of soil treatment differ depending on its type (fine-, middle-, or coarse-grained) and properties (water content, density, and temperature). Existing methods of soil remediation used in environmental engineering include the evaluation of leaching potential from soil and immobilization of contaminants [39,40]. Diverse contaminants can be tested, such as toxic heavy metals, (As, Pb, Cd, Cr, Hg, Ni, and Zn) [41][42][43][44], Polycyclic Aromatic Hydrocarbon (PAH) [45], Polychlorinated biphenyl (PCB) [46], and organotin compounds Tributyltin (TBT) [47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Optimized Workflow Framework in Construction Projects to Control the Environmental Properties of Soil

Lindh

Lemenkova

2023

Algorithms

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To optimize the workflow of civil engineering construction in a harbour, this paper developed a framework of the contaminant leaching assessment carried out on the stabilized/solidified dredged soil material. The specimens included the sampled sediments collected from the in situ fieldwork in Arendal and Kongshavn. The background levels of the concentration of pollutants were evaluated to assess the cumulative surface leaching of substances from samples over two months. The contamination of soil was assessed using a structured workflow scheme on the following toxic substances, heavy metals—As, Pb, Cd, Cr, Hg, Ni, and Zn; organic compounds—PAH-16 and PCB; and organotin compounds—TBT. The numerical computation and data analysis were applied to the results of geochemical testing creating computerised solutions to soil quality evaluation in civil engineering. Data modelling enabled the estimation of leaching of the contaminants in one year. The estimated leaching of As is 0.9153 mg/m2, for Ni—2.8178 mg/m2, for total PAH-16 as 0.0507 mg/m2, and for TBT—0.00061 mg/m2 per year. The performance of the sediments was examined with regard to permeability through a series of the controlled experiments. The environmental engineering tests were implemented in the Swedish Geotechnical Institute (SGI) in a triplicate mode over 64 days. The results were compared for several sites and showed that the amount of As is slightly higher in Kongshavn than for Arendal, while the content of Cd, Cr, and Ni is lower. For TBT, the levels are significantly lower than for those at Arendal. The algorithm of permeability tests evaluated the safety of foundation soil for construction of embankments and structures. The optimized assessment methods were applied for monitoring coastal areas through the evaluated permeability of soil and estimated leaching rates of heavy metals, PHB, PACs, and TBT in selected test sites in harbours of southern Norway.

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Leaching Test Protocols to Evaluate Contaminant Response of Nano-Calcium Silicate–Treated Tropical Soils

Moghal

Sanaulla²,

Mohammed³

et al. 2023

J. Hazard. Toxic Radioact. Waste

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Role of Different Leaching Methods to Arrest the Transport of Ni ²⁺ in Soil and Soil Amended with Nano Calcium Silicate

Cited by 3 publications

References 4 publications

Deformation Characteristics of Combined Heavy Metals-Contaminated Soil Treated with nZVI through the Modified Slurry Consolidation Method

Deformation Characteristics of Combined Heavy Metals-Contaminated Soil Treated with nZVI through the Modified Slurry Consolidation Method

Optimized Workflow Framework in Construction Projects to Control the Environmental Properties of Soil

Leaching Test Protocols to Evaluate Contaminant Response of Nano-Calcium Silicate–Treated Tropical Soils

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Role of Different Leaching Methods to Arrest the Transport of Ni 2+ in Soil and Soil Amended with Nano Calcium Silicate

Cited by 3 publications

References 4 publications

Deformation Characteristics of Combined Heavy Metals-Contaminated Soil Treated with nZVI through the Modified Slurry Consolidation Method

Deformation Characteristics of Combined Heavy Metals-Contaminated Soil Treated with nZVI through the Modified Slurry Consolidation Method

Optimized Workflow Framework in Construction Projects to Control the Environmental Properties of Soil

Leaching Test Protocols to Evaluate Contaminant Response of Nano-Calcium Silicate–Treated Tropical Soils

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Product

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Role of Different Leaching Methods to Arrest the Transport of Ni ²⁺ in Soil and Soil Amended with Nano Calcium Silicate