Assessment of the long-term leaching characteristics of cement-slag stabilized/solidified contaminated sediment

Zhang, Wanlu; Zhao, Lun‐Yang; Yuan, Zaijian; Li, Ding-Qiang; Morrison, Liam

doi:10.1016/j.chemosphere.2020.128926

Cited by 39 publications

(15 citation statements)

References 47 publications

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“…There are several S/S processes and methods proposed, tested, and implemented in practice [ 31 , 32 , 33 , 34 ]. These solutions, however, still need a lot of research to increase their effectiveness/performance and long-term effects [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Management of Solid Waste Containing Fluoride—A Review

2022

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Technological and economic development have influenced the amount of post-production waste. Post-industrial waste, generated in the most considerable amount, includes, among others, waste related to the mining, metallurgical, and energy industries. Various non-hazardous or hazardous wastes can be used to produce new construction materials after the “solidification/stabilization” processes. They can be used as admixtures or raw materials. However, the production of construction materials from various non-hazardous or hazardous waste materials is still very limited. In our opinion, special attention should be paid to waste containing fluoride, and the reuse of solid waste containing fluoride is a high priority today. Fluoride is one of the few trace elements that has received much attention due to its harmful effects on the environment and human and animal health. In addition to natural sources, industry, which discharges wastewater containing F− ions into surface waters, also increases fluoride concentration in waters and pollutes the environment. Therefore, developing effective and robust technologies to remove fluoride excess from the aquatic environment is becoming extremely important. This review aims to cover a wide variety of procedures that have been used to remove fluoride from drinking water and industrial wastewater. In addition, the ability to absorb fluoride, among others, by industrial by-products, agricultural waste, and biomass materials were reviewed.

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Section: Introductionmentioning

confidence: 99%

Management of Solid Waste Containing Fluoride—A Review

2022

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“…The AAMs exhibit distinct leaching characteristics, encompassing surface wash-off, diffusion, and dissolution. Existing analytical solutions predominantly relied on assumptions about the type of leaching . The literature documented three broad analytical models, namely: (1) the first-order reaction model (FRM), (2) the bulk diffusion model (BDM), and (3) the first-order reaction/diffusion model (FRDM) …”

Section: Materials and Methodsmentioning

confidence: 99%

“…Existing analytical solutions predominantly relied on assumptions about the type of leaching. 30 The literature documented three broad analytical models, namely: (1) the first-order reaction model (FRM), 31 (2) the bulk diffusion model (BDM), 29 and (3) the first-order reaction/diffusion model (FRDM). 32 FRM describes the mass transfer of elements from solidified/ cemented AAM specimens, wherein the dissolution of the specimen surface (referred to as surface wash-off) governs the process.…”

Section: Leaching Analysismentioning

confidence: 99%

Sustainable Alkali-Activated Mortars for the Immobilization of Heavy Metals from Copper Mine Tailings

Maqbool,

Mobili,

Blasi

et al. 2023

ACS Sustainable Resour. Manage.

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This study demonstrates a successful approach for immobilizing heavy metals in alkali-activated mortars (AAMs) by incorporating copper mine tailings (CMTs) and metakaolin (MK) as potential sources of aluminosilicates. Leachate concentrations of hazardous elements from AAM specimens were investigated up to 63 days of immersion in different solutions (pH = 4.5 and 7.0) using the static monolithic leaching method. Statistical analysis revealed that heavy metals such as Fe, Cu, Pb, and Cd were effectively immobilized in AAMs, contributing to the goal of mitigating environmental pollution. Moreover, the leaching of S was the highest in an acidic solution after 7 days (31 mg/L), while Si showed the highest concentration in an acidic solution after 28 days (18 mg/L). Sulfur exhibited a mean interval flux higher than those of Si and Al, indicating its faster release from AAMs. Although some elements were detected in relatively high concentration, such as Al in an acidic solution (16 mg/L), they fall within the non-enforceable guidelines set by the US Environmental Protection Agency (EPA), revealing that the manufactured AAMs can meet regulatory requirements. EDXS, FTIR, and XRD analyses provided valuable insights into the surface, chemical, and structural stabilities of AAMs, as well as the influence of pH, the presence of CMTs and MK, and the release of alkaline residues on leaching behavior.

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“…Heavy metals are some of the most challenging pollutants due to their toxic and nonbiodegradable nature and their bioaccumulation in ecological systems. − The determination of heavy metals hence is of vital importance in monitoring environmental quality, which is currently under pressure from increased pollution caused by industrial, agricultural, and domestic activities. − As heavy metals enter and accumulate in the environment, they can be absorbed by plants and animals that live in the contaminated areas leading to bioaccumulation. Through the food chain, these eventually biomagnify inside the human body through the consumption of bioaccumulated plants and animals or contaminated water.…”

Section: Heavy Metals In the Environmentmentioning

confidence: 99%

Heavy Metals Detection with Paper-Based Electrochemical Sensors

et al. 2021

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This Feature summarizes recent works in paper-based potentiometry and voltammetry in heavy metal determination. Interactions of paper substrates with heavy metals, influence on the sensing response, and modification methods applied to paper substrates to improve the performance of recently developed electrochemical sensors are discussed. Since the rekindling of interest in paper-based analytical devices, methodologies and electrode designs for heavy metal determinations are highlighted. Promising aspects of the use of these sensors for samples containing solids and the increased versatility of the use of paper in analytics offers the possibility of increased acceptance of these low-cost platforms.

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Assessment of the long-term leaching characteristics of cement-slag stabilized/solidified contaminated sediment

Cited by 39 publications

References 47 publications

Management of Solid Waste Containing Fluoride—A Review

Management of Solid Waste Containing Fluoride—A Review

Sustainable Alkali-Activated Mortars for the Immobilization of Heavy Metals from Copper Mine Tailings

Heavy Metals Detection with Paper-Based Electrochemical Sensors

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