Possibility of using modified fly ash and organic fertilizers for remediation of heavy-metal-contaminated soils

Environment materials (humic acid (HA), super absorbent polymers (SAP), fly ash (FM) and zeolite (FS)) were used as amendments to immobilize heavy metal Pb and Cd in artificial contaminated soils. The results showed that soil pH and EC changed after the application of single or combined and co-application amendments. The leaching Pb in the single-Pb contaminated soils amended with HA, FM, C1 (HA, SAP, FM, FS) and C2 (HA, SAP, FM) were 93%, 87%, 59% and 77% of the control without amendments, respectively. The leaching Cd in the single-Cd contaminated soils amended with SAP and C3 (HA, SAP, FS) were 64%, and 83% of the control, respectively, in four-steps leaching. The leaching Pb in the Pb-Cd co-contaminated soil amended with HA, C2 and C3 were 41%, 95% and 77% of the control, respectively. The leaching Cd in the Pb-Cd co-contaminated soil amended with HA, SAP and C3 were 85%, 72% and 55% of the control, respectively. The results indicated that C1 and SAP was the best amendments for single Pb and Cd contaminated soil, respectively. While the combined amendment, HA and C3 could prevent Pb and Cd to be leached from co-contaminated soils, respectively.

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Using Modified Fly Ash for Removal of Heavy Metal Ions from Aqueous Solution

Journal of Chemistry ◽

10.1155/2020/8428473 ◽

2020 ◽

Vol 2020 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Thuy Chinh Nguyen ◽

Trang Do Mai Tran ◽

Van Bay Dao ◽

Quoc-Trung Vu ◽

Trinh Duy Nguyen ◽

...

Keyword(s):

Heavy Metal ◽

Fly Ash ◽

Adsorption Isotherm ◽

Metal Ion ◽

Adsorption Process ◽

Sodium Dodecyl ◽

Isotherm Model ◽

Isotherm Models ◽

Adsorption Isotherm Models ◽

Modified Fly Ash

This paper presents the characteristics of fly ash which was modified by 2-mercaptobenzothiazole (MBT) and sodium dodecyl sulfate (SDS) as the surfactants after treating with 1M NaOH solution. The change in morphology, specific surface area, crystal structure, and composition of the unmodified and modified fly ash was evaluated by FTIR, XRD, FESEM, BET, and EDX methods and techniques. The FTIR spectra of modified fly ash showed that there was no chemical reaction between the surfactants and fly ash. The XRD patterns and FESEM images indicated that modified fly ash had zeolite structure with a pore size of about 50 nm. Heavy metal ion adsorption behavior as well as adsorption isotherm models (Langmuir and Freundlich) of Cd2+ and Hg2+ ions of the unmodified and modified fly ash were also investigated and discussed. The amount of adsorbed ions of the modified fly ash was higher than that of the unmodified fly ash. The calculated results from the adsorption data according to the adsorption isotherm models of the above ions displayed that the Langmuir isotherm model was complied for the Cd2+ adsorption process while the Freundlich isotherm model was fitted for the Hg2+ adsorption process.

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Utilization of fly ash for stabilization/solidification of heavy metal contaminated soils

Engineering Geology ◽

10.1016/s0013-7952(03)00105-4 ◽

2003 ◽

Vol 70 (3-4) ◽

pp. 377-394 ◽

Cited By ~ 320

Author(s):

Dimitris Dermatas ◽

Xiaoguang Meng

Keyword(s):

Heavy Metal ◽

Fly Ash ◽

Contaminated Soils

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Heavy metal bioaccumulation by selected plants from fly ash–contaminated soils in suburban area

Arabian Journal of Geosciences ◽

10.1007/s12517-020-06445-w ◽

2021 ◽

Vol 14 (2) ◽

Author(s):

Sami Ullah Qadir ◽

Vaseem Raja ◽

Weqar Ahmad Siddiqi ◽

Mohammed Nasser Alyemeni ◽

Leonard Wijaya ◽

...

Keyword(s):

Heavy Metal ◽

Fly Ash ◽

Contaminated Soils ◽

Suburban Area ◽

Metal Bioaccumulation ◽

Heavy Metal Bioaccumulation

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Chemical Properties of Heavy Metal-Contaminated Soils from a Korean Military Shooting Range: Evaluation of Pb Sources Using Pb Isotope Ratios

Applied Sciences ◽

10.3390/app11157099 ◽

2021 ◽

Vol 11 (15) ◽

pp. 7099

Author(s):

Inkyeong Moon ◽

Honghyun Kim ◽

Sangjo Jeong ◽

Hyungjin Choi ◽

Jungtae Park ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Contaminated Soils ◽

Management Strategies ◽

Chemical Properties ◽

Heavy Metal Concentration ◽

Soil Samples ◽

Shooting Range ◽

Geochemical Properties ◽

Mineral Phases

In this study, the geochemical properties of heavy metal-contaminated soils from a Korean military shooting range were analyzed. The chemical behavior of heavy metals was determined by analyzing the soil pH, heavy metal concentration, mineral composition, and Pb isotopes. In total, 24 soil samples were collected from a Korean military shooting range. The soil samples consist of quartz, albite, microcline, muscovite/illite, kaolinite, chlorite, and calcite. Lead minerals, such as hydrocerussite and anglesite, which are indicative of a transformation into secondary mineral phases, were not observed. All soils were strongly contaminated with Pb with minor concentrations of Cu, Ni, Cd, and Zn. Arsenic was rarely detected. The obtained results are indicated that the soils from the shooting range are contaminated with heavy metals and have evidences of different degree of anthropogenic Pb sources. This study is crucial for the evaluation of heavy metal-contaminated soils in shooting ranges and their environmental effect as well as for the establishment of management strategies for the mitigation of environmental risks.

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