Suitability of humic substances recovered from sewage sludge to remedy soils from a former As mining area – a novel approach

Gusiatin, Zygmunt M.; Kulikowska, Dorota; Klik, Barbara

doi:10.1016/j.jhazmat.2017.05.019

Cited by 37 publications

(10 citation statements)

References 34 publications

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“…The chemical speciation of metals in soil could exert a great impact on their fate concerning the leaching and subsequent environmental risks (Gusiatin et al, 2017;Rahman et al, 2017). Previous works have demonstrated Fe-Mn oxides, organic matter-bound, and residual fractions are commonly at steady state and induce relatively minor adverse effects in the environment (Yang et al, 2017;Zhang et al, 2017).…”

Section: Effect Of Biodegradable Chelator Washing On Speciation Of Rementioning

confidence: 99%

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Wang

Zhang

Zhong

et al. 2018

Science of The Total Environment

103

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Soil washing with chelators is a promising and efficient method of remediating metals-contaminated soils. However, the toxicity of residual metals and the effects on soil microbial properties have remained largely unknown after washing. In this study, we employed four biodegradable chelators for removal of metals from contaminated soils: iminodisuccinic acid (ISA), glutamate-N,N-diacetic acid (GLDA), glucomonocarbonic acid (GCA), and polyaspartic acid (PASP). The maximum removal efficiencies for Cd, Pb, and Zn of 85, 55, and 64% and 45, 53, and 32% were achieved from farmland soil and mine soil using biodegradable chelators, respectively. It was found that the capacity of ISA and GLDA to reduce the labile fraction of Cd, Pb, and Zn was similar to that of the conventional non-biodegradable chelator ethylenediaminetetraacetic acid (EDTA). The leachability, mobility, and bioaccessibility of residual metals after washing decreased notably in comparison to the original soils, thus mitigating the estimated environmental and human health risks. Soil β-glucosidase activity, urease activity, acid phosphatase activity, microbial biomass nitrogen, and microbial biomass phosphorus decreased in the treated soils. However, compared with EDTA treatment, soil enzyme activities distinctly increased by 5-94% and overall microbial biomass slightly improved in the remediated soils, which would facilitate reuse of the washed soils. Based on soil toxicity tests that employed wheat seed germination as the endpoint of assessment, the washed soils exhibited only slight effects especially after ISA and GLDA treatments, following high-efficiency metal removal. Hence, ISA and GLDA appear to possess the greatest potential to rehabilitate polluted soils with limited toxicity remaining.

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Section: Effect Of Biodegradable Chelator Washing On Speciation Of Rementioning

confidence: 99%

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Wang

Zhang

Zhong

et al. 2018

Science of The Total Environment

103

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“…On this line, few studies have investigated chitosan and humic acids (that are natural constituents of the soil) to extract heavy metals from highly heavy metal polluted soil (Kulikowska et al, 2015a;Boechat et al, 2016;Jiang et al, 2011;Meng et al, 2017;Gusiatin et al, 2017). Nowadays cheaper sources of humic substances are under research.…”

Section: New Aproaches Regarding Remediation Methods Of Heavy Metals mentioning

confidence: 99%

Study on Pedological Soil Properties in the “Haneș” Mine Area for its Remediation

Băbău¹,

Micle²,

Sur³

2018

Studia UBB Ambientum

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“…Soil washing with chelators, a potential technology developed in recent years for rapid remediation of soil contaminated with potentially toxic elements (PTEs), is characterized by its simplicity of operation and remarkable efficiency (Ferraro et al, 2016;Gusiatin et al, 2017;Dolev et al, 2019;Piccolo et al, 2019). This technique employs physical processes to separate the polluted soil particles followed by chemical extraction with chelators to form coordinate bonds with PTEs and thus facilitates their solubilization from solid to solution (Borggaard et al, 2019;Kulikowska et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Remediation of heavy metal contaminated soil by biodegradable chelator–induced washing: Efficiencies and mechanisms

Wang

Pan

Zhang

et al. 2020

Environmental Research

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Biodegradable chelators (BCs) are promising substitutes for conventional washing agents in the remediation of heavy metal contaminated soil with strong complexing ability and less cost. However, great challenges for the applications of BC-assisted washing still exist, such as the assessment of the factor affecting the efficiency of metal removal and the unclear of the metal removal mechanism. Batch washing was therefore explored to evaluate the potential for four BCs for removing Cd, Pb, and Zn from polluted soils. The soil spectroscopic characteristics before and after washing were also investigated. The results demonstrated that iminodisuccinic acid (ISA) and glutamate-N, N-diacetic acid (GLDA) were an appealing alternative to commonly used non-biodegradable ethylenediaminetetraacetic acid, but glucomonocarbonic acid (GCA) and polyaspartic acid (PASP) were less efficient. Optimal parameters of BCs were determined to be a concentration of 50 mmol L −1 , a pH of 5.0, a contact time of 120 min, and a solid/liquid ratio of 1:5, considering metal removal efficiencies and the suitable cost. A single removal washing could be up to 52.39% of Cd, 71.79% of Pb, and 34.13% of Zn from mine soil, and 98.28% of Cd, 91.10% of Pb, and 90.91% of Zn from polluted farmland soil. After washing, the intensity of heavy metal binding to soil colloids increased while the metal mobility reduced because of weakly bound fractions removed by BCs. The BCs-induced soil washing revealed that the possible mechanisms of metal removal included the acid dissolution, ion exchange, and surface complexation. Our findings highlight the potential application of especially ISA and GLDA as efficient washing agents to remove potentially toxic elements from contaminated soils.

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Suitability of humic substances recovered from sewage sludge to remedy soils from a former As mining area – a novel approach

Cited by 37 publications

References 34 publications

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Study on Pedological Soil Properties in the “Haneș” Mine Area for its Remediation

Remediation of heavy metal contaminated soil by biodegradable chelator–induced washing: Efficiencies and mechanisms

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