Remediation of soils and sediments polluted with polycyclic aromatic hydrocarbons: To immobilize, mobilize, or degrade?

Kumar, Manish; Bolan, Nanthi; Hoang, Son A.; Sawarkar, Ankush D.; Jasemizad, Tahereh; Gao, Bowen; Keerthanan, S.; Padhye, Lokesh P.; Singh, Lal; Kumar, Sunil; Vithanage, Meththika; Yang, Li; Zhang, Ming; Kirkham, M.B.; Vinu, Ajayan; Rinklebe, Jörg

doi:10.1016/j.jhazmat.2021.126534

Cited by 180 publications

(39 citation statements)

References 275 publications

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“…The morphological characteristics of heavy metals in soil are important indicators to reveal the migration and transformation of heavy metals and bioavailability (Liu et al, 2020). Related studies have also shown that heavy metals in soil combine with different carriers into various forms, and different forms of heavy metals reflect different bioavailability (Huang et al, 2014;Liu et al, 2014;Kumar et al, 2021), which is further reflected in the change of soil available Cd content. According to the five-stage grouping method proposed by Tessier et al (1979), heavy metals can be divided into exchangeable, carbonate-bound, Fe-Mn oxidized, organic-bound and residual states.…”

Section: The Change Of CD Speciation In Soilmentioning

confidence: 99%

Effects of Several Organic Fertilizers on Heavy Metal Passivation in Cd-Contaminated Gray-Purple Soil

Wang

Liu

et al. 2022

Front. Environ. Sci.

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Soil heavy metal pollution has become a major ecological and environmental problem and a serious threat to global food security. Organic fertilizer can not only improve soil quality and provide nutrients for plants but also reduce the harm of heavy metal ions to a certain extent, meaning it has become a current research hotspot in the field of heavy metal passivation. In this paper, a completely combined experimental design was used to compare the effects of five organic fertilizers [nutshell organic fertilizer (NOF), pig manure organic fertilizer (PMOF), sludge organic fertilizer (SOF), humus soil organic fertilizer (HSOF) and earthworm soil organic fertilizer (ESOF)] on available Cd in soil with different pollution levels at different dosages, and the passivation mechanism of soil Cd was preliminarily discussed. The results showed that all kinds of organic fertilizers were passivated by reducing the Cd availability, and their effects on the Cd availability of purple soil were closely related to the degree of soil pollution and the amount of organic fertilizers. The passivation effect of moderate Cd-contaminated soil was the best, which increased with the increase of organic fertilizer application rate, and the effects of NOF and SOF were the best. However, the passivation effect of organic fertilizers on soil Cd was the worst in mild Cd-contaminated soil, especially ESOF. The results of Cd morphological correlation analysis showed that Exe-Cd and FeMnOx-Cd in the soil had significantly positive contributions to available Cd, while Res-Cd showed significantly negative contributions. And in moderate Cd contaminated soil, Exe-Cd content decreased by 7.12%–28.50%, while Res-Cd content increased by 19.74%–65.81%. In addition, the content of available Cd in soil decreased first and then increased with time after adding organic fertilizer, and reached the lowest value at 15 days and stabilized after 60 days. The conclusion of this paper can provide a theoretical basis for the rational use of organic fertilizer to reduce the bioavailability of cadmium in Gray-Purple soil.

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Section: The Change Of CD Speciation In Soilmentioning

confidence: 99%

Effects of Several Organic Fertilizers on Heavy Metal Passivation in Cd-Contaminated Gray-Purple Soil

Wang

Liu

et al. 2022

Front. Environ. Sci.

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“…Biochar is a relatively stable carbonaceous substance synthesize using different feedstocks such as lignocellulosic waste [ 75 , 76 ], municipal waste [ 77 , 78 ], plastic waste [ 16 ] at elevated temperatures (> 400°C) in absence of oxygen supply. Owing to its excellent cation exchange capacity, porosity, high surface area, and surface functional groups, it has been extensively applied in removal of organic and inorganic contaminants [ 79 , 80 ] additives in anaerobic digestion and composting [ 11 , 81 ], and soil amendment [ 78 ]. Due to excessive availability of bamboo biomass, it can be considered as an excellent feedstock for production of biochar via thermochemical conversion routes [ 59 ].…”

Section: Value-added Products From Bamboomentioning

confidence: 99%

Multifunctional applications of bamboo crop beyond environmental management: an Indian prospective

et al. 2022

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Increasing population, industrialization, and economic growth cause several adverse impacts on the existing environment and living being. Therefore, rising pollutants load and their mitigation strategies, as well as achieving energy requirements while reducing reliance on fossil fuels are the key areas, which needs significant consideration for sustainable environment. Since India has considerable biomass resources, bioenergy is a significant part of the country’s energy policy. However, the selection of feedstock is a crucial step in bioenergy production that could produce raw material without compromising food reserve along with the sustainable environment. Higher growth capacity of bamboo species makes them a suitable lignocellulosic substrate for the production of high-value greener products such as fuels, chemicals, and biomaterials as well as an appropriate candidate for eco-restoration of degraded land. In that context, the current review discusses the multidimensional applications of bamboo species in India. The bioenergy potency of bamboo and probability of aligning its production, cultivation, and operation with economic and social development agendas are also addressed, making it an exceptional crop in India. Additionally, its fast growth, perennial root systems, and capability to restore degraded land make it an essential part of ecological restoration. Furthermore, this review explores additional benefits of bamboo plantation on the environment, economy, and society along with future research prospects.

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“…PAHs are released into the atmosphere and enter the water, soil, or sediment through wet and dry deposition processes. To check the leaching of the PAH compounds from contaminated soils and sediments various remediation approaches have been adopted such as capping, stabilization and solidification, and dredging and excavation [29]. Capping immobilizes and reduces the discharge of pollutants into the natural environment and is well-thought to be an economical physical remediation method [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…To check the leaching of the PAH compounds from contaminated soils and sediments various remediation approaches have been adopted such as capping, stabilization and solidification, and dredging and excavation [29]. Capping immobilizes and reduces the discharge of pollutants into the natural environment and is well-thought to be an economical physical remediation method [27][28][29][30]. The in-situ capping technique with adsorbents is a frequently used engineering measure to treat sediment and soil contamination.…”

Section: Introductionmentioning

confidence: 99%

“…The in-situ capping technique with adsorbents is a frequently used engineering measure to treat sediment and soil contamination. In this sense, a variety of adsorbents including active carbon, zeolites, biochar, or clays have shown good effects in laboratory experiments [27][28][29][30]. For example, Samuelsson et al [30] exposed two organisms to nine PAHs in the uncapped sediment to determine their bioaccumulation.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Polycyclic Aromatic Hydrocarbons by Natural, Synthetic and Modified Clays

et al. 2021

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Polycyclic aromatic hydrocarbons (PAHs) are of major scientific concern owing to their widespread presence in environmental compartments and their potential toxicological effects on humans and biota. In this study, the adsorption capacity of natural (montmorillonite (Mt)), synthetic (Na-Mica-4), and modified (with octadecylamine and octadecyltrimethylamine (ODA-Mt, ODA-Mica-4, and ODTMA-Mt and ODTMA-Mica-4)) clays were assessed and compared for the removal of 16 PAHs. Materials were synthesized and characterized by X-Ray diffraction, Zeta potential, and Fourier-transform infrared spectroscopy. The results showed its correct preparation and the incorporation of PAHs in the structure of the clays after the adsorption tests. The proposed materials were effective PAH adsorbents, with adsorption percentages close to 100%, in particular those using Mt. Mt and Na-Mica-4 presented a better adsorption capacity than their organofunctionalized derivatives, indicating that the adsorption of PAHs may occur both in the surface part and in the interlayer. The proposed adsorbents take the advantage of being a low cost and highly effective. They can be an interesting alternative for wastewater treatment and soil remediation to prevent PAH contamination.

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Remediation of soils and sediments polluted with polycyclic aromatic hydrocarbons: To immobilize, mobilize, or degrade?

Cited by 180 publications

References 275 publications

Effects of Several Organic Fertilizers on Heavy Metal Passivation in Cd-Contaminated Gray-Purple Soil

Effects of Several Organic Fertilizers on Heavy Metal Passivation in Cd-Contaminated Gray-Purple Soil

Multifunctional applications of bamboo crop beyond environmental management: an Indian prospective

Adsorption of Polycyclic Aromatic Hydrocarbons by Natural, Synthetic and Modified Clays

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