The addition of biochar as a sustainable strategy for the remediation of PAH–contaminated sediments

Bianco, Francesco; Race, Marco; Papirio, Stefano; Oleszczuk, Patryk; Esposito, Giovanni

doi:10.1016/j.chemosphere.2020.128274

Cited by 65 publications

(14 citation statements)

References 207 publications

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“…Biochar results from bio-residues that are thermochemically degraded in an absent or limited oxygen environment, generating a porous material with a high carbon density. Biochar application has a positive impact on soil pores, aggregate structure, water and nutrient retention capacity (Beesley et al, 2011;Bianco et al, 2021). The presence of plant nutrients and higher content of recalcitrant organic carbon in the biochar and its suitability for microbial habitat due to its porous structure are considered as the main reasons for the improvement in soil properties and increase in plan nutrient uptake in biochar amended soils (Bianco et al, 2021;Nigussie et al, 2012;Rahman et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Biochar application has a positive impact on soil pores, aggregate structure, water and nutrient retention capacity (Beesley et al, 2011;Bianco et al, 2021). The presence of plant nutrients and higher content of recalcitrant organic carbon in the biochar and its suitability for microbial habitat due to its porous structure are considered as the main reasons for the improvement in soil properties and increase in plan nutrient uptake in biochar amended soils (Bianco et al, 2021;Nigussie et al, 2012;Rahman et al, 2021). Cybulak et al (2016) reported that the application of biochar increases the hygroscopic moisture content of soil (by 1.5-3.0%), which would be very beneficial to dry and degraded soils.…”

Section: Introductionmentioning

confidence: 99%

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Cattle manure compost and biochar supplementation improve growth of Onobrychis viciifolia in coal-mined spoils under water stress conditions

Roy

Núñez‐Delgado

Kader

et al. 2022

Environmental Research

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Surface mining is a critical anthropogenic activity that significantly alters the ecosystem, while the use of appropriate revegetation techniques can be considered an important and feasible strategy in the way to improve the ecosystem services of degraded land. In the present study, we carried out a pot experiment to investigate the effects of three different variables on morpho-physiological and biochemical parameters of Onobrychis viciifolia to assess the capability of this species to be used for restoration purposes. Specifically, the variables studied were: (a) water (W) regime, working at five values as regards field capacity (FC) (i.e., 80% FC = highest, 72% FC = high, 60% FC = moderate, 48% FC = low, and 40% FC = very-low dose); and (b) rates of cattle manure compost (CMC) and wood biochar (BC) (weight/weight ratio), working at five rates (i.e., 4.0% = highest, 3.2% = high, 2.0% = moderate, 0.8% = low, and 0% = either no-CMC or no-BC dose). In addition, soil physical-chemical properties and enzyme activities were also investigated at the end of the experimental period. It was found that morphological growth attributes such as plant height, maximum root length, and dry biomass significantly increased with W, CMC and BC applications. Compared to control, moderate-to-high W, CMC and BC doses (W 80 CMC 2 BC 2 ) increased net photosynthesis rate (by 42%), stomatal conductance (by 50%), transpiration rate (by 29%), water use efficiency (by 10%), chlorophyll contents (by 73%), carotenoid content (by 81%), leaf relative water content (by 33%) and leaf membrane stability index (by 30%). Under low-W content, the application of CMC and BC enhanced osmotic adjustments by increasing the content of soluble sugar and the activities of superoxide dismutase, catalase, peroxidase and ascorbate peroxidase, decreasing the oxidative stress, as verified by low levels of hydrogen peroxide, superoxide anion, malondialdehyde and proline contents in leaf tissues. Moreover, application of W, CMC and BC significantly improved soil water holding capacity, available nitrogen, phosphorus and potassium, urease and catalase activities, which facilitate plant growth. These results would aid in designing an appropriate strategy for achieving a successful revegetation of O. viciifolia, providing optimum doses of W (64% field capacity), CMC (2.4%) and BC (1.7%), with the final aim of reaching ecological restoration in arid degraded lands.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cattle manure compost and biochar supplementation improve growth of Onobrychis viciifolia in coal-mined spoils under water stress conditions

Roy

Núñez‐Delgado

Kader

et al. 2022

Environmental Research

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“…Measurements of Riparian Vegetation Indices 2.3.1. Arundo donax Stands' LAI* Measurements LAI analysis is representative of riparian vegetation growth and health, widely employed in the analysis of climate change effects on flooding hazards, as reported in many works on the protection and improvement of ecological services in both natural and manmade environments [21][22][23][24][25]. In the present study, a total of 300 LAI* measurements were performed at 30 cross-sections, spaced 3.85 m along the vegetated drainage channel under diffusive sky conditions to reduce the effect of sunlight fluctuations.…”

Section: Methodsmentioning

confidence: 99%

Bulk Drag Predictions of Riparian Arundo donax Stands through UAV-Acquired Multispectral Images

Lama

Crimaldi

Pasquino

et al. 2021

Water

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Estimating the main hydrodynamic features of real vegetated water bodies is crucial to assure a balance between their hydraulic conveyance and environmental quality. Riparian vegetation stands have a high impact on vegetated channels. The present work has the aim to integrate riparian vegetation’s reflectance indices and hydrodynamics of real vegetated water flows to assess the impact of riparian vegetation morphometry on bulk drag coefficients distribution along an abandoned vegetated drainage channel fully covered by 9–10 m high Arundo donax (commonly known as giant reed) stands, starting from flow average velocities measurements at 30 cross-sections identified along the channel. A map of riparian vegetation cover was obtained through digital processing of Unnamed Aerial Vehicle (UAV)-acquired multispectral images, which represent a fast way to observe riparian plants’ traits in hardly accessible areas such as vegetated water bodies in natural conditions. In this study, the portion of riparian plants effectively interacting with flow was expressed in terms of ground-based Leaf Area Index measurements (LAI), which easily related to UAV-based Normalized Difference Vegetation Index (NDVI). The comparative analysis between Arundo donax stands NDVI and LAI map enabled the analysis of the impact of UAV-acquired multispectral imagery on bulk drag predictions along the vegetated drainage channel.

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“…on heavy metal removal efficiency using various washing agents. Among these, while most investigations have focused on the efficiency of the heavy metal removal mechanisms, only a few have investigated the influence of soil characteristics on soil washing [ 21 , 22 , 23 ]. Since there is interest in minimizing negative effects of the washing treatment process on soil qualities [ 18 ], additional research is required for the development of an effective soil washing process.…”

Section: Introductionmentioning

confidence: 99%

Remediation of Toxic Heavy Metal Contaminated Soil by Combining a Washing Ejector Based on Hydrodynamic Cavitation and Soil Washing Process

Kim

Cho

Purev

et al. 2022

IJERPH

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Based on the features of hydrodynamic cavitation, in this study, we developed a washing ejector that utilizes a high-pressure water jet. The cavitating flow was utilized to remove fine particles from contaminated soil. The volume of the contaminants and total metal concentration could be correlated to the fine-particle distribution in the contaminated soil. These particles can combine with a variety of pollutants. In this study, physical separation and soil washing as a two-step soil remediation strategy were performed to remediate contaminated soils from the smelter. A washing ejector was employed for physical separation, whereas phosphoric acid was used as the washing agent. The particles containing toxic heavy metals were composed of metal phase encapsulated in phyllosilicates, and metal phase weakly bound to phyllosilicate surfaces. The washing ejector involves the removal of fine particles bound to coarse particles and the dispersion of soil aggregates. From these results we determined that physical separation using a washing ejector was effective for the treatment of contaminated soil. Phosphoric acid (H3PO4) was effective in extracting arsenic from contaminated soil in which arsenic was associated with amorphous iron oxides. Thus, the obtained results can provide useful information and technical support for field soil washing for the remediation of soil contaminated by toxic heavy metals through emissions from the mining and ore processing industries.

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The addition of biochar as a sustainable strategy for the remediation of PAH–contaminated sediments

Cited by 65 publications

References 207 publications

Cattle manure compost and biochar supplementation improve growth of Onobrychis viciifolia in coal-mined spoils under water stress conditions

Cattle manure compost and biochar supplementation improve growth of Onobrychis viciifolia in coal-mined spoils under water stress conditions

Bulk Drag Predictions of Riparian Arundo donax Stands through UAV-Acquired Multispectral Images

Remediation of Toxic Heavy Metal Contaminated Soil by Combining a Washing Ejector Based on Hydrodynamic Cavitation and Soil Washing Process

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