Technosols as a novel valorization strategy for an ecological management of dredged marine sediments

Macía, P.; Fernández‐Costas, Carmen; Rodríguez, Elena Gallego; Sieiro, Pilar; Pazos, Marta

doi:10.1016/j.ecoleng.2014.03.020

Cited by 49 publications

(28 citation statements)

References 28 publications

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“…In fact, TS100 showed high bulk density, low macro‐porosity, low drainage capacity and superficial crust. Such characteristics, observed also by Macía et al ., made the sediment used in this research unsuitable as a growing medium. However, when the sediment was mixed with peat, lettuce yield did not differ from control plants (Table ).…”

Section: Discussionmentioning

confidence: 99%

Remediated marine sediment as growing medium for lettuce production: assessment of agronomic performance and food safety in a pilot experiment

et al. 2019

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BACKGROUND The use of reclaimed dredged sediments as growing media may offer a profitable alternative to their disposal as a waste and at the same time meets the need of peat‐substitute substrates in horticulture. When sediments are reused to cultivate food crops, issues related to human health rise due to potential accumulation of contaminants in the product. This pilot study aimed at verifying the suitability of a reclaimed dredged port sediment, used pure or mixed with peat, as a growing medium for lettuce cultivation. RESULTS The pure sediment caused a reduction in crop yield, probably due to its unsuitable physical properties, whereas the mixture sediment–peat and pure peat resulted in the same yield. Although the sediment contained potentially phytotoxic heavy metals and some organic pollutants, no symptoms of plant toxicity were noted. Besides, no organic contaminants were detected in lettuce heads, and heavy metals amounts were not hazardous for consumers. Conversely, plants grown in the sediment were particularly rich in minerals like Ca, Mg and Fe, and showed higher concentrations of organic acids and antioxidants. CONCLUSION The use of the sediment as a growing medium for lettuce was shown to be safe for both inorganic and organic contaminants. Nevertheless, considering crop yield results, the mixture of the sediment with other materials is recommended in order to produce a substrate with more suitable physicochemical properties for vegetable cultivation. © 2019 Society of Chemical Industry

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Section: Discussionmentioning

confidence: 99%

Remediated marine sediment as growing medium for lettuce production: assessment of agronomic performance and food safety in a pilot experiment

et al. 2019

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“…Physico-chemical properties of soil and sediment medium Analyses of sediment properties are important for determining their potential as a soil amendment (Urbaniak et al 2016;Tarnawski et al 2017). For economic and ecological reasons, uncontaminated or less-contaminated dredged sediments are recommended for use in agriculture, especially for the cultivation of non-edible crops (Macía et al 2014). Such agricultural utilization takes advantage of the beneficial properties of sediments, which are rich in clay, silt, organic matter, nutrients, and microbial activity (Karanam et al 2008;Baran et al 2010Baran et al , 2012Mattei et al 2017).…”

Section: Resultsmentioning

confidence: 99%

Effects of soil amendment with PCB-contaminated sediment on the growth of two cucurbit species

Urbaniak

Lee

Takazawa

et al. 2019

Environ Sci Pollut Res

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The aim of the study was to evaluate the influence of the application of increasing proportions (0%, 10%, 25%, 50%, 75%, and 100%) of an admixture of PCB-contaminated Hudson River sediment collected from the Upper Hudson River, near Waterford, Saratoga county (New York, USA) on soil properties, phytotoxicity, and biometric and physiological responses of cucumber (Cucumis sativus L. cv 'Wisconsin SMR 58') and zucchini (Cucurbita pepo L. cv 'Black Beauty') grown as potential phyto-and rhizoremediators. The experiment was performed for 4 weeks in a growth chamber under controlled conditions. Amendment of Hudson River sediment to soil led to a gradual increase in PCB content of the substratum from 13.7 μg/kg (with 10% sediment) to 255 μg/kg (with 100% sediment). Sediment amendment showed no phytotoxic effects during the initial stages, even Lepidium sativum root growth was stimulated; however, this positive response diminished following a 4-week growth period, with the greatest inhibition observed in unplanted soil and zucchini-planted soil. The stimulatory effect remained high for cucumber treatments. The sediment admixture also increased cucurbit fresh biomass as compared to control samples, especially at lower doses of sediment admixture, even though PCB content of the soil amended with sediment increased. Cucurbits' leaf surface area, in turn, demonstrated an increase for zucchini, however only for 50% and 75% sediment admixture, while cucumber showed no changes when lower doses were applied and decrease for 75% and 100% sediment admixture. Chlorophyll a + b decreased significantly in sediment-amended soils, with greater inhibition observed for cucumber than zucchini. Our results suggest that admixture of riverine sediment from relatively less-contaminated locations may be used as soil amendments under controlled conditions; however, further detailed investigation on the fate of pollutants is required, especially in terms of the bioaccumulation and biomagnification properties of PCBs, before contaminated sediment can be applied in an open environment.

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“…The increased prevalence of Technosols and their impact on the environment are making evident the necessity of promoting the study of the behaviour and evolution of these soils (Jangorzo et al ., ; Paradelo & Barral, ; Huot et al ., ; Lilić et al ., ). Recently, a number of studies have focused on Technosols, some of them dealing with restoration of degraded areas (Paz‐Ferreiro et al ., ; Tsolova et al ., ; Zornoza et al ., ; Zornoza et al ., ), waste reuse (Macía et al ., ; Rokia et al ., ), stabilisation of pollutants (Martínez‐Sanchez et al ., ; Vittori Antisari et al ., ; Wanat et al ., ) or the search for new uses (Ondoño et al ., ), and a corresponding increase in publications on the subject has been observed.…”

Section: Introductionmentioning

confidence: 98%

Evolution of Chemical Characteristics of Technosols in an Afforested Coal Mine Dump over a 20‐year Period

et al. 2016

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Coal mining in areas containing pyritic materials frequently leads to a remarkable impact on the environment because of sulphide oxidation. We studied the evolution of chemical characteristics of Technosols derived from sterile materials, in a lignite mine located in As Pontes (northwest Spain), over a 20-year period. Three plots, which had different management practices, were selected. The mine spoil was deposited randomly in two of the plots (CSP with low S concentration and CSA with high S concentration), while it was selectively managed in the other one (P206). Twenty years after the first sampling, CSA continued to show the highest acidity (pH water 3•7-3•9), whereas the lowest acidity was that of P206 (pH water 5•0). Regarding the surface layer, C increased 1•1% in P206, 0•3% in CSP and 0•2% in CSA. Nitrogen increased 1% in P206. The C/N ratio increased in all plots. Phosphorus, Ca, Mg, K and effective cation exchange capacity decreased in 2002 and experienced a slight increase in 2012. Exchangeable Al and Al saturation increased in CSP and P206 and decreased in CSA. Electric conductivity levels of Ca, Mg, Na, Al and SO 4 2À concentrations decreased in the soil solution in all plots during the 20-year period. Twenty years after the first monitoring, the plots that were built based on selective management of the mine spoil showed lower acidity and acidity-derived consequences. These facts confirm the necessity of an appropriate selection of sterile materials, avoiding the placement of pyrite-rich spoils on the surface or near-surface zones, which is essential to facilitate proper restoration of this kind of dumping areas.

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Technosols as a novel valorization strategy for an ecological management of dredged marine sediments

Cited by 49 publications

References 28 publications

Remediated marine sediment as growing medium for lettuce production: assessment of agronomic performance and food safety in a pilot experiment

Remediated marine sediment as growing medium for lettuce production: assessment of agronomic performance and food safety in a pilot experiment

Effects of soil amendment with PCB-contaminated sediment on the growth of two cucurbit species

Evolution of Chemical Characteristics of Technosols in an Afforested Coal Mine Dump over a 20‐year Period

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