Long-term amendment of urban and animal wastes equivalent to more than 100 years of application had minimal effect on plant uptake of potentially toxic elements

López-Rayo, Sandra; Laursen, Kristian Holst; Lekfeldt, Jonas Duus Stevens; Grazie, Fabio Delle; Magid, Jakob

doi:10.1016/j.agee.2016.06.019

Cited by 50 publications

(55 citation statements)

References 38 publications

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“…The work of Singh and Agrawal () revealed that the application of SS to Beta vulgaris at lower (20%) SSA rate boosts up the biomass, but as the rate of amendment increased up to 40% (SSA), the biomass content dwindled. When fertilization of oat and peas was performed with the cattle manure and composted household wastes, the yield exalted significantly in the experiment of López‐Rayo et al (). In this study, plant height and shoot weight of wheat plant depreciated as the SS and PrM biowastes amendment level advances.…”

Section: Resultssupporting

confidence: 65%

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Investigating the uptake and acquisition of potentially toxic elements in plants and health risks associated with the addition of fresh biowaste amendments to industrially contaminated soil

et al. 2017

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Soil contamination by potentially toxic elements (PTEs), due to rapid industrialization and urbanization, is a serious environmental concern that has been threatening both the sustainability of various agroecosystems and human health. Efforts to investigate the bioavailability, transfer, and accumulation of PTEs in the soil–plant system and their possible health consequences have almost exclusively focused in the past studies. However, there is limited evidence for increased human exposure to PTEs through dietary intake of food crop grown on contaminated soil influenced by fresh biowaste amendments (FBAs). Here, we show that FBAs addition to soil markedly (p ≤ .01) intensified human exposure to PTEs through impacts on solubility, uptake, and bioaccumulation compared with the control. In general, the risk assessment performed indicated that the hazard index values for FBAs treatments were notably higher than that of control; however, these were shown to be less than the legal limit (<1). In addition, the lifetime risks of developing carcinogenicity from exposure to PTEs were far above the maximum regulatory limits (1.00E‐06), indicating that remarkable (p ≤ .01) amount of PTEs was transferred to food with the addition of FBAs. Conclusively, these results suggest that the use of FBAs to contaminated soil aggravates health risks of PTEs through wheat consumption. Further studies, which incorporate the in vitro gastrointestinal bioaccessibility, should be conducted to heighten our understanding about PTEs exposure and the risks associated with FBAs addition to contaminated soil.

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Section: Resultssupporting

confidence: 65%

“…A number of studies have been published showing the boost up in yields of different crops, after a varied type of biowastes application to agricultural land. This is because of the presence of macronutrients and micronutrients present in the biowaste materials (López‐Rayo, Laursen, Lekfeldt, Delle Grazie, & Magid, ; Yousaf et al, ).…”

Section: Resultsmentioning

confidence: 99%

Investigating the uptake and acquisition of potentially toxic elements in plants and health risks associated with the addition of fresh biowaste amendments to industrially contaminated soil

et al. 2017

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“…The soil medium for the experiments was a mixture of a sandy loam soil and quartz sand (grain size 0.4–0.9 mm) at a mass‐based ratio of 51% soil to 49% sand. The soil used in the mixture was sampled in 2015 from the CRUCIAL long‐term field experiment in Taastrup, Denmark ( López‐Rayo et al, ), from a plot that had received mineral NPK fertilizer since 2003 corresponding to an average of 16 kg P y −1 . It contained 66% sand, 16% silt, 16% clay, and 2% humus, and had a total P content of 494 (± 29) mg kg −1 [measured with ICP‐OES after microwave‐assisted (Milestone UltraWAVE, Italy) digestion with HNO 3 , H 2 O 2 , and HF].…”

Section: Methodsmentioning

confidence: 99%

Plant availability of phosphorus from dewatered sewage sludge, untreated incineration ashes, and other products recovered from a wastewater treatment system

Lemming

Bruun

Jensen

et al. 2017

J. Plant Nutr. Soil Sci.

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The objective of the present study was to evaluate the plant phosphorus (P) availability of products derived from new P‐recovery technologies deployed in wastewater treatment systems against sewage sludge and untreated sewage sludge ashes. Eight P sources were evaluated in a six‐week pot experiment with spring barley (Hordeum vulgare L.) and a soil incubation experiment with anaerobically digested and dewatered sewage sludge (Sludge), sewage sludge ash (Ash), thermochemically treated sewage sludge ash (TrAsh), struvite (Struv), concentrate (Conc), and centrifuged concentrate (Prec) from evaporated reject water, with triple super phosphate (TSP), and composted organic household waste (Comp) as references. All sludge‐related materials except struvite came from the same wastewater treatment plant in Denmark. The apparent plant P use efficiency (PUE) of the treatments in the pot experiments was in the following order: Prec (17.0%) > TSP (12.8%) ≥ Conc (12.7%) > Sludge (8.8%) ≥ TrAsh (6.9%) ≥ Struv (6.0%) ≥ Comp (5.8%) > Ash (3.4%). The water‐extractable P (WEP) in the incubation experiment largely supported this order and there was a strong correlation between WEP in the incubation experiment and plant P uptake in the pot experiment. Overall, the results of this study demonstrate that it should not automatically be assumed that products recovered with new treatment technologies for P recovery are more effective P fertilizers than the sewage sludge from which they originate. Furthermore, these results indicate that the measurement of water‐extractable P after soil incubation could be a suitable proxy for plant P availability.

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“…The CRUCIAL field trial simulates more than 100 yr of organic waste disposal according to current Danish agricultural practice (Lekfeldt et al, 2014). Since 2003, 11 treatments have been applied on 33 plots of 891 m 2 each (López‐Rayo et al, 2016). A continuous crop rotation using different cereals has been performed on the site.…”

Section: Methodsmentioning

confidence: 99%

Long‐term Effects of Organic Waste Fertilizers on Soil Structure, Tracer Transport, and Leaching of Colloids

2017

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Organic waste fertilizers have previously been observed to significantly affect soil organic carbon (SOC) content and soil structure. However, the effect of organic waste fertilizers on colloid dispersibility and leaching of colloids from topsoil has not yet been studied extensively. We investigated how the repeated application of different types of agricultural (liquid cattle slurry and solid cattle manure) and urban waste fertilizers (sewage sludge and composted organic household waste) affected soil physical properties, colloid dispersion from aggregates, tracer transport, and colloid leaching from intact soil cores. Total porosity was positively correlated with SOC content. Yearly applications of sewage sludge increased absolute microporosity (pores <30 μm) and decreased relative macroporosity (pores >30 μm) compared with the unfertilized control, whereas organic household waste compost fertilization increased both total porosity and the absolute porosity in all pore size classes (though not significant for 100-600 μm). Treatments receiving large amounts of organic fertilizers exhibited significantly lower levels of dispersible colloids compared with an unfertilized control and a treatment that had received moderate applications of cattle slurry. The content of water-dispersible colloids could not be explained by a single factor, but differences in SOC content, electrical conductivity, and sodium adsorption ratio were important factors. Moreover, we found that the fertilizer treatments did not significantly affect the solute transport properties of the topsoil. Finally, we found that the leaching of soil colloids was significantly decreased in treatments that had received large amounts of organic waste fertilizers, and we ascribe this primarily to treatment-induced differences in effluent electrical conductivity during leaching.

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Long-term amendment of urban and animal wastes equivalent to more than 100 years of application had minimal effect on plant uptake of potentially toxic elements

Cited by 50 publications

References 38 publications

Investigating the uptake and acquisition of potentially toxic elements in plants and health risks associated with the addition of fresh biowaste amendments to industrially contaminated soil

Investigating the uptake and acquisition of potentially toxic elements in plants and health risks associated with the addition of fresh biowaste amendments to industrially contaminated soil

Plant availability of phosphorus from dewatered sewage sludge, untreated incineration ashes, and other products recovered from a wastewater treatment system

Long‐term Effects of Organic Waste Fertilizers on Soil Structure, Tracer Transport, and Leaching of Colloids

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