Leachability and Vegetable Absorption of Heavy Metals from Sewage Sludge Biochar

Yachigo, Mieko; Sato, Shuko

doi:10.5772/55123

Cited by 11 publications

(16 citation statements)

References 24 publications

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“…According to Song and Guo [27], the recommended temperature of material pyrolysis for agricultural purposes is approximately 300°C. In the studies conducted by Yachigo and Sato [39], higher pyrolysis temperature resulted in a considerable increase in the zinc and copper contents in the resulting material, but it did not change the cadmium content. In the view of He et al [40], the pyrolysis temperature exceeding 350°C results in a greater stability of such trace element as Cd, Pb, Zn and Cu.…”

Section: Elemental Composition Of Biocharsmentioning

confidence: 99%

The Effect of Low-Temperature Conversion of Plant Materials on the Chemical Composition and Ecotoxicity of Biochars

Gondek

Mierzwa–Hersztek

Baran

et al. 2016

Waste Biomass Valor

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The chemical composition of biochars varies considerably depending on the chemical composition of biomass used for its production and conditions of the thermal conversion process. In the context of chemical composition, biochars are different from other types of organic matter in that they contain many more aromatic carbon compounds. The aims of this study were as follows:(1) to investigate the effect of pyrolysis process of plant material on the concentrations of macroelements, trace elements and polycyclic aromatic hydrocarbons (PAHs) in the biochars; (2) to evaluate the ecotoxicity of the biochars; (3) to integrate chemical and toxicity properties of biochars in order to assess their safe utilisation as fertiliser materials. It was found that the elemental composition, the contents of macronutrients and trace elements in biochars were determined by the type of converted biomass. In the case of contents of volatile elements, such as nitrogen and sulphur, the process conditions were of great importance. Among the analysed trace elements, only the cadmium content exceeded the limit value for premium class biochars. The process of thermal conversion of organic materials did not cause mobilisation of available forms of most of the studied trace elements. In the course of the study, it was found that the extracts from wheat straw biochar (WSB) were low-toxic, while the extracts from biochars derived from rape straw (RSB), Miscanthus straw (MSB), sawdust (SB), bark (BB) and leaves of trees (LTB) were highly toxic to V. fischeri. Based on the response of the test organism, the analysed biochars were arranged in the following order: WSB \ BB \ RSB \ LTB \ MSB \ SB. The highest total content of PAHs ( P 16 PAHs) was determined in rape straw biochar, and the lowest, in sawdust biochar. The studies revealed a negative correlation between the content of most of PAHs and inhibition of Vibrio fischeri luminescence. Graphical Abstract

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Section: Elemental Composition Of Biocharsmentioning

confidence: 99%

The Effect of Low-Temperature Conversion of Plant Materials on the Chemical Composition and Ecotoxicity of Biochars

Gondek

Mierzwa–Hersztek

Baran

et al. 2016

Waste Biomass Valor

View full text Add to dashboard Cite

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“…According to Song and Guo [29], the suggested temperature, for agricultural purposes, of pyrolysis of materials should be approximately 300°C. In research conducted by Yachigo and Sato [38], an increase in the temperature of pyrolysis caused a distinct increase in the content of zinc and copper in the obtained material, whereas no changes in the cadmium content were registered. As a result of conducting the process at temperatures of 300 and 600°C, no higher differences in the content of copper and nickel forms extracted with water were detected (Figs.…”

Section: Chemical Composition Of the Materialsmentioning

confidence: 99%

Impact of thermal treatment of mixtures of sewage sludge and plant material on selected chemical properties and Vibrio fischeri response

Gondek

Baran

Mierzwa–Hersztek

et al. 2017

Ecological Chemistry and Engineering S

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Abstract:The aim of the research was to evaluate the effect of temperature during the treatment process as well as the effect of adding plant materials to sewage sludge on selected chemical properties and Vibrio fischeri response. The mixtures were placed in a chamber furnace, under airless conditions. Two temperature procedures were applied: 300 and 600ºC; the exposure time in both cases was 15 minutes. Thermal treatment of sewage sludge without a plant component is not well-founded and may cause an increase in concentration of trace elements. Using the temperature of 300ºC caused significantly lower changes in the contents of total forms of trace elements than using the temperature of 600ºC. The metals extracted from the studied mixtures were not toxic for the Vibrio fischeri. In the case of the fractional composition of humic compounds, thermal treatment of mixtures of sewage sludge and plant materials is not beneficial in terms of labile fractions, but it had a beneficial effect on stabilizing the durable bonds between C compounds in those mixtures.

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“…These wastewaters are associated with high concentrations of dissolved metal salts (heavy metals) and may include some domestic sewage, but the domestic sewage is not the main component (Rao et al 2012;Yachigo and Sato 2013).…”

Section: Introductionmentioning

confidence: 99%

Removal of pathogenic bacteria from sewage-treated effluent and biosolids for agricultural purposes

et al. 2018

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The reuse of treated sewage for irrigation is considered as an important alternative water source in the new water management strategy of the countries that face a severe deficiency of water resources such as the Middle East countries. The organic material and fertilizing elements contained in biosolids are essential for maintaining soil fertility. However, both treated sewage and biosolids contain a large diversity of pathogens that would be transmitted to the environment and infect human directly or indirectly. Therefore, those pathogens should be reduced from the treated sewage and biosolids before the reuse in the agriculture. This paper reviews the considerations for reuse of treated sewage and biosolids in agriculture and further treatments used for reduction of pathogenic bacteria. The treatment methods used for the reduction of pathogens in these wastes have reviewed. It appeared that the main concern associated with the reduction of pathogenic bacteria lies in their ability to regrow in the treated sewage and biosolids. Therefore, the effective treatment method is that it has the potential to destruct pathogens cells and remove the nutrients to prevent the regrowth or recontamination from the surrounded environment. The removal of nutrients might be applicable in the sewage but not in the biosolids due to high nutrient contents. However, the reduction of health risk in the biosolids might be carried out by regulating the biosolid utilization and selecting the plant species grown in the fertilized soil with biosolids.

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Leachability and Vegetable Absorption of Heavy Metals from Sewage Sludge Biochar

Cited by 11 publications

References 24 publications

The Effect of Low-Temperature Conversion of Plant Materials on the Chemical Composition and Ecotoxicity of Biochars

The Effect of Low-Temperature Conversion of Plant Materials on the Chemical Composition and Ecotoxicity of Biochars

Impact of thermal treatment of mixtures of sewage sludge and plant material on selected chemical properties and Vibrio fischeri response

Removal of pathogenic bacteria from sewage-treated effluent and biosolids for agricultural purposes

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