Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

MgAl-LDH-biochar composites as a green sorbent for lead removal from water

100%

Idan I. J., Al-Rifaie J. K., Ewadh H. M.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

|

2021

|

tom 30

|

nr 2[92]

2

Use of biochar as media for propagation of some difficult-to-root ornamental plants

86%

Adzraku H.-V., Tandoh P. K., Zurei L. H.

Environment, Earth and Ecology

|

2017

|

tom 1

|

nr 2

A study was carried out at the Department of Horticulture, KNUST from 8th January, 2017 to 17th March, 2017 to determine the best propagating medium for Ixora coccinea and Ficus pumila. The design was a Complete Randomized Design with four treatments replicated three times. The treatments were; topsoil only, biochar only, mixture of topsoil and biochar (1:1) and mixture of topsoil and biochar (2:1) . The study revealed that the treatment with the mixture of topsoil and biochar (2:1) was the best medium, in terms of physical and chemical properties and produced the highest number of leaves and rooted cuttings in Ficus pumila. Topsoil only had highest number of leaves and roots for Ixora coccinea. The biochar medium started rooting earlier for Ficus pumila at 2 weeks and recorded the highest number of leaves, while that of Ixora coccinea rooted at the fourth week towards the fifth week. The study concluded that mixture of topsoil and biochar (2:1) could be used for propagating difficult to root ornamental plants whiles Biochar only could also be used to propagate Ficus pumila.

3

Nutrients and heavy metals in biochar produced by sewage sludge pyrolysis: its application in soil amendment

86%

Liu T., Liu B., Zhang W.

Polish Journal of Environmental Studies

|

2014

|

tom 23

|

nr 1

The production of sewage sludge has been sharply increasing by municipal sludge treatment plants in China. Sewage sludge is a difficult waste to manage not only due to the high quantities produced but also due to its high concentration of heavy metals and pathogens. The pyrolytic conversion of sewage sludge to biochar and then applied to the land is a sustainable management potion. Therefore, the aim of this work is to evaluate the characteristics of nutrients and heavy metals in biochar from sewage sludge pyrolysis, and pot experiments were carried out with different treatments consisting of infertile and contaminated soils. The results showed that the content of major plant nutrients (N, P, K) in sewage sludge biochar meets agricultural requirements. The concentrations of heavy metals (Cu, Pb, Zn, Cd, and Cr) were evidently increased in biochar, but those of available heavy metals were decreased. The sewage sludge biochar can improve soil fertility and enhance plant growth while not increasing plant uptake of heavy metals, and remedied contaminated soil by reducing the plant availability of heavy metals.

4

Hygroscopic moisture content of podzolic soil with biochar

86%

Cybulak M., Sokolowska Z., Boguta P.

Acta Agrophysica

|

2016

|

tom 23

|

nr 4

The main goal of this study was to investigate the effect of biochar on hygroscopic water content (maximum hygroscopicity) of grey-brown podzolic soil (Haplic Luvisol). The biochar was applied to the soil of sub-plots under fallow and grassland in the amount of 0 (control), 10, 20 and 30 Mg·haˉ¹. Soil samples were taken three times per year during the period of 2013-2015. Sorption isotherms of water vapour were determined for all studied samples and the maximum hygroscopicity (MH) was calculated from the relative water vapour pressure at p·p0ˉ¹ = 0.965. Value of the MH varied from 1.5 to 3%. The effect of biochar addition to soil on hygroscopic water content was ambiguous. Addition of biochar caused a slight decrease in MH value in the case of the grassland. For the fallow, a positive effect of biochar addition was observed.

5

Evaluation of the changes induced by gasification biochar in a peat-sand substrate

72%

Muter O., Lebedeva G., Telysheva G.

International Agrophysics

|

2014

|

tom 28

|

nr 4

Gasification biochar represents one of the biochar types tested for agricultural needs. The aim of this study was to clarify the physico-chemical and biological changes occurring in a peat-sand substrate amended with hardwood-derived gasification biochar in the rates of 2, 4 and 20 g l-1. The pH(H2O) of the substrate with 4 g l-1 and 20 g l-1 biochar was increased from 5.6 to 6.2 and 6.7, respectively. The testing of the substrate in the re- spirometry device showed that the increase in the biochar rate led to a decrease in the amount of CO2 evolved at the maximum pressure drop. The continuous decrease in pressure observed in the respirometry bottles filled with pure biochar allows explaining this effect by biochar sorption activity. Addition of 2 and 4 g l-1 biochar to the peat-sand substrate stimulated the growth of cucumbers in an 18-day pot vegetation experiment. An increase in the number of root tips and root volume with a decreasing average root diameter was shown in the presence of biochar. Stimulation of plant growth on the background of low rates of biochar requires a further study with emphasis on the specific combination of biochar, soil type, plant species, and climatic conditions.

6

Fractional composition of humic compounds and the capacity to bind cadmium ions from the solution by biologically and thermally processed Miscanthus giganteus biomass

72%

Gondek K., Mierzwa-Hersztek M., Kopec M.

Acta Agrophysica

|

2016

|

tom 23

|

nr 3

The capacity of functional groups of soil organic matter to form organometallic complexes may efficiently reduce the risk of migration of toxic ions of heavy metals in the environment. Therefore, a research was conducted to determine the effect of composting and pyrolysis of Miscanthus giganteus biomass on the quality of humic compounds and on the ability of these materials to bind cadmium ions from the solution. Both processes did not cause any significantly favorable changes in fractional composition of the humic compounds of the transformed Miscanthus giganteus biomass. In the case of the unprocessed and composted biomass, changes in cadmium sorption by the materials used in the research, depending on Cd dose and how long the sample was in contact with the solution, had a similar course, which indicates that the responses taking place directly after the application of the solution that contained Cd ions were stable. In the case of thermal processing of Miscanthus giganteus biomass, it was found that Cd content in the solution decreased with time. Lower cadmium concentrations in the extracts after separation of the biomass were determined in the series with biologically transformed Miscanthus giganteus.

7

Effect of the composting process on physical and energetic changes in compost

72%

Kopec M., Gondek K., Mierzwa-Hersztek M., Zaleski T.

Acta Agrophysica

|

2016

|

tom 23

|

nr 4

Composting is one of the most common methods of treating biodegradable waste, and application of the process’ final product into the soil is, due to the high carbon content, one of the most rational ways of its management. If the compost is not in line with legal requirements, it is necessary to search for alternative ways of its use, such as application for energy purposes. The aim of this study was to estimate differences in the physical, including energetic, properties of composts prepared from plant feedstock with additions of such materials as biochar, sewage sludge, coffee grounds and yeast effluent. The composting process was carried out for 140 days. The basic chemical and physical properties as well as heat of combustion were determined in the analysed feedstocks and mixtures derived from them. It was found that 10% addition of biochar had no significant effect on the composting process rate; however, biochar-amended treatments showed a smaller loss of dry matter and higher C:N ratio compared to other combinations. The use of biochar or coffee grounds as additives in the composting process reduced volumetric density of the composted biomass. Maize straw amended with sewage sludge and coffee grounds reduced air-filled porosity of composts. The share of biochar in the compost limited this tendency. The heat of combustion determined in composts was lower than the parameter determined in material mixtures before the composting process. The results show that sewage sludge reduced the heat of combustion of composts, which was closely related to ash content.

8

Active carbons from plum stones

72%

Pawlicka A., Doczekalska B., Bartkowiak M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

|

2012

|

tom 79

9

Thermogravimetric studies of carbonizates from lignocellulosic materials

72%

Pawlicka A., Doczekalska B., Bartkowiak M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

|

2012

|

tom 79

10

Biochar from residual biomass in Turkey, and possibility of return to the soil: an estimation of the supply and demand

58%

Kutlu O., Kocar G.

Polish Journal of Agronomy

|

2017

|

nr 30

The aim of the study was to analyse the potential of production and utilization of biochar as a marketable product in agriculture for Turkey. Towards this aim, the distribution of arable land, crop residues and soil types of Turkey were identified. The biochar production potential was evaluated depending on prominent residual biomass streams in Turkey. In addition, how much biochar would be needed for arable soil types found in Turkey was estimated according to previous studies which investigated the effect of biochar on similar soil taxonomy and/or plant grown. Total crop production is focused on southern, western and central Anatolia, although the arable lands of Turkey prevail in seven regions. The residues of wheat, barley, corn and cotton stalk, tea, banana, hazelnuts and forest were found to be higher than other residuals in different regions and they could be suitable for biochar production. Furthermore, it was highlighted that the low water holding capacity of soil, alkalinity, salinity and soil pollution impeded the crop productivity. Although, the biochar produced from prominent residues was one-fiftieth less than that of total estimated amount of biochar needed for arable soils, it obviously improves the plant growth and soil characteristics, when used together with fertilizer, especially for zonal and intrazonal soils. At this point, it could be focused on the long-term field experiments due to determine the special and productive addition rate of biochar for Turkey, and biochar addition to the soil could be channelled into threatened priority arable lands by the public authorities.

11

Biochar! Pasja życia!

58%

Bedkowska A.

GLOBEnergia : Odnawialne Źródła Energii

|

2014

|

nr 5

Ograniczanie wyników

MgAl-LDH-biochar composites as a green sorbent for lead removal from water

Use of biochar as media for propagation of some difficult-to-root ornamental plants

Nutrients and heavy metals in biochar produced by sewage sludge pyrolysis: its application in soil amendment

Hygroscopic moisture content of podzolic soil with biochar

Evaluation of the changes induced by gasification biochar in a peat-sand substrate

Fractional composition of humic compounds and the capacity to bind cadmium ions from the solution by biologically and thermally processed Miscanthus giganteus biomass

Effect of the composting process on physical and energetic changes in compost

Active carbons from plum stones

Thermogravimetric studies of carbonizates from lignocellulosic materials

Biochar from residual biomass in Turkey, and possibility of return to the soil: an estimation of the supply and demand

Biochar! Pasja życia!