The Experts below are selected from a list of 22797 Experts worldwide ranked by ideXlab platform
Johannes Knoetze - One of the best experts on this subject based on the ideXlab platform.
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Physico-chemical characterization of biochars from vacuum pyrolysis of South African agricultural wastes for application as Soil Amendments
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Ümit Uras, Marion Carrier, Ailsa Hardie, Johannes KnoetzeAbstract:The physico-chemical properties of biochars from the vacuum pyrolysis of black wattle and vineyard annual prunings were investigated for their potential as Soil Amendments and compared to biochar from sugarcane bagasse. Biochar from sugar cane bagasse seems to be a promising sorbent and Soil conditioner due to its high surface area, high surface acidity, and microporous structure. This biochar can be applied to a wide pH range of Soils for enhancing nutrient and water retention. On the other hand, the biochars from black wattle and vineyard possessing high concentrations of aromatic carbon, nutrients, and alkalinity are potential Soil Amendment agents. Black wattle biochar is more beneficial compared to biochar from vineyard due to its higher surface area, microporosity, and cation exchange capacity. Therefore, this study recommends the utilization of biochars from black wattle as Soil Amendment agents especially in subtropical regions.
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Production of char from vacuum pyrolysis of South-African sugar cane bagasse and its characterization as activated carbon and biochar
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Marion Carrier, Ümit Uras, Ailsa Hardie, Johann Görgens, Johannes KnoetzeAbstract:The potential of vacuum pyrolysis to convert sugar cane bagasse into char materials for wastewater treatment and Soil Amendment is the focus of this research paper. Vacuum pyrolysis produces both bio-oil and char in similar quantities. Vacuum pyrolysis has the potential to produce high quality chars for wastewater treatment and Soil Amendment directly during the conversion process, with no further upgrading required. In the present study, chars with the required porous structure was obtained directly from the vacuum pyrolysis process, making it very efficient as adsorbent both in terms of methylene blue (MB) adsorption with a N2-BET surface area of 418 m2 g−1. Further steam activation of the chars benefited the development of meso- and macroporosity, although this upgrading step was not essential to achieve the required performance of char as an MB adsorbent. The development of large pores during the vacuum pyrolysis favored physisorption of MB, rather than chemisorption. The chemical nature of the vacuum pyrolysis char resulted in a slightly acidic surface (pH 6.56). The biochar from vacuum pyrolysis can be considered as a highly beneficial Soil Amendment, as it would enhance Soil nutrient and water holding capacity, due to its high cation exchange capacity (122 cmolc kg−1) and high surface area. It is also a good source of beneficial plant macro- and micronutrients and contains negligible levels of toxic elements.
Marion Carrier - One of the best experts on this subject based on the ideXlab platform.
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Physico-chemical characterization of biochars from vacuum pyrolysis of South African agricultural wastes for application as Soil Amendments
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Ümit Uras, Marion Carrier, Ailsa Hardie, Johannes KnoetzeAbstract:The physico-chemical properties of biochars from the vacuum pyrolysis of black wattle and vineyard annual prunings were investigated for their potential as Soil Amendments and compared to biochar from sugarcane bagasse. Biochar from sugar cane bagasse seems to be a promising sorbent and Soil conditioner due to its high surface area, high surface acidity, and microporous structure. This biochar can be applied to a wide pH range of Soils for enhancing nutrient and water retention. On the other hand, the biochars from black wattle and vineyard possessing high concentrations of aromatic carbon, nutrients, and alkalinity are potential Soil Amendment agents. Black wattle biochar is more beneficial compared to biochar from vineyard due to its higher surface area, microporosity, and cation exchange capacity. Therefore, this study recommends the utilization of biochars from black wattle as Soil Amendment agents especially in subtropical regions.
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Production of char from vacuum pyrolysis of South-African sugar cane bagasse and its characterization as activated carbon and biochar
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Marion Carrier, Ümit Uras, Ailsa Hardie, Johann Görgens, Johannes KnoetzeAbstract:The potential of vacuum pyrolysis to convert sugar cane bagasse into char materials for wastewater treatment and Soil Amendment is the focus of this research paper. Vacuum pyrolysis produces both bio-oil and char in similar quantities. Vacuum pyrolysis has the potential to produce high quality chars for wastewater treatment and Soil Amendment directly during the conversion process, with no further upgrading required. In the present study, chars with the required porous structure was obtained directly from the vacuum pyrolysis process, making it very efficient as adsorbent both in terms of methylene blue (MB) adsorption with a N2-BET surface area of 418 m2 g−1. Further steam activation of the chars benefited the development of meso- and macroporosity, although this upgrading step was not essential to achieve the required performance of char as an MB adsorbent. The development of large pores during the vacuum pyrolysis favored physisorption of MB, rather than chemisorption. The chemical nature of the vacuum pyrolysis char resulted in a slightly acidic surface (pH 6.56). The biochar from vacuum pyrolysis can be considered as a highly beneficial Soil Amendment, as it would enhance Soil nutrient and water holding capacity, due to its high cation exchange capacity (122 cmolc kg−1) and high surface area. It is also a good source of beneficial plant macro- and micronutrients and contains negligible levels of toxic elements.
Ümit Uras - One of the best experts on this subject based on the ideXlab platform.
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Physico-chemical characterization of biochars from vacuum pyrolysis of South African agricultural wastes for application as Soil Amendments
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Ümit Uras, Marion Carrier, Ailsa Hardie, Johannes KnoetzeAbstract:The physico-chemical properties of biochars from the vacuum pyrolysis of black wattle and vineyard annual prunings were investigated for their potential as Soil Amendments and compared to biochar from sugarcane bagasse. Biochar from sugar cane bagasse seems to be a promising sorbent and Soil conditioner due to its high surface area, high surface acidity, and microporous structure. This biochar can be applied to a wide pH range of Soils for enhancing nutrient and water retention. On the other hand, the biochars from black wattle and vineyard possessing high concentrations of aromatic carbon, nutrients, and alkalinity are potential Soil Amendment agents. Black wattle biochar is more beneficial compared to biochar from vineyard due to its higher surface area, microporosity, and cation exchange capacity. Therefore, this study recommends the utilization of biochars from black wattle as Soil Amendment agents especially in subtropical regions.
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Production of char from vacuum pyrolysis of South-African sugar cane bagasse and its characterization as activated carbon and biochar
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Marion Carrier, Ümit Uras, Ailsa Hardie, Johann Görgens, Johannes KnoetzeAbstract:The potential of vacuum pyrolysis to convert sugar cane bagasse into char materials for wastewater treatment and Soil Amendment is the focus of this research paper. Vacuum pyrolysis produces both bio-oil and char in similar quantities. Vacuum pyrolysis has the potential to produce high quality chars for wastewater treatment and Soil Amendment directly during the conversion process, with no further upgrading required. In the present study, chars with the required porous structure was obtained directly from the vacuum pyrolysis process, making it very efficient as adsorbent both in terms of methylene blue (MB) adsorption with a N2-BET surface area of 418 m2 g−1. Further steam activation of the chars benefited the development of meso- and macroporosity, although this upgrading step was not essential to achieve the required performance of char as an MB adsorbent. The development of large pores during the vacuum pyrolysis favored physisorption of MB, rather than chemisorption. The chemical nature of the vacuum pyrolysis char resulted in a slightly acidic surface (pH 6.56). The biochar from vacuum pyrolysis can be considered as a highly beneficial Soil Amendment, as it would enhance Soil nutrient and water holding capacity, due to its high cation exchange capacity (122 cmolc kg−1) and high surface area. It is also a good source of beneficial plant macro- and micronutrients and contains negligible levels of toxic elements.
Ailsa Hardie - One of the best experts on this subject based on the ideXlab platform.
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Physico-chemical characterization of biochars from vacuum pyrolysis of South African agricultural wastes for application as Soil Amendments
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Ümit Uras, Marion Carrier, Ailsa Hardie, Johannes KnoetzeAbstract:The physico-chemical properties of biochars from the vacuum pyrolysis of black wattle and vineyard annual prunings were investigated for their potential as Soil Amendments and compared to biochar from sugarcane bagasse. Biochar from sugar cane bagasse seems to be a promising sorbent and Soil conditioner due to its high surface area, high surface acidity, and microporous structure. This biochar can be applied to a wide pH range of Soils for enhancing nutrient and water retention. On the other hand, the biochars from black wattle and vineyard possessing high concentrations of aromatic carbon, nutrients, and alkalinity are potential Soil Amendment agents. Black wattle biochar is more beneficial compared to biochar from vineyard due to its higher surface area, microporosity, and cation exchange capacity. Therefore, this study recommends the utilization of biochars from black wattle as Soil Amendment agents especially in subtropical regions.
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Production of char from vacuum pyrolysis of South-African sugar cane bagasse and its characterization as activated carbon and biochar
Journal of Analytical and Applied Pyrolysis, 2012Co-Authors: Marion Carrier, Ümit Uras, Ailsa Hardie, Johann Görgens, Johannes KnoetzeAbstract:The potential of vacuum pyrolysis to convert sugar cane bagasse into char materials for wastewater treatment and Soil Amendment is the focus of this research paper. Vacuum pyrolysis produces both bio-oil and char in similar quantities. Vacuum pyrolysis has the potential to produce high quality chars for wastewater treatment and Soil Amendment directly during the conversion process, with no further upgrading required. In the present study, chars with the required porous structure was obtained directly from the vacuum pyrolysis process, making it very efficient as adsorbent both in terms of methylene blue (MB) adsorption with a N2-BET surface area of 418 m2 g−1. Further steam activation of the chars benefited the development of meso- and macroporosity, although this upgrading step was not essential to achieve the required performance of char as an MB adsorbent. The development of large pores during the vacuum pyrolysis favored physisorption of MB, rather than chemisorption. The chemical nature of the vacuum pyrolysis char resulted in a slightly acidic surface (pH 6.56). The biochar from vacuum pyrolysis can be considered as a highly beneficial Soil Amendment, as it would enhance Soil nutrient and water holding capacity, due to its high cation exchange capacity (122 cmolc kg−1) and high surface area. It is also a good source of beneficial plant macro- and micronutrients and contains negligible levels of toxic elements.
Naeema Muhammad - One of the best experts on this subject based on the ideXlab platform.
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Land Application of Treated Sewage Sludge: Community Health and Environmental Justice
Environmental health perspectives, 2013Co-Authors: Amy Lowman, Mary Anne Mcdonald, Steve Wing, Naeema MuhammadAbstract:Background: In the United States, most of the treated sewage sludge (biosolids) is applied to farmland as a Soil Amendment. Critics suggest that rules regulating sewage sludge treatment and land ap...
