Heavy metals fractionation before, during and after composting of sewage sludge with natural zeolite

Zorpas, Antonis A.; Inglezakis, Vassilis J.; Loizidou, M.

doi:10.1016/j.wasman.2007.09.006

Cited by 70 publications

(48 citation statements)

References 15 publications

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“…At the end of the cultivation period, Zn content in the soluble form was about 10 mg kg -1 , coincident with the original content in the biosolid (Table 1). In general, the results in the literature show low percentages of heavy metals bound to the soluble fraction, in both composted and non-composted residues, being always in equilibrium with the exchangeable fraction (Amir et al, 2005;Zorpas et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Copper and zinc fractionation in biosolid cultivated with Pennisetum purpureum in different periods

Oliveira

Cardoso

Sousa

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TIn order to reduce the effect of heavy metals on the biosolid, it is necessary to promote its phytoremediation. It is important to know the total content and chemical forms of these elements in the residue for analyzing its behavior and potential toxicity. Thus, the aim of this study was to evaluate the fractionation and behavior of Cu and Zn in biosolid cultivated with Pennisetum purpureum in different periods. The experiment was carried out using a randomized complete block design. The treatments, with five replicates, corresponded to Pennisetum purpureum cultivation in biosolid for 30, 60, 90, 120 and 150 days after planting. The total contents of Cu and Zn in the biosolid remained below the critical limits established by the CONAMA Resolution 357, and there was a reduction in these values with Pennisetum purpureum cultivation. Furthermore, the increment in the grass cultivation period caused intense reduction of Zn contents bound to organic matter, but there was an increase in soluble Zn and residual Zn. Additionally, there was an intense reduction in the content of Cu bound to sulfides. Therefore, for biosolid phytoremediation purposes, the grass should be cultivated for 150 days.Fracionamento de cobre e zinco em biossólido cultivado com Pennisetum purpureum em diferentes períodos R E S U M O Para atenuar o efeito da presença de metais pesados no biossólido, faz-se necessária a sua fitorremediação, sendo fundamental o conhecimento das concentrações totais e das formas químicas destes elementos no resíduo para fins de análise do seu comportamento e potencial toxicidade. Assim, objetivou-se avaliar o comportamento e fracionamento do Cu e Zn em biossólido cultivado com Pennisetum purpureum em diferentes períodos. O experimento foi realizado utilizando-se delineamento em blocos casualizados. Os tratamentos, em cinco repetições, corresponderam ao cultivo de Pennisetum purpureum em biossólido por 30, 60, 90, 120 e 150 dias a partir do plantio. As concentrações totais de Cu e Zn no biossólido ficaram abaixo dos limites críticos da Resolução CONAMA 375, havendo redução destes valores com o cultivo de Pennisetum purpureum. Além disso, o incremento do período de cultivo da gramínea causou intensa redução da concentração de Zn ligado à matéria orgânica; por outro lado, houve aumento do Zn solúvel e residual. Já para o Cu houve intensa redução da concentração do elemento ligado a sulfetos. Assim, para fins de fitorremediação do biossólido, recomenda-se o plantio da gramínea por 150 dias. Key words:sequential extraction sewage sludge speciation of heavy metals Palavras-chave: especiação de metais pesados extração sequencial lodo de esgoto

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Section: Resultsmentioning

confidence: 99%

Copper and zinc fractionation in biosolid cultivated with Pennisetum purpureum in different periods

Oliveira

Cardoso

Sousa

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…Stylianou et al [124] used natural clinoptilolite to improve compost quality, and reported that the content of Zn decreased by 94.1%, Cu by 59.5%, Cr by 82.2%, and Ni by 69% when 20% w/w clinoptilolite was mixed with sewage sludge in a pilot bioreactor. Zorpas et al [80] observed that the clinoptilolite binded almost all of the available metals from the exchangeable and the carbonate fractions (except Zn). Even in the case of acid rain, clinoptilolite had the ability to retain heavy metals and not let them pass into groundwater.…”

Section: Synergistic Effects Of Different Immobilizing Methodsmentioning

confidence: 99%

“…In order to ensure the safe use of compost, it is necessary to study the speciation transformation of heavy metals and their bioavailability during the process. Many researchers have been dedicated to studying the bioavailability of heavy metals during the composting process [47,54,80].…”

Section: Sewage Sludge Compostingmentioning

confidence: 99%

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Zhang

Wang

2017

Sustainability

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Abstract:The safe disposal of sewage sludge during the process of municipal wastewater treatment has become one of the major concerns of increased production. Land application was thought of as a more economical method for sewage sludge disposal than landfill and incineration. However, the presence of heavy metals in sewage sludge restricted the use of land application. The environmental risk of heavy metals was dependent on their contents, chemical speciations, and soil characteristics. Composting and chemical immobilization were the commonly used methods to immobilize the heavy metals in sewage sludge. The immobilization mechanism and speciation transformation of heavy metals during the composting process were presented. Aluminosilicate, phosphorus-bearing materials, basic compounds, and sulfides were reviewed as the commonly used chemical immobilizing agents. The problems that occur during the immobilization process were also discussed. The combination of different methods and the modification of chemical immobilizing agents both improved the fixation effect on heavy metals.

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“…A higher addition of natural zeolite in the RDC process could hold the high amount of moisture that reduced the microbial activity [13]. Zorpas et al [37] reported that the heavy metals contents were greatly decreased by approximately 100, 17, 31.7, 35.1, 24.0, 60.0, 56.7, and 47.9% for Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn, respectively, in the process of composting of sewage sludge with zeolite. Zorpas et al [38] concluded that the addition of 25% (w/w) zeolite in compost is adequate to eliminate around 12-60% of the heavy metals during sewage sludge composting.…”

Section: Total Concentration Of Heavy Metalsmentioning

confidence: 99%

“…Sprynskyy et al [14] reported that the addition of 9.09% clinoptilolite to the sludge reduced the total concentration of metals to around 11-51%. The increases in the concentration of heavy metals in the composting process were mainly because of the losses of mass [37]. Table 2.…”

Section: Total Concentration Of Heavy Metalsmentioning

confidence: 99%

Effects of Natural Zeolites on Bioavailability and Leachability of Heavy Metals in the Composting Process of Biodegradable Wastes

Singh¹,

Kalamdhad²,

Lee³

2016

Zeolites - Useful Minerals

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The bioavailability and leachability of heavy metals play an important role in the toxicity of heavy metals in the final compost followed by land application. This chapter examines the effects of natural zeolite on bioavailability of heavy metals (Zn, Cu, Mn, Fe, Ni, Pb, Cd, and Cr) in the form of water soluble and diethylenetriaminepentaacetic acid (DTPA) extractable. The toxicity characteristic leaching procedure (TCLP) test was performed to examine the leachability of heavy metals. Water solubility, DTPA extractability, leachability, and most bioavailable fractions were reduced during agitated pile composting (APC) and rotary drum composting (RDC) of water hyacinth with zeolite addition. The addition of the natural zeolite (clinoptilolite) during the composting process led to an increase in Na, Ca, and K concentrations and significantly reduced the water solubility and DTPA and TCLP extractability of heavy metals. The addition of an appropriate amount of natural zeolite during the composting process enhanced the organic matter degradation, thereby increasing the conversion into the most stabilized organic matter and reducing the bioavailability and leachability of heavy metals.

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Heavy metals fractionation before, during and after composting of sewage sludge with natural zeolite

Cited by 70 publications

References 15 publications

Copper and zinc fractionation in biosolid cultivated with Pennisetum purpureum in different periods

Copper and zinc fractionation in biosolid cultivated with Pennisetum purpureum in different periods

Immobilization of Heavy Metals in Sewage Sludge during Land Application Process in China: A Review

Effects of Natural Zeolites on Bioavailability and Leachability of Heavy Metals in the Composting Process of Biodegradable Wastes

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