Bioleaching of heavy metals contaminated sediment by pure and mixed cultures of Acidithiobacillus spp.

Akıncı, Görkem; Guven, Duyusen E.

doi:10.1016/j.desal.2010.10.032

Cited by 77 publications

(21 citation statements)

References 12 publications

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“…The acid-reducing environment generated by Acidithiobacillus metabolism onto elemental sulphur particles (Quintana et al 2001;Viera et al 2003) may be capable of the efficient leaching of the fractions of copper and zinc associated with Fe(III) and Mn(IV) oxides, because of the dissolution of these oxides by reduction to more soluble Fe(II) and Mn(II) compounds. In agreement with Akinci and Guven (2011), an enrichment of both (Zn and Cu) metals in the exchangeable fraction after leaching was observed. As will be discussed later, newly formed phases of iron and calcium sulphates were detected in the bioleached sediment by XRD analysis.…”

Section: Resultssupporting

confidence: 84%

“…Following the hypothesis that the same oxidation/ acidification processes produce a serious environmental impact under no controlled conditions has, in turn, under controlled conditions, the potentiality of recovering valuable metals from polluted sediments, as it was studied in several papers (Gadd 2010;Akinci and Guven 2011;Ye et al 2013). The particular characteristics of each sediment are strongly determinants of the kinetics and efficiency of metal extraction by bioleaching (Calmano et al 1993;Löser et al 2006Löser et al , 2007Zehnsdorf et al 2013).…”

Section: Responsible Editor: Robert Duranmentioning

confidence: 98%

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Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy

Porzionato

Tufo

Candal

et al. 2016

Environ Sci Pollut Res

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Anaerobic sediments of urban watercourses are subjected to industrial pollution and frequently tend to accumulate heavy metals. The biocatalyzed oxidation and reduction of sulphur compounds that occur within the sediment are key reactions that determine mobility of metals such as that occurred in mine acidic drainage reactions. The aim of this work was to study the application of these processes using heap leaching technology for the remediation of anaerobic contaminated sediments from Reconquista River basin. The bioleaching potentiality for remediation was demonstrated through batch tests in shake flasks with different pulp densities of anaerobic sediment containing 338 mg kg of Zn and 117 mg kg of Cu. Subsequently, bioleaching heap systems were compiled into columns of 12-cm height and 6-cm diameter, fitted with perlite to improve drainage. In order to assess the effect of elementary sulphur over the mobility of metals from the bioheap to the aqueous solution, increasing concentrations of elementary sulphur (1, 2, 5 % w/w) were added. After 3 months of acidification generated by periodic watering, the extraction of 70 % of the initial Zn and 43 % of the initial Cu was achieved. Polluted sediments from waterways as Reconquista River should not be indiscriminately manipulated if acid drainage is possible. Remediation by a simple and economically viable strategy like heap leaching is feasible.

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Section: Resultssupporting

confidence: 84%

Section: Responsible Editor: Robert Duranmentioning

confidence: 98%

Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy

Porzionato

Tufo

Candal

et al. 2016

Environ Sci Pollut Res

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“…In previous bioleaching with pure and mixed cultures of Acidithiobacillus spp., the system with pure A. thiooxidans got the best acidification effect, and then followed by the mixed culture and A. ferrooxidans. It was generally recognized that A. thiooxidans played the most important role in bioleaching process (Akinci and Guven 2011), while the community analysis in this research showed a different result. It mainly related to the substrate and microbe composition.…”

Section: Bacteria Community Dynamic and Canonical Correspondence Analmentioning

confidence: 93%

“…The dominant mesophiles applied in sediment or sludge bioleaching are Acidithiobacillus species including Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans (Akinci and Guven 2011;Chen and Lin 2004a, b). Both are chemolithotrophic bacteria and can get energy from reduced sulfur compounds, the former also possesses ferrous iron oxidation ability (Zhang et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Bioleaching of multiple heavy metals from contaminated sediment by mesophile consortium

Gan

Zhou

et al. 2014

Environ Sci Pollut Res

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A defined mesophile consortium including Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirilum ferriphilum was applied in bioleaching sediments contaminated with multiple heavy metals. Flask experiments showed that sulfur favored the acidification in the early stage while pyrite led to a great acidification potential in the later stage. An equal sulfur/pyrite ratio got the best acidification effect. Substrate utilization started with sulfur in the early stage, and then the pH decline and the community shift give rise to the utilization of pyrite. Solubilization efficiency of Zn, Cu, Mn, and Cd reached 96.1, 93.3, 92.13, and 87.65%, respectively. Bioleaching efficiency of other elements (As, Hg, Pb) was not more than 30%. Heavy metal solubilization was highly negatively correlated with pH variation. Logistic models were well fitted with the solubilization efficiency, which can be used to predict the bioleaching process. The dominant species in the early stage of bioleaching were A. ferrooxidans and A. thiooxidans, and the abundance of L. ferriphilum increased together with pyrite utilization and pH decline.

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“…[27]. Çinkonun yüksek mobilitesinin bir kanıtı da, çalışılan metaller içinde topraktan bitkiye geçen transfer katsayısı en yüksek metal olmasıdır (ortalama 1,33).…”

Section: Ağır Metallerin Topraktan Bitkiye Transferi (Heavy Metals Trunclassified

DERİ ARITMA ÇAMURU KOMPOSTU İLAVESİYE GERÇEKLEŞTİRİLEN ÇİM YETİŞTİRİCİLİĞİNDE Cr, Cu, Zn VE Ni METALLERİNİN KİMYASAL DAĞILIMI VE BİTKİYE TRANSFERİ

Guven¹,

Akıncı²,

Gök³

2016

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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:Araştırma kapsamında, farklı oranlarda deri arıtma çamuru kompostu ilave edilen funda toprağında çim yetiştirilmiş ve 45 günlük deney periyodu sonunda Cr, Cu, Zn ve Ni metallerinin bitkiye transfer katsayıları belirlenmiştir. Çalışmanın temel amacı sözkonusu metallerin toprak-kompost karışımında bağlı bulundukları kimyasal bağlanma formlarının dağılımını tespit ederek, bu dağılımın metalin bitkiye transferindeki etkisini irdelemektir. Deney sonuçlarına göre, toprağa kütlece %5 ve %10 oranında kompost ilavesinin bitki gelişimini %29-32 oranında arttırdığı görülmüştür. Ağır metallerin bitkiye transfer katsayıları büyükten küçüğe Zn>Cu>Ni>Cr olarak bulunmuştur. Ağır metallerin topraktaki kimyasal bağlanma formlarının bitkiye transferlerinde doğrudan etkisi olduğu anlaşılmıştır. Karışımlarda, toplam konsantrasyonu yüksek olan Cr büyük oranda (%47,24-76,09) hareketsiz (immobil) haldeki kalıntı fraksiyonda bulunmaktadır. Bu durum, krom için tespit edilen düşük transfer katsayılarını açıklamaktadır. Zn ise deneme topraklarında yüksek oranda kararsız fraksiyonlarda bulunmakta (toplamda %34,78-75,07) ve toprak-bitki etkileşiminde mobil davranarak çim bitkisine kolaylıkla transfer olmaktadır. Cu ve Ni yüksek oranda organik fraksiyona bağlı olup, transfer katsayıları deneme sırasında mineralize olan organik madde ile orantılıdır. DOIThe major goal of this work is to determine the chemical fractionation of Cr, Cu, Zn and Ni in the soil amended with different doses of tannery sludge compost and investigate chemical distribution impact on the metals' transfer to grass at the end of the 45 days experimental period. The results show that %5 and%10 tannery sludge compost amendment enhances the plant growth at the rate of 29-32%. The transfer coefficients for the metals in the decreasing order are as follows: Zn>Cu>Ni>Cr. It is found that the chemical distribution of the metals is directly related to the metals' soil-plant transfer. Although total Cr concentrations in the mixtures are high, Cr is mainly found in the residual fraction which is the most stable form in the mixtures (47.24-76.09%). This explains the low transfer coefficients calculated for Cr. Zn is the most mobile metal which is highly found in the exchangable & acid soluble and reducible fractions (total 34.78-75.07%). Zn is easily released from soil and accumulate in the plant tissue resulting as the highest transfer coefficients. Cu and Ni are densely found in the organic fraction which is demineralised during the trials, confirming the transfer coefficients calculated for these metals.10.17341/gummfd.93335

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Bioleaching of heavy metals contaminated sediment by pure and mixed cultures of Acidithiobacillus spp.

Cited by 77 publications

References 12 publications

Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy

Metal bioleaching from anaerobic sediments from Reconquista River basin (Argentina) as a potential remediation strategy

Bioleaching of multiple heavy metals from contaminated sediment by mesophile consortium

DERİ ARITMA ÇAMURU KOMPOSTU İLAVESİYE GERÇEKLEŞTİRİLEN ÇİM YETİŞTİRİCİLİĞİNDE Cr, Cu, Zn VE Ni METALLERİNİN KİMYASAL DAĞILIMI VE BİTKİYE TRANSFERİ

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