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Luo, Yanxin; Millero, Frank J.

doi:10.1023/a:1024568711020

Cited by 14 publications

(6 citation statements)

References 15 publications

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“…Moreover, abiotic dissolution of natural rhodochrosite caused release of dissolved Mn(II) (Fig. 3) (Jensen et al, 2002;Luo and Millero, 2003). Overall, when comparing to Fig.…”

Section: Oxidative Dissolution Of Rhodochrosite By P Putida Mnb1mentioning

confidence: 73%

“…Oxidative dissolution of rhodochrosite leads to produce dissociative Mn(II) and Mn oxides. The solubility of synthetic rhodochrosite in pure water and saline solution has been reported, meanwhile, rhodochrosite oxidation by O 2 or iron oxides is thermodynamically favorable, but the oxidation rate is rather slow (Diem and Stumm, 1984;Jensen et al, 2002;Luo and Millero, 2003;Duckworth and Martin, 2004;Madden and Hochella, 2005). Recently, oxidative dissolution of natural rhodochrosite by fungi has been reported (Tang et al, 2013).…”

Section: Role Of Extracellular Polymeric Substances (Eps) From Pseudo...mentioning

confidence: 99%

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Role of extracellular polymeric substances (EPS) from Pseudomonas putida strain MnB1 in dissolution of natural rhodochrosite

Wang

Pan

2014

Preprint

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Abstract. Microbially mediated oxidation of Mn(II) to Mn oxides have been demonstrated in previous studies, however, the mechanisms of bacteria how to dissolve and oxidize using a solid Mn(II) origin are poorly understood. In this study, we examined the role of extracellular polymeric substances (EPS) from P. putida strain MnB1 in enhancing dissolution of natural rhodochrosite. The results showed that P. putida strain MnB1 cell can effectively dissolve and oxidize natural rhodochrosite to generate Mn oxides, and EPS were found to play an important role in increasing dissolution of natural rhodochrosite. Compared with EPS-free treatment, dissolution rate of natural rhodochrosite in the presence of bacterial EPS was significantly increased with decreasing initial pH and increasing EPS concentration, ionic strength and rhodochrosite dosage (p < 0.05). The fourier-transform infrared spectroscopy (FTIR) analysis implies that the functional groups like N-H, C=O and C-H in EPS contributed to the dissolution of natural rhodochrosite. This study is helpful for understanding the mechanisms of the formation of biogenic Mn oxides using a solid Mn(II) origin.

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“…Moreover, abiotic dissolution of natural rhodochrosite caused release of dissolved Mn(II) (Fig. 3) (Jensen et al, 2002;Luo and Millero, 2003). Overall, when comparing to Fig.…”

Section: Oxidative Dissolution Of Rhodochrosite By P Putida Mnb1mentioning

confidence: 73%

Section: Role Of Extracellular Polymeric Substances (Eps) From Pseudo...mentioning

confidence: 99%

Role of extracellular polymeric substances (EPS) from Pseudomonas putida strain MnB1 in dissolution of natural rhodochrosite

Wang

Pan

2014

Preprint

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“…The small quantity of Mn 2+ released in the neutral environment (pH 7.4) is possibly due to the hydrolysis of MnCO 3 at room temperature. Whereas the large amount of released Mn 2+ can be explained by the accelerated ionization of MnCO 3 in acidic conditions. , …”

Section: Resultsmentioning

confidence: 99%

Polydopamine-Coated Manganese Carbonate Nanoparticles for Amplified Magnetic Resonance Imaging-Guided Photothermal Therapy

Cheng

Zhang

Kang

et al. 2017

ACS Appl. Mater. Interfaces

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This study reports a multifunctional nanoparticle (NP) that can be used for amplified magnetic resonance image (MRI)-guided photothermal therapy (PTT) due to its surface coating with a polydopamine (PDA) shell. Importantly, by means of introducing the surface coating of PDA, large quantities of water can be trapped around the NPs allowing more efficient water exchange, leading to greatly improved MR contrast signals compared with those from NPs without the PDA coating. Further, a distinct photothermal effect can be obtained arising from the strong absorption of PDA in the near-infrared (NIR) region. By synthesizing multifunctional MnCO@PDA NPs, for example, we found that the longitudinal relaxivity (r) of MnCO NPs can improve from 5.7 to 8.3 mM s. Subsequently, in vitro MRI and PTT results verified that MnCO@PDA could serve as an excellent MRI/PTT theranostic agent. Furthermore, the MnCO@PDA NPs were applied as an MRI/PTT theranostic agent for in vivo MRI-guided photothermal ablation of tumors by intratumoral injection in 4T1 tumor-bearing mice. The MR imaging result shows a significantly bright MR image in the tumor site. The MnCO@PDA-mediated PTT result shows high therapeutic efficiency as a result of high photothermal conversion efficiency. The present strategy of amplified MRI-guided PTT based on PDA coating of NPs will be widely applicable to other multifunctional NPs.

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“…Carbonated mineral species observed in tailings, such as rhodochrosite (MnCO 3 ) and loseyite [(Mn,Zn) 7 (OH) 10 (CO 3 ) 2 ], can be dissolved by direct protonation catalyzed by biogenic H 2 SO 4 (Luo and Millero 2003). Fig.…”

Section: Resultsmentioning

confidence: 99%

EFFECT OF pH, MINING TAILINGS CONCENTRATION AND CULTURE MEDIUM ON THE PERFORMANCE OF POLYMETALLIC BIOLEACHING AT FLASK LEVEL

Zazueta-Álvarez

Medrano-Roldán

Reyes-Jáquez

et al. 2018

Rev. Int. Contam. Ambie.

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The aim of this research was to evaluate bioleaching of Mn, As, Pb and Zn from mining tailings using two different sets of variable processing conditions. In the first set pH (2.0, 4.0 and 6.0), tailings concentrations (10, 20 y 30 %, w/v [111.11, 250.00 and 428.57 g/L, respectively]), and two types of culture medium (9K [with nitrogen source] and nonN (nitrogen-free medium) were evaluated; in the second set the evaluation focused on continuous supplementation of biogenic H2SO4 oxidized with two types of culture medium (9K and nonN) at different tailings concentrations (10, 20 y 30 %, w/v [111.11, 250.00 and 428.57 g/L, respectively]), with continuous supplementation of the media previously described (9K and nonN) oxidized by the native strains Leptospirillum ferriphilum and Leptospirillum ferrooxidans. In the first set, the highest removal of Mn (93.49 %), As (13.92 %) and Pb (> 99 %) was observed in both media at 10 % of tailings and initial pH of 2.0. In the second experimental set, the highest removal of Mn (99 %), As (> 85 %), Pb (> 99 %) and Zn (67 %) was found with both media at 10 % of tailings and initial pH 6.0. Continuous supplementation of biologically acidified and oxidized culture media enhanced the metals removal from solid waste or tailings. Similar metals removal in media without nitrogen compared to medium with nitrogen was observed in this research.

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Cited by 14 publications

References 15 publications

Role of extracellular polymeric substances (EPS) from <i>Pseudomonas putida</i> strain MnB1 in dissolution of natural rhodochrosite

Role of extracellular polymeric substances (EPS) from <i>Pseudomonas putida</i> strain MnB1 in dissolution of natural rhodochrosite

Polydopamine-Coated Manganese Carbonate Nanoparticles for Amplified Magnetic Resonance Imaging-Guided Photothermal Therapy

EFFECT OF pH, MINING TAILINGS CONCENTRATION AND CULTURE MEDIUM ON THE PERFORMANCE OF POLYMETALLIC BIOLEACHING AT FLASK LEVEL

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Untitled

Cited by 14 publications

References 15 publications

Role of extracellular polymeric substances (EPS) from &lt;i&gt;Pseudomonas putida&lt;/i&gt; strain MnB1 in dissolution of natural rhodochrosite

Role of extracellular polymeric substances (EPS) from &lt;i&gt;Pseudomonas putida&lt;/i&gt; strain MnB1 in dissolution of natural rhodochrosite

Polydopamine-Coated Manganese Carbonate Nanoparticles for Amplified Magnetic Resonance Imaging-Guided Photothermal Therapy

EFFECT OF pH, MINING TAILINGS CONCENTRATION AND CULTURE MEDIUM ON THE PERFORMANCE OF POLYMETALLIC BIOLEACHING AT FLASK LEVEL

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Role of extracellular polymeric substances (EPS) from <i>Pseudomonas putida</i> strain MnB1 in dissolution of natural rhodochrosite

Role of extracellular polymeric substances (EPS) from <i>Pseudomonas putida</i> strain MnB1 in dissolution of natural rhodochrosite