Effect of energy source and leaching method on bio-leaching of rock phosphates by Acidithiobacillus ferrooxidans

Li, Lingling; Lv, Ziquan; Zuo, Zhenyu; Yang, Zhangqi; Yuan, Xiangli

doi:10.1016/j.hydromet.2016.06.018

Cited by 19 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The solid content range was assigned according to the results of the adaptation process. The pH range and the maximum amount of ferrous sulfate and elemental sulfur were selected based on the literature [26]. Tables 1 and 2 show the levels and the values of the variables for 28 experiments, respectively.…”

Section: Design Of Experimentsmentioning

confidence: 99%

“…Higher concentrations of elemental sulfur increased bacterial growth, and thus, increased production of biogenic sulfuric acid as an oxidant agent (according to Eq. ( 2)) [26]. In fact, an increase in initial elemental sulfur content in the system made more sulfur surfaces available for bacterial adsorption through an increase of the van der Waals force, which increased subsequent oxidation and metal recovery [28].…”

Section: Indium Recoverymentioning

confidence: 99%

See 1 more Smart Citation

Bioleaching of critical metals from waste OLED touch screens using adapted acidophilic bacteria

Pourhossein

Rezaei

Mousavi

et al. 2021

J Environ Health Sci Engineer

View full text Add to dashboard Cite

The mobile phone is a fast-growing E-waste stream that includes hazardous substances and valuable metals. Smartphone touch screens (SPTS) contain a considerable amount of critical metals, such as indium and strontium that can be recovered from end of life devices as a secondary resource. Bioleaching is an emerging and environmentally friendly method for metal recovery from electronic waste. In the present study, bioleaching was assessed for the extraction of indium and strontium from organic light emitting diode type smartphone touch screens. A statistical approach based on the response surface methodology was successfully applied. The effects of influential variables: pH, ferrous sulfate, elemental sulfur, and solid content and their interactions on indium and strontium recovery using adapted Acidithiobacillus ferrooxidans were evaluated. Under optimum conditions (ferrous sulfate: 13.0 g/L; solid content; 3.0 g/L; elemental sulfur: 5.6 g/L; and initial pH of 1.1), a complete indium extraction was observed, with a concentration in solution of about 200 mg/L indium. As concerns strontium, a 5% extraction efficiency was observed, which, even if quite low, resulted in a relatively high strontium concentration in solution, around 3000 mg/L, due to its high content in the solid (2%). This work opens new perspectives in the application of clean technologies for the extraction of valuable metals, such as indium and strontium from smartphone screens.

show abstract

Section: Design Of Experimentsmentioning

confidence: 99%

Section: Indium Recoverymentioning

confidence: 99%

Bioleaching of critical metals from waste OLED touch screens using adapted acidophilic bacteria

Pourhossein

Rezaei

Mousavi

et al. 2021

J Environ Health Sci Engineer

View full text Add to dashboard Cite

show abstract

“…The low dissolution rate of DCU was mainly attributed to the low solubility of PR, which served as the outer coating layer [46]. This dissolution rate is expected to be higher under wet soil conditions, given the supporting bio-leaching from soil microorganisms [47].…”

Section: Fertilizer Characterizationmentioning

confidence: 99%

Double Coating as a Novel Technology for Controlling Urea Dissolution in Soil: A Step toward Improving the Sustainability of Nitrogen Fertilization Approaches

El-Ghamry

El-Naggar²,

Elgorban

et al. 2021

Sustainability

View full text Add to dashboard Cite

This research introduces a novel technology for reducing ordinary urea (OU) dissolution by developing double-coated urea (DCU) using phosphate rock (PR) as an outer layer to reduce its hydrolysis and sodium thiosulfate (STS) as an inner layer to inhibit the urease enzyme and nitrification process. Due to the double coating, the nitrogen content of DCU was lower than that of the OU (36.7% vs. 46.5%). The ultramorphological analysis using scanning electron microscopy (SEM) indicated that the controlled coating of urea, resulting from the outer layer of PR, was due to the adhesive effect of urea formaldehyde (UF), which was used as a glue. In addition, the transmission electron microscopy (TEM) analysis of the DCU revealed its high degree of agglomeration. The mechanical hardness of DCU was higher compared to that of OU (1.38 vs. 1.08 kgf). The seven-day dissolution rate test showed that OU reached 100% dissolution on the fifth day. The rate of DCU, however, was significantly lower (32% dissolution in the seventh day). Cumulative NO3− and NH4+ losses from a clay soil sample reached 68.3% and 7.6%, respectively, with OU measuring 40.5% compared to 4.9% for DCU 70 days after application. Field experiments showed a significant improvement in the marketable yield and agronomic nitrogen efficiency (ANE) of maize grains and zucchini fruits fertilized with DCU. Furthermore, the macro and micronutrient concentrations in maize grains and zucchini fruits showed an increase in the plants fertilized with DCU. In summary, double coating can be introduced as a novel technique to control urea dissolution in soil.

show abstract

“…They found that the expression of these genes was decreased under iron-deficient and iron-excessive conditions, and the cells synthesized fewer nanoparticles. Several researchers have investigated the effect of using ferrous iron and elemental sulphur as either the sole or mixed energy sources for mineral bioleaching [38,39]. Their studies focused on the influence of bioleaching, but little is known about the influence on bacterial growth [40].…”

Section: Of 13mentioning

confidence: 99%

Effects of Single and Mixed Energy Sources on Intracellular Nanoparticles Synthesized by Acidithiobacillus ferrooxidans

Yang

Wang

et al. 2019

Minerals

View full text Add to dashboard Cite

Effective biosynthesis of magnetite nanoparticles using current technology is challenging. We investigated the synthesis of nanoparticles by Acidithiobacillus ferrooxidans grown on ferrous iron, elemental sulphur, and mixtures of both substrates. A comparison of tests with different doping amounts of elemental sulphur in ferrous-containing medium showed that the addition of 0.25 and 0.5 M elemental sulphur to the medium resulted in an increased delay of microbial growth and ferrous iron oxidation. TEM suggested that the ferrous material was an essential energy source for the synthesis of nanoparticles in cells. TEM results indicated that the different ratios of ferrous and sulphur had no significant effect on the morphology of bacteria and the size of nanoparticles. High-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDX), and X-ray absorption near edge structure (XANES) showed that the nanoparticles were composed of magnetite. For the first time, HRTEM and XANES spectra in-situ characterization was conducted to investigate the nanoparticles that were synthesized by A. ferrooxidans. The findings from this study indicated that the different ratios of ferrous and sulphur had no significant effect on size and shape of nanoparticles synthesized by A. ferrooxidans.

show abstract

Effect of energy source and leaching method on bio-leaching of rock phosphates by Acidithiobacillus ferrooxidans

Cited by 19 publications

References 29 publications

Bioleaching of critical metals from waste OLED touch screens using adapted acidophilic bacteria

Bioleaching of critical metals from waste OLED touch screens using adapted acidophilic bacteria

Double Coating as a Novel Technology for Controlling Urea Dissolution in Soil: A Step toward Improving the Sustainability of Nitrogen Fertilization Approaches

Effects of Single and Mixed Energy Sources on Intracellular Nanoparticles Synthesized by Acidithiobacillus ferrooxidans

Contact Info

Product

Resources

About