| Title |
Reduction of selenite to elemental selenium nanoparticles by activated sludge
|
|---|---|
| Published in |
Environmental Science and Pollution Research, September 2015
|
| DOI | 10.1007/s11356-015-5138-7 |
| Pubmed ID | |
| Authors |
Rohan Jain, Silvio Matassa, Satyendra Singh, Eric D. van Hullebusch, Giovanni Esposito, Piet N. L. Lens |
| Abstract |
Total selenium removal by the activated sludge process, where selenite is reduced to colloidal elemental selenium nanoparticles (BioSeNPs) that remain entrapped in the activated sludge flocs, was studied. Total selenium removal efficiencies with glucose as electron donor (2.0 g chemical oxygen demand (COD) L(-1)) at neutral pH and 30 °C gave 2.9 and 6.8 times higher removal efficiencies as compared to the electron donors lactate and acetate, respectively. Total selenium removal efficiencies of 79 (±3) and 86 (±1) % were achieved in shake flasks and fed batch reactors, respectively, at dissolved oxygen (DO) concentrations above 4.0 mg L(-1) and 30 °C when fed with 172 mg L(-1) (1 mM) Na2SeO3 and 2.0 g L(-1) COD of glucose. Continuously operated reactors operating at neutral pH, 30 °C and a DO >3 mg L(-1) removed 33.98 and 36.65 mg of total selenium per gram of total suspended solids (TSS) at TSS concentrations of 1.3 and 3.0 g L(-1), respectively. However, selenite toxicity to the activated sludge led to failure of a continuously operating activated sludge reactor at the applied loading rates. This suggests that a higher hydraulic retention time (HRT) or different reactor configurations need to be applied for selenium-removing activated sludge processes. Graphical Abstract Scheme representing the possible mechanisms of selenite reduction at high and low DO levels in the activated sludge process. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| France | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 57 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 57 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 14 | 25% |
| Researcher | 11 | 19% |
| Student > Master | 9 | 16% |
| Other | 4 | 7% |
| Professor | 2 | 4% |
| Other | 8 | 14% |
| Unknown | 9 | 16% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 19 | 33% |
| Agricultural and Biological Sciences | 7 | 12% |
| Biochemistry, Genetics and Molecular Biology | 6 | 11% |
| Engineering | 4 | 7% |
| Chemistry | 3 | 5% |
| Other | 4 | 7% |
| Unknown | 14 | 25% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 12 September 2015.
All research outputs
#19,440,618
of 23,911,072 outputs
Outputs from Environmental Science and Pollution Research
#5,443
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Outputs of similar age
#197,255
of 270,626 outputs
Outputs of similar age from Environmental Science and Pollution Research
#83
of 178 outputs
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