Evaluating and Refining Alkalinity Calculations Due to Sulfide and Bicarbonate Accessed by Titration in Anaerobic Sulfate-Reducing Bioreactors

Evaluating and Refining Alkalinity Calculations Due to Sulfide and Bicarbonate Accessed by... An anaerobic down-flow fixed-structured bed reactor (DFSBR) treating synthetic acid mine drainage (AMD) presented significant drops in alkalinity (from 2.45 to 1.30 g CaCO3 L−1) simultaneously with sulfide (HS−) precipitation induced by iron addition. To clarify this observation, the theoretical speciation of sulfide in aqueous solution was used to estimate the contribution of HS− for the global alkalinity of the system. Standard solutions of bicarbonate (HCO3 −) and sulfide (HS−) were used to validate the proposed calculations for sulfide and bicarbonate alkalinities. The extent of buffer capacity of sulfide alkalinity under an overload of VFA was also evaluated. An overall assessment of the data obtained from the DFSBR showed that a concentration of total dissolved sulfide (TDS) close to 430 mg L−1 at pH = 8.48 (424 mg HS− L−1) provided an effluent alkalinity of 642 mg CaCO3 L−1 exclusively due to HS−. Therefore, the refined calculations, presented and discussed in this paper, can be considered suitable to differentiate the fractions of alkalinity due to HS− and HCO3 − obtained by titration. This novel approach provides a better characterization of the buffer capacity in anaerobic systems, mainly in order to avoid an overestimation of the HCO3 − produced by the sulfate-reducing bacteria (SRB) metabolism and to predict the potential alkalinity loss by sulfide removal. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Water, Air, Soil Pollution Springer Journals

Evaluating and Refining Alkalinity Calculations Due to Sulfide and Bicarbonate Accessed by Titration in Anaerobic Sulfate-Reducing Bioreactors

Loading next page...
 
/lp/springer_journal/evaluating-and-refining-alkalinity-calculations-due-to-sulfide-and-nClOER3Mxx
Publisher
Springer International Publishing
Copyright
Copyright © 2017 by Springer International Publishing AG
Subject
Environment; Environment, general; Water Quality/Water Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Soil Science & Conservation; Hydrogeology; Climate Change/Climate Change Impacts
ISSN
0049-6979
eISSN
1573-2932
D.O.I.
10.1007/s11270-017-3518-y
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial