Next Article in Journal
Removal of Hardness from Water Samples by a Carbonation Process with a Closed Pressure Reactor
Next Article in Special Issue
Activated Carbon, Biochar and Charcoal: Linkages and Synergies across Pyrogenic Carbon’s ABCs
Previous Article in Journal
High-Resolution Discharge Forecasting for Snowmelt and Rainfall Mixed Events
Open AccessArticle

Assessment of the Binding of Protons, Al and Fe to Biochar at Different pH Values and Soluble Metal Concentrations

1
Acid Sulfate Soils Centre, The University of Adelaide, Adelaide, SA 5005, Australia
2
School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5005, Australia
*
Author to whom correspondence should be addressed.
Water 2018, 10(1), 55; https://doi.org/10.3390/w10010055
Received: 12 December 2017 / Revised: 3 January 2018 / Accepted: 7 January 2018 / Published: 10 January 2018
(This article belongs to the Special Issue Biochar Based Soil Water Treatment)
Biochar can retain large amounts of protons and metals in the drainage water from acid sulfate soils and mine sites. Metal sorption can, however, be influenced by many factors, such as pH and metal composition. This study investigated proton, Al, and Fe retention capacity of eucalyptus biochar (1% w/v) at different pH and metal concentrations. In the absence of metals, the biochar had a high proton binding capacity, (up to 0.035 mmol of H+), whereas its capacity to retain hydroxide ions was limited. A batch experiment was carried out at pH 4 and pH 7 with 10−6, 10−5, 10−4, 10−3, and 10−2 M of added Fe or Al. Added metals precipitated considerably prior to addition of the biochar except that Al remained highly soluble at pH 4. The biochar had a high retention capacity for Al and Fe; at high (>1 mM) concentrations, over 80% of soluble metals were retained. Metal competition for binding sites of both Al and Fe at different ratios was investigated, but increasing concentrations of one metal did not reduce retention of the other. The results confirmed that biochar has high metal binding capacity under both acidic and neutral conditions. View Full-Text
Keywords: biochar; acid sulfate soil; proton; metal binding biochar; acid sulfate soil; proton; metal binding
Show Figures

Figure 1

MDPI and ACS Style

Dang, T.; Marschner, P.; Fitzpatrick, R.; Mosley, L.M. Assessment of the Binding of Protons, Al and Fe to Biochar at Different pH Values and Soluble Metal Concentrations. Water 2018, 10, 55. https://doi.org/10.3390/w10010055

AMA Style

Dang T, Marschner P, Fitzpatrick R, Mosley LM. Assessment of the Binding of Protons, Al and Fe to Biochar at Different pH Values and Soluble Metal Concentrations. Water. 2018; 10(1):55. https://doi.org/10.3390/w10010055

Chicago/Turabian Style

Dang, Tan; Marschner, Petra; Fitzpatrick, Rob; Mosley, Luke M. 2018. "Assessment of the Binding of Protons, Al and Fe to Biochar at Different pH Values and Soluble Metal Concentrations" Water 10, no. 1: 55. https://doi.org/10.3390/w10010055

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop