Arsenic(III) Removal at Low Concentrations by Biosorption using Phanerochaete chrysosporium Pellets

作者：Pakshirajan Kannan^*; Izquierdo Marta; Lens Piet N L

来源：Separation Science and Technology, 2013, 48(7): 1111-1122.

DOI：10.1080/01496395.2012.723102

• ANOVA
• As(III) removal
• biosorption
• interfering ions effect
• Phanerochaete chrysosporium pellets
• statistical design of experiments

As(III) removal from dilute aqueous solutions by biosorption onto pellets of the white rot fungus Phanerochaete chrysosporium was investigated. The As(III) uptake capacity was evaluated at low initial concentrations (0.21mg/L) which revealed that the P. chrysosporium pellets were only slightly less efficient than the well studied adsorbent granular ferric hydroxide. Moreover, its performance was much more superior compared to anaerobic granular sludge, another cheaply available bacterial biosorbent. In the studied pH (59) and biomass concentration (0.251.5g/L wet weight basis) ranges, no large differences in As(III) removal efficiency were observed. The influence of different ions, commonly present in groundwater, such as nitrate, fluoride, chloride, and Fe(III) on As(III) removal by the fungus was also examined by performing experiments as per the statistically valid two-level fractional factorial design of experiments. This showed a very good removal of only As(III) and Fe(III) (maximum 100%), the removal of the other ions in the mixture was very poor with the least well adsorbed being fluoride. A desorption efficiency exceeding 95% of the bound As(III) from the fungal biomass was achieved using sodium hydroxide (0.050.1M) as desorbent.

• 出版日期2013-3-1