Effect of different conditions on Cu(II) and Cr(VI) biosorption by dried waste tea fungal biomass

Abstract

Some industrial wastewaters contain high quantities of non-toxic salts besides heavy metal ions. The presence of salt ions leads to a high ionic strength of water, which may significantly affect the performance of the biosorption process, so that the effect of salts on the biosorption of heavy metal ions should be investigated. In this study the effect of different salts concentrations (0.1; 0.5 and 1 mol L-1) and dosage of tea fungal biomass (0.15; 0.25 and 0.5 g L-1) dried at different temperatures: 20°C, 70°C, 80°C, 105°C and 125°C on Cu(II) and Cr(VI) biosorption was studied in a batch system. Biosorption at an ionic strength of 0.1 mol L-1 of all salts investigated had a decreasing effect on Cu(II) and Cr(VI) removal. It was observed that (NH4)2SO4 at the concentrations of 0.5 mol L-1 and 1 mol L-1 was more efficient than other salts for metal ions removal. In case of Cr(VI) the most efficient removal was obtained for the water with K2SO4 at a concentration of 0.5 mol L-1. The lowest biosorbent dosage (0.15 g L-1 tea fungal biomass dried at 20°C in the case of Cu(II) biosorption and at 80°C in the case of Cr(VI) biosorption) resulted in the highest metal uptake of 38 mg g-1 in case of Cu(II) and 33 mg g-1 in case of Cr(VI)

Hexavalent Chromium Removal by <i>Litchi chinensis</i> Sonn Peel

“…Various biosorbents have been tried, which include seaweeds, moulds, yeast, bacteria, crab shells, agricultural products such modified corn stalks, (Chen et al, 2011), hazelnut shell (Cimino et al, 2000), orange waste (Perez-Marin et al, 2007) and tamarind peel (Acosta et al, 2010). It has also been reported that some of these biomass can reduce chromium (VI) to chromium (III), like tamarind peel (Acosta et al, 2010), tea fungal biomass (Razmovski and Sciban, 2007); Mesquite (Aldrich et al, 2003), Eucalyptus bark (Sarin and Pant, 2006), red roses waste biomass and Yohimbe bark (Fiol et al, 2008). The present study is undertaken with following objective: Investigate the use of Litchi chinensis Sonn peel for the biosorption of Chromium (VI) in aqueous solution.…”

Ingeniería: Innovación, ciencia y tecnología 3

“…al., 2010). It has also been reported that some of these biomasses can reduce chromium (VI) to chromium (III), like tea fungal biomass (Razmovski, and Sciban, 2007); Mesquite (Aldrich et. al., 2003), Eucalyptus bark (Sarin and Pant, 2006), red roses waste biomass , Yohimbe bark (Fiol et.…”

Removal of Hexavalent Chromium from Solutions and Contaminated Sites by Different Natural Biomasses

“…Various biosorbents have been tried, which include seaweeds, molds, yeast, bacteria, crab shells, agricultural products such modified corn stalks, [9], hazelnut shell [10], orange waste [11] and tamarind peel [12]. It has also been reported that some of these biomass can reduce chromium (VI) to chromium (III), like Litchii cinensis Sonn peel [13], tea fungal biomass [14], Mesquite [15], Eucalyptus bark [16], red rose's waste biomass [17] and Yohimbe bark [18]. The present study is undertaken with following objective: Investigate the use of different natural biomasses for the biosorption and reduction of Chromium (VI) in aqueous solution, and their elimination from contaminated sites.…”