Arsenic removal by goethite and jarosite in acidic conditions and its environmental implications

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

“…Guan et al [56] studied the adsorption of arsenic into hydrous ferric oxide, and the results showed a decreasing trend on adsorption of As(III) after the pH was less than 4 [58]. A similar trend was observed by [60] on As(V) removal by iron oxide and aluminum oxide and by [92] on arsenic removal by goethite and jarosite in acidic conditions. However, Maiti et al [50] showed that sulfate ion did not have any effect on As(V) and As(III) ions adsorption due to higher adsorption affinity of treated laterite surface on As(V).…”

“…This effect is usually attributed to changes in the electric potential in the interface, whereby the electrostatic repulsion between the charged surface and the anion is decreased, and the adsorption is favored [130]. The effect of ionic strength on the As(V) sorption was studied at 0.02 and 0.15 mol dm −3 NaCl solutions goethite and jarosite and the result shows that As(V) sorption is independent of ionic strength [92]. The researchers suggested that As(V) adsorption on goethite could proceed via the formation of inner-sphere surface.…”

“…The researchers suggested that As(V) adsorption on goethite could proceed via the formation of inner-sphere surface. References [92,131] studied the effects of ionic strength in magnetite nanoparticles on arsenate and arsenite adsorption, and it was reported that the adsorption decreased by 4% by increasing the ionic strength from 0.01 to 0.1. Guo et al [99] investigated the effect of background electrolyte (NaCl) concentration on synthetic siderite with 0.001-0.1 mol/L NaCl as background electrolyte.…”

Arsenic content, fractionation, and ecological risk in the surface sediments of lake

“…However, Belzile and Tessier (1990) reported that average molar ratios of As to Fe for the recent lacustrine sediments were in the range 3.80 9 10 -5 to 2.12 9 10 -2 . Synthesized Schwermannite had a maximal molar ratio of 2.0 9 10 -2 (Asta et al 2009). The maximal molar ratios of As to Fe for natural hematite, magnetite, and goethite were 2.83 9 10 -4 , 2.21 9 10 -4 , and 4.45 9 10 -4 for As (III), respectively; while they were 8.82 9 10 -4 , 2.71 9 10 -4 , and 5.34 9 10 -4 for As (V) (Giménez et al 2007).…”

Kinetic Analysis of the Decomposition of the KFe3(SO4)2-x(CrO4)x(OH)6Jarosite Solid Solution in Ca(OH)2Medium

“…Jarosite-type compounds have proved to be better adsorbents compared to other minerals in the removal of dangerous metals, such as arsenic. 16 Since different ions can be incorporated into the jarosite structure, their precipitation has been used as a method to concentrate metals in solution. Its solubility depends on the pH and, therefore, jarosite dissolution is of great importance when controlling the mobility of trace elements adhered to its structure.…”