Mo, Sb and Se Removal from Scrubber Effluent of a Waste Incinerator

Removal of Molybdate Anions from Water by Adsorption on Zeolite‐Supported Magnetite

“…The anions sulphate, phosphate and chloride were added in concentrations of 5 g/l (sulphate, phosphate) or 36 g/l (chloride) to a solution containing 1 mg/l molybdenum and 0.1 g/l adsorbent at pH 3. For sulphate and chloride, these are concentrations as appearing in the effluent of a scrubber of a municipal solid waste (MSW) incinerator (Lievens et al, 2010). Table 4 gives the residual molybdenum concentrations in solutions spiked with the interfering anions, for an adsorption time of 24 h. Without addition of any interfering anion 83% of molybdenum is removed.…”

“…To study the effect of competitive anions, different solutions at pH 3, containing 1 mg/l molybdenum and 0.1 g/l zeolitesupported magnetite were spiked with possible interfering oxyanions Sb(III), Sb(V) and As(V), and with chloride, phosphate, and sulphate. The concentrations of these competitive anions were selected according to a realistic case: the effluent of a scrubber of a municipal solid waste (MSW) incinerator (Lievens 2010).…”

“…Molybdenum is mainly used in metallurgical applications as an alloying element in the production of stainless steel or castiron alloys (Barceloux 1999), and in the production of flame retardants, pigments and catalysts for high temperature chemical processes. The molybdate ion MoO 4 2-, the most common oxyanion of molybdenum, occurs in various types of wastewaters, like wastewater from a styrene monomer plant (1000 mg/l) (Swinkels et al, 2004), scrubber effluent of a municipal solid waste incinerator (0.95 mg/l) (Lievens et al, 2010) and mining water (, 0.1 to 2.2 mg/l) (Dessouki et al, 2005;Panayotova and Panayotov, 2004;Rojas and Vandecasteele, 2007). Traditional industrial wastewater treatment plants remove cations (e.g.…”

“…Cu 2þ , Zn 2þ ) by precipitation as their hydroxides. However, this process does not remove oxyanions, so that they may still be present in the effluent (Lievens et al 2010). Near industrial sources, such as molybdenum mining areas, the molybdenum concentration in surface water may reach concentrations of 200 to 400 lg/l and in groundwater 25 mg/l (Barceloux, 1999).…”

Synthesis of MgFe Layered Double Hydroxide from Iron-Containing Acidic Residual Solution and Its Adsorption Performance

“…In order to determine the efficiency of using the acidic residual solution as an iron precursor in the process of obtaining Mg/Fe-LDH, the LDH was analyzed and used as an adsorbent material in the removal process of Mo(VI) as molybdate (MO 4 2− ) from aqueous solutions. Due to the extensive use of Mo(VI) in many practices, molybdate anions (MO 4 2-), the most common oxyanions of Mo(VI), can be found in various waste waters, such as mining waters, scrubber effluent of municipal solid waste incinerators, waste waters from the production of stainless-steel or cast iron alloys, and waste water from the production of various pigments and catalysts for high-temperature chemical processes [29][30][31]. If molybdenum is present in drinking water at a level higher than 0.07 mg/L, which is the maximum value admitted by the World Health Organization (WHO) [32], it could be toxic to animals and humans [33].…”