An effective adsorbent developed from municipal solid waste and coal co-combustion ash for As(V) removal from aqueous solution

Abstract

a b s t r a c tA new adsorbent was developed from waste ash resulting from municipal solid waste and coal cocombustion power plant. The ash was firstly subjected to hydrothermal treatment for zeolite synthesis, and then modified with iron(II) ions by agitation (ISZ) or ultrasonic (UISZ) treatment. The effect of operating factors such as pH, contact time, initial As(V) concentration and adsorbent dosage was investigated and the optimum operating conditions were established. The adsorption capacity for As(V) onto UISZ and ISZ were 13.04 and 5.37 mg g −1 , respectively. The adsorption isotherm data could be well described by Langmuir isotherm model. The optimum initial pH values for As(V) removal were 2.5 and 2.5-10.0 by ISZ and UISZ, respectively. The results indicated that ultrasound treatment scattered the particles of the adsorbent uniformly, which was in favor of impregnating iron ions into pores. Leaching of hazardous elements from the used adsorbents was very low. Accordingly, it is believed that the adsorbents developed in this study are environmentally acceptable and industrially applicable for utilization in arsenic-containing wastewater treatment.

Arsenic (V) removal from aqueous system using adsorbent developed from a high iron-containing fly ash

“…7, and the adsorption capacity (q max ) obtained from the Langmuir isotherm model ( , which was much higher than that of the other adsorbents made from the ash by the way of adding iron source (e.g. 13.04 mg g − 1 ) (Fan et al, 2008), which should be ascribed to the high BET specific surface area of HIOFAA.…”

“…Moreover, Fan et al (2008) have synthesized another ironimpregnated adsorbent for arsenic removal using the MSW and coal co-combustion ash. Among the foregoing studies, chemical agents, such as FeCl 3 , FeSO 4 , were necessary for the adsorbents synthesis.…”

Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

“…Various municipal [21][22][23] and industrial [24][25][26] as well as animal manure [27][28][29] wastes have been used to produce adsorbents. Simple carbonization does not lead to an extensive surface area owing to a limited content of an organic matter and a high content of inorganic compounds, mainly in the sludges [30,31].…”

Synthesis and application of green mixed-metal oxide nano-composite materials from solid waste for dye degradation

“…from different solid wastes (Fan et al, 2008;Kargbo, 2010;Matos et al, 2011;Esparza et al, 2011;Zhuo et al, 2012). Sewage sludge-based composite materials have been used as an adsorbent for adsorbing NO 2 (Pietrzak and Bandosz, 2008).…”