Speciation transformation of arsenic during municipal solid waste incineration

Findings of proper temperatures for arsenic capture by CaO in the simulated flue gas with and without SO2

“…Zhao et al [18] found that through the addition of calcium based sorbent, arsenic was enriched in larger ash particles through the formation of calcium arsenates (As 5+ ). In our previous study, the capacity of calcium compounds for arsenic capture was further confirmed during municipal solid waste incineration [19]. Moreover, calcium in various forms shows different capacity for arsenic capture.…”

“…Under [21,22]. It is speculated that the decomposition of the low-temperatureformed arsenates and the desorption of the physically adsorbed arsenic promoted the re-release of the captured arsenic [19,27]. As a result, less arsenic was captured at 1173 and 1323 K.…”

PAHs and potentially toxic elements in the fly ash and bed ash of biomass fired power plants

“…Miller et al [54] found that the levels of arsenic in the straw and wood-bark samples were too low to allow clear cut comparisons. Different fractions of As is formed in the ash depending upon the interactions between arsenic vapors and inorganic compounds [55]. Exchangeable As observed especially at BP-1 and 4 is probably due to the physical adsorption of As (g) in the flue gas at low temperatures [56].…”

Enhancing SO2 Removal Efficiency By Lime Modified With Sewage Sludge In A Novel Integrated Desulfurization Process

“…Sewage sludge is a solid waste, which has high concentration of Na, K, Si, Al, Ca, Fe and Mn [21][22][23][24]. Especially, the annual production of sewage sludge in China is about 40 million t, and the disposal of untreated sewage sludge is prohibited.…”