Effects of sulfur on lead partitioning during sludge incineration based on experiments and thermodynamic calculations

Liu, Jingyong; Huang, Shu-jie; Sun, Shuiyu; Ning, Xun‐an; He, Ruizhe; Li, Xiaoming; Chen, Tao; Luo, Guangqian; Xie, Wei; Wang, Yujie; Zhuo, Zhongxu; Fu, Jiewen

doi:10.1016/j.wasman.2014.11.021

Cited by 32 publications

(4 citation statements)

References 35 publications

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“…Previous research showed that retention of heavy metals in SSA is related to high contents of Si, Al and Ca. In this case, heavy metals are likely to be incorporated into silicates and aluminates impeding their volatilization [35,[40][41][42][43][44][45][46]. Pb is the only heavy metal for which the concentration in the SSA decreased at temperatures above 900 °C (see Table 1), which might be related to Pb volatilization [35,41,46,47].…”

Section: Ssa Characterizationmentioning

confidence: 99%

Recovery of phosphorus from sewage sludge ash: Influence of incineration temperature on ash mineralogy and related phosphorus and heavy metal extraction

Luyckx

Caneghem

2021

Journal of Environmental Chemical Engineering

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Section: Ssa Characterizationmentioning

confidence: 99%

Recovery of phosphorus from sewage sludge ash: Influence of incineration temperature on ash mineralogy and related phosphorus and heavy metal extraction

Luyckx

Caneghem

2021

Journal of Environmental Chemical Engineering

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“…Today, large amounts of lead-containing wastes are produced in non-ferrous metallurgical industry [1][2][3], especially in Pb and Zn metallurgy fields, such as lead ash and lead slag generated in Pb/Zn smelting, lead anode slime, and lead sludge produced in the electrolytic refining. Other engineering fields [4][5][6] are also sources of Pb-bearing substances, including lead scrap and lead paste separated from spent lead-acid batteries [7]. In many countries, these lead-bearing wastes are classified as hazardous waste due to the high toxicity of lead [8].…”

Section: Introductionmentioning

confidence: 99%

“…4 system. It shows that the melting temperature of Na 2 CO 3 -Na 2 SO 4 mixture decreases with increasing Na 2 CO 3 fraction, and reaches the minimum in W Na 2 CO 3 /W Na 2 SO 4 = 0.54/0.45.…”

mentioning

confidence: 99%

Cleaner Extraction of Lead from Complex Lead-Containing Wastes by Reductive Sulfur-Fixing Smelting with Low SO2 Emission

Yang

Lin

et al. 2019

Minerals

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A novel and cleaner process for lead and silver recycling from multiple lead-containing wastes, e.g., lead ash, lead sludge, lead slag, and ferric sludge, by reductive sulfur-fixing smelting was proposed. In this process, coke and iron-containing wastes were employed as reductive agent and sulfur-fixing agent, respectively. A Na2CO3-Na2SO4 mixture was added as flux. The feasibility of this process was detected from thermodynamic and experimental perspectives. The influence of Fe/SiO2 and CaO/SiO2, composition of the molten salt, coke addition, smelting temperature, and smelting time on direct Pb recovery and sulfur-fixation efficiency were investigated. The optimal process conditions were determined as follows: WCoke = 15% WPb wastes, W Na 2 CO 3 / W Na 2 SO 4 = 0.7/0.3, Fe/SiO2 = 1.10, CaO/SiO2 = 0.30, smelting temperature 1200 °C, and smelting time 2 h, where W represents weight. Under these optimum conditions, 92.4% Pb and 98.8% Ag were directly recovered in crude lead bullion in one step treatment, and total 98.6% sulfur was fixed. The generation and emissions of SO2 can be avoided. The main phases in ferrous matte obtained were FeS, NaFeS2, Fe2Zn3S5, and a little entrained Pb. The slag was a FeO-SiO2-CaO-Na2O quaternary melt.

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“…For example, “Treatment and Pollution Control Technology Policy for Sludge in Municipal Wastewater Treatment Plant” adopted by the Ministry of Environmental Protection of China incentivizes the use of sludge as a fuel in co‐incineration by thermal power plants, and cement and brick kilns. However, the complexity and variability of fuel components (e.g., sludge, coals, and municipal solid waste—MSW) in co‐incineration have led to the emissions of pollutants with strong toxicity such as heavy metals (HMs), organic pollutants, and acid gases (Li, Zhang, Shao, & He, ; Li et al., ; Liu, Fu, et al., ; Yu et al., ) whose migration, transformation, and emission patterns have drawn worldwide attention (Han, Hwang, Kim, Park, & Kim, ; Liu, Huang, et al, ; Liu, Huang, Sun, & Xie, ; Liu, Zeng, et al., ).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic equilibrium predictions of zinc volatilization, migration, and transformation during sludge co‐incineration

Liu

Cai

et al. 2019

Water Environment Research

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The effects of interactions between and among chlorine (Cl), sulfur (S), phosphorus (P), and minerals on migration, transformation, and volatilization of zinc (Zn) were numerically simulated in sludge co-incineration using the chemical thermodynamic equilibrium method. Our results showed that all the minerals of Fe 2 O 3 , Al 2 O 3 , Fe 2 O 3 , and TiO 2 except for CaO in the sludge co-incineration system reacted with Zn which inhibited the Zn volatilization. The presence of S and P was beneficial to the formation of ZnSO 4 (s) and Zn 3 (PO 4 ) 2 (s). Cl weakened the chemical reactions between the minerals and Zn, thus increasing the Zn volatilization. Changes in Zn transformation and migration induced by the coupling of Cl + S were mainly controlled by Cl, S, and the minerals, while those induced by Cl + P and S + P were mainly controlled by P and S + P. The presence of P + Cl, S + Cl, S + P, S + Cl + P, Cl, and Al 2 O 3 in the coexisting mineral system controlled the reactions between the minerals and Zn.

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Effects of sulfur on lead partitioning during sludge incineration based on experiments and thermodynamic calculations

Cited by 32 publications

References 35 publications

Recovery of phosphorus from sewage sludge ash: Influence of incineration temperature on ash mineralogy and related phosphorus and heavy metal extraction

Recovery of phosphorus from sewage sludge ash: Influence of incineration temperature on ash mineralogy and related phosphorus and heavy metal extraction

Cleaner Extraction of Lead from Complex Lead-Containing Wastes by Reductive Sulfur-Fixing Smelting with Low SO2 Emission

Thermodynamic equilibrium predictions of zinc volatilization, migration, and transformation during sludge co‐incineration

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