Risk assessment of soil contamination with heavy metals from sewage sludge and ash after its incineration

2020 ◽  
Vol 199 ◽  
pp. 297-306 ◽  
Author(s):  
Jolanta Latosińska
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Sewage Sludge ◽  
Soil Contamination

scholarly journals The Ecological Risk Assessment and the Chemical Speciation of Heavy Metals in Ash after the Incineration of Municipal Sewage Sludge

2020 ◽  
Vol 12 (16) ◽  
pp. 6517 ◽  
Author(s):  
Jolanta Latosińska ◽  
Przemysław Czapik
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Sewage Sludge ◽  
Soil Contamination ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Risk Index ◽  
Soil Environment ◽  
Sewage Sludge Ash ◽  
Sludge Ash

Popular incineration of sewage sludge results in the increase in heavy metals content in ash. The knowledge of the total content of heavy metals in sewage sludge ash does not demonstrate a potential hazard. The toxicity of heavy metals in great measure depends on the form of their occurrence. The prevailing norms do not require the ecological risk assessment of the environmental burden with heavy metals for the choice of the method of the utilization of sewage sludge ash. The paper presents the research results on the mobility of heavy metals in sewage sludge ash after its incineration. The geo-accumulation index (IGAI), the potential ecological risk index (PERI) and the risk assessment code (RAC) were used for the evaluation of the potential soil contamination with heavy metals. The authors also suggested a new formula, which took into consideration more factors influencing the risk of the contamination of a water-soil environment with heavy metals—the water and soil environment risk index (WSERI). The calculated indices for sewage sludge ash indicate the risk of soil contamination with heavy metals.

Migration and risk assessment of heavy metals in sewage sludge during hydrothermal treatment combined with pyrolysis

2016 ◽  
Vol 221 ◽  
pp. 560-567 ◽  
Author(s):  
Xingdong Wang ◽  
Chunxing Li ◽  
Bin Zhang ◽  
Jingjiang Lin ◽  
Qiaoqiao Chi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Sewage Sludge ◽  
Hydrothermal Treatment

scholarly journals Identification of the Chemical Forms of Heavy Metals in Municipal Sewage Sludge as a Critical Element of Ecological Risk Assessment in Terms of Its Agricultural or Natural Use

2020 ◽  
Vol 17 (13) ◽  
pp. 4640 ◽  
Author(s):  
Malwina Tytła
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Sewage Sludge ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Municipal Wastewater ◽  
Risk Index ◽  
Municipal Sewage Sludge ◽  
Critical Element ◽  
Chemical Forms

The present study aimed to demonstrate that identification of the chemical forms of heavy metals in sewage sludge produced in municipal Wastewater Treatment Plants (WWTPs) is a critical element of ecological risk assessment, especially in terms of its agricultural or natural use. The concentrations of seven heavy metals (Cd, Cr, Cu, Ni, Pb, Zn and Hg) were determined using inductively coupled plasma optical spectrometry (ICP-OES) and cold vapor atomic absorption spectrometry (CV-AAS). The chemical forms of heavy metals were analyzed in accordance with the sequential extraction method proposed by the Community Bureau of Reference (BCR). Sludge samples were collected at the five municipal WWTPs located in the largest industrial area in the country, i.e., the Upper Silesian Industrial Region (southern Poland, central Europe). The ecological risk was assessed by calculating the Potential Ecological Risk Factor (ER), Risk Index (RI), Risk Assessment Code (RAC), Individual Contamination Factor (ICF), Global Risk Index (GRI) as well as the author’s indices, i.e., Individual Ecological Risk (IER) and Global Ecological Risk (GER). To demonstrate the differences between the level of ecological risk posed by the different heavy metals, sludge samples were collected at two specific points of the processing line. Considering the chemical forms of heavy metals, the highest ecological risk was posed by Zn, Cd and Ni, while in the case of their total concentrations, by Cd and Hg. The obtained results confirm that quantitative determination of the total content of heavy metals in sewage sludge is not a sufficient criterion in assessment of the ecological risk that these elements pose to the natural environment and living organisms. Moreover, multivariate statistical analysis revealed a significant correlation between the concentrations of heavy metals, which indicates that they plausibly originate from the same source of pollution.

scholarly journals Influence of Temperature on Characteristics of Particulate Matter and Ecological Risk Assessment of Heavy Metals during Sewage Sludge Pyrolysis

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5838
Author(s):  
Binbin Li ◽  
Haihong Fan ◽  
Songxiong Ding ◽  
Yixuan Luan ◽  
Yiming Sun
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Particulate Matter ◽  
Sewage Sludge ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Pyrolysis Temperature ◽  
Inorganic Particles ◽  
Different Temperatures ◽  
Influence Of Temperature On

The formation process of Particulate Matter (PM) during sludge pyrolysis at different temperatures (300–700 °C) and the ecological risks of heavy metals were studied. The results showed that the particulate matter is mainly condensed on the quartz film in a carbon-based organic matter when the pyrolysis temperature was between 200–500 °C in a volatilization process. Inorganic particles was found in the particulate matter when the temperature was raised to 500–700 °C in a decomposition stage. Heavy metals were enriched in particulate matter with increase in pyrolysis temperature. When the temperature reached 700 °C, the concentration of Pb and Cd in the particulate matter significantly increased. The ecological risk assessment showed that heavy metals in the sewage sludge had considerable ecological toxicity. When the pyrolysis temperature reached 700 °C, the ecological toxicity of those heavy metals enriched in the particulate matter decreased considerably.

Co-liquefaction of sewage sludge and oil-tea-cake in supercritical methanol: yield of bio-oil, immobilization and risk assessment of heavy metals

2015 ◽  
Vol 36 (21) ◽  
pp. 2770-2777 ◽  
Author(s):  
Yunbo Zhai ◽  
Zhong Chen ◽  
Hongmei Chen ◽  
Bibo Xu ◽  
Ping Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Sewage Sludge ◽  
Supercritical Methanol ◽  
Bio Oil
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