The influence of functional groups on the pyrolysis of per
Observed hydrogen-substituted products indicate that functional groups with higher hydrocarbon character may lead to more H-abstraction terminated products. Overall findings show that the functional group of a PFAS may decrease or increase its thermal stability and lead to different profiles of pyrolysis products. Graphical Abstract. Download ...
Effect of different pyrolysis temperatures on physico …
Effect of different pyrolysis temperatures on physico-chemical characteristics and lead ... Biochar is a carbon-rich product produced by the pyrolysis of various waste materials including wood, poultry litter, and crop residues. 10–13 Biochar possesses a …
Role of Pyrolysis Temperature on Arsenic and Lead …
In this study, we investigated the impact of biochar, produced at diferent temperatures, on the behavior of arsenic (As) and lead (Pb) in leached sediments. Before leaching, we combined …
Influence of pyrolysis temperature on lead immobilization by …
Batch sorption experiments were carried out to determine the sorption capacity of the biochars for lead (Pb) in aqueous solutions. Results showed that the cation exchange …
Pyrolysis: A Sustainable Way to Generate Energy from Waste
Pyrolysis of woody biomass to obtain pyroliginous acid was started hundreds of years ago, which has versatile applications. ... Bricka M, Smith F, Yancey B, Mohammad J. Sorption of arsenic, cadmium, and lead by chars produced from fast pyrolysis of wood and bark during bio‐oil production. Journal of Colloid and Interface Science. 2007; 310:57 ...
Journal of Analytical and Applied Pyrolysis
Herein, volatile heavy metals in MSW are mainly lead and cadmium (Pb and Cd) pollutants, originating from lead-acid batteries, nickel-cadmium batteries, ... Pyrolysis is generally carried out under anoxic conditions, the forms of Pb and Cd pollutants in the gas phase are mainly elemental and chloride, i.e., Pb 0, ...
Effect of pyrolysis condition on the adsorption mechanism of lead
The change of crystal structure confirmed that precipitation was the main mechanism of lead adsorption and that the tobacco stem biochar obtained at 700 °C for around 2 h was excellent adsorbent for lead clearance, since high temperature pyrolysis could promote the formation of carbonates but they would be decomposed under long-time exposure.
Research progress on heat effects of coal pyrolysis process
The calculation of pyrolysis heat consumption in the coal coking process is based on a fixed empirical formula and the empirical value of heat consumption relies on the size of the coke oven [9]. However, changes in coal types and pyrolysis conditions can lead to variations in the pyrolysis reaction.
Influence of pyrolysis temperature on the cadmium and lead …
The pyrolysis temperature significantly affected the properties of the OSB. ... The maximum adsorption potential was noted as 190.7 mg g−1 for biochar produced at 600 °C (Lian et al., 2021). Lead abatement using the oak bark, oak wood, pine bark and pine wood wastes (four different biochars) sent out from bio-oil production proved to be good ...
Techno-economic evaluation of the integrated biosorption–pyrolysis …
1. Introduction. Due to its severe toxicity and great potential hazard to the environment and organisms, lead (Pb) is regarded as one of "the big three" of the heavy metals (others are cadmium and mercury) (Volesky, 1990, Hamidpour et al., 2010).The major sources of Pb released into the environment are industrial activities such as electroplating, battery …
Determination of the Thermodynamic Parameters of the Pyrolysis …
The pyrolysis process allows the anaerobic thermochemical decomposition of plastic waste at high temperature with or without the presence of a catalyst to obtain biofuels, ... In the case of PE, it is easier at high heating rates, as moving to the area of higher energy would lead to greater bond breakage, as it is a linear structure . 4 ...
Effects of pH and Pyrolysis Temperature on Adsorption …
Elevated level of lead (Pb) in water is a health concern that can cause reproductive and immunological defects. Pyrolyzed carbon-rich material (biochar) has been reported to be …
Behavior of chromium, nickel, copper, zinc, cadmium, mercury, and lead
Behavior of chromium, nickel, copper, zinc, cadmium, mercury, and lead during the pyrolysis of sewage sludge
Pyrolysis of Plants After Phytoremediation of Contaminated …
The aim of this study was to remediate lead (Pb), cadmium (Cd) and zinc (Zn) from contaminated soil and stabilize to pyrolysis solid product. To accomplish this, phytoremediation of soil contaminated with Pb, Cd and Zn by different plants (sunflower, corn and rape) was performed with and without ethylenediaminetetraacetic acid (EDTA).
Exploring the potential of clay catalysts in catalytic pyrolysis …
The pyrolysis of mixed plastics was more complex than that of single plastics due to the interaction of pyrolysis intermediates of different types of plastics, which may lead to lower oil yields depending on the specific mixed plastic components. Pyrolysis of mixed plastics also has its advantages. For example, hydrogen-rich plastics such as PE ...
Effect of pyrolysis condition on the adsorption mechanism of …
Tobacco stem biochar was prepared to investigate the relationship between the adsorption mechanisms of lead, cadmium and copper and the pyrolysis conditions. It is …
Volatile-char interactions during biomass pyrolysis: Effects …
Furthermore, the secondary pyrolysis of LG can also lead to the generation of FF and FCM [23]. The presence of CNT can also promote the cleavage reaction of the glucose ring, as evidenced by the increase in the relative abundance of MG and HAA from 3.61 % and 3.59 % to 9.67 % and 5.62 %, respectively (Fig. 1 d).
Research on the occurrence modes and pyrolysis release …
Lead exists in the form of PbS (s) before 500°C, and gradually transforms into PbS (g) and Pb (g) with the increase of temperature. To study the behavior of arsenic (As) and lead …
Unlocking the dehalogenation potential of lead oxide (PbO) …
Herein, a multitude of characterization studies are done to probe into the debromination efficiency of lead oxide (PbO) during its co-pyrolysis with TBBPA-DAE via products (char, gas and condensates) analyses. The thermogravimetric analysis suggested a pyrolytic run up to 600 °C. The GCMS analysis showed that the release of brominated ...
One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar …
One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance. ... The lead removal efficiency increased from 34.1 to 71.8 % as the biochar dose increased, whereas the adsorption efficiency (q t) decreased from 66.82 to 24.23 mg·g –1. The increase in lead removal percentage can be attributed ...
Behavior of chromium, nickel, copper, zinc, cadmium, mercury, and lead
For sewage sludge, which contains metals with similar chemical and physical properties such as Cr, Ni, Cu, Zn, Cd, and Pb, pyrolysis at 500-600/sup 0/C might prove suitable since no metals are released to the atmosphere and a char is produced that is well suited for disposal in an inorganic sanitary landfill. Raw and digested sewage sludge samples were pyrolyzed in order to …
Pyrolysis of Plants After Phytoremediation of Contaminated …
The aim of this study was to remediate lead (Pb), cadmium (Cd) and zinc (Zn) from contaminated soil and stabilize to pyrolysis solid product. To accomplish this, phytoremediation of soil contaminated with Pb, Cd and Zn by different plants (sunflower, corn and rape) was performed with and without ethylenediaminetetraacetic acid (EDTA). According to …
Influence of pyrolysis temperature on lead immobilization …
Introduction. Biochar is a carbon (C)-rich material produced by thermal decomposition of biomass in an oxygen-limited environment (Al-Wabel et al. 2013).Biochar typically has a high sorption capacity for contaminants, and on a long-term basis, it may also sequester C (Zhang et al. 2014; Dong et al. 2015).Due to its large specific surface area (SSA), a variety of surface functional …
Sustainable Diesel from Pyrolysis of Unsaturated Fatty Acid …
The pyrolysis of mixed metal basic soap produced a hydrocarbon-like mixture containing a carbon chain length between C 7 and C 20. The graph of the pyrolysis liquid product component (Figure 3) shows that liquid products of basic soap pyrolysis contain n-alkane, iso-alkane, and 1-alkene, while the most dominant component is iso alkane. This ...
Analytical pyrolysis of biomass using pyrolysis-gas …
Analytical pyrolysis is currently showing tremendous potential for investigating biomass conversion into chemicals and biofuels, of which the most notable is the pyrolyzer coupled with the gas chromatography/mass spectrometry (Py-GC/MS) technique. ... For example, the sensitivity and limit of detection of GC/MS can lead to accuracy issues when ...
A comprehensive review of the pyrolysis process: from …
Thermally induced chemical decomposition of organic materials in the absence of oxygen is defined as pyrolysis. This process has four major application areas: (i) production of carbon materials ...
Phosphorus-rich biochar produced through bean-worm skin waste pyrolysis
Phosphorus-rich biochar produced through bean-worm skin waste pyrolysis enhances the adsorption of aqueous lead ... Pyrolysis was proved to be an effective approach in improving the adsorption performance of BWS toward Pb(II). In comparison with BWS, the good buffering ability of BWS-BC due to the higher pH value of the later adsorbent than the ...
Biomass pyrolysis: A review of the process development and …
Pyrolysis can be operated at atmospheric pressure. Hence, the conversion of biomass into a liquid fuel via pyrolysis has attracted great interest. Pyrolysis of biomass is categorised to slow and fast pyrolysis, according to the heating rate during pyrolysis. ... It is mainly composed of oxygenated compounds, which lead to the high thermal ...
Synergistic effects of Co-pyrolysis on the immobilization …
Synergistic effects of Co-pyrolysis on the immobilization and transformation of lead (Pb), chromium (Cr), nickel (Ni), and fluorine (F) in phosphogypsum-biomass mixtures ... (CS), cellulose (C), lignin (L), glucose (G). Co-pyrolysis occurred at varying temperatures (600 °C, 700 °C, 800 °C, and 900 °C) and different addition ratios (10%, 15% ...
Co-pyrolysis of alkali-fused fly ash and corn stover to …
Co-pyrolysis of alkali-fused fly ash and corn stover to synthesize biochar composites for remediating lead-contaminated soil ... 10:2, and 10:5 (AB500-1, AB500-2, and AB500-5), was used to remediate lead (Pb)-contaminated soil. Compared with pristine biochars (BCs), ABs were enriched with oxygen-containing functional groups (Si-O-Si and Si-O ...