Production of adsorbents by pyrolysis of paper mill sludge and application on the removal of citalopram from water

Effect of pyrolysis temperature on polycyclic aromatic hydrocarbons toxicity and sorption behaviour of biochars prepared by pyrolysis of paper mill effluent treatment plant sludge

“…There is no change in the intensity of these peaks observed in the biochars pyrolyzed in the temperature range 200-500°C, however the intensity of these peaks decreased in biochars pyrolyzed in the temperature range 600-700°C. The sharp peak at 870 cm À1 is associated with carbonate stretch of calcium carbonate (CaCO 3 ) and the intensity of this peak decreased at temperatures >400°C due to the conversion of CaCO 3 into calcium oxide (CaO) (Calisto et al, 2014;Devi and Saroha, 2014a). The peaks at the 670 cm À1 , 530 cm À1 and 460 cm À1 are associated with the in-plane and out-of-plane aromatic ring deformation vibrations.…”

Application of pyrolysed agricultural biowastes as adsorbents for fish anaesthetic (MS-222) removal from water

“…Another adsorbent produced and characterized by Calisto, et al [30] based on pyrolysed primary paper mill sludge at 800 • C for 10 min (PS800-10) and a commercial activated carbon PULSORB (powder activated carbon (PAC)), provided by Chemviron Carbon were also tested.…”

Characterization and ammonia adsorption of biochar prepared from distillers' grains anaerobic digestion residue with different pyrolysis temperatures

“…The other four peaks may be assigned to the decomposition of most thermo-labile fractions of organic matter including cellulose, hemicellulose and lignin during the pyrolysis process. 22,24,28 The slow carbonization process of residual lignin led to the wide and flat DTG peak. 22 Hence, the different pyrolysis temperatures of 300, 400, 500, 600, 700, 800 ∘ C for the prepared BRC samples represented the decomposition degree of different components within the BR sample.…”

“…From BR to BRC800, the VM content decreased nearly 14 times which was much higher than the results of Calisto et al (nearly 4 times). 24 Besides, fixed carbon content increased from 33.70% (300 ∘ C) to 57.91% (600 ∘ C), and then stabilized at 58% in the pyrolysis temperature range 700 to 800 ∘ C. Calisto et al 24 found that the release of VM as well as the increase of non-volatile carbon were the two main factors responsible for carbon-rich and highly porous biochar formation, therefore a lower ratio of VM to fixed carbon was more beneficial for NH 4 + adsorption. The pH of BRC samples increased with temperature increase due to the carbonization of BR which resulted in separation of the minerals from the organic matrix, and subsequently enhanced content of alkali elements 21,30 (especially Mg 2+ and Ca 2+ ), which was further confirmed by the result of EDX analysis (Fig.…”