Tetracycline adsorption by H3PO4-activated carbon produced from apricot nut shells: A batch study

Efficient Heterogeneous Activation of Persulfate by Iron-Modified Biochar for Removal of Antibiotic from Aqueous Solution: A Case Study of Tetracycline Removal

“…Both of SCG and Fe-SCG exhibited two distinct peaks at 2θ of 25°, indicating the occurrence of lignocellulose structure, which is in good agreement with the biochars synthesized from the spent coffee ground reported by Ballesteros et al [24] and Cho et al [27]. Figure 2c shows Fe3C mineral with peaks at 29.5°, 40.7°, 42.6°, 45.0° and 49.8°, which were attributed to the (111), (201), (211), (031) and (221) crystal planes (JCPDS 65-2412) was mainly found in Fe-SCG. This might be due to the formation of Fe3C during the pyrolysis under N2 condition.…”

High-efficiency adsorption and regeneration of methylene blue and aniline onto activated carbon from waste edible fungus residue and its possible mechanism

“…More MB molecules are transported from the aqueous solution to the EFAC surface, resulting in higher MB removal rate. 45 The adsorption of aniline by EFAC is like that of MB. When the aniline initial concentration increased from 5 to 100 mg L À1 , the adsorption capacity increased from 0.89 to 12.63 mg g À1 , but the removal of 89.10% at 5 mg L À1 decreased to 63.16% at 100 mg L À1 .…”

Environmental surface chemistries and adsorption behaviors of metal cations (Fe3+, Fe2+, Ca2+ and Zn2+) on manganese dioxide-modified green biochar

“…† As observed, CP calcined at 400-600 C for 1-4 h presented peaks at wavenumbers of 3500 cm À1 (-OH and -NH), 2900 cm À1 (C-H), 1735 cm À1 , 1600 cm À1 (C]O and C]C), 1217 cm À1 , 1114 cm À1 and 1030 cm À1 (C-O), which should be attributed to the vibrations of various acidbase functional groups, such as carboxylic, lactone, phenolic and amino groups. 17 Here, the calcination temperature and time had signicant effects on the enhancement of carbonyl group levels. However, the decomposition of these functional groups on activated CP may occurred with conversion into CO 2 in the case of excessively high calcination temperatures and long calcination times being applied, leading to deactivation and the low performance of the adsorbent for metal cation removal.…”