Fe(III)-, Co(II)- and Ni(II)-impregnated MCM41 for wet oxidative destruction of 2,4-dichlorophenol in water

Sulphonated cobalt phthalocyanine–MCM-41: An active photocatalyst for degradation of 2,4-dichlorophenol

“…Subsequently, hydroxyl groups would break the aromatic rings of chlorobenzoquinone transferring them into simple acids like oxalic acid, acetic acid, etc. as the final products [70,71]. A number of the intermediates identified by us (Table 3) are in agreement with those reported in a recent work on the photodegradation of 2,4-DCP by polydivinylbenzene-supported zinc phthalocyanine [58].…”

Adsorption and heterogeneous advanced oxidation of phenolic contaminants using Fe loaded mesoporous SBA-15 and H2O2

“…As compared with activated carbons, SBA-15 and Fe/SBA-15 exhibit lower adsorption and can have a comparable adsorption with some agricultural waste derived carbons. [23]. Luo et al [6] reported catalytic property of Fe-Al pillared clay for Fenton oxidation of phenol by H 2 O 2 .…”

Removal of 2,4‐dichlorophenol by aluminium/O2/acid system

“…In response to further hydroxyl radical attacks, 2‐chlorohydroquinone loses two hydrogen atoms to yield 2‐chloro‐1,4‐benzoquinone (III). 2‐chloro‐1,4‐benzoquinone is likely to be a predominant intermediate because the para ‐position in 2,4‐DCP is the preferred site for •OH attack and Cl atom at the ortho ‐position may somehow hinder it from further attack due to the steric hindrance effect of hydroxyl group in the ortho ‐position . In the other reaction route (pathway II), the attack of C–H bonds by •OH leads to the addition of an electrophilic ‐OH group to the 2,4‐DCP aromatic ring, forming chlorinated resorcinols.…”

“…2-chloro-1,4-benzoquinone is likely to be a predominant intermediate because the para-position in 2,4-DCP is the preferred site for •OH attack and Cl atom at the ortho-position may somehow hinder it from further attack due to the steric hindrance effect of hydroxyl group in the ortho-position. 34 In the other reaction route (pathway II), the attack of C-H bonds by •OH leads to the addition of an electrophilic -OH group to the 2,4-DCP aromatic ring, forming chlorinated resorcinols. For example, the attack of •OH at positions 6, 5, and 3 of 2,4-DCP yields 4,6-dichlororesorcinol (IV), 3,5-dichlorocatechol (V), and 2,4-dichlorocatechol (VI), respectively.…”