Enhanced removal of p-chloroaniline from aqueous solution by a carboxylated polymeric sorbent

Synergetic Hydroxyl Radical Oxidation with Atomic Hydrogen Reduction Lowers the Organochlorine Conversion Barrier and Potentiates Effective Contaminant Mineralization

“…However, redox synergy between atomic hydrogen (H*) and •OH has been found to achieve highly efficient degradation of persistent refractory chlorinated organics. ,, Herein, considering that p -chloroaniline (4-CN) as the chemical raw material has been widely used for synthesizing pesticides, dyes, plastics, preservatives, and medicines, − the presence of this organochlorine and its intermediate metabolites in the aqueous environment certainly will pose a risk to the ecological system . In addition to the limited removal rate, the generation of a high concentration of degradation intermediates was the other restriction toward 4-CN removal by •OH alone dominated oxidation reactions. , In contrast, the redox synergy could effectively reduce the reaction energy barriers of 4-CN removal, which was mainly attributed to the H*-initiating nucleophilic hydrodechlorination and •OH-initiating electrophilic oxidization of critical intermediates (Figure S1). ,, The resulting intermediates produced were unstable and could be further converted to H 2 O, CO 2 , and other harmless products, leading to their effective removal.…”

“…21 In addition to the limited removal rate, the generation of a high concentration of degradation intermediates was the other restriction toward 4-CN removal by •OH alone dominated oxidation reactions. 18,22 In contrast, the redox synergy could effectively reduce the reaction energy barriers of 4-CN removal, which was mainly attributed to the H*-initiating nucleophilic hydrodechlorination and •OH-initiating electrophilic oxidization of critical intermediates (Figure S1). 13,16,23 The resulting intermediates produced were unstable and could be further converted to H 2 O, CO 2 , and other harmless products, leading to their effective removal.…”

Cutting Mechanism and Model for Cutting Al/SiCp Composites

“…The above cutting models well reflected the particle wear behavior caused by the scoring on the tool flank by the SiC particles in the matrix. Some researchers pointed out that an economic machining speed in cutting practice required cutting SiCp/Al composites in low speed [7,8], but few reports have concerned the mechanism of low-speed cutting and the law of tool wearing. Therefore, the study on the low-speed cutting mechanism of SiCp/Al composites and corresponding tool wear models is of considerable practical significance.…”

Application of the Polanyi potential theory to phthalates adsorption from aqueous solution with hyper-cross-linked polymer resins

“…In the past few decades, polymeric adsorbent has been emerging as a potential alternative to activated carbon because of high surface area, improved mechanical rigidity, adjustable matrix, pore structure, and feasible regeneration [4][5][6]. In our previous studies, some chemically modified and unmodified hyper-cross-linked polymeric resins have also been synthesized and applied in organic pollution control for industrial waste streams [7][8][9]. Obviously, the adsorption capacity of a polymeric adsorbent to a target organic contaminant is one of the most important parameters for engineering design of adsorption technology.…”