Abstract：
:Typically contained within ambient surface waters and certain industrial wastewaters, are plentiful halide ions, which possess varying degrees of photosensitivity. The effects of halide ions on the photodegradation of ibuprofen (IBP) were investigated under UV irradiation using a 500 W mercury lamp as a light source. Studies of the mechanism of halide ions were inclusive of both their light shielding effects and quenching experiments. The results indicated that chloride ion has a slight inhibition against IBP photodegradation under neutral condition, and significant inhibition is observed with bromide ions and iodide ions. In addition to the observed increased rate of IBP photodegradation in conjunction with elevated pH in solution, the inhibitory effect of halide ions was different. When the pH value of the IBP solution was 5, chloride ions were seen to facilitate the photodegradation of IBP. Halide ions can inhibit IBP photodegradation by means of a light attenuation effect. All of the halide ions significantly facilitated the generation of 1O2.
journal_name
Chemospherejournal_title
Chemosphereauthors
Li F,Kong Q,Chen P,Chen M,Liu G,Lv W,Yao Kdoi
10.1016/j.chemosphere.2016.09.108subject
Has Abstractpub_date
2017-01-01 00:00:00pages
412-417eissn
0045-6535issn
1879-1298pii
S0045-6535(16)31309-1journal_volume
166pub_type
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