Effects of inorganic ions on the photocatalytic degradation of carbamazepine | Zendy

Xiaoya Gao | Zendy; Qian Guo | Zendy; Guangbei Tang | Zendy; Peng Wen | Zendy; Yongming Luo | Zendy; Dedong He | Zendy

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Effects of inorganic ions on the photocatalytic degradation of carbamazepine

Author(s) -

Xiaoya Gao,

Qian Guo,

Guangbei Tang,

Peng Wen,

Yongming Luo,

Dedong He

Publication year - 2019

Publication title -

journal of water reuse and desalination

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.548

H-Index - 16

eISSN - 2408-9370

pISSN - 2220-1319

DOI - 10.2166/wrd.2019.001

Subject(s) - photocatalysis , degradation (telecommunications) , inorganic ions , adsorption , chemistry , carbamazepine , pollutant , environmental impact of pharmaceuticals and personal care products , quenching (fluorescence) , nuclear chemistry , environmental chemistry , ion , photochemistry , inorganic chemistry , catalysis , organic chemistry , environmental engineering , wastewater , environmental science , telecommunications , physics , quantum mechanics , neuroscience , computer science , epilepsy , fluorescence , biology

Carbamazepine (CBZ) is a typical class of pharmaceuticals and personal care products (PPCPs), and is a serious threat to the environment and human health. Photocatalytic degradation is an efficient technology to remove CBZ. However, the present work focused mainly on the improvement of photocatalytic degradation performance. The information about the effects of inorganic ions on the photocatalytic degradation activity of environmental pollutants is still scarce. This study systematically investigated the effects of inorganic ions on the photocatalytic degradation of CBZ in view of the practical applications. The addition of inorganic anions showed a negative effect on photocatalytic degradation of CBZ with the order of inhibition effects of HCO3− > Cl− > NO3−. This was due to the quenching effects of hydroxyl radicals or holes, which decreased the photocatalytic degradation of CBZ. The presence of Al3+ could adsorb on the surface of a photocatalyst to shield the active site, resulting in the decreased CBZ degradation, while coexistence of Ca2+ significantly promoted the photocatalytic degradation of CBZ owing to the enhanced CBZ adsorption. Mg2+ showed concentration and time-dependent effects (suppression or promotion) on the photocatalytic degradation of CBZ.

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