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Ndlovu Knowledge Siyabonga Moloto Makwena Justice Sekhosana Kutloano Edward Nkambule Thabo Thokozani Innocent Managa Muthumuni 《Environmental science and pollution research international》2023,30(5):11210-11225
Environmental Science and Pollution Research - Photodynamic antimicrobial chemotherapy (PACT) is extensively studied as a strategic method to inactivate pathogenic microbes in wastewater for... 相似文献
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Nkambule TI Kuvarega AT Krause RW Haarhoff J Mamba BB 《Environmental science and pollution research international》2012,19(9):4120-4132
Introduction
The removal of natural organic matter (NOM) from water is becoming increasingly important in order to prevent the formation of carcinogenic disinfection by-products. The inadequate removal of NOM has a bearing on the capacity of the other treatment processes to remove organic micro-pollutants or inorganic species that may be present in the water. New methods are therefore currently being sought to effectively characterise NOM and also to ensure that it is sufficiently removed from drinking water sources.Methodology
Nitrogen- and palladium-co-doped TiO2 was synthesised by a modified sol?Cgel method and evaluated for its photocatalytic degradation activity on NOM fractions under simulated solar radiation. The photocatalyst was characterised by FT-IR, Raman, XRD, DRUV?Cvis, SEM, TEM, EDS, XPS and TGA. FT-IR confirmed the presence of OH groups on thermally stable, nearly spherical anatase nanoparticles with an average diameter of 20?nm. PdO species appeared on the surface of the TiO2 as small uniformly dispersed particles (2 to 3?nm). A red shift in the absorption edge compared to commercial anatase TiO2 was confirmed by DRUV?Cvis. In order to gain a better insight into the response of NOM to photodegradation, the NOM was divided into three different fractions based on its chemical nature.Results and discussion
Photodegradation efficiencies of 96, 38 and 15?% were realised for the hydrophobic, hydrophilic and transphilic NOM fractions, respectively. A reasonable mechanism was proposed to explain the photocatalytic degradation of the NOM fractions. The high photocatalytic activity could be attributed to the larger surface area, smaller crystalline size and synergistic effects of the co-dopants N and Pd in the TiO2 crystal. 相似文献3.
Masanabo Ntombenhle Orimolade Benjamin Idris Azeez O. Nkambule Thabo T. I. Mamba Bhekie B. Feleni Usisipho 《Environmental science and pollution research international》2023,30(6):14062-14090
Environmental Science and Pollution Research - Globally, ibuprofen is the third most consumed drug and its presence in the environment is a concern because little is known about its adverse effects... 相似文献
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