This study investigated the ability of a HYDRUS 1D model for predicting the vertical distribution of potassium iodine (200 ppm) in soil columns after amendment with five different common remediation materials (gypsum, lime, fly ash, charcoal and sawdust) at a rate of 2.5% (w/w), relative to an unamended control soil. Results shows that relative to the unamended soil, iodine leaching was decreased by all amendments but that the magnitude of the decreases varied with the soil amendment applied. Iodine content was highest in the upper layer of the soil columns and decreased progressively with soil depth. The model was evaluated via comparison of the model simulated values with measured values from the soil column studies. The results showed that the HYDRUS 1D model efficiency was near to 1, indicating that the stimulated results were near to the measured values. Therefore, this study showed that iodine leaching through a soil could be ascertained well using a HYDRUS 1D model. The model over predicted iodine leaching, resulting to a weak correspondence between the simulated and the measured results for iodine leaching. This suggests that the HYDRUS-1D model does not explain accurately different organic and inorganic amended soil and the preferential flow that occurs in these columns. This may be due to the fact that Freundlich isotherm, which is part of the transport equations, does not sufficiently describe the mechanism of iodine adsorption onto the soil particles. This study would help to select amendments for an effective management strategy to reduce exogenous iodine losses from agro-ecosystems. This would also improve understanding of iodine transport in soil profile.

Background: The aim of this audit is to evaluate the characteristics of dental infections requiring hospitalisations, which may help improve preventative and management policies. Methods: This study retrospectively evaluated the patients’ records admitted to a public hospital due to dental infections between 2018 and 2019. Results: A total of 102 patients, mostly in thirties with equal gender distribution were admitted with dental infections, presenting with pain (100%), swelling (99%), Trismus (40.2%), dysphagia (27.4%), fever (21%) >37°C, Tachycardia (24.75%) and Tachypnoea (9.3%). Most patients presented (68%) on weekends, outside regular working hours and public holidays. 54 (52.5%) patients had taken prior antibiotics. Dental Caries, smoking, mental health issues and illicit drug use were featured strongly. The majority of patients (56.4%) underwent treatment under local anaesthesia. The total length of hospital stay was 271 days (mean 2.66). Augmentin was the most prescribed antibiotics. Complications were reported in 8.8% patients, primarily related to airway compromise. Conclusion: Dental infections leading to hospitalizations continue to be a burden on the healthcare system. A notable finding was the presentations primarily on weekends, outside regular hours and public holidays and the majority requiring dental intervention under local anaesthesia. Provision of on call emergency dental services may reduce length of hospital stay and admissions.