Treatment of artificial wastewater contaminated with azo dyes by simulated shallow ponds system Dina A. Yaseen, Miklas Scholz The industrial revolution and rapid population growth have increased the demand for textile materials, which has consequently increased the number of textile industries and their effluents, to be one of the major causes of global environmental pollution challenges due to the presence of dyes. These dyes in addition to their unacceptable appearance, often produce toxic breakdown intermediates. Biological treatment alternatives such as constructed wetland ponds are likely to be sustainable and cost-effective. The aim of this study is to investigate the potential of shallow ponds system in presence of Lemna minor and/or algae for the treatment of artificial wastewater contaminated with textile dyes at a concentration of 5 mg/l. The objectives were to assess and compare the (i) outflow water quality parameters such as pH, suspended solids (SS), and total dissolved solids (TDS); (ii) removal efficiency of four azo dyes: acid blue 113 (AB113), reactive blue 198 (RB198), basic red 46 (BR46) and direct orange 46 (DO46); (iii) chemical oxygen demand (COD) removal efficiency; (iv) relative growth rate of the L. minor. Findings indicate that the outflow values of pH and TDS are within the standard limits for discharge to the aquatic environment and the shallow pond planted with L. minor is effective significantly (p < 0.05) for treating the dye BR46 higher than other dyes. All ponds showed low COD removal. Furthermore, the growth of L. minor was inhibited by BR46. This work will contribute to a better understanding of the performance of sustainable vegetated treatment ponds for dye pollution removal.
Abstracts – Poster Presentations Effect of Nigella Sativa seeds and Ajwa date on Blood glucose level Among Saudi patients with Type 2 Diabetes Mellitus and Healthy subjects Reham Algheshairy, Khaled Tayeb , Christopher Smith , Rebecca Gregg, Haruna Musa Background: Diabetes is a medical condition that refers to the pancreas’ inability to secrete sufficient insulin levels, a hormone responsible for controlling glucose levels in the body. Any surplus glucose in the blood stream is excreted through the urinary system. Insulin resistance in blood cells can also cause this condition despite the fact that the pancreas is producing the required amount of insulin. A number of researchers claim that the prevalence of diabetes in Saudi Arabia has reached epidemic proportions, although one study did observe one positive in the rise in the awareness of diabetes, possibly indicative of Saudi Arabia’s improving healthcare system. While a number of factors can cause diabetes, the everincreasing incidence of the disease in Saudi Arabia has been blamed primarily on low levels of physical activity and high levels of obesity. Objectives: The project has two aims. The first aim of the project is to investigate the regulatory effects of consumption of Nigella seeds and Ajwah dates on blood glucose levels in diabetic patients with type 2 diabetes. The second aim of the project is to investigate whether these dietary factors may have potential beneficial effects in controlling the complications that associated with type 2 diabetes. Methods: This use a randomised controlled intervention trail of 150 volunteers male and female, aged between 18 and 60 years. The 150 participants were divided equally into 75 controls (healthy participants and 75 patients with type 2 diabetes). The control and intervention groups were further subdivided into three groups, with 25 participants in each group, depending on whether the group consumed a modified diet, Ajwa date and Nigella Sativa Seeds for 12 weeks. Anthropometric measurements were taken at baseline, along with bloods for HbA1c, fasting blood sugar and at the end of 12 weeks. Results: This study found significant decrease in blood level (FBG & 2PPBG) and HbA1c in the groups with diet and Nigella seeds) compared to Ajwa date. However, there is no significant change were found in HbA1c, FBG and 2hrpp regarding Ajwa group. Conclusion: This study illustrated a significant improvement in some markers of glycaemia following 2 g of Ns and diet for 12 weeks. The dose of 2g/day of consumed Nigella seeds was found to be more effective in controlling BGL and HbA1c than control and Ajwa groups. This suggests that Nigella seeds and following a diet may have a potential effect (a role in controlling outcomes for type 2 diabetes and controlling the disease). Further research is needed on a large scale to determine the optimum dose and duration of Nigella and Ajwa in order to achieve the desired results.