Nowadays, one of the major problems that can face humankind is the water pollution. In this regard, making this natural resource a fresh and unpolluted is a major social and economic concern. However, a great attention has been given for the removal of organic pollutants discharged within wastewater by using advanced oxidation processes (AOPs) based on generation hydroxyl radicals. Among these, Ozone-Fenton (O3/H2O2/Fe2+) process used in this study as AOPs to remove chemical oxygen demand (COD) from Disperse Blue 79 (DB 79) dye in wastewater. Also, the effect of various experimental parameters such as ozone mass flow rate, mole ratio (mole H2O2/mole Fe2+), and reaction time on the COD removal efficiency of DB 79 were studied with constant initial concentration 60 mg/L of DB 79. Based on the results obtained in this study, the maximum COD removal efficiency was 85% achieved at optimum operating parameters are 288 mg/L. h ozone mass flow rate, 33.53 mole ratio (150 mg/L H2O2, 20 mg/L Fe2+), and 60 min reaction time. All Ozone-Fenton experiments were performed using Jar test apparatus at room temperature (23°C ∓ 2) and atmospheric pressure (1 atm). Finally, Ozone-Fenton offered an effective solution as AOPs for degrading pollutant especially DB 79 discharged within wastewater from various industrial processes.
Baghdad, considered one of the most polluted and populated cities in Iraq, waschoosen for mapping the distribution of air pollutants and the overall pollution levels by using the ArcGIS techniques. Six of main observation stations werechoosen in a particular location. Then, the recorded data from these stations were spatially interpolated using two types of ArcGIS interpolation techniques. The spatial interpolation techniques used in this work were Inverse distance weighting (IDW) and fuzzy logic. This study includes measuring the main air pollutants, which were nitrogen dioxide (NO2), sulfur dioxide (SO2), carbon monoxide (CO), nitrogen oxide (NOx), and nitrogen monoxide (NO) during the period from January 2018 to December 2018. The data recorded by the stations during the work period and the distribution maps of air pollutants, which resulted from spatial interpolation (IDW) method, showed that the concentration of NO2 was within the International limits of World Health Origination (WHO) which is about 0.11 ppm. SO2 concentrations were exceeding the WHO limits in all stations for the study area. The concentrations of CO ranged from 0.484 ppm to 7.027 ppm that were within acceptable limits of WHO standards that is 9 ppm. NOx concentrations ranged between 0.01506 ppm – 0.214 ppm, which were exceeding acceptable limits of WHO standards (0.01 ppm). The concentrations of NO did not exceed the WHO standard limits, which are 0.08 ppm. Finally, the fuzzsy logic method of spatial interpolation in ArcGIS was applied to evaluate the air pollution over Baghdad city.
The selection of an effective water treatment technology is the important issues that relatively dealing with water pollution problems, some pollutants need more than the conventional facilities to be treated and discharged within the national standards. This study highlights some of the advanced treatment methods related to chemical oxidation, which is used in the treatment of some types of pollutants such as heavy metals, pesticides, dyes, etc. and demonstrate their effectiveness in treatment by reviewing what has been concluded in a number of studies in this range. © 2018 JASET, International Scholars and Researchers Association
Solid waste management operations are collecting, transportation, and disposal of residential, commercial, institutional, construction, demolition, and wide street areas; the result of the daily activity of humans needs to be properly managed. Iraq faces many problems associated with its unregulated solid waste systems. First, however, this study examined the reality of solid waste management in Iraq and ways to develop it. The total number of participants in this research was 326 participants .The data collected in February and March 2021, interview methodology and questionnaire which used, and the analysis software used for this research is IBM SPSS version 23; the two methodologies were used and combined to reach the largest possible amount of qualitative and quantitative information that may be absent from the researcher and to reach good results and outputs for the research, for reasons including obtaining more and deeper information to reach the largest segment of society and to achieve the goals of the thesis and obtain good results by integrating the two methodologies. The study concluded by analyzing the data, The municipality’s weak role and the lack of regular timetables in organizing waste collection and transportation operations, and 64% agreed that there are not sorting of waste from the source; also, the lack of cooperation and coordination between the public and the municipality, 39% agreed that most municipalities do not have healthy and environmentally safe landfills for waste disposal, 33% strongly agreed that there are no appropriate policies and laws that enhance the effectiveness of solid waste management, 49% strongly agreed that residents are ready to sort the waste in the designated place in case the municipality provides the containers, 53% agreed that residents are willing to pay for collecting waste from their homes or stores. After analyzing the study results, Iraq needs stations for sorting and transporting waste and stations for recycling plastic, paper and metals. Also, there is a need for sanitary landfills compatible with environmental conditions, and the municipality should play a greater role and give the private sector a greater role in the solid waste management process and overcome obstacles that hinder the work of investment companies, in addition to raising community awareness through holding educational workshops. For example, in schools and universities to spread environmental awareness in the community.
Global water contamination by different sorts of pollutants become an emerging environmental concern. Using microalgae as pollutants removal element has currently gained scientific attention. The study aims to examine the capacity of Chlorella sp and Anabaena sp simultaneous, remediate hospital wastewater at 22°C and 32°C on gradient concentration of Nutrients and organic matters 5%, 25% and 50%, the parameters measured on the day 1, 4, 10 and 14 of planting them in lab bioreactors. The results showed greater vitality of Chlorella sp and Anabaena sp to remove pollutants at both temperatures at 50% concentration. At 22°C Anabaena sp showed more removal efficiency of PO4 than Chlorella sp at 100% and 82%, respectively, while for NO3 both almost have the same ability at 99% and 94% sequentially. It was similar to COD when the removal percentage was 94% for both of them. At 32°C the results illustrated different pattern of removal for NO3 and COD but, it was same for PO4. Chlorella sp has better removal proportion for NO3 at 76% and COD at 93% compare to Anabaena sp for NO3 and COD at 54% and 92%. However, Anabaena sp removes 69% and Chlorella sp 56% of PO4 at this temperature. Our study indicates that the microalgae performed great ability to remove and capacity of growth in this type of wastewater which is appearing to play a key role in biodegradation process through high removal efficiency and low environmental impact.
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