Arsenic in Water Its Impact and Treatment.pptx

Arsenic in water

1. Presenter : Moawiz Gondal , Ali Raza Semester : 7 th Reg.no : 70112907, 70112751 Instructor : Dr. Atif Irshad Subject : Pollution Control Technologies

2. Table of Content Introduction Sources Health and environmental risk Detection of arsenic Arsenic treatment technologies and methods Government regulations and initiatives Conclusion

3. Introduction

4. Common sources of arsenic in water Groundwater contamination Industrial discharges Mining activities Geographical regions prone to contamination Asia, South America, and parts of North America Factors affecting arsenic levels in water pH, oxidation-reduction potential, and microbial activity Arsenic in Water Sources

5. Health and Environmental Risks 1 Chronic Arsenic Toxicity Arsenic exposure over time can cause several health issues, including skin lesions, cancer, cardiovascular disease, and respiratory disorders. 2 Environmental Impacts Arsenic contamination affects soil health, aquatic ecosystems, and biodiversity, leading to far-reaching environmental consequences. 3 Human Nutrient Deficiencies Arsenic exposure has been linked to nutrient deficiencies, including vitamin E, folate, zinc, and calcium. 4 Widespread Problem Arsenic contamination affects millions of people worldwide, mainly in developing countries with inadequate water treatment infrastructure.

6. O rganizations working on Arsenic in Water in Pakistan Pakistan Council of Research in Water Resources ( PCRWR) Pakistan Council of Scientific and Industrial Research (PCSIR ) World Health Organization (WHO) – Pakistan International Water Management Institute (IWMI) - Pakistan United Nations Development Programme (UNDP) – Pakistan Environmental Protection Agency (EPA) - Pakistan

7. Analytical methods for arsenic detection Laboratory techniques (ICP-MS, AAS) Field testing kits (colorimetric methods) Importance of regular water testing Early detection and prevention Ensuring water quality and safety Detecting Arsenic in Water

8. Coagulation and precipitation Chemicals such as ferric chloride or alum are added to water, causing arsenic to form flocs that can be easily removed. Filtration (activated alumina, iron oxide ) A porous medium that adsorbs arsenic. As water passes through, arsenic molecules adhere to the surface. Ion exchange Arsenic ions are exchanged with harmless ions like chloride on the surface of a resin. Adsorption (activated carbon ) Highly porous carbon material that adsorbs arsenic. Arsenic Treatment Technologies

9. Arsenic Treatment Methods Household Filtration Systems Activated alumina, reverse osmosis, and ceramic filters are some of the household-level options to reduce arsenic levels in water. Community-Level Treatment Community management, bank filtration, and biosand filters are a few community-scale treatment methods that can provide clean water. Large-Scale Treatment Water treatment plants using adsorption, coagulation, and chemical precipitation processes are effective for significantly reducing arsenic concentration in large quantities of water.

10. Government Regulations and Initiatives 1 Monitoring and Testing Standards The EPA has set a maximum contaminant level (MCL) of 10 µg/L of arsenic in drinking water. Public water systems must regularly test and monitor for arsenic to ensure compliance with safety standards. 2 Funding for Arsenic Treatment Initiatives The Safe Drinking Water Act provides funding for developing water infrastructure, including arsenic treatment facilities. Various state and federal programs also aid in financing arsenic remediation projects. 3 Public Awareness Campaigns In addition to regulatory measures, public health campaigns raising awareness about the risks of arsenic in water have been instrumental in encouraging individual and collective efforts to mitigate the problem.

11. Conclusion Importance of Addressing Arsenic Contamination Clean water is essential for human health, and arsenic contamination poses a significant threat. Addressing the issue requires individual and collective efforts to combat the problem at every level . Through awareness and action, we can promote the importance of clean water and support funding for arsenic treatment initiatives to improve access to safe drinking water worldwide.

12. References Jain, R. (2022). "Recent advances of magnetite nanomaterials to remove arsenic from water." RSC advances 12 (50): 32197-32209. Singh, S., et al. (2022). "Potential of indigenous plant species for phytoremediation of arsenic contaminated water and soil." Ecological Engineering 175 : 106476. Zhang, K., et al. (2023). "Remediation of cadmium or arsenic contaminated water and soil by modified biochar : A review." Chemosphere 311 : 136914.  

13. Thank you! Any Questions?