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Development Of Low-Cost Adsorbents From Biomass Residues For The Removal Of Organic Contaminants And Heavy Metals From Aqueous Solutions., Sunith Babu Madduri
Development Of Low-Cost Adsorbents From Biomass Residues For The Removal Of Organic Contaminants And Heavy Metals From Aqueous Solutions., Sunith Babu Madduri
Theses and Dissertations
Increasing population across the globe paved the way for rapid growth in industrialization. Pharmaceuticals, automotive, textiles, agriculture, electronics, electrical and many other industries discharge different types of heavy metals, dyes and organic contaminants into ground water. These discharges are released into lakes and rivers without prior treatment causing huge environmental impact to the environment. Among different remediation techniques, adsorption was considered the most promising method because of its low-cost and high efficiency. Biomass is considered as the most practical and renewable source for production of bio products and biofuels. Biomass is also used for carbon sequestration and as an essential …
Removal Of Molybdenum From Contaminated Water Using Douglas Fir Biochar/Iron Oxide Composites, Naba Krishna Das
Removal Of Molybdenum From Contaminated Water Using Douglas Fir Biochar/Iron Oxide Composites, Naba Krishna Das
Theses and Dissertations
Molybdenum (Mo) is a naturally occurring trace element that is present in drinking water mostly in the molybdate (MoO42-) form in well water. Recently, the EPA deemed Mo as a potential contaminant because exposure can lead to health effects such as gout, hyperuricemia, and lung cancer. In this work, we have assessed the sorptive removal of Mo using Douglas fir biochar (DFBC) and its chemically-coprecipitated iron oxide analogue (DFMBC). Adsorption was studied varying the batch sorption conditions; pH, equilibrium time (5 min-24 h), initial Mo concentrations (2.5-1000 mg/L), temperatures (5, 25, and 40 °C) and equilibrium method. Langmuir capacities for …
Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Ethan Phan, Adrian Damian, Kevin Le, Mary Johnson, Courtney Golman, Michelle Dopp, Jacqueline Payne
Removal Of Fluoride From Mine Water Via Adsorption For Land-Applied Soil Amendment, Ethan Phan, Adrian Damian, Kevin Le, Mary Johnson, Courtney Golman, Michelle Dopp, Jacqueline Payne
Chemical Engineering Undergraduate Honors Theses
The process of mining minerals and elements from ores and rocks creates acid rock drainage (ARD). This drainage is water that contains heavy metals and minerals that can be dangerous for human consumption or damaging to the environment. The mining industry has employed various water treatment methods to prevent these metals and minerals from being discharged into water sources such as ponds, lakes, and streams. Currently, the most used treatment process in the mining industry is a cost-effective high-density sludge (HDS) process. This method reduces the concentration of metals and elements with the use of lime/limestone. However, the concentration of …
Comparison Of The Pfas Adsorption Capabilities Of A Coconut Shell Based Granular Activated Carbon And A Bituminous Coal Based Granular Activated Carbon, Matthew D. Holliday
Comparison Of The Pfas Adsorption Capabilities Of A Coconut Shell Based Granular Activated Carbon And A Bituminous Coal Based Granular Activated Carbon, Matthew D. Holliday
Theses and Dissertations
This research compares the ability of two granular activated carbons (GAC) from different material sources to adsorb perfluoroalkyl substances (PFAS) in deionized water. A bottle study design was used to conduct the research, which measured the reduction in perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). The carbons used were the bituminous coal based Calgon Filtrasorb 600 (F600) and the coconut shell based Evoqua AquaCarb 1230CX (AC1230CX). Additionally, the research focused on the rates at which the two contaminants were removed and compared them to previous research conducted with different forms of GAC. Results showed that both GACs were capable …