Red mud powders as low-cost and efficient catalysts for persulfate activation: Pathways and reusability of mineralizing sulfadiazine

2016 ◽  
Vol 167 ◽  
pp. 136-145 ◽  
Author(s):  
Yong Feng ◽  
Deli Wu ◽  
Changzhong Liao ◽  
Yu Deng ◽  
Tong Zhang ◽  
...  
Keyword(s):  
Red Mud ◽  
Low Cost ◽  
Persulfate Activation ◽  
Activation Pathways

scholarly journals Red Mud-Based Polyaluminum Ferric Chloride Flocculant: Preparation, Characterization and Flocculation Performance

2021 ◽  
Author(s):  
Yong Cheng ◽  
Longjun Xu ◽  
Chenglun Liu ◽  
Zao Jiang ◽  
Qiyuan Zhang ◽  
...  
Keyword(s):  
Red Mud ◽  
High Efficiency ◽  
Low Cost ◽  
Oxygen Demand ◽  
Industrial Applications ◽  
Iron Chloride ◽  
Raw Material ◽  
Molar Ratio ◽  
Polymerization Temperature ◽  
Solution Ph

Abstract In this work, red mud was used as raw material to extract Al and Fe with hydrochloric acid. The high-efficiency polyaluminum iron chloride (PAFC) flocculant was prepared via adjusting the pH of the leaching solution, the molar ratio of aluminum and iron, and the polymerization temperature. The effect of synthesis and flocculation conditions on the flocculation performance of aged landfill leachate was investigated. The results confirmed that the PAFC prepared at the polymerization pH of 2.5, the Al/Fe molar ratio of 8, and the polymerization temperature of 70 °C had the optimum flocculation effect. The flocculation consequences of PAFC and commercial polyaluminum iron chloride flocculant (CPAFC) under different flocculation conditions were compared. The chemical oxygen demand (COD), UV254, chroma and settlement height of PAFC at flocculant concentration of 60 g/L and solution pH of 6 were 72.2%, 79.2%, 82.9% and 9.5 cm (within 90 min), respectively. PAFC has excellent flocculation performance and can be used as a simple, potentially low-cost wastewater treatment agent in industrial applications.

scholarly journals Assessing Options for Remediation of Contaminated Mine Site Drainage Entering the River Teign, Southwest England

Minerals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 721 ◽  
Author(s):  
Abigail Jordan ◽  
Rachel Hill ◽  
Adrienne Turner ◽  
Tyrone Roberts ◽  
Sean Comber
Keyword(s):  
Red Mud ◽  
Metal Removal ◽  
Environmental Concern ◽  
Low Cost ◽  
Waste Product ◽  
Treatment Method ◽  
Mining Operations ◽  
Metal Concentrations ◽  
Cost Treatment ◽  
Mine Sites

The river Teign in Devon has come under scrutiny for failing to meet environmental quality standards for ecotoxic metals due to past mining operations. A disused mine known as Bridford Barytes mine, has been found to contribute a significant source of Zn, Cd and Pb to the river. Recently, studies have been focused on the remediation of such mine sites using low-cost treatment methods to help reduce metal loads to the river downstream. This paper explores the metal removal efficiency of red mud, a waste product from the aluminium industry, which has proven to be an attractive low-cost treatment method for adsorbing toxic metals. Adsorption kinetics and capacity experiments reveal metal removal efficiencies of up to 70% within the first 2 h when red mud is applied in pelletized form. Further, it highlights the potential of biochar, another effective adsorbent observed to remove >90% Zn using agricultural feedstock. Compliance of the Teign has been investigated by analysing dissolved metal concentrations and bioavailable fractions of Zn to assess if levels are of environmental concern. By applying a real-world application model, this study reveals that compressed pellets and agricultural biochar offer an effective, low-cost option to reducing metal concentrations and thus improving the quality of the river Teign.

scholarly journals Removal Of Phenol From Wastewater By Using Low-Cost Catalyst From Metal Production

2014 ◽  
Vol 22 (341) ◽  
pp. 55-59
Author(s):  
Blanka Galbičková ◽  
Maroš Soldán ◽  
Michal Belčík ◽  
Karol Balog
Keyword(s):  
Uv Radiation ◽  
Red Mud ◽  
Advanced Oxidation Processes ◽  
Low Cost ◽  
Advanced Oxidation ◽  
Emerging Technology ◽  
Mercury Lamp ◽  
Metal Production ◽  
Oxidation Processes ◽  
Uv Photodegradation

Abstract Utilization of AOPs (Advanced oxidation processes) as an emerging technology for removing of pollutants from wastewater is developed. In this paper, UV photodegradation was used for removing of phenol from wastewater. As a source of UV radiation medium pressure mercury lamp with output 400W was used. The influence of low-cost catalysts on this process was also monitored. Wastes from metal production, red mud and black nickel mud, were used as catalysts.

Feasible low-cost conversion of red mud into magnetically separated and recycled hybrid SrFe12O19@NaP1 zeolite as a novel wastewater adsorbent

2020 ◽  
pp. 128090
Author(s):  
Yong Cheng ◽  
Longjun Xu ◽  
Zao Jiang ◽  
Chenglun Liu ◽  
Qiyuan Zhang ◽  
...  
Keyword(s):  
Red Mud ◽  
Low Cost

Evaluation on the stabilization of Zn/Ni/Cu in spinel forms: Low-cost red mud as an effective precursor

2019 ◽  
Vol 249 ◽  
pp. 144-151 ◽  
Author(s):  
Minhua Su ◽  
Chang-Zhong Liao ◽  
Shengshou Ma ◽  
Kuibao Zhang ◽  
Jinfeng Tang ◽  
...  
Keyword(s):  
Red Mud ◽  
Low Cost

Persulfate activation by modified red mud for the oxidation of antibiotic sulfamethoxazole in water

2020 ◽  
Vol 270 ◽  
pp. 110820 ◽  
Author(s):  
Alexandra Ioannidi ◽  
Paula Oulego ◽  
Sergio Collado ◽  
Athanasia Petala ◽  
Victor Arniella ◽  
...  
Keyword(s):  
Red Mud ◽  
Persulfate Activation

The Application of Red Mud on Restoring Heavy Metal Contaminated Water and Soil

2011 ◽  
Vol 225-226 ◽  
pp. 1262-1265 ◽  
Author(s):  
Yan Fei Ma ◽  
Xue Dong Feng
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Red Mud ◽  
Heavy Metal Ions ◽  
Alkali Treatment ◽  
Low Cost ◽  
Soil Microbial Activity ◽  
Contaminated Water ◽  
Environmental Restoration ◽  
Soil Microbial

Red mud as environmental restoration materials has the characteristics of low cost, simple process and controlling waste by waste. The paper introduced the application of red mud on heavy metal contaminated water and soil in details. Powdered or granular red mud both has good adsorption efficiency of Cu , Zn, Pb, Ni, Ca, Cd, As and other heavy metal ions in wastewater. Langmiur or Frendlich model can express the adsorption isotherm of red mud on heavy metal ions. Red mud can not only solidify the heavy metals in soils, but also increase the soil microbial activity and population types. At the same time, de-alkali treatment can not be ignored in the process of using red mud avoiding the second pollution to environment, and achieve the zero pollution release of red mud.

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