For the consideration of treatment cost, process complexity, treatment effect and differences in phosphogypsum characteristics, flotation was proposed as a method for the …
The presence of heavy metals in wastewater has been increasing with the growth of industry and human activities, e.g., plating and electroplating industry, batteries, pesticides, …
The process of petroleum production and exploration generates waste referred to as petroleum sludge (PS). Ordinarily, petroleum sludge is composed of relatively different quantities of oil, water, and solid particles, in the proportions of 30%, 40%, and 30% respectively (Huang et al. 2015).This sludge, which is also known as oily sludge, is a hazardous waste …
The superior removal efficiency of MPs through NB flotation is attributed to the small size and high concentration of NBs, which enhance particle-bubble collisions and adhesion, along with improved hydrophobic interactions. KW - Hong Kong marine water. KW - Microplastic removal. KW - Microplastics. KW - Nanobubble flotation. KW - Plastic pollution
The application of flotation as a separation process, when applied in pollution control or during water treatment, was often criticized due to the possible toxicity of the applied collectors ...
Ultrasonic treatment has been widely used in the mineral flotation process due to its advantages in terms of operational simplicity, no secondary pollutant formation, and safety. Currently, many studies have reported the effect of ultrasonic treatment on mineral flotation and shown excellent flotation performance. In this review, the ultrasonic mechanisms are …
Post-flotation tailings ponds can be sources of wind-borne particles (<63 μm), which can also contaminate surface water, even at long distances from the source. ... The AMD process involves several steps (Reactions 1–4), including the oxidation of sulfide to sulfate with the release of hydrogen cations, resulting in the formation of sulfuric ...
Vegetable oil refineries produce large quantities of wastewater containing organic matter, oils, and greases, creating a significant source of pollution, eutrophication, and esthetic deterioration of aquatic ecosystems. The present study aimed to improve flotation techniques for the separation of oil and water by demonstrating the impact of pH on the removal of chemical …
Determination of microplastic pollution in marine ecosystems and its effective removal using an advanced nanobubble flotation technique Author links open overlay panel Jehad A. Kharraz a b 1, Mingyi Jia a 1, Muhammad Usman Farid a, Noman Khalid Khanzada a c, Nidal Hilal c, Shadi W. Hasan b, Alicia Kyoungjin An a
Dissolved air flotation (DAF) is designed to remove insoluble substances in water such as suspended solids, oils and greases. During the DAF process, tiny bubbles are created by dissolving air into water at high pressure. These bubbles attach to the surface of suspended solids, resulting in the rising of solids and being removed by skimming.
Dissolved air flotation (DAF) technology is one of the efficient techniques for purification of many types of wastewaters which contain pollutants less dense than water.
The objective of this study is to evaluate the effectiveness of the natural flotation process in reducing pollution with reasonable ... Indeed, the natural or artificial flotation process remains a more interesting technology to considerably reduce the pollu-tion of wastewater for the elimination of hydrocarbons, oils
However, the pyrolysis process can release HF gases, leading to noticeable challenges, including atmospheric pollution, volatilization of active Li, and equipment corrosion. Although alkali absorption tackles the exhaust pollution, the intense corrosiveness of inorganic fluoride tends to shorten the working life inside high-temperature ...
The application of flotation as a separation process, when applied in pollution control or during water treatment, was often criticized due to the possible toxicity of the applied...
1. Introduction. A dissolved air flotation (DAF) system has been known as one of the effective water treatments that purifies contaminants through a buoyancy effect by attaching several micro-bubbles on their free surface as shown in the supporting information (Fig. S1; Kwak and Kim, 2017).Since the DAF system was firstly used to treat drinking water reservoirs in …
In the flotation process, the surface potential of precipitated particles in solution has a great influence on the flotation efficiency . Therefore, to explore the surface potential of precipitated particles produced by the chelation process, effect of surfactant on Zeta potential at the surface of flocs under a various chelating pH range was ...
The flotation process was developed on a commercial scale early in the 20th century to. Flotation, in mineral processing, method used to separate and concentrate ores by altering their surfaces to a hydrophobic or hydrophilic condition—that is, the surfaces are either repelled or attracted by water. ...
The air flotation process typically concludes within a few minutes, and has advantages of high separation efficiency, short-time processing, and small-area relocatable occupation. ... secondary pollution, or not meet the demands for large-scale AMD treatment. Thus, the HDS process is still the most commonly used commercial process in the AMD ...
and Ni, just by adding another flotation unit cell in th e end of the process as the process flowchart shown in Fig. 5 proposed in by Yenial and Bulut (2017 ). 3.
Variations in pH and flotation time strongly influence the reduction of pollution by natural flotation, ... Kastali et al. (2021a, b) have studied the reduction in turbidity of pollution from the refining process when treated with an industrial discharge of iron and steel industry rich in FeCl 3 30%. The latter removed more than 95% of ...
The flotation behavior, smelting process, various properties of jamesonite (Pb 4 FeSb 6 S 14) and application of its extraction products were introduced.Jamesonite, as a sulfide mineral with complex composition and structure, is mainly distributed in China. It is usually associated with other sulfides with similar properties. Although the mineral was discovered …
Environmental Science and Pollution Research. 2021. TLDR. The results obtained have shown that the volume of sludge produced during flotation is related to the pollutant load of the …
Micro-bubble flow simulation of dissolved air flotation process for water treatment using computational fluid dynamics technique. / Lee, Kyun Ho; Kim, Haedong; KuK, Jung Won et al. In: Environmental Pollution, Vol. 256, 112050, 01.2020. Research output: Contribution to journal › Article › peer-review
One of the most unique separation techniques is considered to be flotation, which combines three phases: Gas phase, liquid phase, and solid phase (separately). Flotation has …
In the flotation process, the collector refers to a flotation reagent that can change the hydrophobicity of mineral surface and make ore particles adhere to bubbles selectively. ... As a result, traditional pyrometallurgy can cause serious environmental pollution and waste resources due to the low recovery of associated metal elements. With the ...
Flotation constitutes a separation process that originated from mineral processing. Nowadays, wider applications have been found and compared to flotation for water and wastewater treatment.
2.1.1. Part I. The pilot-scale A/A/O process (with anaerobic tank 1.2 m 3, anoxic tank 1.2 m 3, oxic tank 3.6 m 3 and settling tank 1.2 m 3) had been built and stably operated for more than six months (February 2021 to July 2021), with the mixed liquor suspended solids (MLSS) stabilized at 3000 ± 200 mg/L in the bioreactors.The wastewater from the university …
Fluidized bed separation removes lighter particles (<50 μm) from the top in a countercurrent manner by flotation and gravimetric settling techniques which are being utilized in the processing of mineral ore. A frothing agent is used in the froth flotation process whereby contaminants are made to float.
Arsenic is a highly toxic element. Its toxicity to human health includes cancer of the skin, brain, lung, kidney, and stomach (Smith et al. 1992; Wang et al. 2011; Wu et al. 2016).China owns 70% of the world's arsenic resources and is also the largest producer of arsenic with more than 40,000 tons of annual emissions (Xiao et al. 2008; Zhang et al. 2014).
The flotation agent/mineral interaction solution equilibrium flotation process is a complex system involving multi-components. The interaction between the flotation agent and minerals has an important influence on the mineral flotation, which includes the precipitation and complexation of mineral surface ions and flotation reagents, the ...
Dissolved air flotation (DAF) is a widely used treatment process in drinking water and wastewater treatment plants despite high energy cost associated with operation and maintenance (accounts 50% of the total annual operation cost). In recent years, the focus has been diverted to optimizing or reducing energy, and a microbubble generation without a …
It has been demonstrated that natural flotation considerably reduces pollution in wastewater from vegetable oil refineries and subsequently clarifies and purifies the water, effectively separating various organic and metallic contaminants (Kastali et al. 2021a, b; Wang …
However, this mineral processing technique is not a pollution-free process (Lin et al., 2018). The flotation process generates substantial amounts of waste, ... In the traditional flotation process, the pH value of bulk sulfide flotation was maintained in the range of 9–10, while the pH value in the modified flotation process was the natural ...
Combined with the advantages of biosurfactants, flotation could play an important role in oily waters treatment. In this review, our main aim was to show the attractive …
In recent years, the influence of surface physical properties on the hydrophobicity and flotability of minerals has garnered significant attention, revealing a positive correlation between surface roughness and flotation performance. This paper analyzes the effects of roughness on the mineral characteristics and flotation process.
