4 research outputs found
Cotton Fiber and Carbon Materials Filters for Efficient Wastewater Purification
Carbon
materials and cotton fibers (CFs) are eco-friendly and cost-effective solutions
for water purification. However, enhancing the filtration efficiency of these
materials remains challenging. In this study, the capacity of heat-treated
sorbents (CFs and low-temperature graphite intercalation compounds (LT-GICs))
to improve the efficiency of wastewater purification from heavy metals and
petroleum compounds, was investigated. The properties of the thermally modified
CFs were studied in order to obtain a material which is highly efficient in
purifying wastewater from heavy metal ions (HMIs). The duration of sorption
equilibrium and the optimal ratio of heat-treated cotton fibers (HTCFs) and
wastewater were determined. The adsorption capacities of CFs for iodine and
methylene blue were determined before and after the heat treatment.
Experimental results indicated that thermal treatment of CFs resulted in
increased numbers of micropores and mesopores, indicating a high sorption
capacity for petroleum products (PPs) in wastewater (A = 11.5 g/g) with an
efficiency score of 90%. Furthermore, LT-GIC/CF composite filters were
optimized for efficient purification. The results indicated that a filter with
a composition of 1 g LT-GIC + 3 g CF had the highest sorption capacity for HMIs
(28.7 mg/g) and PPs (80.6%) due to its looser surface structure. The X-ray
phase analysis of the sintered composite filters showed the presence of carbon
in the amorphous phase, which had a similar structure to the activated carbon
from black coal. In summary, the high sorption capacities and simple
preparation processes of LT-GIC/CF composites make them potential candidates
for wastewater purification
Sorption properties of materials based on residual biomass
In this paper, we consider the possibility of using inexpensive and effective sorption materials based on plant raw materials, such as fruit rind, vegetable waste, fallen leaves, and the use of phytosorbents for the purification of sewage containing heavy metals and petroleum products. The use of vegetable waste for the manufacture of sorbents is a priority for solving environmental problems. It is suggested to use residual biomass as a sorption material, which is formed after extraction of lipids from C. sorokiniana microalgae and duckweed Lemna minor. To increase the sorption capacity, it was proposed to thermally modify the residual biomass. The optimum heat treatment conditions were 450 °C for 20 minutes with limited access to oxygen. The obtained biomass allows one to extract ions of heavy metals with efficiency of 91-93% for ions of lead, cadmium, zinc and copper.
To increase the sorption capacity (A, mg/g) of the residual biomass, heat treated waste from the agro-industrial complex and chitosan were proposed as additives. The addition of chitosan makes it possible to obtain a sorption material in the form of granules, which is convenient to use. For the sorption materials obtained, microstructural studies were carried out, which allowed us to substantiate the sorption properties of the materials. The physical and mechanical properties of sorbents, such as abrasion, grindability, allow us to offer new materials for use on an industrial scale. In the article, a technological scheme for obtaining sorption materials from residual biomass is given
Sorption properties of materials based on residual biomass
In this paper, we consider the possibility of using inexpensive and effective sorption materials based on plant raw materials, such as fruit rind, vegetable waste, fallen leaves, and the use of phytosorbents for the purification of sewage containing heavy metals and petroleum products. The use of vegetable waste for the manufacture of sorbents is a priority for solving environmental problems. It is suggested to use residual biomass as a sorption material, which is formed after extraction of lipids from C. sorokiniana microalgae and duckweed Lemna minor. To increase the sorption capacity, it was proposed to thermally modify the residual biomass. The optimum heat treatment conditions were 450 °C for 20 minutes with limited access to oxygen. The obtained biomass allows one to extract ions of heavy metals with efficiency of 91-93% for ions of lead, cadmium, zinc and copper. To increase the sorption capacity (A, mg/g) of the residual biomass, heat treated waste from the agro-industrial complex and chitosan were proposed as additives. The addition of chitosan makes it possible to obtain a sorption material in the form of granules, which is convenient to use. For the sorption materials obtained, microstructural studies were carried out, which allowed us to substantiate the sorption properties of the materials. The physical and mechanical properties of sorbents, such as abrasion, grindability, allow us to offer new materials for use on an industrial scale. In the article, a technological scheme for obtaining sorption materials from residual biomass is given
Sorption properties of materials based on residual biomass
In this paper, we consider the possibility of using inexpensive and effective sorption materials based on plant raw materials, such as fruit rind, vegetable waste, fallen leaves, and the use of phytosorbents for the purification of sewage containing heavy metals and petroleum products. The use of vegetable waste for the manufacture of sorbents is a priority for solving environmental problems. It is suggested to use residual biomass as a sorption material, which is formed after extraction of lipids from C. sorokiniana microalgae and duckweed Lemna minor. To increase the sorption capacity, it was proposed to thermally modify the residual biomass. The optimum heat treatment conditions were 450 °C for 20 minutes with limited access to oxygen. The obtained biomass allows one to extract ions of heavy metals with efficiency of 91-93% for ions of lead, cadmium, zinc and copper.
To increase the sorption capacity (A, mg/g) of the residual biomass, heat treated waste from the agro-industrial complex and chitosan were proposed as additives. The addition of chitosan makes it possible to obtain a sorption material in the form of granules, which is convenient to use. For the sorption materials obtained, microstructural studies were carried out, which allowed us to substantiate the sorption properties of the materials. The physical and mechanical properties of sorbents, such as abrasion, grindability, allow us to offer new materials for use on an industrial scale. In the article, a technological scheme for obtaining sorption materials from residual biomass is given