... aqueous solutions. A Box-Behnken design combined with response surface methodology was employed to model and optimise the adsorption process. The developed quadratic model exhibited excellent statistical performance (R² = 0.9988), confirming the reliability and predictive accuracy...

...Yan Wu; Yuhan Cao; Lijing Wang; Sihong Xia; Xianzhi Fang Cemented soil (CS), a specialised construction material, holds application value in controlling heavy metal ion migration and preventing environmental contamination. This study systematically investigated the adsorption behaviour...

... was characterised using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and thermogravimetric/differential thermal analysis to elucidate its physicochemical and structural features. Batch adsorption experiments were conducted under varying pH levels (2–12), adsorbent doses...

.... Key parameters like porosity and surface area supported the biochar’s strong adsorptive capabilities. This research highlights a sustainable approach by converting sludge waste into an effective treatment medium, offering an eco-friendly solution for both waste disposal and water purification, thus...

... analysed using the Fourier transform infrared spectroscopy, scanning electron microscopy with energy-dispersive X-ray spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller, and Barrett–Joyner–Halenda methods. Optimal fluoride adsorption was achieved at pH 6, 6 g/l adsorbent dose, 240 min contact time...

... 2024 20 12 2024 Emerald Publishing Limited: All rights reserved 2025 adsorption bisphenol A composite materials manganese oxide multiwalled carbon nanotubes nanocomposite nanostructure zebrafish C₀ initial concentration of Bisphenol A (BPA) (mg/l...

... of publications, with China producing 17 096 publications and the USA 4255 publications. Based on the keyword co-occurrence analyses, in the last 5 years, searches on biochar are mainly focused on ‘biochar for adsorption’, ‘Biochar for global warming mitigation’, and ‘Biochar for heavy metals immobilisation...

... the adsorption and degradation efficiency of the organic pollutant 4-nitrophenol (4-NP), both in the absence of light and under visible light irradiation. The nanocomposite material outperformed adsorption in photocatalytic experiments conducted using the Box-Behnken Design (BBD) within response surface...

... (Morocco) was utilised in this investigation to adsorb malachite green (MG) in aqueous solution. The optimisation of parameters associated with adsorption was performed by conducting batch adsorption studies and utilising the response surface approach. The adsorption process was accurately described...

... exhibited a high specific surface area of 444 m²/g, making it a suitable candidate for adsorption, where it provided a higher adsorption capacity. Based on the VSM study, the recorded saturated magnetisation was 15.9 emu/g, which confirmed the viability of easily separating the adsorbent from...

... of chitosan with EDTAD to introduce carboxylic and tertiary amine functional groups, maintaining the secondary amines on the chitosan surface. Such a transformation was important not only to increase the adsorptive potential of chitosan but also to allow C1 to be used in acidic media, thus solving the problem...

... surface area (4.14 m²/g) due to raw material nature and pyrolysis conditions, exhibited a notable ability for mercury (II) adsorption, primarily attributed to the thiol-modified surface. Adsorption was assessed using a 2³ factorial design, with the variables being adsorption time...

... that the kinetic data correlated well with the pseudo-second-order equation. pH values increased slightly after adsorption, and the same trend was observed for total hardness and alkalinity. As a result, the CSBt composite is a promising adsorbent for ammonia nitrogen removal from aquaculture effluents. CS...

... dioxide has a lone electron in its outer orbital, which on illumination, is easily excited to the conduction band in femtoseconds. adsorption band gap catalyst doping nanotechnology organic pollutants photocatalyst UN SDG 6: Clean water and sanitation Although water...

... for the adsorption of Congo red (CR). Adsorption studies were carried out according to the batch adsorption procedure. From the study, the contact time was found to be 40 min and the highest adsorption capacities of 196 and 147 mg/g for PGMA–DETA and PGMA–TEPA were reached, respectively. Isotherm and kinetic...

... the adsorption of MG is better characterised as monolayer adsorption. The maximum adsorption capacity obtained from the Langmuir model is about 22.17 mg/g at 25°C. Kinetic studies indicated the pseudo-second-order model as the most adequate model. It was also revealed that intraparticle diffusion is not the only...

...John Philia, ST, MT; Widayat Widayat, ST, MT, IPM; Sulardjaka Sulardjaka, ST, MT, IPU Organic compounds such as dyes and heavy metal ions are common pollutants in waste water that have become a global problem. Adsorption has proven to be a successful technique in removing organic species...

.... The experimental results showed that a high pH promotes adsorption. The adsorption isotherms are described by the equations of Langmuir and Freundlich isotherms. It is important to note that the quantity of calcium oxide (CaO) corresponding to calcite is higher in natural clay (9.7% by weight) compared to sodium...

... out for sorption kinetics and isotherms. Experimental operating variables studied were pH, contact time at different initial dye concentrations, and biomass dosage. Maximum color removal was observed at pH 2. Adsorption capacity was enhanced by increasing both initial dye concentration and biomass...

... investigated include initial pH, contact time, initial Cr(VI) concentration, and adsorbent dosage. The adsorption of Cr(VI) was found to be maximum at low values of initial pH in the range of 1–3. The adsorption process of Cr(VI) was tested with Langmuir and Freundlich isotherm models. Application...