Adsorptive behaviour of palm oil mill sludge biochar pyrolyzed at low temperature for copper and cadmium removal

Goh, Ching Lam; Sethupathi, Sumathi; Bashir, Mohammed J.K.; Ahmed, Waseem

doi:10.1016/j.jenvman.2018.12.103

Cited by 67 publications

(22 citation statements)

References 25 publications

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“…At the same time, the adsorption amount reaches the maximum, which is 139 mg⋅g −1 . Since then, overdosage can cause aggregation and unsaturation of sorption sites, and the concentration of the Cd(II) becomes the limiting factor . The removal rate goes through a slower growth and the adsorption capacity of the SA−C to Cd(II) declines sharply at a higher dosage.…”

Section: Resultsmentioning

confidence: 99%

High‐Temperature Reduction of Calcium Alginate to Carbon Sphere for Efficient Removal of Bivalent Cadmium

Cheng

Wang

et al. 2019

ChemistrySelect

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A carbon sphere was synthesized by high temperature reduction using alginate as a carbon source. The material was characterized by Fourier transform infrared spectrometer, X-ray diffraction, scanning electron microscopy and energy dispersive analysis. The carbon sphere is reticulated and porous at the microscopic level. For Cd(II) removal experiments, the results showed that the carbon sphere had an excellent effect for the remove of Cd(II), and the adsorption obeyed pseudo-secondorder kinetic model and the Langmuir adsorption isotherm model. The adsorption capacities of Langmuir isotherm were 149, 167, 196 mg⋅g À 1 at 288 K, 298 K and 308 K, respectively. In general, the carbon sphere has a good application prospect for treating cadmium-containing wastewater.

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Section: Resultsmentioning

confidence: 99%

High‐Temperature Reduction of Calcium Alginate to Carbon Sphere for Efficient Removal of Bivalent Cadmium

Cheng

Wang

et al. 2019

ChemistrySelect

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“…AS650 and A-ASBC have higher ash contents (26.52% and 28.76%) because of the enrichment of a large number of inorganic mineral components during high-temperature pyrolysis and base activation (Yuan et al 2011). Compared with AS350, the higher pH value of AS650 was attributed to the degradation of acidic oxygen-containing functional groups in AS at high temperature (Goh et al 2019). A-ASBC had a higher C content and lower H, N, and O contents because of its higher carbonization degree, while H, N, and O escaped from the carbon chain and further formed H 2 O and volatile nitrogen-containing substances, resulting in loss (Tang et al 2018).…”

Section: Physical and Chemical Properties Of Adsorbentmentioning

confidence: 99%

Activated biochar derived from spentAuricularia auriculasubstrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems

Zhang

et al. 2021

Water Science and Technology

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In this study, spent Auricularia auricula substrate (AS)-derived biochar (ASBCs) and activated biochar with NaOH (A-ASBC) were evaluated for the adsorption of cationic azo dyes, including methylene blue (MB), rhodamine B (RB), and crystal violet (CV), from single and binary adsorptive systems. A-ASBC showed a higher maximum adsorption capacity for these dyes (MB: 53.62 mg·g−1, RB: 32.33 mg·g−1, CV: 735.73 mg·g−1) than ASBCs in a single system because it had a greater specific surface area and more oxygen containing-functional groups on the surface. The adsorption process of the three dyes onto the adsorbents was in good agreement with the Freundlich adsorption isotherm and fit the pseudo-second-order kinetic model, which revealed sorbate polymolecular layer formation over the adsorbent surface and the involvement of chemisorption. The adsorption mechanism showed that the adsorption of three dyes on adsorbents could be postulated as a multistep process with extraordinary affinity-induced adsorption in terms of both physisorption and chemisorption. In the binary adsorptive system, the results showed that all MB, RB, and CV had antagonistic/competitive effects on each other's adsorption (QBinary/QSingle < 1). Furthermore, a phytotoxic assay affirmed the effectiveness of the adsorbent in adsorbing dye species from aqueous solutions using Brassica pekinensis L. seeds as the model. Therefore, activated biochar prepared from AS can be used as a potentially economical and effective adsorbent for treating printing and dyeing wastewater.

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“…The FT-IR spectrogram indicates that the microorganisms are successfully loaded on the biochar and that the complex integrates biochar and microbial functional groups, which not only improves the stability but also the removal capacity of the biochar-microbial complex. (Goh et al 2019).…”

Section: Infrared Spectral Analysismentioning

confidence: 99%

Removal of chlortetracycline from water by immobilized Bacillus subtilis on honeysuckle residue derived biochar

Wang

2021

Preprint

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Biochar-immobilized microorganism technology is an effective way to remove antibiotic contamination in aqueous solutions. In this study, the effect and mechanism of immobilization of Bacillus subtilis by honeysuckle residue derived biochar for the removal of chlortetracycline(CTC) were investigated using corn straw biochar as a control. The biochar's structural characteristics and properties were determined using scanning electron microscopy, X-ray diffractometer, Fourier transform infrared spectrometer, specific surface area and pore size analyzer. It was found that honeysuckle residue derived biochar had a well-developed pore structure, which provided adequate living space for microorganisms. The removal rate of CTC (50 mg/L) by honeysuckle residue biochar-microbial complex(HBCM) was 15.31% higher than that of corn straw biochar-microbial complex, indicating that HBCM was an excellent carrier. The mechanism of CTC removal by HBCM was a synergistic effect of biochar adsorption and microbial degradation. The removal process of HBCM material was carried out for 3 days at an optimum substrate concentration of 50 mg/L, ambient temperature of 35°C, solution pH of 7 and the addition of 5 g/L complexes, achieving a removal rate of 78.35%. In addition, the complex possessed high storage stability and could be reused three times continuously and efficiently. This study provides a method for preparing an efficient biochar-microbial complex using Chinese medicine residue waste substrate, which provides a new idea for removing CTC from water.

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Adsorptive behaviour of palm oil mill sludge biochar pyrolyzed at low temperature for copper and cadmium removal

Cited by 67 publications

References 25 publications

High‐Temperature Reduction of Calcium Alginate to Carbon Sphere for Efficient Removal of Bivalent Cadmium

High‐Temperature Reduction of Calcium Alginate to Carbon Sphere for Efficient Removal of Bivalent Cadmium

Activated biochar derived from spentAuricularia auriculasubstrate for the efficient adsorption of cationic azo dyes from single and binary adsorptive systems

Removal of chlortetracycline from water by immobilized Bacillus subtilis on honeysuckle residue derived biochar

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