Preparation and Characterization of Macroalgae Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability

Zhou, Yarui; Zhang, Hailong; Cai, Lu; Guo, Jingjie; Wang, Yaning; Ji, Lili; Song, Wen‐Dong

doi:10.3390/ma11091709

Cited by 46 publications

(33 citation statements)

References 44 publications

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“…This is why, the parameters of the pseudo-second order model were used for the description and comparison of biosorption properties of Cladophora glomerata biochar. These results are in line with the data presented by Zhou et al (2018), who used the pseudo-first and pseudo-second order model for the description of biosorption kinetics of dyes (methylene blue) by biochar produced from waste kelp. It was shown that adsorption kinetics fitted well with a pseudo-second order model [12].…”

Section: Biosorption Properties Of Biocharssupporting

confidence: 91%

“…These results are in line with the data presented by Zhou et al (2018), who used the pseudo-first and pseudo-second order model for the description of biosorption kinetics of dyes (methylene blue) by biochar produced from waste kelp. It was shown that adsorption kinetics fitted well with a pseudo-second order model [12]. It was similar in the case of the sorption of Remazol dyes by biochar from green seaweed Ulva lactuca [37].…”

Section: Biosorption Properties Of Biocharssupporting

confidence: 91%

“…This characteristic decides about the potential applications of biochar. Available literature confirms that biochars produced from bio-waste, due to their properties-such as porous structure, high specific surface area and abundant functional groups, have been widely used to remove toxic metals from wastewater [6,8,12,14,30].…”

Section: Resultsmentioning

confidence: 99%

“…Scanning electron microscopy was employed to investigate the microstructure and morphology of the samples. This technique is quite often used for the examination of algal biochar [6,8,12,14]. SEM images of raw algal biomass and the resultant biochar produced at 450 • C (as an example) are presented in Figure 2.…”

Section: Scanning Electron Microscopy Of a Raw Alga And The Resultantmentioning

confidence: 99%

“…All samples were characterized by a comparable median pore diameter of about 7.3 nm. Zhou et al (2018) showed that biochar from waste kelp after modification with KOH contained a large number of pores with an average diameter of 200-300 nm [12].…”

Section: Mercury Porosimetrymentioning

confidence: 99%

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Biochar from A Freshwater Macroalga as A Potential Biosorbent for Wastewater Treatment

Michalak

Baśladyńska

Mokrzycki

et al. 2019

Water

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The multi-elemental composition, surface texture and morphology of biochar, produced by pyrolysis at 300, 350, 400 and 450 °C from freshwater macroalga Cladophora glomerata, as a biosorbent of toxic metals was examined with Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), Scanning Electron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FT-IR) techniques. It was found that the yield of pyrolysis was inversely proportional to temperature: for 300 °C it was 63%, whereas for 450 °C—47%. The proximate analysis revealed that also biochar’s moisture and volatile matter was inversely proportional to temperature. The content of ash increased with temperature. All biochars were characterized by a similar total pore area of about 20 m2 g−1. FT-IR analysis showed that all biochars peaked at 3500–3100 cm−1 which was attributed to O–H stretching of the hydroxyl groups, at 2850–2970 cm−1, stretching vibrations of C–H bonds in aliphatic CH2 and CH groups, at 1605 cm−1, stretching vibrations from C=C of aromatics, at 1420 cm−1, bending oscillations from CH2, at about 1111 cm−1, stretching vibrations of Si–O, at 618 cm−1, vibrations from Fe–O bonds, and at 475 cm−1—Si–O–Si deformation vibrations. The biosorption properties of biochar towards Cr(III) ions were examined in kinetic studies. The biosorption capacity of biochar increased with an increase of pyrolysis temperature: the highest was for biochar obtained at 450 °C—87.1 mg Cr(III) g−1 and the lowest at 300 °C—45.9 mg g−1. Cladophora biochar also demonstrated a good ability to simultaneously remove metal ions from a multi-metal system, e.g., wastewater. The removal efficiency for Cr(III) was 89.9%, for Cu(II) 97.1% and for Zn(II) 93.7%. The biochar derived from waste-freshwater macroalgae can be a potent and eco-friendly alternative adsorptive material.

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Section: Biosorption Properties Of Biocharssupporting

confidence: 91%

Section: Biosorption Properties Of Biocharssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Scanning Electron Microscopy Of a Raw Alga And The Resultantmentioning

confidence: 99%

Section: Mercury Porosimetrymentioning

confidence: 99%

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Biochar from A Freshwater Macroalga as A Potential Biosorbent for Wastewater Treatment

Michalak

Baśladyńska

Mokrzycki

et al. 2019

Water

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A comparative study on synthesis and characterization of biochars derived from lignocellulosic biomass for their candidacy in agronomy and energy applications

et al. 2020

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Summary This study has dealt with the synthesis and characterization of biochars produced from three biomasses, viz. water hyacinth (whole plant and its components), yellow oleander, and sugarcane bagasse, and their comparative assessment for potential application in agronomy and energy production. The pyrolysis was carried out in a fixed batch reactor at 350°C and 550°C with a heating rate of 20°Cmin−1. Biochars were characterized for proximate and ultimate (elemental) analysis, and also using standard techniques (SEM, EDX, TGA, BET, XRD, and FTIR). Biochars produced at 550°C from all the feedstock had good properties (carbon content: 39.09‐80.74%, pH: 7.36‐10.42, calorific value: 16.98‐30.18 MJ kg−1, and ash content: 0.89%‐21.78%). Moreover, relatively low atomic ratios (H/C 0.25‐0.47 and O/C 0.15‐1.11) of all biochars indicated their potential as solid fuel. XRD results showed the presence of amorphous and crystalline structures, and minerals like sylivite, quartz, kalsilite, and tridymite in the biochar. Biochar produced from sugarcane bagasse at 550°C possessed the best properties: fixed carbon (77.42%), bulk density (0.13 kg/m3), brunauer–emmett–teller (BET) surface area (17.78 m2/g), pore size (12.86 nm), total pore volume (0.025 cm3/g), calorific value (30.18 MJ kg−1), ash content (1.16%), and moisture content (2.03%).

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Green Photocatalytic Degradation of Industrial Effluent using CFN‐800 as a Visible Light Photocatalyst

Kaur,

Gupta,

Singh

et al. 2023

ChemistrySelect

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In the present study, the synthesis of CFN‐800 photocatalyst (CdFe2O4, nanoparticles calcinated at 800 °C) has been achieved using ACM (auto‐combustion method). The confirmation of the formation of the CFN‐800 photocatalyst was done by using different characterization techniques such as FT‐IR, UV‐Vis, XRD, and SEM. Further, under environmental application, synthesized nanoparticles were utilized for the green photocatalytic degradation of industrial effluent Brilliant Blue FCF (BBF) in aqueous media using sunlight as a natural source of light. The degradation experiment was examined by using a UV‐vis spectrophotometer. Various parameters such as the amount of CFN‐800 photocatalyst (g), the concentration of dye (ppm), the amount of dye (ml), and the pH level (1–11) were analyzed to find the more efficient results in terms of % degradation of BBF dye solution. By experiments, the results found were that the photodegradation of BBF touched to 93 % in 100 min. with 0.010 g of CFN‐800 photocatalyst and 10 ppm dye solution (10 ml) at 5 pH. In addition, the prepared CFN‐800 photocatalyst showed excellent performance in recyclability. Even after recycling for up to four consecutive cycles, no significant decrease in the degrading efficiency of CFN‐800 was observed.

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Preparation and Characterization of Macroalgae Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability

Cited by 46 publications

References 44 publications

Biochar from A Freshwater Macroalga as A Potential Biosorbent for Wastewater Treatment

Biochar from A Freshwater Macroalga as A Potential Biosorbent for Wastewater Treatment

A comparative study on synthesis and characterization of biochars derived from lignocellulosic biomass for their candidacy in agronomy and energy applications

Green Photocatalytic Degradation of Industrial Effluent using CFN‐800 as a Visible Light Photocatalyst

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