Microalgae-derived nanoporous biochar for ammonia removal in sustainable wastewater treatment

Zhang, Xixia; Kaštyl, Jaroslav; Casas-Luna, Mariano; Havlíček, Lubomír; Vondra, Marek; Brummer, Vladimír; Sukačová, Kateřina; Máša, Vítězslav; Teng, Sin Yong; Neugebauer, Petr

doi:10.1016/j.jece.2022.108514

Cited by 8 publications

(5 citation statements)

References 99 publications

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“…66,67 Other binding energy peaks, such as C 1s, O 1s, and N 1s, are due to the presence of functional groups on the surface of the ZnS-GT QDs. The presence of C-C, C-O, CQO, COO-, C-OH, N-O, N-pyrrolic (N-Pr), N-pyridinic and N-O functionals are confirmed from the deconvoluted spectra of C 1s 68 (Fig. S6d, ESI †), O 1s 68 (Fig.…”

Section: Characterization Of Biosynthesized Zns Qdsmentioning

confidence: 84%

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Formation of ZnS quantum dots using green tea extract: applications to protein binding, bio-sensing, anti-bacterial and cell cytotoxicity studies

et al. 2023

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Section: Characterization Of Biosynthesized Zns Qdsmentioning

confidence: 84%

“…The presence of C-C, C-O, CQO, COO-, C-OH, N-O, N-pyrrolic (N-Pr), N-pyridinic and N-O functionals are confirmed from the deconvoluted spectra of C 1s 68 (Fig. S6d, ESI †), O 1s 68 (Fig. S6e, ESI †), and N 1s 69 (Fig.…”

Section: Characterization Of Biosynthesized Zns Qdsmentioning

confidence: 87%

Formation of ZnS quantum dots using green tea extract: applications to protein binding, bio-sensing, anti-bacterial and cell cytotoxicity studies

et al. 2023

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“…These groups are important in removing a number of pollutants, through co-precipitation or complexation processes, from the soil or an aqueous medium [ 31 ], and adsorbing extra nutrients that are available in the soil after fertilization or organic matter decomposition [ 25 , 32 , 33 ]. For example, oxygen-containing groups on nanoB’s surface ( Figure 1 B) have been shown to provide suitable sites for NH 4 + and NH 3 adsorption [ 34 ], thereby increasing their availability in the soil for crop growth improvement [ 35 ]. Hence, nanobiochar addition in the soil would help to reduce nutrient losses and retain the nutrient in the soil, so that it might be available to the crop when required.…”

Section: Discussionmentioning

confidence: 99%

Nanobiochar and Copper Oxide Nanoparticles Mixture Synergistically Increases Soil Nutrient Availability and Improves Wheat Production

Rashid

Shah

Sadiq

et al. 2023

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Recently, nanomaterials have received considerable attention in the agricultural sector, due to their distinctive characteristics such as small size, high surface area to volume ratio, and charged surface. These properties allow nanomaterials to be utilized as nanofertilizers, that can improve crop nutrient management and reduce environmental nutrient losses. However, after soil application, metallic nanoparticles have been shown to be toxic to soil biota and their associated ecosystem services. The organic nature of nanobiochar (nanoB) may help to overcome this toxicity while maintaining all the beneficial effects of nanomaterials. We aimed to synthesize nanoB from goat manure and utilize it with CuO nanoparticles (nanoCu) to influence soil microbes, nutrient content, and wheat productivity. An X-ray diffractogram (XRD) confirmed nanoB synthesis (crystal size = 20 nm). The XRD spectrum showed a distinct carbon peak at 2θ = 42.9°. Fourier-transform spectroscopy of nanoB’s surface indicated the presence of C=O, C≡N–R, and C=C bonds, and other functional groups. The electron microscopic micrographs of nanoB showed cubical, pentagonal, needle, and spherical shapes. NanoB and nanoCu were applied alone and as a mixture at the rate of 1000 mg kg−1 soil, to pots where wheat crop was grown. NanoCu did not influence any soil or plant parameters except soil Cu content and plant Cu uptake. The soil and wheat Cu content in the nanoCu treatment were 146 and 91% higher, respectively, than in the control. NanoB increased microbial biomass N, mineral N, and plant available P by 57, 28, and 64%, respectively, compared to the control. The mixture of nanoB and nanoCu further increased these parameters, by 61, 18, and 38%, compared to nanoB or nanoCu alone. Consequently, wheat biological, grain yields, and N uptake were 35, 62 and 80% higher in the nanoB+nanoCu treatment compared to the control. NanoB further increased wheat Cu uptake by 37% in the nanoB+nanoCu treatment compared to the nanoCu alone. Hence, nanoB alone, or in a mixture with nanoCu, enhanced soil microbial activity, nutrient content, and wheat production. NanoB also increased wheat Cu uptake when mixed with nanoCu, a micronutrient essential for seed and chlorophyll production. Therefore, a mixture of nanobiochar and nanoCu would be recommended to farmers for improving their clayey loam soil quality and increasing Cu uptake and crop productivity in such agroecosystems.

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“…8,9 However, the as-produced microalgal biochar is basically a direct conversion from cells or pigment-extracted residues without the cascade utilization process, and many of the residual components (e.g., proteins and polysaccharides) are lost through high-temperature pyrolysis, which does not meet economic feasibility. 10,11 Gratifyingly, owing to the considerable amounts of energy-rich components that still exist in the pigment-extracted microalgal residues, anaerobic microbes can efficiently convert them to CH 4 through a simple operation process with high conversion rate and energy yield, 12,13 and this process can be set between pigment extraction and biochar production to achieve the cascade utilization of microalgae. However, only employing Chlorella residue with anaerobic fermentation might lead to an unsatisfactory conversion efficiency since the original nutrient composition in the fermenter may be unbalanced.…”

Section: Introductionmentioning

confidence: 99%

“…Chlorella cells are rich in chlorophyll and lutein, which can frequently be utilized as raw materials in producing the natural pigments with high-added value. , Nevertheless, the process of pigment extraction inevitably produces a large amount of waste Chlorella residue, and developing a reasonable disposal process to deal with these residues and to even collect the remaining resources from them is of great importance. As reported, high-temperature pyrolysis can efficiently convert microalgae to functional biochar toward energy or environmental prospects. , However, the as-produced microalgal biochar is basically a direct conversion from cells or pigment-extracted residues without the cascade utilization process, and many of the residual components (e.g., proteins and polysaccharides) are lost through high-temperature pyrolysis, which does not meet economic feasibility. , Gratifyingly, owing to the considerable amounts of energy-rich components that still exist in the pigment-extracted microalgal residues, anaerobic microbes can efficiently convert them to CH 4 through a simple operation process with high conversion rate and energy yield, , and this process can be set between pigment extraction and biochar production to achieve the cascade utilization of microalgae. However, only employing Chlorella residue with anaerobic fermentation might lead to an unsatisfactory conversion efficiency since the original nutrient composition in the fermenter may be unbalanced.…”

Section: Introductionmentioning

confidence: 99%

Tailored a Multiple Tandem Reaction System for Microalga Cascade Utilization

et al. 2023

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Integrating multiple systems to achieve cascade utilization of microalgae is an advanced biorefinery prospect that can better deal with biowaste disposal. Unfortunately, the current implementations have not explored an efficient and feasible route for Chlorella cascade resource utilization. Here, a multiple tandem reaction system was imaginatively constructed in this investigation for the first time to achieve efficient utilization of Chlorella at different process stages. The system consists of (i) a pigments extraction module, (ii) an anaerobic fermentation module, and (iii) an advanced oxidation processes module. Specifically, the high-valued pigments [chlorophyll (a–b)] were first extracted from Chlorella. Then, the sludge was mixed with pigment-extracted Chlorella residue for anaerobic Co-fermentation to produce methane (CH4). Ultimately, the fermentation residue was calcined at a high temperature and doped with nonmetal (boron)–metal (cobalt) to obtain a recyclable biochar (B,Co-SBC) catalyst. The different modules work in concert with each other to maintain the stable operation of the tandem reaction system. Together, the multiple tandem reaction system proposed in this study can add a new technology library for resource utilization as well as provide a valuable reference for water remediation.

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Microalgae-derived nanoporous biochar for ammonia removal in sustainable wastewater treatment

Cited by 8 publications

References 99 publications

Formation of ZnS quantum dots using green tea extract: applications to protein binding, bio-sensing, anti-bacterial and cell cytotoxicity studies

Formation of ZnS quantum dots using green tea extract: applications to protein binding, bio-sensing, anti-bacterial and cell cytotoxicity studies

Nanobiochar and Copper Oxide Nanoparticles Mixture Synergistically Increases Soil Nutrient Availability and Improves Wheat Production

Tailored a Multiple Tandem Reaction System for Microalga Cascade Utilization

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