Micro-nano-engineered nitrogenous bone biochar developed with a ball-milling technique for high-efficiency removal of aquatic Cd(II), Cu(II) and Pb(II)

Xiao, Jiang; Hu, Rui; Chen, Guangcai

doi:10.1016/j.jhazmat.2019.121980

Cited by 200 publications

(79 citation statements)

References 74 publications

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“…Recent studies have been demonstrated the use of biochar for water treatment and purification have gained a lot of attention. [58] indicated that micro-nano-engineered nitrogenous cow bone biochar (pyrolysed at 600 °C) was created which was able to adsorb 165.7, 287.6 and 558.9 mg/g of Cd(II), Cu(II), and Pb from water, respectively. Also a different study demonstrated the adsorption of ammonium from water using ball mining bamboo biochar where the adsorption was even more than three folds as compared to pristine biochar (7.0 vs. 22.9 mg/g) [59].…”

Section: Role Of Biochar In Pollution Managementmentioning

confidence: 99%

Sustainable Use of Biochar in Environmental Management

Abukari¹,

Imoro²,

Imoro³

et al. 2021

Environmental Health

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Conversion of agricultural wastes into eco-friendly and low cost biochar is not only a smart recycling strategy but a panacea to environmental pollution management. Agricultural wastes biochar can be an effective alternative technique for controlling contaminants due to its low cost, high-efficiency, simple to use, ecological sustainability and reliability in terms of public safety. Biochars have made substantial breakthroughs in reducing greenhouse gases emissions, reducing soil nutrient leaching, sequester atmospheric carbon into the soil, increasing agricultural productivity, and reducing bioavailability of environmental contaminants. Recent advances in the understanding of biochars warrant a proper scientific evaluation of the relationship between its properties and impact on soil properties, environmental pollutant remediation, plant growth, yield, and resistance to biotic and abiotic stresses. The main factors controlling biochar properties include the nature of feedstock, heat transfer rate, residence time and pyrolysis temperature. Biochar efficacy in pollutants management largely depends on its elemental composition, ion-exchange capacity, pore size distribution and surface area, which vary with the nature of feedstock, preparation conditions and procedures. The chapter explored the possibility of using biochar from agricultural wastes as a suitable alternative for the remediation of environmental pollutants, soil conditioning and the long-term biochar application in the environment.

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Section: Role Of Biochar In Pollution Managementmentioning

confidence: 99%

Sustainable Use of Biochar in Environmental Management

Abukari¹,

Imoro²,

Imoro³

et al. 2021

Environmental Health

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“…When the solution was at a low pH, the surfaces of the biochars were positively charged, which would cause the electrostatic repulsion of the heavy metal ions, thereby reducing the adsorption capacity of the biochars [48,49]. However, with the rise of pH, the biochars were less protonated, thereby increasing their negative charge on the surfaces and promoting its capacity for adsorption of the heavy metals [50,51]. When the Cu 2+ and Pb 2+ solutions had a pH = 6, and the Cd 2+ solution had a pH = 7, precipitation occured in the solution.…”

Section: The Effect Of Phmentioning

confidence: 99%

A Novel Manganese-Rich Pokeweed Biochar for Highly Efficient Adsorption of Heavy Metals from Wastewater: Performance, Mechanisms, and Potential Risk Analysis

Yang

Yao

et al. 2021

Processes

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A novel manganese-rich pokeweed biochar was prepared at different temperatures from manganese-rich pokeweed plants collected at manganese tailings, resulting in materials identified as BC300, BC400, and BC500. The synthetized biochar materials were investigated as regards their potential for removing Cu2+, Pb2+, and Cd2+, specifically in terms of adsorption performances, adsorption kinetics, adsorption isotherms, and potential environmental pollution risk. The results showed that the sorption process fitted well to the pseudo-second-order kinetic and Langmuir models, and the maximum adsorption capacities of BC500 were 246, 326, and 310 mg·g−1 for Cu2+, Pb2+, and Cd2+ respectively. The physicochemical characteristics of the biochars, and the adsorption mechanisms, were revealed by using scanning electron microscopy-energy spectrometer, elemental analysis, Brunauer–Emmett–Teller techniques, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The sorption mechanism of these three heavy metal ions onto biochars included ion exchange, electrostatic adsorption, chemical adsorption, and precipitation. Besides, the potential pollution risk of manganese-rich pokeweed biochars was significantly reduced after pyrolysis. Therefore, it is feasible to transform manganese-rich pokeweed biomass into manganese-rich pokeweed biochar with potential for heavy metals removal, showing high adsorption capacity, recyclability, and low environmental pollution.

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“…Taking Pb(II) adsorbed by BC as an example, the contribution of these four mechanisms was different because the BC was prepared from multiple sources at different temperatures. For the largest contribution, most of the researchers believed that the dominant mechanism was precipitation which accounted for 70.36-89.03% (Wu et al, 2019;Xiao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Insight of Biochar-layered Double Hydroxide Composite for Efficient Removal of Aqueous Pb(II) and Cu(II)

Chen

et al. 2021

Preprint

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To explore the heavy metal adsorption mechanisms by biochar-based materials, MgAl-layered double hydroxide (MgAl-LDH) was loaded on a commercial coconut shell biochar (BC) to obtain the composite (BC-LDH) for adsorptive decontamination of Pb(II) and Cu(II) in water. The removal capacities of BC-LDH (294 and 38.6 mg/g) was higher than BC (13.3 and 11.4 mg/g) and LDH (126 and 22.7 mg/g) for aqueous Pb(II) and Cu(II). The pseudo-second-order equation and the Langmuir model could better illustrate the adsorption process, respectively. The interaction mechanisms between BC-LDH and heavy metals were classified as mineral precipitation (Qpre), cation exchange and isomorphic replacement (Qexc), electrostatic attraction (Qele), and surface complexation (Qcom) according to the characterization results. The quantitative analysis indicated that the contributions of the above mechanisms of BC-LDH for Pb(II) and Cu(II) followed the order of Qpre > Qele > Qexc and Qpre > Qexc > Qele, respectively. Compared with BC, the Qpre increased and Qele decreased significantly, certified the combination of BC and LDH provided a kind of viable composite in heavy metal wastewater treatment.

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Micro-nano-engineered nitrogenous bone biochar developed with a ball-milling technique for high-efficiency removal of aquatic Cd(II), Cu(II) and Pb(II)

Cited by 200 publications

References 74 publications

Sustainable Use of Biochar in Environmental Management

Sustainable Use of Biochar in Environmental Management

A Novel Manganese-Rich Pokeweed Biochar for Highly Efficient Adsorption of Heavy Metals from Wastewater: Performance, Mechanisms, and Potential Risk Analysis

Mechanistic Insight of Biochar-layered Double Hydroxide Composite for Efficient Removal of Aqueous Pb(II) and Cu(II)

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