Biochar for environmental management: Mitigating greenhouse gas emissions, contaminant treatment, and potential negative impacts

Biochar have received multidisciplinary attention because of their extraordinary physicochemical properties. In this review, the application of biochar and biochar-based materials for the efficient elimination of organic and inorganic pollutants are summarized. The sorption of organic chemicals and heavy metal ions/radionuclides, degradation/transformation of organic pollutants, and sorption–reduction–solidification of high-valent metal ions are described in detail. The interaction mechanism at molecular level from advanced spectroscopic techniques and theoretical calculations is discussed. Finally, the challenges in the application of biochar and biochar-supported materials in the immobilization of heavy metal ions and photocatalytic degradation of persistent organic pollutants in soils or wastewater are pointed out. This review is helpful for the graduate students to understand the recent works about biochar and biochar-supported materials in environmental pollutants management.

Efficient elimination of organic and inorganic pollutants by biochar and biochar-based materials

Insights to perfluorooctanoic acid adsorption micro-mechanism over Fe-based metal organic frameworks: Combining computational calculation with response surface methodology

Preparation of acrylamide/acrylic acid cellulose hydrogels for the adsorption of heavy metal ions.

Sorption properties of cadmium on microplastics: The common practice experiment and A two-dimensional correlation spectroscopic study

Classical theory and electron-scale view of exceptional Cd(II) adsorption onto mesoporous cellulose biochar via experimental analysis coupled with DFT calculations

Insights into sulfamethazine adsorption interfacial interaction mechanism on mesoporous cellulose biochar: Coupling DFT/FOT simulations with experiments

Heavy metal pollution in farmland soil reduces crop yield and quality and also potentially causes the crisis to human health. Formerly, the fact that silicon fertilizer could effectively reduce the residual concentration of heavy metal in crops has been identified at the tissue level. In this paper, molecular dynamics simulation was employed to investigate the effects of the degree of silicification of silicic acids [namely, the molar ratio of Si(OH)4 and SiO2] on the Cd(II) bound in the aspect of radial distribution functions and mean square displacements. The results demonstrated that Si(OH)4 attracted Cd(II) through the coordination, while SiO2 attracted Cd(II) by the adsorption. In particular, when the degree of silicification was 0, both the bound Cd(II) amount and strength were the maximum value, indicating that the silicon fertilizer had the best efficiency of Cd(II) bound as Si(OH)4. By comparing the adsorption energy and electronic transfer of Cd(II) and Si(OH)4 adsorption onto the SiO2 surface through the quantum chemical simulation, we concluded that Cd(II) adsorption onto the SiO2 surface was chemisorption, while the Si(OH)4 adsorption onto SiO2 surface was physisorption. Consequently, the adsorption capacity of Cd(II) on the SiO2 surface was higher than that of Si(OH)4 adsorption on the SiO2 surface. Moreover, the compact hydration layers around Cd(II) prevented the process of Cd(II) adsorption on the SiO2 surface; even so, the counterion Cl- in the system promoted the adsorption process. The mechanism of silicon fertilizer binding heavy metal Cd(II) was investigated and revealed at the molecular and electronic level. This work has expanded the possibility of theoretical guidance for the design of silicon fertilizer.

Effect of Degree of Silicification on Silica/Silicic Acid Binding Cd(II) and Its Mechanism

The invention belongs to the technical field of biomass resource reuse and new environmental functional materials, and especially relates to a cellulose modified activated carbon heavy metal adsorption material (CAC-NA), a preparation method thereof, and an application thereof in the fields of environmental treatment and restoration, especially the restoration of heavy metal pollution, such as the heavy metal adsorption field The preparation method comprises the following steps: (1) heating cellulose in nitrogen atmosphere to carbonize the cellulose in order obtain cellulose charcoal; (2) mixing the cellulose carbon with a strong alkali and water, drying the obtained mixture to obtain cellulose activated carbon-alkali, and heating the cellulose activated carbon-alkali to obtain cellulose activated carbon; and (3) mixing the cellulose activated carbon with concentrated nitric acid, carrying out a heating and stirring reaction, and filtering, washing and drying the obtained reaction product to obtain the cellulose modified activated carbon heavy metal adsorption material The cellulose modified activated carbon heavy metal adsorption material has the characteristics of high adsorption rate, high adsorption capacity and high removal rate, the heavy metal cadmium adsorption capacity of the material reaches 368 mg/g, and the material is a heavy metal adsorbent having excellent performances

Cellulose modified activated carbon heavy metal adsorption material, and preparation method and application thereof

The invention belongs to the technical field of biological resource reutilization and discloses a modified cellulose derivative adsorbing material for adsorbing heavy metal, a preparation method thereof and application in the field of heavy metal adsorption The modified cellulose derivative adsorbing material for adsorbing the heavy metal disclosed by the invention is characterized by having a structure shown by a following formula (1) in the description The invention further provides the preparation method The preparation method comprises the steps: utilizing amino of triethylene tetramine to react with hydroxyl of N-hydroxymethyl acrylamide and introducing secondary amino and acylamino; then reacting with carbon disulfide and introducing carbonyl sulfide; through a solution polymerizing mode with cellulose and acrylic acid, obtaining final cellulose modified derivative The adsorbing material disclosed by the invention takes physical adsorption, chemical adsorption and electrostatic adsorption in an adsorbing process into consideration, the adsorption rate capacity and removing rate are high, further the adsorbing material has wide applicability to heavy metal adsorption, adsorption capacity of the adsorbing material to heavy metal cadmium can reach 400mg/g, and the adsorbing material is a heavy metal adsorbent with excellent performance

Modified cellulose derivative adsorbing material for adsorbing heavy metal and preparation method and application thereof

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