Preparation of rice straw-derived biochar for efficient cadmium removal by modification of oxygen-containing functional groups

Zhang, Huiyan; Yue, Xiupeng; Li, Fēi; Xiao, Rui; Zhang, Yaping; Gu, Dongqing

doi:10.1016/j.scitotenv.2018.03.071

Cited by 144 publications

(37 citation statements)

References 42 publications

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“…In spectra for RSB4 in Fig. 1, 1672 cm −1 : strains C=C of aromatic rings, 1432 cm −1 : O-H groups (carboxyl) and C-H, 1251 cm −1 : C-O strain with characteristics of oxygenated functional groups (present in Cellulose), 893-782 cm −1 : C-H with aromatic groups 48,49 , 572: inorganic metals like K and Ca. Spectra from Fig.…”

Section: Characteristic Animal Manuresmentioning

confidence: 98%

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Sarfaraz

Silva

Drescher

et al. 2020

Sci Rep

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Renewing carbon and re-establishing it again in the soil is one of the valuable means to cope with climate change. there are many technologies for carbon apprehension and storage, but the most important one gaining attention is biochar technology. So, to carbonize and return different biological materials back to the farmland, a comprehensive study was proposed to characterize and evaluate the carbon (C) mineralization of biochars produced from different animal manures and crop straws. Six types of biochars were prepared from animal manures (poultry litter, swine and cattle manures) and crop straws (rice, soybean, and corn straws). the biochars were analyzed for chemical characteristics (elemental variables, thermal decomposition, cation exchange capacity, pH, electrical conductivity, specific surface area, and surface functional groups) and an incubation experiment was conducted to evaluate C mineralization from soil biochar mixture. Biochars produced from crop straws resulted to have more c as compared to the biochars produced from animal manures. concentration of nitrogen was low, while P, K, Ca, and Mg were found reasonably higher in all biochars except swine manure biochar. the plant-derived biochars presented lower co 2 emissions when incorporated to soil at 1 and 2% of C. Varying but all the biochars prepared represented an alkaline pH. Biochars prepared from the crop straws resulted to have more c, alkaline in nature, high cec, low co 2 emissions, can sequester C and more suitable to enhance the soil fertility in comparison to biochars produced from other sources. In the Southern region of Brazil can be found immense amounts of diverse animal manure and plant residues as the region have a massive number of animal farms and crop production. Swine and poultry farms are the principal sources of the manure produced in the region. Rice is cultivated on about 1,000 M ha area 1 , while soybean and corn are also major crops grown in the region (more than 6,000 M ha area) 2. In the region, no-tillage planting system is used to grow crops for a long time, and crop straws are left on the surface at the time of harvesting. There may be noted an uneven decomposition of these organic materials and different environmental impacts can be noticed, such as releasing carbon dioxide (CO 2) into the atmosphere and N can be immobilized by microorganisms or can be escaped into the atmosphere in the form of N 2 O, N 2 and NH 3. Biochar is an alternative and beneficial strategy to dispose-off the animal manures and plant residues rather than keeping them on the place or applying to soil directly 3. Biochar is a solid C rich material obtained from organic waste burning in the absence or low supply of oxygen 4. A massive amount of different biomasses can be found to produce biochars such as animal manures, plant residues, sewage sludge, and agricultural wastes. Its production from different residues and wastes for the use of farm soils may be a valuable means to decrease the negative impacts of emissions (greenhouse gases) from the...

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Section: Characteristic Animal Manuresmentioning

confidence: 98%

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Sarfaraz

Silva

Drescher

et al. 2020

Sci Rep

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“…This is consistent with the findings of Zhang et al . 20 . During the first 240 min, Cd(II) in the solution was rapidly adsorbed by the four adsorbents.…”

Section: Resultsmentioning

confidence: 99%

“…Zhang et al . 20 showed that the biochar modified with H 2 O 2 -HNO 3 was more effective in removing Cd(II) from water than the rice straw-derived biochar. Feng et al .…”

Section: Introductionmentioning

confidence: 99%

Characterization and Interpretation of Cd (II) Adsorption by Different Modified Rice Straws under Contrasting Conditions

Wang

Yao

et al. 2019

Sci Rep

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Rice straw can adsorb Cd(II) from wastewater, and modification of rice straw may improve its adsorption efficiency. The rice straw powder (Sp) from the direct pulverization of rice straw was used as the control, the rice straw ash (Sa), biochar (Sa), and modified rice straw (Ms) were prepared by ashing, pyrolysis and citric acid modification, respectively, and all of them were examined as adsorbents for Cd(II) in this study. Batch adsorption experiments were adopted to systematically compare the adsorption capacities of rice straw materials prepared with different modification methods for Cd(II) from aqueous solution under different levels of initial Cd(II) concentration (0–800 mg·L−1), temperature (298, 308, and 318 K), contact time (0–1440 min), pH value (2–10), and ionic strength (0–0.6 mol·L−1). The results indicated that the modification method affected the adsorption of Cd(II) by changing the specific surface area (SSA), Si content, surface morphology, and O-containing functional group of rice straw. Compared with Sp, Ms held more surface O–H, aliphatic and aromatic groups, while Sa had more phenolic, C–O (or C–O–C), and Si–O groups, and Sb held more C–O (or C–O–C) and Si–O groups; besides, Sa, Sb, and Ms had larger SSA than Sp. Adsorption capacity of the four adsorbents for Cd(II) increased and gradually became saturated with the increase in the initial Cd(II) concentration (0–800 mg·L−1). The adsorption capacity of Cd(II) was significantly higher at 318 K than 298 K and 308 K, regardless of the adsorbent type. Sa had the largest SSA (192.38 m2·g−1) and the largest adsorption capacity for Cd(II). When the initial Cd2+ concentration was at 800 mg·L−1, the Cd(II) adsorption amount reached as high as 68.7 mg·g−1 with Sa at 318 K. However, the SSA of Sp was only 1.83 m2·g−1, and it had the least adsorption capacity for Cd(II). Only the adsorption of Cd(II) upon Sb at 298 K was spontaneous, and surprisingly, all other adsorptions were nonspontaneous. These adsorptions were all chemical, and were favorable, exothermic and order-increasing processes. The pseudo-second-order model showed a strong fit to the kinetics of Cd(II) adsorption by the four adsorbents. The adsorption capacities of Cd(II) by the adsorbents were less at low pH, and all were enhanced with the increase of initial pH value (2–10) in the solution. The inhibiting effect on Cd(II) adsorption due to the increase in ionic strength was greater with Sa, Sb, and Ms than that under Sp. The rice straw ash prepared by ashing unexpectedly had greater adsorption capacity for Cd(II) than the biochar and citric acid modified rice straw. The optimum condition for Cd(II) adsorption was established as the temperature of 318 K, initial Cd(II) concentration of 800 mg·L−1, contact time of 240 min, and no Na(I) interference regardless of absorbent. In conclusion, rice straw ash shows the greatest potential of being applied to paddy fields for the remediation of Cd(II) pollution so as to reduce the risk of Cd(II) enrichment in rice grains and straws.

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“…This suggests that the binding sites on MOS surface became sufficient and saturated after the initial lead ion concentrations reached 909 mg/L. It indicates that MOS released a limited amount of binding sites[27].Fig. 6shows removal efficiency values as a function of initial Pb(II) ions concentrations.…”

mentioning

confidence: 94%

THE ADSORPTION KINETICS AND MODELING FOR Pb(II) REMOVAL FROM SYNTHETIC AND REAL WASTEWATER BY MORINGA OLEIFERA SEEDS

Swelam

Sherif

Ibrahim

2018

Al-Azhar Bulletin of Science

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This work demonstrates the potential of Moringa oleifera seeds powder as an adsorbent for the removal of heavy metals from wastewater. The moringa oleifera seeds powder is characterized as an adsorbent for the removal of heavy metals from wastewater using FTIR, XRD, pH pzc , SEM and BET techniques. Several processing parameters such as; contact time, adsorbent dose, initial lead ion concentrations, pH, and temperature are optimized. The equilibrium data for bio-sorption are analyzed by using Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models to define the best correlation for lead ions. Among the four isotherm models, both Temkin and Freundlich models best describe the experimental data for Pb(II).The adsorption of the metal ions, Pb (II) is well defined by the pseudo-second order model (R 2 > 0.99). The interaction of the cationic species with the MOS powder is predominately via chemisorption rather than physisorption. The thermodynamic parameters such as ΔS, ΔH and ΔG are also determined.

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Preparation of rice straw-derived biochar for efficient cadmium removal by modification of oxygen-containing functional groups

Cited by 144 publications

References 42 publications

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Characterization and carbon mineralization of biochars produced from different animal manures and plant residues

Characterization and Interpretation of Cd (II) Adsorption by Different Modified Rice Straws under Contrasting Conditions

THE ADSORPTION KINETICS AND MODELING FOR Pb(II) REMOVAL FROM SYNTHETIC AND REAL WASTEWATER BY MORINGA OLEIFERA SEEDS

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