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To improve the adsorption efficiency, a H 3 PO 4-modified biochar (CFCP) was prepared using chicken feather and applied to Cd 2+ and Pb 2+ adsorption. The pseudo-second-order model could explain the Cd 2+ and Pb 2+ adsorption behavior. CFCP had faster adsorption rate than non-modified biochar (CFC2).
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DOI: 10.1016/j.jece.2021.106502 Corpus ID: 242548602; Adsorption of cadmium and lead from aqueous solution using modified biochar: A review @article{Liu2021AdsorptionOC, title={Adsorption of cadmium and lead from aqueous solution using modified biochar: A review}, author={Tianqi Liu and Yelly Lawluvy and …
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Montmorillonite (MMT) is a good sorbent of cadmium, but the adsorbability is weak. Thiol-Modified Montmorillonite could increase the adsorption of cadmium, but the studies about thiol-modified montmorillonite (MMT-SH) and the adsorption mechanism of cadmium on MMT-SH are rarely reported. In this study, the MMT-SH was prepared …
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Potassium permanganate-modified bamboo biochar (MBB) was used to adsorb manganese from simulated groundwater and its performance was compared to that of unmodified bamboo biochar (BB), activated carbon, and manganese greensand. The adsorption kinetics, adsorption isotherms, and manganese fractions were …
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Adsorption of Cd(II) species at pH = 5 was studied on three carbon adsorbents: granular activated carbon, activated carbon fiber, and activated carbon cloth. As-received and oxidized adsorbents were used. Cd(II) adsorption greatly increased after oxidation due to the introduction of carboxyl groups. The use of a buffer solution to …
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Cadmium (Cd) is a highly prevalent metal pollutant in water, presenting significant risks to both ecological and human health due to its high biological toxicity, mobility, and potential for ...
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The cadmium adsorption capacity of biomass waste modified by manganese potassium ore increased by 50.94%, which could be well used for long-term stabilization and recycling of Cd.
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In this study, iron–manganese (Fe–Mn) oxide-modified biochar (BC-FM) was synthesized using rice straw biochar, and the adsorption process, removal effect, and the mechanism of cadmium (Cd) adsorption on BC-FM in wastewater treatment were explored through batch adsorption experiments and characterization (SEM, BET, FTIR, …
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Biochar adsorption of heavy metals has been a research hotspot, yet there has been limited reports on the effect of heavy metal interactions on adsorption efficiency in complex systems. In this study, the adsorbent was prepared by pyrolysis of rice straw loaded with manganese (BC-Mn). The interactions of Pb, Cd and As adsorption on BC …
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Biochar adsorption of heavy metals has been a research hotspot, yet there has been limited reports on the effect of heavy metal interactions on adsorption …
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Natural diatomite modified by acetic acid (C-D) and sodium hydroxide (Na-D) for adsorbing manganese (Mn) was studied. The construction and morphology of the modified diatomite were then characterized by different efficient and accurate detection methods (Fourier transform infrared, scanning electron microscopy, and …
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The functional groups on the modified biochars provide sites for the conversion and adsorption of As, enhancing the adsorption capacity of As and further increasing the electrostatic attraction of soil colloids for As. FM1:3-BC has a higher ability to remediate As than the other modified biochars, adsorbing As and forming oxygen …
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Rice straw and corn straw were selected as raw materials to prepare biocharby anoxic carbonization and the biochar was loaded on the surface with FeCl3, MnCl2 and Fe(NO3)3 & KMnO4, respectively, and then two types of straw biochar and six types of modified biochar were prepared. FT-IR, SEM, and XRD were used to …
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In this work, a KMnO4-modified-biochar-based composite material with manganese oxide produced at 600 °C was fabricated to investigate the sorption mechanism of Cd(II) and to comprehensively evaluate the effect of the modification on biochar properties. Cd(II) adsorption mechanisms were mainly controlled by interaction …
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Manganese (Mn) oxide is a ubiquitous metal oxide in sub-environments. The adsorption of Cd(II) on Mn oxide as function of adsorption time, pH, ionic strength, temperature, and initial Cd(II) concentration was investigated by batch techniques. The adsorption kinetics showed that the adsorption of Cd(II) on Mn oxide can be satisfactorily simulated by …
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The modified surface of granulated activated carbon increased the adsorption capacity for adsorption of Cu 2 + and Cd 2 + greatly (Fan and Anderson, 2005). Puppa performed the adsorption of cations Cd 2 +, Zn 2 + and Cu 2 + on …
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In this study, iron-manganese modified biochar (FMBC) with high adsorption properties was prepared from broad bean straw using FeCl 3 ·6 H 2 O and KMnO 4 for the remediation of soil contaminated with a mixture of Cd and Pb. This study aimed to achieve the following objectives: (1) analyze the impact of Fe-Mn modification …
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The purpose of this study is to explore the behavior and mechanism of using amorphous MnO 2 modified red mud to enhance the removal of cadmium. The manganese dioxide modified red mud (MRM) was prepared by the redox reaction between potassium permanganate and manganese sulfate for Cd 2+ adsorption.
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It is concluded that the MBC 2 could be a promising amendment for Cd in both water and soil real field applications and reduce the mild acid-soluble fraction Cd. In this study, corn stalk was modified by manganese (Mn) before (MBC 1 ) and after (MBC 2 ) pyrolysis at different temperatures (400~600 °C) under anaerobic conditions for Cd sorption in both …
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Our previous studies indicated that iron or iron‑manganese modified SEP could significantly improve the adsorption efficiency of Cd and As in an aqueous solution (unpublished data). Accordingly, it was hypothesized that the application of iron or iron‑manganese modified SEP in soil could reduce the Cd and As contents of rice …
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In this study, iron-manganese (Fe-Mn) oxide-modified biochar (BC-FM) was synthesized using rice straw biochar, and the adsorption process, removal effect, and the mechanism of cadmium (Cd) adsorption on BC-FM in wastewater treatment were explored through batch adsorption experiments and characterization (SEM, BET, FTIR, …
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The adsorption capacity of cadmium for humic acid that is adsorbed onto goethite-coated sand before reacting with a cadmium system, exceeds that of humic acid that is mixed with cadmium ions ...
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Regarding cadmium adsorption capacity, the effect of pH media (3, 5 and 7), the contact time (0 to 320 min.) and the initial cadmium ion concentration (6 to 42 …
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The presence of lead (II) changed the cadmium adsorption behaviour, indicating that adsorption–desorption was a physical interaction on different surfaces. ... Modified cellulose has a more ...
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A plot of ln C e versus q e, enable the determination of the isotherm constant B T and K T from the slope and the intercept respectively. The Temkin model was chosen to estimate the adsorption potentials of the adsorbent for Manganese adsorbates. The Temkin constant, B T related to heat of sorption for Manganese ions were calculated. …
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The adsorption was found to depend on the homoionic form of the zeolite and to a lesser extent the source of theZeolite, revealing the potential of clinoptilolite in metal-polluted industrial effluent treatment. The performance of modified clinoptilolites (zeolites) from two different sources (South Africa and the USA) for the adsorption of …
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The present study reveals that the uptake of cadmium and copper ions by modified clays is an ion exchange phenomenon. The possibility of metal ions getting entrapped in the pores also cannot be ruled out. 5. ConclusionThe modified amorphous derivative of kaolinite shows better adsorption of metal ions viz. Cd and Cu than the …
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Request PDF | Cadmium adsorption on manganese modified bentonite and bentonite–quartz sand blend | The bentonite from deposit Stará Kremnička and quartz sand from deposit Šaštín both from ...
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In this study, iron-manganese modified biochar (FMBC) with high adsorption properties was prepared from broad bean straw using FeCl 3 ·6 H 2 O and KMnO 4 for the remediation of soil contaminated with a mixture of Cd and Pb. This study aimed to achieve the following objectives: (1) analyze the impact of Fe-Mn modification …
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Thus, adsorption of Cd on this adsorbent was found to be spontaneous and exothermic thermodynamically. The adsorption capacity for Cd was found to be 19.8 mg/g of MNR. Under the optimised conditions, cadmium level was brought down from 100 mg/L to Cd less than detection limits and from 200 to 2 mg/L. Thus, the wastewater after …
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