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Cadmium adsorption performance and mechanism from aqueous solution using red mud modified with amorphous MnO 2. ... Manganese oxide-modified …
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 ...
In this study, corn stalk was modified by manganese (Mn) before (MBC1) and after (MBC2) pyrolysis at different temperatures (400~600 °C) under anaerobic …
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.
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 …
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 …
Modified maifanite prepared by acidification, alkalization, salinization, calcination and combined modifications were first applied to treat sediment P, and results indicated that …
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 …
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 water and soil.Batch experiments in aqueous solution were conducted to evaluate the optimum sorption capability by biochar with and without manganese …
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 …
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 ...
The adsorption process of cadmium ions (Cd), manganese ions (Mn) and lead ions (Pb) onto the spent coffee grounds (SCG) and activated spent coffee grounds (biochar, A-SCG) was investigated. The SCG activation was carried out in the pyrolysis process in a fluidized bed reactor. scanning electron microscope (SEM) with energy …
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 …
In this study, we developed an iron-manganese modified biochar (BC-Fe-Mn) that prepared from straw with iron (Fe) and manganese (Mn) loading at a pyrolysis temperature of 550 °C. After BC-Fe-Mn immobilization for 90 days, the simultaneous immobilization efficiency of Pb, Cd, and As reached 57%, 51%, and 35%, respectively.
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 …
MnO 2-loaded D301 weak basic anion exchange resin has been used as adsorbent to simultaneously remove lead and cadmium ions from aqueous solution.The effects of adsorbent dosage, solution pH and the coexistent ions on the adsorption were investigated. Experimental results showed that with the adsorbent dosage more than 0.6 …
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 ...
Biochar (BC) pyrolyzed using solid waste has attracted increasing attention for wastewater treatment, while pure BC has limitations in the simultaneous removal of arsenite (As(III)) and cadmium (Cd(II)).Herein, a novel manganese-crosslinking sodium alginate modified biochar and zerovalent iron composite (Mn/SA-BC@nZVI) was prepared for …
Therefore, removing them from aqueous solution is essential to prevent their damage to the environment. Environmental adsorption research as one solution is promising and has been getting a lot of attention in the recent years. Using modified biochar has proved to be more suitable for the adsorption of cadmium and lead.
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.
DOI: 10.1080/19443994.2015.1014860 Corpus ID: 98431674; Kinetics and mechanism study on adsorption of cadmium by freshly synthesized hydrous manganese dioxide @article{Zhai2016KineticsAM, title={Kinetics and mechanism study on adsorption of cadmium by freshly synthesized hydrous manganese dioxide}, author={Yujia Zhai and …
In this study, iron–manganese (Fe–Mn) oxide-modified biochar (BC-FM) was synthesized using rice straw biochar, and the adsorption process, removal effect, …
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-Mn were …
DOI: 10.1016/j.envpol.2022.118899 Corpus ID: 246337039; Enhancing Cd(II) adsorption on rice straw biochar by modification of iron and manganese oxides. @article{Tan2022EnhancingCA, title={Enhancing Cd(II) adsorption on rice straw biochar by modification of iron and manganese oxides.}, author={Wenbin Tan and Hang Zhou …
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 …
Semantic Scholar extracted view of "Competitive adsorption of heavy metals onto modified biochars: Comparison of biochar properties and modification methods." ... Adsorption behavior of lead, cadmium, and arsenic on manganese-modified biochar: competition and promotion. Gai Zeng Mengying Si +6 authors Zhihui …
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).
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 …
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 …
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 …
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 …
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 …
It is challenging to reduce the cadmium (Cd) and arsenic (As) contents of brown rice simultaneously due to their converse chemical behaviors in the paddy soil.Clay minerals, such as sepiolite (SEP), have significant advantages in remediating Cd-contaminated soil. Moreover, iron or manganese oxide loaded SEP can improve the As …
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. …
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 …
In this work, a KMnO4-modified-biochar-based composite material with manganese oxide produced at 600 °C was fabricated to investigate the sorption …