Adsorption of inorganic and organic phosphorus onto polypyrrole modified red mud: Evidence from batch and column experiments

Yin, Yue; Xu, Gaoyang; Xu, Yuxing; Guo, Mengyan; Xiao, Yihua; T, Ma; Liu, Changqing

doi:10.1016/j.chemosphere.2021.131862

Cited by 28 publications

(7 citation statements)

References 30 publications

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“…For RM, to be able to use them as phosphorus adsorbents, it is necessary to be activated. Depending on the activation method, they have different high or low maximum adsorption capacities, which were consistent with results reported by Yin et al [36], Li et al [19], and Liu et al [37]. When compared with the results of Li et al [19], the maximum adsorption capacity of M-ARM for phosphate was much higher.…”

Section: Comparing the Results In This Study With Othersupporting

confidence: 89%

Application of Mesopore-Activated Red Mud for Phosphorus Adsorption

Trung

Ning

Dan

2022

Adsorption Science & Technology

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In this paper, the mesopore-activated red mud (M-ARM) was prepared by treating red mud (RM) with acid under an ultrasonic batch and through heat treatment at 750 C. The surface area and adsorption average pore width of M-ARM were calculated and obtained values of 13.408 m2 g-1 and 25.160 nm, respectively. Therefore, the maximum adsorption capacity of M-ARM for phosphorus was 200.85 ± 1.66 mg g − 1 at 318 K and pH = 5 . At a low initial concentration (75 mg L-1), the phosphorus removal capacity by M-ARM material was up to 97.09 ± 0.15 % at 313 K. With the temperature scales varying from 298 to 313 K, the values of Gibbs free energy change ( Δ G ° ) were negative and also vary from -37.47 to -36.68. The phosphorus adsorption process in an aqueous solution is spontaneous, and this adsorption process was exothermic with enthalpy change ∆ H o = − 14.36 . From the results of investigations and calculations of thermodynamic values, kinetics, and adsorption capacity of materials, we can confirm that the materials in this study had a low-cost and potential material for applications to treat phosphorus-contaminated water. In addition, the adsorption kinetics of this material for phosphorus were also studied and discussed.

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Section: Comparing the Results In This Study With Othersupporting

confidence: 89%

Application of Mesopore-Activated Red Mud for Phosphorus Adsorption

Trung

Ning

Dan

2022

Adsorption Science & Technology

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“…60 N + at 401.8 ± 0.5 eV is considered to favor anion exchange adsorption and can interact electrostatically with anion adsorbates. 61 In addition, some studies have shown that oxygen species on the adsorbent can have a positive effect toward the adsorption of CO 2 through hydrogen bonding and quadrupole interaction. 62 The surface area and pore-size distribution were also evaluated by nitrogen adsorption and desorption isotherms (Fig.…”

Section: Physical and Chemical Characteristicsmentioning

confidence: 99%

Green synthesis of polypyrrole for CO₂ capture from humid flue gases

Wang

Liu

et al. 2023

Green Chem.

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“…Studies have shown that the unmodified RM surface has a poor wetting effect, low activity and a small specific surface area. Moreover, the basic group on the RM surface results in more negative charges of RM under high-pH conditions, which enhances the repulsion of phosphate and thereby leads to unsatisfactory phosphorus adsorption performance of undisturbed RM [20].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of phosphate by cancrinite in red mud: a first-principles study

Zhou

Qiu

et al. 2022

Mater. Res. Express

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Cancrinite is the key substance that affects the adsorption effect of phosphate from red mud(RM) . Therefore, cancrinite in RM was modified to improve its adsorption performance. Based on density functional theory(DTF), this paper optimized the structure of cancrinite, the main component of red mud, modified the cancrinite with sodium dodecyl benzene sulfonate, and studied the surface wettability changes of cancrinite before and after modification through dynamics relaxation. The effects of wetting modification on the adsorption properties of cancrinite were studied by molecular dynamics simulation of radial distribution function, adsorption site , adsorption energy and mean square displacement. Research shows that modified cancrinite Surface wettability increased by 77%, also has more adsorption sites, adsorption energy is smaller, diffusion process is accelerated, so the adsorption capacity is stronger. This study lays a theoretical foundation for enhancing the adsorption of phosphate from wastewater by RM.

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Adsorption of inorganic and organic phosphorus onto polypyrrole modified red mud: Evidence from batch and column experiments

Cited by 28 publications

References 30 publications

Application of Mesopore-Activated Red Mud for Phosphorus Adsorption

Application of Mesopore-Activated Red Mud for Phosphorus Adsorption

Green synthesis of polypyrrole for CO₂ capture from humid flue gases

Adsorption of phosphate by cancrinite in red mud: a first-principles study

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Adsorption of inorganic and organic phosphorus onto polypyrrole modified red mud: Evidence from batch and column experiments

Cited by 28 publications

References 30 publications

Application of Mesopore-Activated Red Mud for Phosphorus Adsorption

Application of Mesopore-Activated Red Mud for Phosphorus Adsorption

Green synthesis of polypyrrole for CO2 capture from humid flue gases

Adsorption of phosphate by cancrinite in red mud: a first-principles study

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Product

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Green synthesis of polypyrrole for CO₂ capture from humid flue gases