Metal-based adsorbents for water eutrophication remediation: A review of performances and mechanisms

Liu, Bing; Gai, Shuang; Lan, Yibo; Cheng, Kui; Yang, Fan

doi:10.1016/j.envres.2022.113353

Cited by 37 publications

(5 citation statements)

References 125 publications

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“…The P adsorption on metal oxides is commonly attributed to electrostatic interactions and complex formation via ligand exchange Liu et al, 2022). However, pH pzc of the LZFA was 2.56 (Fig.…”

Section: Adsorption Kinetics and Isothermmentioning

confidence: 99%

Synthesis of lanthanum and waste lye modified-zeolite from fly ash and its application in constructed wetland for nitrogen and phosphorus removal

Liu,

Liang,

2023

Preprint

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Excess inputs of nitrogen (N) and phosphorus (P) can lead to imbalance in water ecosystems and thus trigger eutrophication. In this study, a novel Lanthanum modified zeolite synthesized from fly ash (LZFA) was prepared and used as a modified substrate for constructed wetland (CW) to enhance N and P removal. Single-factor and surface methodology (RSM) were used to optimize the preparation. The results showed that the maximum adsorption capacities of N and P were 17.26 mg/g and 21.48 mg/g. The decline in sorption capacity or diffusion coefficients of LZFA for N compared to zeolite synthesized from fly ash (ZFA) is mainly due to the decrease in surface negative charge and cation exchange capacity. The mechanism of P adsorption is attributed to the formation of La-O-P monodentate, bidentate mononuclear or bidentate binuclear inner-sphere complexation. Meanwhile, the introduction of Ca in waste lye is also involved in the P reaction. The N and P removal rates of LZFA modified subsurface flow constructed wetland (SFCW) were 2.67% and 7.33% higher than SFCW modified with gravel. In practical production, if a circular chain from coal ash production to use in green plant fertilizer can be established, the cost of treating P can be significantly reduced.

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Section: Adsorption Kinetics and Isothermmentioning

confidence: 99%

Synthesis of lanthanum and waste lye modified-zeolite from fly ash and its application in constructed wetland for nitrogen and phosphorus removal

Liu,

Liang,

2023

Preprint

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“…To this end, adsorption-based removal of P i offers a facile water treatment strategy, as demonstrated by other studies. 4–9…”

Section: Introductionmentioning

confidence: 99%

“…To this end, adsorption-based removal of P i offers a facile water treatment strategy, as demonstrated by other studies. [4][5][6][7][8][9] Biopolymers are a sustainable and abundant source of potential adsorbent materials. Biopolymers such as chitosan (Chi), cellulosic materials, and their modied forms are versatile adsorbents for the removal of waterborne pollutants.…”

Section: Introductionmentioning

confidence: 99%

Eggshell incorporated agro-waste adsorbent pellets for sustainable orthophosphate capture from aqueous media

Steiger,

Bui,

Babalola

et al. 2024

RSC Sustain.

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“…Phosphorus accumulation leads to eutrophication of water bodies, and 29.1% of China’s 110 lakes are reported to be eutrophic. However, many countries and regions have developed corresponding policies and regulations to limit phosphorus emissions [ 5 ]. Therefore, the efficient removal and recovery of phosphate from water media are key measures to solve the above two problems.…”

Section: Introductionmentioning

confidence: 99%

Efficient Recovery of Phosphate from Water Media by Iron-Magnesium Functionalized Lignite: Adsorption Evaluation, Mechanism Revelation and Potential Application Exploration

An,

Wang,

Chen

et al. 2024

Molecules

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Selective phosphorus removal from aquatic media has become an ideal strategy to mitigate eutrophication and meet increasingly stringent discharge requirements. To achieve phosphorus control and resource utilization of low-calorific-value lignite, iron and magnesium salts were used to functionalize lignite, and iron–magnesium functionalized lignite (called IM@BC) was prepared for phosphate recovery from water media. The adsorption properties of IM@BC were systematically evaluated, especially the influence of ambient pH and co-existing ions. The kinetic, isothermal, and thermodynamic adsorption behaviors of IM@BC were analyzed. The adsorption mechanism was revealed by microscopic characterization. The potential application of phosphate-containing IM@BC (P-IM@BC) was explored. The results show that IM@BC has a strong phosphate adsorption capacity, and the maximum adsorption capacity is 226.22 mgP/g at pH = 3. Co-existing CO32− inhibits phosphate adsorption, while coexisting Ca2+ and Mg2+ enhance the effect. At the initial adsorption stage, the amount of phosphate adsorbed by IM@BC continues to increase, and the adsorption equilibrium state is gradually reached after 24 h. The adsorption process conforms to the pseudo-second-order kinetic model (PSO) and Langmuir isothermal adsorption model, and the adsorption process is mainly chemical adsorption. The phosphate absorption capacity is positively correlated with temperature (283.15 K~313.15 K), and the adsorption process is spontaneous, endothermic, and entropy-increasing. Its adsorption mechanism includes electrostatic attraction, ion exchange, surface precipitation, and coordination exchange. IM@BC can efficiently recover phosphate from actual phosphorus-containing wastewater with a recovery efficiency of up to 90%. P-IM@BC slowly releases phosphate from pH 3 to 11. Plant growth experiments showed that P-IM@BC could be used as a slow-release fertilizer to promote the root growth of cowpeas. The novelty of this work lies in the development of a highly efficient phosphate recovery adsorbent, which provides a feasible method of phosphorus control in water media and resource utilization of lignite.

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Metal-based adsorbents for water eutrophication remediation: A review of performances and mechanisms

Cited by 37 publications

References 125 publications

Synthesis of lanthanum and waste lye modified-zeolite from fly ash and its application in constructed wetland for nitrogen and phosphorus removal

Synthesis of lanthanum and waste lye modified-zeolite from fly ash and its application in constructed wetland for nitrogen and phosphorus removal

Eggshell incorporated agro-waste adsorbent pellets for sustainable orthophosphate capture from aqueous media

Efficient Recovery of Phosphate from Water Media by Iron-Magnesium Functionalized Lignite: Adsorption Evaluation, Mechanism Revelation and Potential Application Exploration

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