Super-high Adsorption Research Articles

Zwitterionic MOF-embedded alginate beads with polydopamine surface functionalization for efficient doxycycline removal: Optimization and mechanistic study

The adsorptive removal of amphoteric antibiotics like doxycycline (DOX) is a difficult task because of the electrostatic repulsion between these amphoteric molecules and adsorbents. For this purpose, a zwitter adsorbent was fabricated by incorporating zwitter ZIF-67/MIL-88A binary MOF into the matrix of alginate (Alg); in addition, the surface of the beads was modified by polydopamine (PDA). The batch experiments implied the super-high adsorption efficacy of ZIF-67/MIL-88A@Alg@PDA toward DOX attained 384.61 ± 5.08 mg/g at a neutral pH medium, 25 °C, and using 0.02 g. The isotherm analysis implied the physisorption of DOX onto ZIF-67/MIL-88A@Alg@PDA, while the kinetic analysis denoted the chemisorption of DOX. The results of XPS, Zeta potential, and Lab experiments identified the types of physical and chemical interactions between ZIF-67/MIL-88A@Alg@PDA and DOX. The durability of the ZIF-67/MIL-88A@Alg@PDA beads was inspected by the recycling test, clarifying that the DOX adsorption aptitude declined by 12.22 mg/g. In addition, the measured leaching concentrations of cobalt and iron from the leaching test were 0.008 and 0.098 mg/L. The ionic strength of ZIF-67/MIL-88A@Alg@PDA, implying an enhancement in the DOX removal (%) from 83.51 to 93.50 % by raising the NaCl concentration from 0.2 to 1.0 mol/L. Therefore, our study could provide a simple procedure to overcome the electrostatic repulsion that retard the adsorption process of the amphoteric drugs onto charged adsorbents with positive or negative charges. Additionally, this procedure could also generate an electrostatic interaction between the zwitter adsorbents and the amphoteric drugs at specific pH media when they are in a zwitterionic nature.

DFT Simulations Investigating the Trapping of Sulfides by 1T-LixMoS2 and 1T-LixMoS2/Graphene Hybrid Cathodes in Li-S Batteries

The aim of this study is to investigate new materials that can be employed as cathode hosts in Li-S batteries, which would be able to overcome the effect of the shuttling of soluble polysulfides and maximize the battery capacity and energy density. Density functional theory (DFT) simulations are used to determine the adsorption energy of lithium sulfides in two types of cathode hosts: lithiated 1T-MoS2 (1T-LixMoS2) and hybrid 1T-LixMoS2/graphene. Initial simulations of lithiated 1T-MoS2 structures led to the selection of an optimized 1T-Li0.75MoS2 structure, which was utilized for the formation of an optimized 1T-Li0.75MoS2 bilayer and a hybrid 1T-Li0.75MoS2/graphene bilayer structure. It was found that all sulfides exhibited super-high adsorption energies in the interlayer inside the 1T-Li0.75MoS2 bilayer and very good adsorption energy values in the interlayer inside the hybrid 1T-Li0.75MoS2/graphene bilayer. The placement of sulfides outside each type of bilayer, over the 1T-Li0.75MoS2 surface, yielded good adsorption energies in the range of −2 to −3.8 eV, which are higher than those over a 1T-MoS2 substrate.

Ultra-high specific surface area activated carbon from Taihu cyanobacteria via KOH activation for enhanced methylene blue adsorption

Biomass-based activated carbon (CBACs) was successfully prepared by pyrolysis-activation of Taihu cyanobacteria. When the impregnation ratio and activated temperature were 2 and 800 oC, respectively, the optimal CBACs possessed an ultra-high specific surface (2178.90 m2·g−1) and plenty of micro-and meso-pores, as well as a high pore volume (1.01 cm3·g−1). Ascribed to ultra-high surface area, π-π interaction, electrostatic interaction, as well as hydrogen bonding interactions, the CBACs displayed huge superiority in efficient dye removal. The saturated methylene blue (MB) adsorption capacity by CBACs could be as high as 1143.4 mg·g−1, superior to other reported biomass-activated carbons. The adsorption was endothermic and modelled well by the pseudo-second-order kinetic, intra-particle diffusion, and Langmuir models. This work presented the effectiveness of Taihu cyanobacteria adsorbent ascribed to its super large specific surface area and high adsorption ability.

Supported hybridization of MgCuFe-layered double hydroxides for efficient adsorption of chlortetracycline hydrochloride in sewage

For the sustainable development of human health and environment, effective measures should be taken to minimize antibiotics contamination. Layered double hydroxides (LDHs) are promising alternative adsorbents for antibiotics removal with features of low cost and easily available. In this work, a hybrid composite of MgCuFe-LDHs loading with metal–organic framework of HKUST-1 (HKUST-1@MgCuFe-LDHs) was synthesized via a simple hydrothermal method, and then characterized by FT-IR, SEM, XPS, XRD and N2 adsorption -desorption isotherms systematically. The as-obtained composite exhibited amazing superhigh adsorption capacity of 3381 mg/g to chlortetracycline hydrochloride (CTC), which is far superior to the most of reported adsorbents. The improved adsorption forces are associated with the hydrogen bonds, metal complexation, π-π interaction and electrostatic attraction, based the findings on the structure–activity relationship. The adsorption isotherms and kinetics as well as the pH, coexisting ions and temperature effects were studied to verify the above conclusions. The reusability investigation showed that this proposed advanced adsorbent has good stability and high application value for wastewater treatment.

Ultra-purification of heavy metals and robustness of calcium silicate hydrate (C–S–H) nanocomposites

For the sake of remediating the contamination of heavy metal ions (HMs) that poses high risk to the global environment, a novel inorganic nanocomposite with excellent robustness, calcium silicate hydrate (C–S–H), is synthesized at extremely low cost yet presents rapid adsorption rate and superhigh adsorption capacity. High concentrations of Cu(Ⅱ), Cd(Ⅱ), Co(Ⅱ) and Cr(Ⅲ) in wastewater can be purified to ultra-low level (∼0.008 mg L−1) within 60 min at low C–S–H dosage, the concentration and pH indexes of which meet the standard for direct discharge in China. The adsorption processes are spontaneous, following the Langmuir adsorption isotherm model, and its kinetics conforms to pseudo-second order model. Meanwhile, C–S–H presents excellent anti-interference performance during the ultra-purification of HMs when exposed to the acid environments, solutions with various HMs as well as high salinity. The ultra-purification of HMs and robustness of C–S–H is realized through multiple mechanisms based on adsorption, involving hydrolysis of HMs, electrostatic interaction, chemical microprecipitation, surface complexation and interlayer complexation, among which interlayer complexation is dominant. All these verify the robust performance and broad applicability of C–S–H to complex aqueous systems.

Rational design and synthesis of diimide-based metal-organic frameworks for lanthanides recovery from tailing wastewater

Owing to the importance of lanthanides (Lns), sustainable recovery of low-concentration Lns from secondary resources is a challenge of great significance. Herein, a strategy to construct a series of metal-organic frameworks (MOFs; Cd-PDI-2D, Cd-PDI-3D, and Cd-NDI-3D MOFs) is proposed by introducing appropriate N-heterocyclic building blocks to explore the effects of functional-group types and framework soft basicity on the Ln-adsorption performance of MOFs. In contrast, Cd-PDI-2D shows amino groups along the 110 crystal plane as effective anchors for Lns, exhibiting super-high adsorption capacity and significant selectivity, due to the softer basicity of the two-dimensional framework. Moreover, the Cd-PDI-2D is utilized as column-packing materials to successfully extract ppb-level Lns from ppm-level competing ions of rare-earth tailings, which demonstrates its great promise for Ln recovery from secondary sources. Furthermore, this strategy could be extended for the enrichment of other noble metals in natural samples by rationally designing targeted linking ligands.

High capacity adsorption of antimony in biomass-based composite and its consequential utilization as battery anode

Antimony is more than an emerging pollutant in water but a scare resource. In this study, we report an adsorbent with the record capacity so far from the balanced view of Sb(III) and Sb(V). The composite adsorbent was fabricated by encapsulating hollow Fe3O4 nanosphere with the EDTA grafted chitosan, and it has superhigh adsorption capacity of for 657.1 mg/g for Sb(III) and 467.3 mg/g for Sb(V), respectively. The mechanism study reveals that the adsorption of Sb initializes from the Fe3O4, propagates along the chitosan with hydrogen bond, and terminates at the inner sphere complex with the EDTA moiety in the adsorbent. In view of the ultra-high adsorption capacity of the adsorbent, the recovered adsorbent that contains abundant (>36.4%) highly dispersed antimony nanoparticles (600-FCSE-Sb) is applied to Li-ion battery anode after reduction. This article provides a new idea for connecting water treatment and electric energy storage.

Fabrication, Structure, Performance, and Application of Graphene-Based Composite Aerogel.

Graphene-based composite aerogel (GCA) refers to a solid porous substance formed by graphene or its derivatives, graphene oxide (GO) and reduced graphene oxide (rGO), with inorganic materials and polymers. Because GCA has super-high adsorption, separation, electrical properties, and sensitivity, it has great potential for application in super-strong adsorption and separation materials, long-life fast-charging batteries, and flexible sensing materials. GCA has become a research hotspot, and many research papers and achievements have emerged in recent years. Therefore, the fabrication, structure, performance, and application prospects of GCA are summarized and discussed in this review. Meanwhile, the existing problems and development trends of GCA are also introduced so that more will know about it and be interested in researching it.

Enhanced capacitive removal of hardness ions by hierarchical porous carbon cathode with high mesoporosity and negative surface charges

Capacitive deionization (CDI), as a promising desalination technology, has been widely applied for water purification, heavy metal removal and water softening. In this study, the hierarchical porous carbon (HPC) with extremely large specific surface area (∼1636 m2 g−1), high mesoporosity and negative surface charges, was successfully prepared by one-step carbonization of magnesium citrate and acid etching. HPC carbonized at 800 ℃ exhibited an excellent specific capacitance (207.2 F g−1). The negative surface charge characteristic of HPC was demonstrated by potential of zero charge test. With HPC-800 as a CDI cathode, the super high adsorption capacity of hardness ions (Mg2+: 472 μmol g−1, Ca2+: 425 μmol g−1) with ultrafast adsorption rate was realized, attributed to its abundant mesoporous structure and negative surface charges. The priority order of ion adsorption on HPC in the multi-component salt solution was Mg2+ > Ca2+ > K+ ≈ Na+. The desalination and softening of the actual brackish water have been simultaneously achieved by three-cell CDI stack after four times of adsorption, with 63% decrease of total dissolved solids and 76% reduction of hardness. The current HPC material with outstanding adsorption performance for hardness ions shows great potential in brackish water purification.

Superhigh Adsorption of Cadmium(II) Ions onto Surface Modified Nano Zerovalent Iron Composite (CNS-nZVI): Characterization, Adsorption Kinetics and Isotherm Studies

The efficiency of surface modified nanoscale zerovalent iron (nZVI) composite by cashew nut shell (CNS) was tested for the removal of cadmium ions from the aqueous solutions. 2 g/l CNS-nZVI was efficient for 98% removal. The adsorption capacity was 35.58 mg/g. The Freundlich isotherm (R2 = 0.9769) and the pseudo-second order adsorption kinetics data fitted well. This proved CNS-nZVI has a high removal efficiency for Cd(II) from aqueous solutions.

Sucrose hybridization modification of polycationic gel to realize super-high adsorption of lignins for reusable purification of wastewater

Sucrose was first used to modify a polycationic gel to form the novel water treatment material of sucrose-hybridized polycationic gel (SHPCG). The new sucrose hybridization effect allowed the SHPCG to show a super-efficient adsorption ability in the purification of papermaking wastewater. The SHPCG exhibited a super-high adsorption capacity toward lignins, reaching 8279.86 mg/g, i.e., the mass of the lignins adsorbed was 8.28 times higher than the mass of SHPCG adsorbent, which was, furthermore, 2.13–41.20 times higher than those of a series of previously reported polycationic adsorbents without the incorporation of sucrose units. Subsequently, the SHPCG wastes after lignin adsorption could be reused directly to purify dyeing wastewater, and maintained its adsorption capacity, being 278.05 times higher than that of activated carbon. Analysis of the interaction mechanisms showed that the sucrose hybridization effect in the polycationic gel skeleton with a large accommodation space had improved the adsorption associativity and interaction intensity of SHPCG toward lignins, and caused the efficient aggregations of lignins in the SHPCG skeleton. This would be the key factor for the super-high adsorption capacity of SHPCG toward lignins. In addition, there was an electrostatic substitution with coating adsorption effect to help in the efficient reuse of SHPCG wastes.

One-pot hydrothermal preparation of manganese-doped carbon microspheres for effective deep removal of hexavalent chromium from wastewater

Mn-doped activated carbon microspheres (MnOx/ACS) with super-high adsorption capacities and deep removal capability for hexavalent chromium (Cr(VI)) were successfully prepared via an ammonium persulfate-assisted hydrothermal method followed by potassium oxalate activation using KMnO4 and sucrose as raw materials. Their -physical and chemical properties, as well as those of Mn-doped non-activated carbon spheres (MnOx/CS), were characterized by XRD, SEM, TEM, EDS-mapping, XPS, N2 adsorption–desorption, ICP-AES, and elemental analysis. It was found that the manganese oxide (MnOx) particles were uniformly embedded within the carbon spheres via layer-by-layer capture, and the MnOx/ACS exhibited strong redox activity because of the multivalent nature of MnOx, resulting in excellent adsorption performance via reduction. In particular, MnOx/ACS-4 with a Mn content of 1.06 wt% and a specific surface area of 1405.7 m2 g−1 achieved a maximum adsorption capacity of 660.7 mg g−1; this can reduce Cr(VI) content to less than 0.05 mg L-1, which meets the corresponding Chinese drinking water quality standard when the initial concentration of Cr(VI) is less than 400 mg L-1. Furthermore, this highly efficient method can be extended to prepare V-, Mo-, or W-doped carbon microspheres with significantly enhanced adsorption performance for Cr(VI) compared to bare activated carbon sphere, indicating their good application prospect for the deep removal for heavy metal ions from wastewater.

Effectively removing tetracycline from water by nanoarchitectured carbons derived from CO2: Structure and surface chemistry influence

Understanding of the correlation between physico-chemical property of adsorbent and the adsorption performance of contaminant is very significant for developing high-efficient materials to remove antibiotic contamination from water. In this work, a novel kind of carbon adsorbent (EC) derived from CO2 and activated ECs with modified structure via a facile chemical method using H2 and KOH were prepared. The synthetic carbon materials (EC, EC-H2, and EC-KOH) were then applied to remove tetracycline (TC). The kinetics of adsorption for these three carbon materials all well fitted the pseudo-second-order kinetic model. The experimental data of adsorption isotherm had good compatibility with Langmuir and Freundlich models (R2 > 0.90), but the Temkin model was the most applicable for all adsorbents (R2 > 0.98). A super-high adsorption capacity of EC-KOH obtained from Langmuir fitting was 933.56 mg g−1, which was much higher than that of EC-H2 (538.91 mg g−1) and EC (423.30 mg g−1), possibly due to its larger specific surface area (SBET), pore volume, and specific surface chemical structure. Moreover, it was found that surface functional groups and large aperture of adsorbents had a positive effect on adsorption rate. More adsorption sites and surface functional groups of adsorbents were beneficial to enhance the adsorption affinity. These results are of great benefit to the directional control of carbon structure to increase the adsorption performance in rate, capacity, and affinity of antibiotics.

Preparation of Novel Magnetic Sodium Alginate-Ferric(III) Gel Beads and Their Super-Efficient Removal of Direct Dyes from Water

Novel magnetic sodium alginate-based biopolymer Fe3O4@SA-Fe was successfully prepared by the cross-linking reaction of sodium alginate (SA) and Fe(III) ions and adding magnetic ferric oxide (Fe3O4), and characterized by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), Fourier Transform-Infrared (FTIR), X-ray Photoelectron Spectroscopy (XPS) and Vibrating Sample Magnetometer (VSM), respectively. The effects of preparation and adsorption conditions on the adsorbent were investigated by adsorbing Congo red (CR) and Direct red 23 (DR 23) dyes. The results showed that the synthesized Fe3O4@SA-Fe polymer gel beads exhibited super-high adsorption property and good stability when the mass concentrations of SA, Fe(III) ions and Fe3O4 are 16, 12.5 and 7 g/L at room temperature respectively. The adsorption rates of two dyes by Fe3O4@SA-Fe were very fast at 298 K, and the time required to reach the equilibrium was very short, which was 30 min for CR and 60 min for DR 23. Moreover, the dye removal efficiencies were over 99.4% and 95.2% in a wide pH range of 2.0 ~ 9.0 for CR and 2.0 ~ 10.0 for DR 23, respectively. The adsorption process could be accurately described by the pseudo-second-order rate model, which were mostly controlled by intra-particle diffusion. The fitting results of isothermic data by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) models revealed that the equilibrium data completely obeyed the Langmuir model and the obtained maximum adsorption capacities of CR and DR 23 were 3333 and 1429 mg/g at 298 K, respectively. FTIR, UV-Vis and XPS analysis indicated that the electrostatic adsorption, hydrogen bonding and ligand exchange promoted the interaction between dye molecules and Fe3O4@SA-Fe. A green magnetic biosorbent Fe3O4@SA-Fe gel beads with simple preparation method and high-cost performance can be used for super-efficient purification of high-concentration dye effluent and quickly separated from the aqueous phase and recovered, which would have a good application prospect.

Porous carbon-based MgAlF5·1.5H2O composites derived from carbon-coated clay presenting super high adsorption capacity for Congo Red

Carbon and clay-based composites have great potential to be applied as sorbents for dye removal in wastewater treatment. Existing sorbent materials suffer from high cost and relatively low capacity. The key to solve this problem is to develop new composites as adsorbents. Here, we report a newly developed porous carbon-based MgAlF5·1.5H2O nanocomposites derived from carbon-coated palygorskite via a single-step HF etching for the first time. Structural and compositional evolution of a series of samples occured by subtly tuning of HF doses. Our results highlight the significantly enhanced adsorption capacity of Congo Red wastewater (4261.0 mg/g), which is approximately 7 and 123 times that of porous carbon (572.0 mg/g) and carbon-coated palygorskite (34.4 mg/g), respectively. The enhanced adsorption property is attributed to chemisorption mechanism between MgAlF5·1.5H2O and Congo Red via two Al atoms binding to two O atoms of the –SO3− group. The corresponding adsorption energy was calculated to be −1.01 eV. In this work, porous carbon-based MgAlF5·1.5H2O adsorbents possess the characteristics of super high adsorption capacity, low cost and no pH dependence, which meets the environmental, economical and engineering requirements for wastewater dye removal, especially, for wastewater treatment under emergency circumstances.

Preparation of hyperelastic graphene/carboxymethyl cellulose composite aerogels by ambient pressure drying and its adsorption applications

Three-dimensional porous graphene-based aerogels have become one of the most promising adsorbent materials for water pollution because of their unique structure and superhigh adsorption properties. However, most pore structures of graphene-based aerogels only have affinity for certain types of pollutants. This restricts the industrial application of graphene-based aerogels to a certain extent. In this study, superelastic graphene/carboxymethyl cellulose composite aerogels (SGA/CMC) were prepared under ambient pressure. And the effects of reducing agent dosage, prereduction time and pH value on the formation of aerogel were investigated. FTIR, XRD, XPS, Raman, SEM and microcomputer-controlled electronic universal testing machine were used to characterize the structure, stress–strain and micromorphology of SGA/CMC. The results show that SGA/CMC can not only adsorb the pure organic compound, but also the dye in water. The static adsorption rate of cyclohexane on water surface is 13.15 g g−1 s−1, and the removal rate of methylene blue in water can reach 99.7%. In addition, SGA/CMC shows high elasticity and fatigue resistance. After 500 cycles of cyclic compression at 80% strain, it can still recover to about 95% of the original height.

High-Efficiency Removal of Cr(VI) from Wastewater by Mg-Loaded Biochars: Adsorption Process and Removal Mechanism.

Biochars were produced with magnesium chloride as an additive for the sorption of hexavalent chromium dissolved in water using five types of straw (from taro, corn, cassava, Chinese fir, and banana) and one type of shell (Camellia oleifera) as the raw materials. The removal of hexavalent chromium by the six biochars mainly occurred within 60 min and then gradually stabilized. The kinetics of the adsorption process were second order, the Langmuir model was followed, and the adsorption of Cr(VI) by the six biochars was characterized by Langmuir monolayer chemisorption on a heterogeneous surface. Banana straw biochar (BSB) had the best performance, which perhaps benefitted from its special structure and best adsorption effect on Cr(VI), and the theoretical adsorption capacity was calculated as 125.00 mg/g. For the mechanism analysis, Mg-loaded biochars were characterized before and after adsorption by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), and scanning electron microscopy/energy dispersive spectroscopy (SEM-EDS). The adsorption mechanism differed from the adsorption process of conventional magnetic biochar, and biochar interactions with Cr(VI) were controlled mainly by electrostatic attraction, complexation, and functional group bonding. In summary, the six Mg-loaded biochars exhibit great potential advantages in removing Cr(VI) from wastewater and have promising potential for practical use, especially BSB, which shows super-high adsorption performance.

Self-supporting Prussian blue@CNF based battery-capacitor with superhigh adsorption capacity and selectivity for potassium recovery

Prussian blue (PB), due to its abundant interstitial sites and high theoretical specific capacity, offers a great possibility in battery and capacitive deionization application. Herein, we developed a facile strategy for in-situ growth of PB on an electrospun flexible Fe-rich porous carbon nanofiber (Fe-CNF) to obtain the self-supporting PB-inlaid CNF (PB@CNF). By simple incubation of Fe-CNF in a K4[Fe(CN)6] aqueous solution with the slow addition of acid, a large number of PB particles were evenly and tightly confined inside the pores of fibers with good stability. Being directly used as a self-supporting battery electrode, the PB@CNF delivered an excellent specific capacity of 318.4 F·g−1 owing to the uniform distribution of PB particles along the conductive CNF matrix. This self-supporting PB@CNF electrode has been applied successfully in battery-capacitor deionization device for selective potassium adsorption with a super-high adsorption capacity of 2.55 mmol·g−1 (equivalent of 190.1 mg·g−1 KCl adsorption) and excellent stability. In the synthetic seawater containing the coexistent Na+, Ca2+ and Mg2+, the recovery of K+ achieved 73.4%. This synthesis approach shows great potential for designing the flexible electrode for use in capacitor and batteries.

Intrinsically microstructured graphene aerogel exhibiting excellent mechanical performance and super-high adsorption capacity

Highly porous graphene aerogels (GAs) demonstrate extensive applications in damping blocks, thermal insulation, sensors, catalyst carriers and energy storage because of their ultralow density, superelasticity and functional versatility. These properties have been regulated by topological structural design and composite of materials, but the effect of the structural unit on the properties of GA has not been reported. Herein, highly porous GAs with excellent mechanical performances and improved adsorption capacities have been prepared by a freezing-drying process. Ultra-flyweight (ρ < 1 mg cm−3), superelastic (low energy loss factor) and high-strength (i.e., high Young’ modulus) aerogels can be obtained by integrating different wall thicknesses and pore sizes. And it has been found that the grain refinement of ice crystals has a positive impact on the strength and modulus of as-prepared GAs during freezing-drying, which is similar to typical Hall-Petch strengthening in fine crystal metal materials. The as-prepared GA with the thinnest wall thickness exhibits the highest adsorption properties with respect to the oil solvents, and the adsorption capacity is 1272 times of its own weight. This study enriches our understanding of the structure and performance of GAs and indicates a practical methodology to ensure precise structural control of high-performance GAs for various applications.

Biohybrid Hydrogel and Aerogel from Self-Assembled Nanocellulose and Nanochitin as a High-Efficiency Adsorbent for Water Purification.

A simple and novel method, self-assembly of nanocellulose and nanochitin, was developed to produce high-efficiency and versatile biohybrid hydrogel (BHH) and aerogel (BHA) for water purification. The self-assembly process was driven by the electrostatic force between one-dimensional (1D) negatively charged TEMPO-oxidized cellulose nanofiber (TOCNF) and positively charged partly deacetylated chitin nanofiber (PDChNF). The self-assembly process was performed at room temperature and without adding any cross-linking agents throughout the process. This results in the three-dimensional (3D) BHH that physically cross-linked via both electrostatic interactions and hydrogen bonding between TOCNF and PDChNF. The obtained BHA from lyophilized BHH exhibited a highly porous interconnected structure with a specific surface area of 54 m2·g-1, which assures the availability of its internal active site for the adsorption of toxic metalloid ions and organic pollutants. Consequently, the BHA displayed super-high adsorption capacities of 217 mg·g-1 for As(III) under the neutral pH conditions and 531 mg·g-1 for methylene blue (MB) under an alkaline aqueous condition with rapid adsorption kinetics, in sharp contrast to conventional biobased adsorbents. Moreover, the BHA is reusable, which still exhibited a high MB adsorption capacity of 505 mg·g-1 even after five successive adsorption-desorption cycles. This versatile BHA produced via a facile preparation strategy is proven to be a promising renewable adsorbent for water purification, offering simple and green alternatives to the conventional adsorbent from synthetic polymers.