Ions In Wastewater Research Articles

One-pot synthesis of magnetic Prussian blue for the highly selective removal of thallium(I) from wastewater: Mechanism and implications

Thallium (Tl) often enters the environment via mineral exploitation and utilization. The main restriction of Tl removal is the interference of high concentrations of coexisting ions in wastewater, therefore, enhancing the selectivity for Tl is essential to its treatment. Magnetic Prussian blue particles (Fe3O4@PB), an ion-sieving material with an open structure, were synthesized through a “one-pot” method at room temperature for the highly selective removal of Tl+. The removal percentage of Tl+ was over 92% even when the concentration of coexisting ions (e.g. Zn2+, Cd2+, Cu2+, and Pb2+) were 10,000 times higher than the initial concentration of Tl+. The maximal experimental removal capacity was 528 mg Tl/g Fe3O4@PB, and the removal percentage remained steady at pH 3–10. The high selectivity of Fe3O4@PB for Tl+ is attributed to the fact that hydrated Tl+ has a smaller hydrated diameter and a lower hydration free energy than other coexisting ions, while the rapid adsorption kinetics of Tl+ results from the negative surface charge and the network of nanocapillaries of the Fe3O4@PB. Overall, a new low-cost material that is easy to synthesize and has superior Tl+ removal capacity with extremely high selectivity for Tl+ was obtained for effective magnetic removal of thallium from wastewater.

The selective adsorption performance and mechanism of multiwall magnetic carbon nanotubes for heavy metals in wastewater

The safe treatment of heavy metals in wastewater is directly related to human health and social development. In this paper, a new type of recyclable adsorbent is synthesized through the oxidation of enhancer and modification with magnetic nanoparticles. The new adsorbent not only inherits the advantages of multiwall carbon nanotubes (6O-MWCNTs), but also exhibits a new magnetic property and further improved adsorption capacity, which is conducive to the magnetic separation and recovery of heavy metals. The adsorption results indicate that multiwall magnetic carbon nanotubes (6O-MWCNTs@Fe3O4) have a good performance for Pb(II) selective adsorption, with a maximum adsorption capacity of 215.05 mg/g, much higher than the existing adsorption capacity of the same type of adsorbents. Under the action of an external magnetic field, 6O-MWCNTs@Fe3O4 that adsorbed metal ions can quickly achieve good separation from the solution. The joint characterization results of FTIR and XPS show that under the action of both coordination and electrostatic attraction, the C=O bond in the –COOH group is induced to open by the metal ions and transforms into an ionic bond, and the metal ions are stably adsorbed on the surface of 6O-MWCNTs@Fe3O4. Pb(II) has a stronger attraction than Cu(II) and Cd(II) to the lone pair of electrons in oxygen atoms to form complexes, due to the covalent index of Pb (6.41) is more larger than that of Cu (2.98) and Cd (2.71).These data provide a new type of recyclable adsorbent for the efficient treatment of heavy metal ions in wastewater and enrich relevant theoretical knowledge.

Electrosorption of cadmium ions in aqueous solutions using a copper-gallate metal-organic framework

Recently, there is a recognized need for green technologies for the effective decontamination of toxic heavy metal ions in wastewater. This study demonstrates the electrochemically assisted uptake and release of cadmium ions (Cd2+) using a redox-active Cu-based metal-organic framework (MOF) electrode. Copper gallate (CuGA), which was synthesized in an aqueous solution, is a water-stable and cost-effective MOF adsorbent in which naturally abundant gallic acid is used as a linker. This work utilized copper within the CuGA structure as a redox center to attract Cd2+ by means of Cu2+/Cu+ reduction, exhibiting rapid uptake kinetics and a much higher capacity (>60 mg g−1) compared to the case without electrochemical assistance (~15 mg g−1). In addition, by applying an opposite overpotential to induce the re-oxidation of copper, the facile recovery of Cd2+ and the regeneration of the electrode were possible without regenerants. Physicochemical characterizations including XPS were conducted to investigate the chemical oxidation states and stability of the electrode after the effective electrosorption-regeneration process. This work presents the feasibility of a Cu-based MOF electrode as a reusable platform for the efficient removal of Cd2+, supporting the continued discovery and development of new Faradaic electrodes for electrochemical wastewater treatments.

Mesopores silica nanotubes-based sensors for the highly selective and rapid detection of Fe2+ ions in wastewater, boiler system units and biological samples

Mesopores silica nanotubes (MSNTs)-based chemical sensors for the rapid detection and of highly selective Fe2+ ions have been prepared. The novel nanosensors were prepared via immobilization of 1,10-phenanthroline-5-amine (PA) and bathophenanthroline (BP) onto the MSNTs. The resultant PA and BP sensors display high sensitivity for detection the Fe2+ ions in tap water, river water, sea water, two units in simple cycle power station, and biological samples. More interestingly, upon meeting ultra-trace amount of Fe2+ ions, a red complex appears at once. Color changes can be seen from the naked eye and tracked with a smartphone or spectrophotometric techniques. The response time that is necessary to achieve a stable signal was less than 15 s. The Univariate (Univar) calibration technique had been utilized for the determination of figures of merits. The detection limit obtained from the digital image analysis was 19 ppb (7.04 × 10−7 M) for Fe2+ ions, while the obtained from the spectrophotometric method was 6.7 ppb (2.48 × 10−7 M). Therefore, the two sensors had been successfully used in the determination of Fe2+ in several real samples with high sensitivity and selectivity. In addition, they can be used as a simple, rapid, and portable method to detect and quantify the pre rust in any cooler system.

Preparation and characterization of magnetic modified bone charcoal for removing Cu2+ ions from industrial and mining wastewater

Heavy metal water pollution is an urgent global problem to be addressed. Copper ions are common toxic heavy metal pollutants in wastewater. In order to remove the excessive copper ions in wastewater, in this study, chicken bone charcoal was modified by sodium dodecyl sulfonate and combined with magnetic nanoparticles prepared with ferric chloride hexahydrate and ferrous sulfate heptahydrate to produce a high efficiency adsorbent. The characterization of the magnetically modified bone charcoal was analyzed by scanning electron microscopy, surface and porosity analyses, FTIR and thermogravimetric analysis. The optimal adsorption conditions of magnetically modified bone charcoal for Cu2+ were obtained through batch experiments. The highest removal rate and adsorption capacity of Cu2+ was 99.98% and 15.057 mg/g, respectively, when the pH was 3.0, adsorbent dosage was 0.2 g, initial concentration of the Cu2+ solution was 50 mg/L, and temperature was 25 °C. The adsorption process fitted well with the Langmuir isotherm and the pseudo-second-order kinetic model. The regeneration experiment indicated that M-SDS-BC-500 maintained a high removal rate after five repetitions. The results suggest that the adsorbent has wide application prospects.

Enhanced removal efficiency of heavy metal ions by assembling phytic acid on polyamide nanofiltration membrane

The water pollution caused by heavy metals is bringing serious damage to public health and environment, and significant efforts have been devoted to explore advanced materials and technologies for eliminating toxic metal ions more efficiently. Herein, a phytic acid (PA)-incorporated polyamide thin-film composite nanofiltration (NF) membrane is constructed though traditional interfacial polymerization and electrostatic assembly of PA with polyethyleneimine. Owing to the high negative charges of PA, the resultant NF membrane exhibits ultrahigh binding affinity for heavy metals cations, and is highly capable of removing heavy metal ions from aqueous solution. As a result, the PA-functionalized NF membrane can reduce Cd2+ and Pb2+ concentrations from 500 ppm to the ultralow level of ~0 and 5 ppb, and achieve record-breaking remove rates of 100.000% for Cd2+ and 99.999% for Pb2+. Additionally, the as-prepared NF membrane also delivers excellent long-term stability in continuous 120-h operation, and can be easily regenerated and reused without remarkable fading of the initial Cd2+ removal rate even after six filtration cycles. This work demonstrates the potential usage of the PA-functionalized NF membrane for serving as a promising platform to eliminate heavy metal ions in waste water.

Carbon-supported nickel catalyst prepared from steam-exploded poplar by recovering Ni(II)

Poplar pretreated by steam explosion was used as an adsorbent to simulate the adsorption process of nickel ion in wastewater. The result of kinetics suggested that the pseudo-second-order model was well suited to describing the adsorption of nickel ion. Through controlled adsorption, steam-exploded poplar was recycled after Ni2+ adsorption and then reduced to carbon-supported nickel catalyst (NiC700). Spectrum analyses of Fourier transform infrared spectrometry (FTIR), X-ray diffractometry (XRD), X-ray photoelectron spectrometry (XPS), Brunauer Emmett-Teller (BET) surface area, and electrochemical tests were applied to study the properties of the NiC700 relative to the control carbonized materials having no Ni (C700). The FTIR analysis revealed that there were chemical interactions and ion changes between OH, C–H, C=O, and heavy metal ions in the bio-adsorption process of nickel. The surface area of NiC700 was 1480 m2/g. The presence of Ni nanoparticles in NiC700 after reduction was confirmed by the XRD and XPS analyses. Electrochemical impedance spectroscopy (EIS), photocurrent (IT), and Mott Schottky curve results revealed that the conduction band potential of NiC700 (ECB, NiC700) was -0.10 eV vs. RHE (reversible hydrogen electrode) as an n-type semiconductor, and the Ni-doped carbon fiber exhibited certain electrophotocatalytic activity due to the nickel modification.

A one‐pot biosynthesis of an aerogel composite based on attapulgite clay/bacterial cellulose to remove Pb 2+ ion

A one‐pot biosynthesis of an aerogel composite based on attapulgite clay/bacterial cellulose to remove Pb ²⁺ ion

Investigation of the adsorption of copper and zinc ions by sorbents based on plant waste – cake and husk of sunflower seeds

Investigation of the adsorption of copper and zinc ions by sorbents based on plant waste – cake and husk of sunflower seeds. Nowadays water bodies contain a huge amount of pollutants that are products of human activity. Heavy metals exceeding the maximum permissible concentrations (MPC) are among the most common pollutants in wastewater. The most popular and effective ways to reduce the concentration of heavy metal ions in wastewater are sorption methods of purification. Therefore, there is an urge to create new adsorbents that have a lower price than existing on the market, as well as are effective and environmen-tally friendly. The aim of this work is to study the adsorption activity of waste based on husk (SH) and cake (SC) of sunflower seeds in relation to copper and zinc ions. The maximum degree of extraction using SH reaches (88 ± 3.43) % for Cu 2+ and (81.4 ± 5.53) % for Zn 2+ . Grinding the SH leads to an increase in the extraction degree up to (93 ± 2.57) % for Cu 2+ and to (89 ± 2.35) % for Zn 2+ . In the case of SC, the maximum extraction degree reaches (72 ± 4.98) % for Cu 2+ and (80 ± 3.07) % for Zn 2+ . Sorbents were modified in order to increase the extraction degree. The degree of extraction of Cu 2+ and Zn 2+ ions by SH carbonated coal reaches (95±2,29)% for Сu 2+ and (96±3,41)% for Zn 2+ . In the case of SC carbonated coal, the extraction degree reaches (93±2,98)% and (35±4,24)% for Cu 2+ and Zn 2+ respectively. The extraction degree of Cu 2+ and Zn 2+ ions by acid-treated SH and SC carbonated coals reaches 100%. As a result of studying the kinetics of the processes under study, it was found that the in-teraction is described by a pseudo-second order model in the case of the adsorption of: 1) Cu 2+ and Zn 2+ on the SH; 2) Cu 2+ on the SC. For the adsorption of Zn 2+ on the SC the pseudo-first order fits better. In the case of modified sorbents, the process is described by a pseudo-second order model for the adsorp-tion of : 1) Сu 2+ and Zn 2+ by acid-treated SH carbonated coal; 2) Сu 2+ and Zn 2+ by SC carbonated coal; 3) Zn 2+ ions by acid-treated SC carbonated coal; 4) Сu 2+ ions by SH carbonated coal. The pseudo-first order model describes the adsorption of Zn 2+ ions by HS carbonated coal and Сu 2+ ions by acid-treated CS carbonated coal. Key words: sunflower husk, sunflower cake, adsorption, copper ions, zinc ions, kinetics.

Selective Capacitive Removal of Heavy Metal Ions from Wastewater over Lewis Base Sites of S-Doped Fe–N–C Cathodes via an Electro-Adsorption Process

The pollution of toxic heavy metals is becoming an increasingly important issue in environmental remediation because these metals are harmful to the ecological environment and human health. Highly efficient selective removal of heavy metal ions is a huge challenge for wastewater purification. Here, highly efficient selective capacitive removal (SCR) of heavy metal ions from complex wastewater over Lewis base sites of S-doped Fe-N-C cathodes was originally performed via an electro-adsorption process. The SCR efficiency of heavy metal ions can reach 99% in a binary mixed solution [NaCl (100 ppm) and metal nitrate (10 ppm)]. Even the SCR efficiency of heavy metal ions in a mixed solution containing NaCl (100 ppm) and multicomponent metal nitrates (10 ppm for each) can approach 99%. Meanwhile, the electrode also demonstrated excellent cycle performance. It has been demonstrated that the doping of S can not only enhance the activity of Fe-N sites and improve the removal ability of heavy metal ions but also combine with heavy metal ions by forming covalent bonds of S- clusters on Lewis bases. This work demonstrates a prospective way for the selective removal of heavy metal ions in wastewater.

Corn bracts loading copper sulfide for rapid adsorption of Hg(II) and sequential efficient reuse as a photocatalyst.

Hg(II) ions in wastewater are highly toxic to the environment and human health, yet many materials to remove the ions exhibit lower adsorption efficiency, and few studies report the reuse of Hg(II)-loaded waste materials. Here, a cheap and efficient adsorbent was prepared for the removal of Hg(II) based on corn bracts (CB) loading copper sulfide (CuS), and the Hg(II)-adsorbed material was reused as a photocatalyst. By changing the adsorption variables such as pH, adsorbent dosage, Hg(II) concentration, contact time and coexisting ions, the optimum adsorption conditions were obtained. The study indicated the adsorption capacity and removal rate of CB/CuS reached 249.58 mg/g and 99.83% at pH 6 with 20 mg CB/CuS, 50 mL Hg(II) concentration (100 mg/L) and 60 min, and coexisting ions did not affect the uptake of Hg(II). The adsorption behavior of CB/CuS toward Hg(II) followed pseudo-second-order and Langmuir models, with the theoretical maximum adsorption capacity of 316.46 mg/g. Finally, we explored an alternative strategy to dispose of spent adsorbents by converting the CB/CuS/HgS into a photocatalyst for the degradation of rhodamine B, with a removal rate of 98%. Overall, this work not only develops a promising material for the treatment of Hg(II)-containing wastewater, but opens up a new approach for the use of the waste adsorbent.

Rapid Adsorption of Magnetite Nanoparticles from Recycled Mill Scale Waste as Potential Adsorbent for Removal of Cu(II) Ions

The present study was conducted to establish adsorbent potential of magnetite nanoparticle ferrous ferric oxide (Fe3O4) for removal of Cu(ll) ions in wastewater. In the study, Fe3O4 was prepared by synthesizing low-cost recycled mill scale waste in an aqueous solution. Samples of scale wastes were milled and ground using high-energy ball milling (HEBM) at three milling times of 5, 7 and 9 hours. Extraction of Fe3O4 was accomplished by magnetic separation technique (MST) and Curie temperature separation technique (CTST). The morphologies and structural properties of Fe3O4 were characterized by using X-ray powder diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and Fourier-transform infrared spectroscopy (FTIR). HRTEM yielded images in the range of 10-22 nm. Maximum adsorption capacity, qe,and percentage removal of Cu(II) ions were achieved at 4.45 mg/g and 62.61% respectively after 7 hours of milling time. The present study recorded the smallest particle size of Fe3O4 imparting high qe, and percentage removal of Cu (II) ion in an aqueous solution, suggesting its high adsorbent potential.

Decorating metal organic framework on nickel foam for efficient Cu2+ removal based on adsorption and electrochemistry

ABSTRACT The removal of heavy metal ions in wastewater has a great significance to human health and environment protection. Metal organic framework possesses high surface area, rich porosity, tunable pore size and abundant active sites. However, the intrinsic aggregation and fragility of MOF nanoparticles make its poor adsorption and undesirable reusage. Herein, a facile and unique hot-pressing method is adopted to decorate the MOF nanoparticles on nickel foam (ZIF-8/NF), which simultaneously serves as self-supporting substrate of ZIF-8 nanoparticles and electrode of a self-powered multifunctional purification system. In adsorption, the ZIF-8/NF composite presents high Cu2+ removal rate of 49.5% with the concentration of 10 mg/100 ml. More importantly, integrating with electrochemistry, the Cu2+ removal rate of the ZIF-8/NF composite reaches 54.7% in 5 min. The superior performance is attributed to the comprehensive effects of ion exchange, chemical bonding and physical adsorption. Moreover, the low-cost, fast and scalable preparation contributes to commercially fabricate MOF nanoparticles on self-supported substrate to treat wastewater with high efficiency and good recyclability.

Heavy Metal Ions in Wastewater Affect the Photodegradation of Phenol‐4‐sulfonic Acid over Biphasic TiO2/Activated Carbon Fiber Composites

AbstractThe effect mechanism of Cu2+, Zn2+ and Ni2+ ions in wastewater on photocatalytic activity remained unknown. For phenol‐4‐sulfonic acid (PSA) photodegradation, we fabricated anatase/rutile/activated carbon fiber composites (A/R/ACFs) by the hydrothermal deposition of rutile TiO2 nanorods and anatase TiO2 nanoparticles on ACFs. A/R/ACFs exhibited better photocatalytic activity than both R/ACFs and A/ACFs because anatase/rutile heterojunctions supported electron transfer from rutile to anatase. All Cu2+, Zn2+ and Ni2+ ions in wastewater improved the chemical stability of PSA by forming PSA‐Cu(II), PSA‐Zn(II) and PSA‐Ni(II) complex compounds, and thus inhibited the PSA photodegradation. Notably, the as‐formed photoelectrons over A/R/ACFs were partly consumed due to the reduce reaction of Cu2+ ions into Cu+/Cu0, avoiding electron‐hole recombination and improving PSA photodegradation efficiency. No reduce reaction of Zn2+ and Ni2+ ions occurred during the PSA photodegradation process. Hence, the A/R/ACFs are an effective photocatalyst for wastewater purification, and low Cu2+ concentrations facilitated the PSA photodegradation.

Cu(II) and Cd(II) capture using novel thermosensitive hydrogel microspheres: adsorption behavior study and mechanism investigation

AbstractBACKGROUNDAt present, various kinds of hydrogel adsorbents are applied to the treatment of heavy metal ions in wastewater. In this work, we focused on the adsorption of cadmium [Cd(II)] and copper [Cu(II)] onto microspheres of a novel thermosensitive hydrogel (NH2‐SA/PNIPA, aminated sodium alginate/poly‐N‐isopropyl acrylamide), studied the effect of temperature on the phase transition of the hydrogel in detail, and discussed the influence on the adsorption behavior of metal ions in the hydrogel.RESULTSThe NH2‐SA/PNIPA exhibited a higher adsorption efficiency under the conditions of interfering monovalent cationic and neutral pH. The adsorption capacities based on the Langmuir model were 57.2 mg g–1 for Cu(II) and 100.5 mg g–1 for Cd(II) at 20 °C, respectively. Higher temperature facilitated the adsorption process and also led to the volume shrinkage and hydrophobicity of NH2‐SA/PNIPA. The metal ions had different hydration and hence different adsorption capacities, of 56.7 mg g–1 for Cu(II) and 88.6 mg g–1 for Cd(II) at 40 °C. The results of diffusion behavior analysis showed that the diffusion coefficients were ≈1 × 10−11 m2 s–1. The adsorption performance of NH2‐SA/PNIPA hardly decreased even after five cycles. In addition, the adsorption process was controlled mainly by the complexation reaction.CONCLUSIONThe novel hydrogel microspheres overcame the deficiency of conventional adsorbents and possessed high diffusibility. This work provides a theoretical basis and empirical evidence for enhancement of adsorbents for removing heavy metals in wastewater. © 2021 Society of Chemical Industry (SCI).

Controllable Preparation of Cu-MOF-Coated Carboxyl Filter Paper for Simultaneous Removal of Organic Dye and Metal Ions

A composite paper was designed in order to remove dyes and heavy metal ions in wastewater, which was prepared by assembling NH2-Cu-BDC layer by layer on the surface of the carboxymethyl-modified fi...

A Suitable Combination of Electrodes for Simultaneous Reduction of Nitrates and Oxidation of Ammonium Ions in an Explosive Industry Wastewater

The electrochemical reduction of nitrate and ammonium ion oxidation has been performed with the cathode (Al) and anode (Ti/RuO₂) in the explosive industry wastewater polluted with a significant quantity of NO₃– and NH₄⁺. For this, the influences of various other cathode materials (Fe, Cu, and C), the current density (j = 35.71 to 142.86 A m–²), wastewater pH (pH = 3–12), and treatment time (t = 180 min) were analyzed for nitrate ion reduction, ammonium ion oxidation, nitrite ion generation, and total nitrogen (TN) degradation. The maximum nitrate removal and TN removal efficiencies were found to be ≈51 and ≈63% at j = 142.86 A m–² and wastewater natural pH after 180 min treatment time, respectively. In this condition, SEC was calculated to be 74.4 kWh (kg NO₃– reduced)⁻¹. The mechanistic analysis suggested that the atomic hydrogen molecules, H⁺, and e– help in the nitrate ion reduction and the available Cl– ion in the wastewater helps in the oxidation of the ammonium ion into gaseous nitrogen through the electrochemical process. The new and used electrodes were characterized by FE-SEM, AFM, and XRD techniques. Electrodes were also characterized within untreated and treated wastewater through CV and EIS analysis. The in situ generated oxidizing species were identified by the p-nitrosodimethylaniline (RNO) bleaching test. Pseudo-first-order and nᵗʰ-order kinetic models were applied, and the reaction rate was calculated to understand the reaction rate of the nitrate reduction. The approximate operational cost estimation has been performed for the lab-scale batch reactor treatment of the explosive industry wastewater. No scum or sludge was produced throughout the treatment process. This study helps to understand the parametric, mechanistic, and kinetic aspects of electrochemical nitrate reduction and oxidation of the previously present and produced ammonium ion in the explosive industry wastewater.

A novel graphene oxide-dicationic ionic liquid composite for Cr(VI) adsorption from aqueous solutions

A novel graphene oxide-dicationic ionic liquid composite (GO-DIL) was prepared by modifying graphene oxide (GO) with a dicationic ionic liquid (DIL), 3,3′-(butane-1,4-diyl) bis (1-methyl-1H-imidazol-3-ium) chloride ([C4(MIM)2]Cl2). GO and GO-DIL were characterized by SEM, BET, FTIR, and XPS, and the materials were used for Cr(VI) adsorption. Batch adsorption studies showed that adsorption reached equilibrium within 40 min, and the optimal pH was 3, where the electrostatic attraction between GO-DIL and Cr(VI) was maximized. The maximum theoretical Cr(VI) adsorption capacity (qm) was 271.08 mg g−1, and qm remained above 228.00 mg g−1 after five cycles. The adsorption data were fitted well by both the pseudo-first-order kinetic model and the Langmuir model. Furthermore, thermodynamics calculations revealed that adsorption was a spontaneous endothermic process. Importantly, electrostatic attraction between Cr(VI) and the protonated imidazole N+ of GO-DIL played a critical role in Cr(VI) adsorption, and Cr(VI) was reduced to Cr(III). Thus, GO-DIL is predicted to be an effective adsorbent for Cr(VI) and other heavy metal ions in wastewater.

PENJERAPAN ION Pb DALAM ZEOLIT-Na

Sorption process is have been known for a long time and utilised for removal metal ion from solution. Natural zeolite can be used as adsorbent for heavy metal ion in waste water. The using of activated natural zeolite in the sorption process needs some information of the sorption characteristic. The objective of this research was to study the sorption characteristic in the equilibrium process. The batch equilibrium test was conducted at constant temperature by contacting a certain amount of zeolite-Na with the heavy metal salt solution in an elenmeyer flask. A series of erlenmeyer flasks containing different salt solution concentration placed in a shaker bath. Tha effect of temperature was studied at 27, 35, and 50 oC. The results show that sorption of Pb ions can be viewed as adsorption process either ion exchange process. At higher temperatur, more Pb ions can be adsorp by zeolite-Na.

Kinetics, isotherm and chemical speciation analysis of Hg(Ⅱ) adsorption over oxygen-containing MXene adsorbent

A facile method was used to prepare two-dimensional MXene for the treatment of heavy metal ions in wastewater. The adsorbent has good selectivity for the adsorption of Hg (Ⅱ) in mixed divalent cationic metal solutions due to a large number of oxygen-containing functional groups on the surface of the material. The adsorption of mercury was tested using mercuric chloride and mercury nitrate solutions. The Langmuir maximum adsorption capacity of the adsorbent at a pH of 5.0 and a temperature of 30 °C is 1057.3 mg/g (mercuric nitrate) and 773.29 mg/g (mercuric chloride), respectively. The adsorbent also maintains a high adsorption capacity at low pH (pH = 2.0). The removal rate of mercury-containing wastewater within 100 mg/L is nearly 100%. The chemical species of Hg-containing ions at different pH and temperatures was studied. It was found that the adsorbent could maintain a high adsorption capacity for different forms of Hg-containing ions.