JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xiaofei Liu,Hua Yin,Hang Liu,Yuhao Cai,Xin Qi,Zhi Dang
Due to the coexistence of various heavy metals in the contaminated environment, it is essential to comprehensively study the multicomponent adsorption of heavy metals in order to tackle these combined pollutants. Herein, the adsorption processes of Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) by biogenic hydroxyapatite (BHAp) were investigated in single and multicomponent systems. The maximum adsorption capacity for Pb(Ⅱ), Cu(Ⅱ) and Cd(Ⅱ) by BHAp in single system reached 311.16, 82.05 and 92.54 mg g −1 , respectively, while adsorption capacity for Cu(Ⅱ) and Cd(Ⅱ) in multicomponent system decreased more obviously than that of Pb(Ⅱ). Furthermore, the stability of Cu(Ⅱ) and Cd(Ⅱ) adsorbed on BHAp was indeed influenced in multicomponent system. By means of the characterization analysis, it was found that ion exchange was more instrumental in the adsorption processes of Cu(Ⅱ) and Cd(Ⅱ) in single system than in multicomponent system. Significantly, it was observed that the proportion of generally stable Pb(II) adsorbed on BHAp exceeded 95% in both single and multicomponent systems. This result might be due to the in-site growth of stable crystals of Pb x Ca 10–x (PO 4 ) 6 (OH) 2 , which was synergistically induced by surface functional groups and inorganic mineral of BHAp, and was unaffected by the coexistence of Cu(Ⅱ) and Cd(Ⅱ).
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Long Li,Yi Qian,Haiming Zhang,Haoyue Han,Peng Qiao
A novel silica gel-based absorbent SG-GA, capable of selective adsorption of Pb(II) from an aqueous solution containing mixed metal ions of Cr(VI) and Cu(II), was prepared by grafting of a Schiff base glutaraldehyde (GA) ligand onto the surface of a modified silica gel. The functionalized silica gels were characterized by Fourier-transform infrared spectroscopy, thermogravimetric analysis, and porous structure analysis. The effect of pH, contact time, the concentration of Cr(VI) and Cu(II), and initial Pb(II) concentration parameters on the adsorption of Pb(II) ions were investigated. The effective pH range for selective Pb(II) adsorption was in the region 3~8. The adsorption study showed that SG-GA had good adsorption efficiency for Pb(II), and the maximum adsorption capacity was 19.96 mg g –1 . The adsorption kinetics of Pb(II) followed the pseudo-second-order kinetic models and the adsorption isotherms fitted well by Langmuir models, these results implied that the absorption selectivity may be tuned by modifying the structural conformation for the sites of metal ion binding through complexion. This study provides interesting material for selectively and effectively remove Pb(II) from water effluents containing mixed metal salts.
研究领域:
环境化学
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材料科学
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分析化学
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环境污染控制
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重金属吸附
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DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 1
·1-13
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IF 3.8
Wang Degui,Xiao Qiuying,Xiao Yepeng,Cheng Lihua,Chen Hong,Chen Bing,Wang Suhua
Since lead is a non-biodegradable and neurotoxic heavy metal, efficient removal of Pb(II) from water is of great significance. Herein, a new type of functional cellulose with enriched thiourea groups (Thiourea-PC) was synthesized using the leaves of plumeria frangipani, a common agricultural solid waste, as the starting materials and applied for the efficient removal of lead ions from water. The properties of the cellulose-based adsorbent have been carefully analyzed and evaluated using FT-IR, SEM, XPS, and elemental analysis techniques. The results showed that the maximum adsorption capacity of Thiourea-PC was 173.92 mg/g under the optimal conditions. The adsorption mechanism was attributed to the complex reaction between Pb(II) and mercaptan/nitrogen-containing groups, and the adsorption process conformed to Langmuir isothermal adsorption model and Pseudo-second-order kinetic model. It is worth noting that after five cycles of adsorption–desorption, the removal rate of Pb(II) by Thiourea-pc was still high, reaching more than 97%, and it had been successfully applied to the simulated adsorption of actual water samples with excellent selectivity. Adsorbent precursors come from a wide range of sources, are economical and effective, and the resource utilization of biomass waste can be realized through sustainable synthesis.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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吸附
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重金属去除
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生物质利用
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DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Si Liu,Jinhui Huang,Lixiu Shi,Wenjuan He,Wei Zhang,Enjie Li,Chenyu Zhang,Haoliang Pang,Xiaofei Tan
In this study, the impact of surfactants on the adsorption behavior of Pb(II) onto microplastics-sediment (MPs-S) complexes was investigated. Firstly, virgin polyamide (VPA) and polyethylene (VPE) were placed in Xiangjiang River sediment for six months to conduct in-situ aging. The results indicated that the biofilm-developed polyamide (BPA) and polyethylene (BPE) formed new oxygen-containing functional groups and different biofilm species. Furthermore, the adsorption capacity of Pb(II) in sediment (S) and MPs-S complexes was in the following order: S > BPA-S > VPE-S > VPA-S > BPE-S. The addition of sodium dodecyl benzenesulfonate (SDBS) promoted the adsorption of Pb(II), and the adsorption amount of Pb(II) increased with the higher concentration of SDBS, while adding cetyltrimethylammonium bromide (CTAB) showed the opposite result. The adsorption process of MPs-S complexes to Pb(II) was dominated by chemical adsorption, and the interaction between MPs-S complexes and Pb(II) was multilayer adsorption involving physical and chemical adsorption when the surfactants were added. Besides, the pH exerts a significant effect on Pb(II) adsorption in different MPs-S complexes, and the highest adsorption amount occurred at pH 6. Noteworthy, CTAB promoted the adsorption ability of Pb(II) when the exogenous FA was added. The binding characteristic of sediment endogenous DOM components and Pb(II) was influenced by the addition of MPs and surfactants. Finally, it confirmed that adsorption mechanisms mainly involve electrostatic and hydrophobic interaction. This study provides a new perspective to explore the environmental behaviors of Pb(II) by MPs and sediments with the addition of surfactants, which was conducive to evaluating the ecological risks of MPs and heavy metals in aquatic environments.
研究领域:
环境科学
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生态学
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产品关联
DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2018
·
IF 3.849
Tao Li,Shaoyu Lü,Shaofei Zhang,Chunmei Gao,Mingzhu Liu
Excessive application of fertilizers and their losses have exerted a great threat on soil environment. Slow- or controlled-release fertilizers have been widely produced to alleviate the problem. However, most of them can not remedy contaminated soil environment, and even make it worse. To improve nutrient use efficiency and reduce soil environmental pollution, lignin, an extensive biomass source, was used to synthesize a lignin-based superabsorbent (LPA), which was then introduced into the fertilizer as an outer coating material to obtain lignin-based multifunctional fertilizer (LMF). Results showed that the introduction of LPA can improve water-holding and water-retention capacity of soil and nutrients release behavior of fertilizers. The cumulative release rates of nitrogen, phosphorus and zinc were 79.5%, 46.7% and 60.1% after 25 days, respectively. Additionally, LMF can efficiently immobilize and restrict the migration of bivalent lead (Pb(II)) by complexation with lignin. About 91.7% of Pb(II) was immobilized after soil-sand mixture with Pb(NO 3 ) 2 was treated by LMF. The pot experiments indicated that the LMF exhibited a positive effect on the growing of corn in Pb(II)-contaminated soil. Therefore, this work provides a promising fertilizer to improve the utilization efficiency of water, sustained release of nutrients, and immobilization of Pb (II) in contaminated soil.
研究领域:
环境科学
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农业科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Shu-Cui Ma,Ji-Lin Zhang,De-Hui Sun,Gui-Xia Liu
Removal of noxious heavy metal ions (e.g. Pb(II)) by surface adsorption of minerals (e.g. diatomite) is an important means in the environmental aqueous pollution control. Thus, it is very essential to understand the surface adsorptive behavior and mechanism. In this work, the Pb(II) apparent surface complexation reaction equilibrium constants on the calcined diatomite and distributions of Pb(II) surface species were investigated through modeling calculations of Pb(II) based on diffuse double layer model (DLM) with three amphoteric sites. Batch experiments were used to study the adsorption of Pb(II) onto the calcined diatomite as a function of pH (3.0–7.0) and different ionic strengths (0.05 and 0.1 mol L −1 NaCl) under ambient atmosphere. Adsorption of Pb(II) can be well described by Freundlich isotherm models. The apparent surface complexation equilibrium constants (log K ) were obtained by fitting the batch experimental data using the PEST 13.0 together with PHREEQC 3.1.2 codes and there is good agreement between measured and predicted data. Distribution of Pb(II) surface species on the diatomite calculated by PHREEQC 3.1.2 program indicates that the impurity cations (e.g. Al 3+ , Fe 3+ , etc.) in the diatomite play a leading role in the Pb(II) adsorption and dominant formation of complexes and additional electrostatic interaction are the main adsorption mechanism of Pb(II) on the diatomite under weak acidic conditions.
研究领域:
环境科学
·
化学
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产品关联
DOI
高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2017
·
IF 0.754
Ting Guo,Chaoke Bulin,Bo Li,Zhiwei Zhao,Huitao Yu,He Sun,Xin Ge,Ruiguang Xing,Bangwen Zhang
Partially reduced graphene oxide-Fe3O4 composite was prepared through in situ co-precipitation and used as an efficient adsorbent for removing Pb(II) from water. The composites were characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectra, Fourier transformation infrared, Raman spectrometer, N2 adsorption–desorption, vibrating sample magnetometer, and zeta potential analyses. The impacts of pH, contact time, adsorbent dosage, temperature, and foreign substances on Pb(II) adsorption performance were investigated. The adsorption mechanism, kinetics, and thermodynamics were analyzed. The results indicate that Fe3O4 is homogeneously anchored inside the thin graphene sheets, with a particle size of 15–20 nm, resulting in a very low remanence and coercivity. The composite shows excellent and efficient adsorption performance toward aqueous Pb(II): adsorption equilibrium was reached in 10 min with the adsorption percent and quantity of 95.77% and 373.14 mgċg−1, respectively, under a condition of pH = 6, adsorbent dosage 250 mgċL−1, and Pb(II) initial concentration 97.68 mgċL−1, with the subsequent magnetic separation taking only 10 s. The adsorption performance is dependent on adsorbent dosage. A lower dosage favors a higher adsorption quantity, implying a strong adsorptive potential for partially reduced graphene oxide-Fe3O4. The adsorption quantity reached 777.28 mgċg−1, given the dosage 100 mgċL−1. The adsorption is monolayer chemisorption, the whole process of which is controlled by chemisorption and liquid film diffusion. In terms of thermodynamics, the adsorption is an exothermic and spontaneous process.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 28
·72354-72367
·
IF 5.8
Zhou Tao,Lu Linghong,Tao Suwan,Ma Yi
In this work, we synthesized activated alumina biochar composites (γ-Al 2 O 3 /BC) by sol–gel method, which improved the problem that the surface charge of γ-Al 2 O 3 was not conducive to the removal of heavy metal cation in a neutral solution, and then explored the feasibility of removing Pb(II) by γ-Al 2 O 3 /BC as well as reusing Pb-laden waste sludge to remove phosphorus (P) and its micro-adsorption mechanisms. The results show that the maximum adsorption capacity of γ-Al 2 O 3 /BC for Pb(II) is 182.48 mg/g, and the removing capacity of recycled Pb-laden slag for P also reaches 87.13 mg/g. It was found that the presence of Pb in the slag makes P removal more effective. In addition, in the process of P removal, the Pb in the slag will not be released, which will not cause secondary pollution to the water. The micro-adsorption mechanism of Pb(II) and P on the composites was investigated by XPS, XRD, and FTIR. It demonstrates that special functional groups such as hydroxy-aluminum, hydroxyl, and carboxyl groups can remove Pb(II) through strong surface complexation and electrostatic attraction. Furthermore, the removal mechanism of P from Pb-laden sludge includes chemisorption and complexation, and the precipitation of P and Pb on the adsorbent surface is the main reason for the removal of P. Therefore, it is feasible to further effectively remove P by using the waste biochar containing Pb. The idea of this paper provides a potential method for the reuse of waste adsorbent.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Membranes
·
2025
·Vol. 15
·期 9
·271
·
IF 3.6
Jie Xu,Jinxin Liu,Mei-Ling Liu,Guangze Nie,Dong Zou
Membrane distillation demonstrates ideal separation performance towards saline water; however, it fails to accomplish the classification and recovery of multiple components from complex saline solutions (i.e., heavy metal ion-laden saline water in process industries). Herein, an adsorption–membrane distillation (MD) coupling process was proposed, as an example of a Pb(II)/NaCl mixed solution, in which the prepared adsorption membrane was firstly employed to adsorb heavy metal ions in the mixed solution and then the brine was concentrated by the MD process to realize water source recovery and utilization. Firstly, an FeOOH@PVDF adsorptive membrane was fabricated to adsorb Pb(II) ions. It was demonstrated that chemical adsorption was identified as the dominant mechanism, and the composite membrane showed excellent selective adsorption for Pb(II). Following this, the omniphobic membrane was then employed to concentrate the Pb(II)-removed saline solution, maintaining a water flux of 16.12 kg·m−2·h−1at a concentration factor of 7.7, demonstrating excellent MD concentration performance. Through this coupled process, the saline wastewater containing heavy metal ions was successfully separated into purified water and concentrated brine without heavy metal ions, providing a novel approach for the treatment and recycling of complex saline wastewater.
研究领域:
环境工程
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化学工程
·
材料科学
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水处理技术
·
分离科学
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产品关联
DOI
PubMed
高影响因子
SUPRAMOLECULAR CHEMISTRY
·
2011
·
IF 1.94
Jing Cao,Hai
Yan Deng,Chen
Hui Wang,Yao Xiao,Ming Ren,You
Wei Zhang
A 3,4-dimethylthieno[2,3-b]thiophene-based fluorogenic probe bearing benzo[d]-thiazole-2-thio unit (sodium 3,4-bis ((benzo[d]thiazol-2-ylthio)methyl) thieno [2, 3-b]thio-phene-2, 5-dicarboxylate) was developed as a novel fluorescent chemosensor with high selectivity towards Pb(II) over other cations tested. The new probe exhibited good water solubility and only sensed Pb(II) among metal ions examined in neutral 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid buffer solution. The selectivity and sensitivity of fluorogenic probe to Pb(II) were discussed on the basis of experimental results.
研究领域:
分析化学
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环境科学
·
传感器与探针
·
无机化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Hong Zeng,Yue Tang,Wenying Zou,Chunxiao Wang,Han Tao,Yuangen Wu
V6O13 nanobelts with good crystallinity and distinct facets were prepared by a facile one-pot hydrothermal method and were first found to possess the peroxidase-mimicking activity. A simple colorimetric sensor using V6O13 nanobelts as catalyst was established for detecting Cd(II) and Pb(II) simultaneously in actual water samples. It was confirmed that V6O13 nanobelts could generate hydroxyl radicals (·OH) from H2O2 to oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue product. Heavy metals such as Cd(II) or Pb(II) could inhibit the peroxidase-mimicking activity of V6O13 nanobelts, making the sensing solution light blue or even colorless. The catalytic reaction of V6O13 nanobelts was exhibited to be a ping-pong mechanism, and the effect of heavy metals on V6O13 nanobelts was consistent with noncompetitive inhibition. The absorbance variation of a colorimetric sensor is relevant to the amount of heavy metals, which enabled us to easily discriminate whether Cd(II) or Pb(II) exceeded the maximum permissible quantity within 20 min. The limit of detection (LOD) of the constructed colorimetric sensor was determined to be 1.89 μg·L–1 for Cd(II) and 2.11 μg·L–1 for Pb(II). The colorimetric sensor showed distinguished selectivity for other competitive metal ions and was validated for detecting heavy metals in several types of actual water samples.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Haoran Shi,Jie Chen,Dongyang Han,Changhui Wang,Wenjun Huang,Jiandong Zhuang,Yan Yu,Xuexia Zhang
Metal-organic framework (MOF)-loaded cellulose aerogels show considerable promise for remediating water polluted by heavy metal ions. However, their practical application has been limited by energy-intensive drying methods and suboptimal performance. Herein, a low-cost, scalable preparation strategy to fabricate a MOF-loaded cellulose aerogel (denoted as b-CAT-Z) via ambient drying, employing bidirectional freezing combined with solvent exchange, without the need for toxic crosslinking agents. Specifically, tannic acid (TA)-modified cellulose nanofibers (CNF) and aramid nanofibers (ANF) form a robust skeleton, while MOFs (ZIF-8) anchored via hydrogen bonding and coordination interactions serve as nanofillers to enhance Pb(II) adsorption. The optimized b-CAT-Z aerogel exhibited an ultra-low density (20.3 mg/cm 3 ) and excellent mechanical properties, with a specific strength of 10.93 kN·m/kg. More importantly, benefiting from the construction of long-range ordered water transport channels, the b-CAT-Z aerogel prepared via bidirectional freezing demonstrates outstanding performance in adsorbing Pb(II), exhibiting a superior adsorption capacity (584.4 mg/g), removal efficiency (97.4%), and adsorption kinetics (reaching equilibrium within 180 min). These properties confer significant advantages over its counterparts prepared by random freezing (441.0 mg/g, 300 min) and unidirectional freezing (514.9 mg/g, 300 min). Remarkably, the b-CAT-Z aerogel still maintains a Pb(II) removal efficiency as high as 80.3% even after six adsorption-desorption cycles. Density Functional Theory (DFT) calculations revealed that the oxygen-containing and imidazole groups in b-CAT-Z strongly bind Pb(II), acting as efficient adsorption sites. The b-CAT-Z aerogel demonstrated favorable recyclability. This work presents an ambient-dried strategy for fabricating high-performance cellulose aerogels, providing valuable insights for designing next-generation heavy metal adsorbents.
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DOI
高影响因子
危险品化学品经营许可证（带存储）