ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chi Ma,Chenyu Qi,Dingbo Wei,Zhenzhen Jiang,Yafei Guo,Nelson Belzile,Tianlong Deng
The efficient and renewable recovery of cesium and strontium by absorption from a new type of geothermal water liquid mineral resource is highly desirable but still challenging. In this work, a new Zr-doped layered potassium thiostannate adsorbent (KZrTS) was first synthesized and used for Cs+ and Sr2+ green and efficient adsorption. It was found that KZrTS had very fast adsorption kinetics toward both Cs+ and Sr2+ with an equilibrium reached within 1 min, and the theoretical maximum adsorption capacities for Cs+ and Sr2+ were 402.84 and 84.88 mg/g, respectively. Moreover, to solve the loss problem of the engineering application of the powdered adsorbent KZrTS, KZrTS was uniformly coated with polysulfone by wet spinning technology to form micrometer-level filament-like absorbents (Fiber-KZrTS), whose adsorption equilibrium rates and capacities toward Cs+ and Sr2+ are almost the same as that of powder. Furthermore, Fiber-KZrTS showed excellent reusability, and the adsorption performance remained virtually unchanged after 20 cycles. Therefore, Fiber-KZrTS has potential application for green and efficient cesium and strontium recovery from geothermal water.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xuezhen Wang,Xiaotong Jiang,Junmin Wu,Kaiyu Zhao,Yafei Guo,Tianlong Deng,Xiaoping Yu
With the development of new energy industry, the extraction of lithium from liquid minerals has attracted extensive attention. Herein, a novel phenolic resin-supported H 2 TiO 3 foam (RF/UF-HTO) was developed for Li + recovery from aqueous solutions. It was found that when the thermosetting phenolic resin was modified with urea and then foamed by petroleum ether with boiling points of 60 ∼ 90 °C under the assistance of 1.5% Tween 80 + 3% sodium dodecyl sulfate, the material presented a porous 3D network structure with a high specific surface area and porosity. The maximum adsorption capacity of the material reached 52.41 mg·g −1 . The adsorption rate was controlled by the particle diffusion, and the adsorption was proven to be an endothermic process by the microcalorimetry. The material exhibited high adsorption performance for low-concentration Li + in geothermal water with a low degree of mineralization. The adsorption capacity reached 21.50 mg·g −1 after only 6 h, and the attenuation of adsorption capacity was only 1.96 mg·g −1 after 10 cycles. Because of the high Mg 2+ concentration and high degree of mineralization, the adsorption capacity for Li + in salt lake brine was low. This problem was successfully solved by regeneration with Ba(OH) 2 , by which the adsorption capacity was enhanced from 0.54 to 20.72 mg·g −1 . Even for the fixed-bed adsorption, the adsorption capacity still reached 8.5 mg·g −1 . Based on these excellent properties, the material and method developed in this work can be used for Li + recovery from brine with different degrees of mineralization and composition.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2019
·
IF 5.839
Peiyuan Zhou,Mohamed Eid,Wenfei Xiong,Cong Ren,Tingyang Ai,Ziyu Deng,Jing Li,Bin Li
Cold and hot water extracted polysaccharides (CP and HP) were isolated from Plantago ovata seed husk at 25 and 85 °C, respectively. Their rheological properties were systematically investigated and compared. Different concentrations and temperatures were studied to evaluate the viscoelastic properties of the two fractions. It was found that CP solutions behaved as viscous fluids, while HP solutions preferred to exhibit as gel-like structure. The sol-gel transition process of HP was evaluated and the gel point was determined to be 4.8 mg/mL by Winter-Chambon method in water at 25 °C. The steady flow sweep investigated the viscosity properties of CP solutions and two critical concentrations were found, which locating the transition from the dilute to semi-dilute region, and from the semi-dilute to concentrated region. In addition, the two fractions could form thermo-reversible weak gels, and the gelation temperatures of them increased with the increase of concentration. It is evident that both polysaccharides have significant potential for application in food industry.
研究领域:
食品科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Wang Xuchong,Wei Yuhe,Sun Xiaoping,Yuan Juan,Chen Haoqiu,Sun Yanfen,Luo Lianxin
Pretreatment is the key step in enzymatic hydrolysis of bamboo wood. Green liquor pretreatment is a promising method to improve enzymatic hydrolysis and saccharification efficiency by changing the physical and chemical properties of lignocellulose surface. At present, there is little work to quantitatively analyze the enzymatic saccharification rate of bamboo lignocellulose by two-stage pretreatment. In this study, a two-stage pretreatment method combining hot water and green liquid phase was mainly used, and the bamboo was treated with Bovine serum albumin (BSA) and Tween80 (TW) chemical additives. After that, the treated samples were hydrolyzed by cellulase, and the effects of pretreatment on the chemical composition and physical properties of bamboo and the influencing factors of chemical additives on the enzymatic hydrolysis efficiency of bamboo were explored. The results showed the two pretreatment stages of hot water and green liquid to have an evident effect on the enzymatic hydrolysis of bamboo. The two-stage pretreatment with hot water and green liquid (14% total alkali) resulted in an 85.51% yield of total sugar hydrolyzed by the enzyme. The addition of BSA and Tween80 improved the efficiency of the enzymatic hydrolysis of bamboo, and the synergistic effect of them could make the total sugar yield of enzymatic hydrolysis reach 99.67%. Through calculation, 65.88 g of fermentable sugar can be obtained per 100 g of bamboo fiber through enzymatic hydrolysis with cellulase. Graphical Abstract
研究领域:
生物化学
·
可再生资源与环境
✓ 已验证
产品关联
DOI
高影响因子
Environmental Earth Sciences
·
2022
·Vol. 81
·期 16
·1-12
·
IF 3.119
Feng Wenchao,Wu Jun,Lu Jian
The high concentration of manganese (Mn 2+ ) in geothermal water will seriously reduce its utilization rate. Manganese sand has been used to rapidly remove Mn 2+ from water. This study investigated the long-term removal of Mn 2+ from simulated geothermal water by manganese sand filtration column system. The average Mn 2+ removal rate from simulated water with the inlet water temperature of 25, 50, 70 °C were 87.4%, 96.2% and 99.0% during the operation of 90 days. The effluent pH did not change much compared with influent pH value (7.6–8.0). The Mn 2+ removal rates during the operation of 90 days with influent concentration of 1, 10, 20 and 50 mg/L were respectively 98.2%, 99.8%, 91.4% and 63.4%. The average removal rates of Mn 2+ were respectively 99.8% and 94.0% with the influent flow of 5.2 mL/min and 10.4 mL/min. The temperature change in the manganese sand filtration column was further explored in this paper. The experiment of filtration column heated/non-heated showed that the manganese sand filtration column heated had a better effect of removal which could run for 152 days. The dispersion coefficient ( D ) analysis derived from inverse modeling showed that a small temperature change in the filtration column system was conducive to the homogenization of manganese sand medium in the column. The Mn 2+ removal process of manganese sand filtration column heated was proposed. Surface characteristics analysis of manganese sand in the column after reaction showed that Mn 2+ removal mainly occurred in the upper part of the filter column. The surface material of manganese sand in the filtration column heated after operation was manganese oxide material mainly composed of Mn 2 O 3 and MnO 2 . These findings suggested the potential of manganese sand in the engineering application of removing Mn 2+ in geothermal water.
研究领域:
环境科学
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水处理工程
✓ 已验证
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 7
·1421
·
IF 3.2
Wei Li,Yi Wu,Ruiqing Huang,Chen Yang,Mei Zhang,Pengchen Xie,Jian Xiong,Xuebin Lu
Municipal sludge was pyrolyzed to produce sludge-derived biochar (SBC), which was subsequently modified with lanthanum nitrate. Through orthogonal experiments, the optimal preparation conditions for La-SBC-700 were determined. The morphological and textural properties of the biochar material, such as specific surface area, were characterized and batch adsorption experiments simulating fluoride-containing wastewater were conducted to investigate the effects of pH, fluoride concentration, biochar dosage, and coexisting ions on the fluoride removal performance of La-SBC-700. The application potential of the biochar material in real geothermal water was also assessed. The results indicated that La-SBC-700 prepared under optimal conditions exhibited an adsorption capacity approximately 10 times higher than that of the pristine biochar (SBC). The adsorption process was stable within the pH range of 5.0 to 8.0 and conformed to the Quasi-secondary-order kinetic and Langmuir isotherm models, with a maximum theoretical adsorption capacity of 40.338 mg/g. The adsorption process was spontaneous and endothermic.NO3−and Cl−had negligible effects on fluoride removal, whereasCO32−,SO42−, andHCO3−exerted varying degrees of influence on the adsorption process. La-SBC-700 demonstrated excellent performance in removing fluoride from geothermal water, providing a reference method for the resourceful utilization of sludge and the removal of fluoride from geothermal water.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2012
·
IF 4.98
Weina Liu,Yucui Hou,Weize Wu,Muge Niu,Wenhua Wang
Efficient pretreatment is important for complete enzymatic conversion of lignocellulosic materials. Pretreatment of wheat straw with sulfur dioxide (SO 2 ) dissolved in hot water achieved xylose and total product yields of up to 61.1% and 93.9%, respectively, based on the mass of lignocellulose in wheat straw. The apparent activation energies for hemicellulose conversion and xylose dehydration were 7.8 and 9.0 kJ/mol. FT-IR spectra of the residual solid after treatment showed that the hemicellulosic components were converted, the hydrogen bonds in cellulose were broken, but the lignin structure was not changed. Importantly, the SO 2 was recovered from the product mixture by steam stripping and could be reused. Thus, the SO 2 –H 2 O system is an efficient and environmentally friendly way for the conversion of hemicellulose in wheat straw into monosaccharides, such as xylose, glucose and arabinose.
研究领域:
生物化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Wendong Shi,Lei Wang,Baiyang Chen
Haloacetonitriles (HANs) are a group of nitrogenous disinfection by-products (DBPs) commonly found in treated water with potential carcinogenic, cytotoxic, and genotoxic risks. In order to control HANs and understand their real intake levels by people via drinking water , this study evaluated a list of structural, operational, and environmental factors affecting the treatment of HANs by two domestic heating devices, i.e., an electric boiler and a microwave oven. Results show that the concentrations of HANs decreased exponentially over time with increasing temperature, water turbulence, and bubbles, and the phenomena were most likely due to a combined effect of volatilization and hydrolysis. Among HANs, the lability increased with increasing halogenation degrees (i.e., tri- > di- > mono- HANs) yet decreasing halogen molecular weights (i.e., Cl- > Br- > I- HANs); such trends were well captured by quantitative structure activity relationship models (R 2 = 0.99). Operational factors played critical roles in controlling HANs too, including the rate of heating, water volume, water temperature at time of pouring, cooling method, and capping condition, suggesting that people could benefit from proper handling methods and procedures. In addition, HANs added to tap water exhibited higher removals than those added to ultrapure water, probably because of the presence of free chlorine in tap water.
研究领域:
环境科学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Food Engineering
·
2020
·Vol. 16
·期 11
·
IF 1.022
Jitian Song,Shi Dongqi,Su Hang,Feng Yongxia,Tian Wei
Ultrasonic extraction was a new development method to achieve high-efficiency extraction of Lycium barbarum polysaccharides instead of hot water extraction. In this paper, the single factor method combined with the box Behnken design of response surface method was used to study the influence of extraction time, extraction temperature, material liquid ratio and ultrasonic power on the extraction rate of L . barbarum polysaccharide. The results indicated that the best extraction rate of L . barbarum polysaccharide was 12.54 ± 0.12% under the conditions of 80 min for extraction time, 73 °C for extraction temperature, 1 g:38 mL for material to liquid ratio, and 185 W for ultrasonic power. Under the same operating conditions, the yield of L . barbarum polysaccharide using ultrasonic extraction was 83.3%, which was higher than that hot water extraction. Moreover, the extraction time of ultrasonic extraction was only 47% of that using hot water extraction. This suggested that there was great potentials of using ultrasonic extraction in the realization of high-efficiency extraction of L. barbarum polysaccharide. The results of this study could also provide a theoretical basis for the coupling of ultrasonic extraction and ultrasonic concentration process to develop the integrated equipment of both ultrasonic extraction and ultrasonic concentration.
研究领域:
食品科学
·
植物化学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Zhenzhen Jiang,Chi Ma,Yanqing He,Mingli Li,Gaoling Liu,Yafei Guo,Duo Ji,Tianlong Deng
To develop a green and efficient cesium adsorbent with high adsorption capacity , rapid kinetics, and good regeneration performance is a tremendous challenge. In this work, potassium iron antimony thiostannate (PIATS) synthesized by the hydrothermal method was utilized for green recovery cesium from geothermal water for the first time. PIATS showed a high adsorption capacity of 401.23 mg/g, which was much higher than other types of adsorbents at present. Meanwhile, PIATS showed rapid ion exchange kinetics (within 3 min) and broad pH resistance (4–12). More importantly, PIATS still showed excellent selectivity to cesium even in geothermal water containing many other coexisted ions ( K d = 1.96 × 10 4 mL/g), and the separation factors between Cs + and the coexisted competing ions were ranged from 462.77 to 963.76. Subsequently, the cesium-laden PIATS could be easily eluted with 0.50 mol/L NaNO 3 to achieve rapid desorption (within 10 min). The concentration of Cs + in the elution was enriched more than 11 times higher than that in the original solution. Furthermore, no organic solvents or other toxic reagents were involved during the whole process. Therefore, the adsorption advantages, excellent enrichment ability, and structural stability of PIATS make it a potential recyclable candidate for green cesium recovery from geothermal water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Chemistry
·
2022
·
IF 3.241
Yingchun Xie,Yilin Zhang,Jiayu Qin,Murodjon Samadiy,Tianlong Deng
In this study, ethylene glycol diglycidyl ether (EGDE) and melamine (ME) were used to prepare a spherical composite material CMC-LTO-EGDE-ME through the strategy of cross-linking reaction of biodegradable sodium carboxymethyl cellulose (CMC) with Li2TiO3 (LTO) to improve the cycle stability of the adsorption-desorption for lithium recovery. In the geothermal water at 333.15°K, the adsorption capacity of the spherical composite adsorbent for lithium-ion is 12.02 mg/g, and the adsorption equilibrium time is 8 h. There is a good selectivity of Li+ (Kd = 3.7 × 103) and high separation factors between Li+ and Na+, K+, Cs+ and Ca2+ (between 39.17 and 181.97). Studies on adsorption kinetics and adsorption isotherm showed that composite material’s adsorption process was obtained from the pseudosecond-order kinetics and the molecular diffusion model. It was found that the composite material has broad applications in lithium recovery from geothermal water.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Bingxue Huang,Jie Liu,Jia Xie,Rui Tang,Hongyi Zhu,Biyou Peng,Wei Zhang
Photothermal 3D hydrogels have shown great potential for solar-driven desalination. In this study, an integrated 3D photothermal hydrogel evaporator was developed to enhance evaporation performance by leveraging a solar-induced environmental heat field and a concave evaporation surface. The photothermal hydrogel matrix was fabricated by incorporating sodium humate-based photothermal particles (synthesized through the chelation of sodium humate and Cu 2+ ) into a sodium alginate/polyacrylamide hydrogel network. The resulting 3D hydrogel evaporator, featuring a tree-ring structure, achieved a stable evaporation rate of 2.23 kg m −2 h −1 in deionized water for 3 h under one-sun irradiation and demonstrated robust performance in various water bodies, including strong brine and sewage. To further enhance energy input, a commercial photothermal enclosure was integrated to create a surrounding heat field under sunlight. By combining energy from the photothermal particles and the solar-induced heat field, the evaporator with a concave evaporation surface achieved an exceptional evaporation rate of 3.69 kg m −2 h −1 under one-sun irradiation, corresponding to a theoretical solar energy utilization efficiency of 193 %, representing a 65 % improvement compared to pre-integration levels. This work presents a novel strategy for designing high-efficiency solar evaporators, offering significant advancements in sustainable desalination technologies.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）