CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yang Wang,Guorong Yi,Wanqiang Zhang,Jiawei Hou,Kuok Ho Daniel Tang,Bowen Wang,Hua Li,Quan Wang,Hamada Abdelrahman,Tao Zhang,Sabry M. Shaheen,Ronghua Li
In this study, the effects and mechanisms of water-soluble ferrous salts (WSFS) on the humification and carbon conversion during the co-composting of hoggery slurry (HG) and wheat husks (WH) were investigated. A composting mixture of HG and WH was treated with FeCl 2 addition (T1) and FeSO 4 addition (T2), and compared with an untreated control (CK), as a function of time (28 days). The duration of the high-temperature phase (>50 °C) for CK, T1, and T2 are 17, 15, and 15 days, respectively. Compared to the CK, T1 and T2 treatments reduced CO 2 emissions by 11.4 % and 32.0 %, respectively. The calculated total global warming potential values were 293.67 (CK), 267.69 (T1) and 207.10 (T2) g CO 2 eq kg −1 . The humus concentrations increased in all treatments: CK by 28.10 %, T1 by 53.41 % and T2 by 49.73 % in composting. WSFS addition enhanced biotic humification by elevated the abundance and distribution of Bacillus , which promotes cellulose and hemicellulose decomposition, and Tepidimicrobium , which accelerates the production of humus, through use of sugars and proteins. Besides, WSFS addition decreased the levels of pathogenic bacteria in the final compost product. Notably, WSFS addition also benefited the abiotic humification by production of •OH during oxidation of Fe(II) in composting. This study enhances the understanding of the biotic and abiotic functions of FeSO 4 and FeCl 2 in promoting humification and reducing carbon emissions during composting. The detailed role of hydroxyl radical in composting and the effectiveness of WSFS-addition in composting nitrogen transformation are still need to be addressed in future.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2024
·
IF 4.9
Guihong Han,Aohua Li,Yizhuang Wang,Hu Sun,Yanfang Huang,Bingbing Liu
The mining of strategic U-Mo deposits invariably leads to the generation of wastewater with significant risks of radioactive and heavy metal pollution. This study explores a novel process for the simultaneous precipitation-adsorption of U and Mo from mine drainage, with subsequent solidification of the radioactive Fe(OH) 3 sediments using tailings. The results demonstrate that, under specific conditions, such as 33.6 mg/L Fe 3+ and pH 6.0–7.0, more than 97 % of U and Mo can be efficiently co-removed, and the treated water exhibits a gross α radioactivity of less than 0.2 Bq/L. The U-bearing Fe(OH) 3 sediments are transformed into general solid wastes, exhibiting low α radioactivity of less than 1.0 Bq/kg for 238 U, 232 Th or 226 Ra, after being blended with tailings in a mass ratio of 1:50. The reaction, adsorption and solidification mechanisms are further elucidated. The U and Mo are primarily precipitated and adsorbed in the forms of UO 2 (OH) 2 and Fe 2 (MoO 4 ) 3 respectively. The U-bearing Fe(OH) 3 particles are firmly encapsulated by negatively charged particles of phlogopite, quartz, and orthoclase, and agglomerate into large particles within the solidification product, thereby reducing U dissolution in simulated acid rain. Ultimately, a sustainable treatment flowsheet is established for the management of U-Mo ore mine drainage and tailings.
研究领域:
环境科学
·
放射化学
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产品关联
DOI
高影响因子
MACROMOLECULES
·
2025
·
IF 5.2
Yuming Deng,Jiahui Zhou,Mengjie Si,Gaopeng Wang,Yueman Tang,Zi Rong Zhang,Jiayu Hu,Yan-jie Wang,Jintao Yang,Si Yu Zheng
Polyzwitterionic gels possess a high density of ionic groups and present great potential in ionotronics. However, zwitterionic chains are easy to be highly hydrated, leading to weak interchain interactions and a poor mechanical performance. Although metal ions like Fe3+ show great effectiveness in toughening hydrogels, they usually weaken the zwitterionic gel inversely due to the anti-polyelectrolyte effect. Herein, a special co-ion effect of Fe(ClO4)3 is found, which is adopted to toughen the zwitterionic hydrogel. In contrast to the weak effect of Fe(NO3)3, FeBr3, and FeCl3 salts on gel toughness, Fe(ClO4)3 can toughen the imidazolium-based polyzwitterion (pVBIPS) effectively. The Fe(ClO4)3-treated pVBIPS gel exhibits a high ultimate tensile stress of 1.34 MPa, a Young’s modulus of 1.2 MPa, and tensile work of 2.29 MJ/m3, surpassing many existing pure zwitterionic hydrogels. It is found that the ClO4– ions can effectively bind to the imidazolium moiety of pVBIPS and promote the formation of SO3––Fe3+ interactions; the trivalent Fe3+ ions can then bridge multiple sulfonate groups to impart the strength. This work should offer a new strategy for developing tough zwitterionic hydrogels.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Yun-Jie Wang,Chen-Xuan Li,Yan Meng,Zhi-Yan Guo,Shuo Cui,Xian-Zhong Fu,Hou-Qi Liu,Wen-Qi Xia,Wen-Wei Li
Low-pressure catalytic membranes allow efficient rejection of particulates and simultaneously removing organics pollutant in water, but the accumulation of dissolved organic matters (DOM) on membrane surface, which cover the catalytic sites and cause membrane fouling, challenges their stable operation in practical wastewater treatment. Here we propose a ferric salt-based coagulation/co-catalytic membrane integrated system that can effectively mitigate the detrimental effects of DOM. Ferric salt (Fe 3+ ) was in the wastewater, serving both as DOM coagulant to lower the membrane fouling and as a co-catalyst with the membrane-embedded MoS 2 nanosheets for perxymonosulfate (PMS) activation and pollutant degradation. The membrane functionalized with 2H-phased MoS 2 nanosheets showed improved hydrophilicity and fouling resistance relative to the blank polysulfone membrane. Attributed to the DOM coagulation and co-catalytic generation of surface-bound radicals for decontamination at membrane surface, the catalytic membrane/PMS/ Fe 3+ system showed much less membrane fouling and 2.6 times higher pollutant degradation rate in wastewater treatment than the catalytic membrane alone. Our work imply a great potential of coagulation/co-catalytic membrane integrated system for water purification application.
研究领域:
环境科学
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材料科学
·
水处理工程
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Chaocheng Zeng,Huimin Hu,Chao Wang,Qing Shi,Qiwu Zhang,Mengfei Chen,Qian Wang,Tingting Zhang
Due to the stable chelating effect of organic phosphonates in wastewater, phosphonates with increasing emission are difficult to be removed effectively by traditional ferric salt flocculation , which has posed tough challenges for reducing total phosphorus pollution in recent years. In this work, calcium carbonate (CaCO 3 ) was introduced to work together with the widely investigated flocculant of ferric chloride (FeCl 3 ) to realize an efficient removal of nitrilotrismethylenephosphonic acid (NTMP) at much lower dosage of FeCl 3 . With an aid of synergy effect from together use of CaCO 3 and FeCl 3 , the remaining concentration as low as 0.16 mg−P/L, far below the sewage discharge limit (0.5 mg−P/L), was simply obtained with a significantly reduced Fe/P molar ratio at only 4, resulting from calcium source donor to form more stable Fe–Ca–P tridentate bridging complexes, high affinity towards ferric ions on CaCO 3 surface and slow-release alkaline from CaCO 3 . A comparison among sodium hydroxide (NaOH), calcium hydroxide (Ca(OH) 2 ) and CaCO 3 as additives, was carried out to highlight the advantages of using CaCO 3 and clarify the mechanism for the greatly improved performance by a set of characterizations including XRD, FTIR, Zeta potential , XPS , SEM−EDS and TG analyses. The addition of CaCO 3 in ferric flocculation resulted in further obvious advantages such as 75% shortened settling time and only one−third of sludge volume of the precipitant, beneficial to the sample handling in engineering application. The proposed new approach has been further confirmed to work efficiently on real phosphonate-containing wastewater. Discussion on the interaction between CaCO 3 and ferric salts in phosphonate solutions shed new insights into the working mechanism of using CaCO 3 for the treatment of phosphonates-containing wastewater.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 5
·3003-3011
·
IF 3.361
Jian Wang,Cheng Zhang,Xiao-Qing Ye,Wenting Du,Shenxin Zeng,Jian-Hong Xu,Hong Yin
An efficient and practical benzylic aerobic oxidation catalyzed by cheap and simple N-hydroxyimide organocatalyst has been achieved with high yields and broad substrate scope. The organocatalyst used can be recycled and reused by simple workup and only minute amount (1 mol% in most cases) of simple iron salt is used as promoter. Phenyl substrates with mild and strong electron-withdrawing group could also be oxygenated in high yields as well as other benzylic methylenes. Influence of substituents, gram-scale application, catalysts decay and general mechanism of this methodology has also been discussed.
研究领域:
有机化学
·
催化化学
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DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Niuniu Ma,Peisheng Li,Shuguang Yang,Mingyue Jiang,Xiaochun Zhang
Wood is recognized as a promising raw material for house furnishings due to its good mechanical properties, relatively low density and weight and biodegradability. However, the natural color difference of wood veneer always induces value degradation. Therefore, accurate color regulation plays a pivotal role in producing high-value wood-based composites. In this study, a Quercus robur wood exhibiting a pronounced color variation was treated by an alkaline hydrogen peroxide (H 2 O 2 ) homogenization process to regulate the content of phenolic extractives, and ferric chloride (FeCl 3 )-induced color modification to optimize the color. In order to minimize the chromatic disparity of the veneer, it simultaneously restores its initial hue and thus enhances its value. The color difference values of natural untreated Quercus robur veneer and homogenized toned veneer were assessed by using color testing based on the CIEL*a*b* 1976 system. The results demonstrated that the levels of lignin, hemicelluloses , and extractives in the toned veneers subjected to homogenization pretreatment exhibited varying degrees of reduction, along with a decrease in their affinity for iron ions . By assessing the colorfastness of homogenized, toned veneer through testing, the water and light resistance of the homogenized pretreated veneer is significantly superior to that of Quercus robur treated exclusively with iron salts. A higher level of color uniformity in the homogenized pretreated toned veneers, with the toned veneers treated with 0.16 mol/L iron salt exhibiting the closest resemblance to natural Quercus robur wood. This study not only reveals a novel methodology for chemically modifying the hue of wooden surfaces to achieve natural color uniformity but also presents a sustainable and facile approach to promote the high value-added utilization of wood.
研究领域:
林产化学
·
木材科学
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产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Xianyuan Liu,Xianghua Wang,Xianyong Lu,Lei Jiang
2D inorganic nanomaterials have attracted considerable research interest owing to their exceptional physical and chemical properties. Nonetheless, achieving precise control over the morphology of 2D nanomaterials presents a significant challenge, primarily due to their elevated surface energy and the stringent requirements for growth control. In this study, a designed reduction technique is employed to finely tune the morphology of 2D nanosheets, with iron salts serving as morphology-directing agents. Al-doped α -Fe 2 O 3 nanosheets are synthesized through a solvothermal process and subsequently reduced to Al-doped Fe 3 O 4 nanosheets, characterized by distinctive sawtooth-like edges. The incorporation of iron salts facilitates atomic rearrangement within the iron oxide lattice, wherein rapid atomic migration induces defects along the crystal facets, resulting in unique morphologies. Furthermore, the doping of aluminum elements and the resultant Fe 3 O 4 significantly enhance the electromagnetic properties of the nanosheets, yielding exceptional electromagnetic wave absorption performance. Notably, a remarkable minimum reflection loss (RL min ) of −66.1 dB is achieved at a thickness of 4.0 mm, with an effective absorption bandwidth (RL ≤ −10 dB) extending up to 3.9 GHz. This controlled reduction strategy presents a promising pathway for tailoring the morphology of 2D nanomaterials and optimizing their performance in electromagnetic wave absorption applications.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 48
·18942-18951
·
IF 8.262
Feng Qian,Xiangdong Zhu,Yuchen Liu,Shilai Hao,Zhiyong Jason Ren,Bin Gao,Ruilong Zong,Shicheng Zhang,Jianmin Chen
Magnetic carbon composites (MCs) have received great interest in areas such as environmental remediation, catalyst supports and carriers for drug delivery systems. In order to improve the porosity of the MCs, the catalytic mechanism of iron salts during CO2 activation of hydrochar was systematically investigated using a suite of methods including Mössbauer spectroscopy, on-line pyrolysis gases and porosity analysis. Fe3O4 and superparamagnetic α-Fe2O3(s), pyrolysis products of iron salts, were found to promote the reaction between carbon and CO2 gas, leading to a decrease in the activation temperature that is required for optimal porosity. However, the reduction reaction between iron oxide and carbon was completely inhibited by CO2 gas. FeCl3 enhanced the thermal cracking of hydrochar and increased the porosity of the MCs in terms of an improvement of the amount of H2, namely the pore-creating effect. However, other iron salts showed adverse effects, due to their inhibition effects on the thermal cracking of hydrochar. The MCs with excellent porosities showed high adsorption capacities for pharmaceuticals and personal care products (PPCPs), and were negatively correlated with the melting points of the PPCPs. The findings from this work can guide the production of novel MCs for maximum removal performance of organic pollutants from the environment.
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
Membranes
·
2025
·Vol. 15
·期 10
·297
·
IF 3.6
Qiaoying Wang,Bingbing Zhang,Jicheng Sun,Wenjia Zheng,Jie Zhang,Zhichao Wu
Although adding iron salts can improve phosphorus removal in membrane bioreactor (MBR) processes, overdosing iron salts may result in excessive iron concentrations in the effluent and pose risks of surface water contamination. In this study, an optimized iron salt dosing method was proposed to comprehensively investigate its effects on the performance of MBRs and the control of iron leakage. The results showed that batch dosing of solid iron salts (Fe2(SO4)3) into the influent or activated sludge maintained an effluent Fe3+concentration below 1.0 mg/L and a total phosphorus (TP) concentration below 0.30 mg/L. Long-term operation of the MBR (under conditions of HRT = 4.3 h, SRT = 20 d, and MLSS = 12 g/L) showed that batch dosing of solid iron salts led to an increase in the effluent ammonia–nitrogen (NH3-N) concentration, and the nitrification effect was restored after supplementing the alkalinity. Iron salts increased the TP removal rate by approximately 40% while inhibiting the biological phosphorus removal capacity. The average Fe3+concentration in the membrane effluent (0.23 ± 0.11 mg/L) met China’s Environmental Quality Standard for Surface Water (GB3838-2002). This study demonstrates that batch dosing of solid iron salts effectively controls iron concentration in the MBR effluent while preventing secondary pollution. The mechanisms of the impact of iron salts on MBR performance provide crucial theoretical and technical support for MBR process optimization.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Jialin Liang,Jinjia Huang,Siwei Zhang,Xian Yang,Shaosong Huang,Li Zheng,Maoyou Ye,Shuiyu Sun
High levels of extracellular polymeric substances (EPS) and bound water in sludge negatively impact sludge dewaterability. This study applied a novel sludge conditioning process involving calcium hypochlorite (Ca(ClO) 2 ) oxidation, ferric coagulant re-flocculation, and walnut shell (WS) skeleton construction to remove EPS and bound water and improve sludge dewaterability. The study also described the underlying mechanisms for this activity, by investigating the changes in EPS distribution, morphological structure, flocs morphology, rheological behavior, and bound water. Using single factor experiments, the optimal dosages of the composite conditioner included 10 mg/g dry solid (DS) of Ca(ClO) 2 , 60 mg/g DS of ferric chloride (FeCl 3 ) or 100 mg/g DS of polymeric ferric sulfate (PFS), and 600 mg/g DS of WS. Using a novel pressure filtration system, the moisture content of the dewatered sludge cake conditioned with Ca(ClO) 2 /ferric coagulant/WS was reduced to below 50 wt%. The study described a three-step mechanism for the composite conditioning of sludge. First, protein-like substances and polysaccharide-like materials in the EPS and bound water were degraded by Ca(ClO) 2 oxidation. Second, the porous structure and compact flocs were re-flocculated using high charge neutralization and the bridging ability of ferric coagulant. The flowability increased and the viscosity decreased compared with raw sludge. Third, a rigid networked structure was formed by adding the WS skeleton. The combined Ca(ClO) 2 /ferric coagulant/WS treatment had a significant synergistic effect supporting dewatering. The filter liquor of the combined treatment has a lower impact on the environment. The combined treatment is an appropriate was to treat sludge prior to landfilling and incineration. Furthermore, the economic analysis showed that using the Ca(ClO) 2 /FeCl 3 /WS treatment had economic advantages over other treatments.
研究领域:
环境工程
·
废水处理
·
污泥管理
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 31
·期 5
·6929-6943
·
IF 5.8
Li Jinlin,Sun Chunbao,Wang Peilong,Kou Jue
For over two hundred years, cyanide has served as the primary reagent for gold extraction. However, due to its high toxicity, the use of cyanide poses significant risks. Traditional low-toxicity leaching reagents have limitations that restrict their widespread industrial application, leading to the necessity for the development of new, efficient, and low-toxic gold leaching reagents to support sustainable gold production. In this study, a novel, efficient, and low-toxicity gold extraction reagent was synthesized at high temperatures by combining urea, sodium carbonate, and a specific iron salt. The research delved into the leaching ability of the reagent under different synthesis conditions and examined the generation of free cyanide content as a by-product. Findings indicated that reagents synthesized with either potassium ferrocyanide or potassium ferricyanide displayed comparable leaching capabilities. Reagents synthesized at 800 °C exhibited lower levels of free cyanide ions and reduced toxicity. Additionally, this reagent demonstrated exceptional selectivity for gold, while in minimal dissolution of copper, iron, nickel, lead, and iron from computer central processing unit (CPU) pins. Under optimal conditions, the efficiency of gold extraction from CPU pins reached 94.65%. Hence, this reagent holds significant potential for the low-toxicity extraction of gold from electronic waste or auriferous concentrates.
研究领域:
冶金学
·
环境科学
·
材料科学
·
化学工程
·
废弃物回收
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）