COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jing Wei,Zhigang Zheng,Lin Zhao,Zhaoguo Qiu,Dechang Zeng
Fe-based metallic glasses (Fe MGs ) are popular reductants for the restoration of wastewater containing various pollutants, but it still suffers from surface passivation and a narrow applicable pH range. In this work, pyrite, an abundant iron sulfide , was used to enhance the reactivity of Fe MGs for the removal of azo dye . Synergetic effects between pyrite and Fe MGs improved the removal of Orange II when using an Fe MGs /pyrite mixture, where the reaction rate constant k obs was 0.218 min −1 , which was higher than when using Fe MGs alone (0.114 min −1 ). Orange II was removed at pH 0 ranging from 5.0 to 10.0 in the presence of pyrite, while it was inefficiently removed by Fe MGs alone (10 g/L) at pH 0 10.0. Mechanistic investigations showed that the synergistic effect between Fe MGs and pyrite enhanced the surface corrosion of Fe MGs and accelerated the Fe 3+ /Fe 2+ redox cycle to generate more sorbed Fe 2+ , which was the dominant reactive species during Orange II removal. This study proposes an approach for enhancing the removal of dye wastewater by using Fe MGs to treat mine waste.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Jianan Niu,Xin Kong,Qingxia Li,Yongmei Zhang,Jin Yuan,Jianguo Liu,Yifeng Zhang
Dosing zero valent iron (ZVI) or sodium hydroxide (NaOH) is the common method of addressing acidification in anaerobic digestion (AD) systems; however, few studies have discussed and compared their effects on microbial metabolism. In the present study, microbial syntrophy and metabolic pathways under ZVI and NaOH regulation are comparatively analyzed through microbial network analysis and metagenomic/metaproteomic analyses. CH 4 yield in the ZVI reactor was 414 mL/gVS, an increase of 23% when compared with that in the reactor with NaOH dosing (336 mL/gVS). The methanogenesis recovery period in the ZVI reactor (37 days) was shorter than that in the NaOH reactor (48 days). Co-occurrence networks indicated that ZVI promoted Methanoculleus and Methanosarcina to establish a complex syntrophic association with SAO bacteria ( Syntrophaceticus and Aminobacterium ) and syntrophic acetogens ( Syntrophomonas ), strengthening SAO-hydrogenotrophic methanogenesis (HM) and acetoclastic methanogenesis (AM) pathways simultaneously. Metagenomic analysis showed that the relative abundance of mcrA and fwdB in the ZVI reactor was higher 27% than that in the NaOH reactor. Furthermore, through metaproteomics analysis, much more enzymes related to glucose degradation, bioconversion of butyric acid and pyruvate, conversion of formate and acetate to CO 2 , and production of CH 4 from acetate and CO 2 were significantly upregulated under ZVI regulation than under NaOH regulation (fold change relative to control [FC] > 1.5, p < 0.05). The results of the present study enhance our understanding of methanogenic mechanisms under the regulation of ZVI, providing a theoretical basis for its practical application in AD systems experiencing VFA suppression.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Peng Xu,Lei Wang,Xin Liu,Shiqi Xie,Baolin Hou
The conventional zero-valent iron/peracetic acid (ZVI/PAA) system is severely limited owing to the passivation of ZVI and the low recovery of Fe 2+ . In this study, a reducing agent, vitamin C (H 2 A), was used for the first time to enhance the ZVI/PAA system as a way to improve its degradation performance. Under optimal conditions, the removal efficiency of the H 2 A/ZVI/PAA system was 82.9%, while that of the H 2 A/PAA and ZVI/PAA systems were only 19.0% and 25.6%. Free radical quenching and electron paramagnetic experiments (EPR) confirmed that CH 3 C(O)O•, •OH and CH 3 C(O)OO• were the major active species for acid orange 7 (AO7) degradation with contributions of 9.7%, 75% and 14.4%, respectively. The degradation mechanism was proposed through UV–vis full-wavelength scanning and chemical oxygen demand (COD) experiments. The removal of AO7 was not affected in the presence of Cl − , S O 4 2 − and H C O 3 − , while inhibition occurred with humic acid . ZVI exhibited excellent catalytic properties and stability, and the removal efficiency of AO7 exceeded 70% after three cycles. Additionally, the H 2 A/ZVI/PAA system showed good ability to remove AO7 in well water, lake water, river water and reservoir water, and the elimination efficiency of MO, DCF and ACE also exceeded 70%. Overall, this study contributes new cognition for enhancing the ZVI/PAA system to degrade contaminants, which is expected to achieve a cleaner water environment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yifei Feng,Nan Xu,Lei Peng,Jiayu Shen,Xiangrong Yang
Remediating hexavalent chromium (Cr(VI))-contaminated soils using green synthesized nano-iron (g-nZVI), which merits high reactivity, low cost, and environmental friendliness, has attracted significant attention. However, the broad existence of nano plastics (NPs) could adsorb Cr(VI) and subsequently influence in situ remediation of Cr(VI)-contaminated soil by g-nZVI. To clarify this issue and improve the remediation efficiency, we investigated the co-transport between Cr(VI) and g-nZVI coexisting with sulfonyl-amino-modified nano plastics (SANPs) in water-saturated sand media in the presence of oxyanions (i.e., phosphate and sulfate) at environmentally relevant conditions. This study found that SANPs inhibited the Cr(VI) reduction to Cr(III) (i.e., Cr 2 O 3 ) by g-nZVI, attributed to nZVI-SANPs hetero-aggregates and Cr(VI) adsorption on SANPs. Notably, “nZVI-[SANPs•••Cr(III)]” agglomerate happened via complexation of [–NH 3 •••Cr(III)] between Cr(III) from Cr(VI) reduced by g-nZVI and amino group on SANPs. Further, the co-presence of phosphate (stronger adsorption on SANPs than g-nZVI) remarkably suppressed Cr(VI) reduction. Then, it promoted the co-transport of Cr(VI) with nZVI-SANPs hetero-aggregates, which could potentially threaten underground water. Fundamentally, sulfate would instead concentrate on SANPs, hardly impacting the reactions between Cr(VI) and g-nZVI. Overall, our findings provide crucial insights into understanding the Cr(VI) species transformation during co-transport with g-nZVI in ubiquitous complexed soil environments (i.e., containing oxyanions) contaminated by SANPs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Joule
·
2023
·
IF 39.8
Tiancheng He,Haiyan Wang,Bing Lu,Tianlei Guang,Ce Yang,Yaxin Huang,Huhu Cheng,Liangti Qu
Ubiquitous moisture is of particular attraction for sustainable power generation. However, rigorous assembly procedures limit the efficient large-scale integration for moisture-enabled electric generators (MEGs). Herein, we develop fully printed planar MEG (PMEG) arrays using modulated polycation and polyanion inks, which maximize access to moisture and make it free of strict assembly and device packaging. Thus, a PMEG unit (only 0.3 cm 2 ) generates an open-circuit voltage of up to 1.1 V, along with a power density of 2.6 μW cm −2 . A small piece of sheet with 200 PMEG units offers a maximum voltage of 200 V and a current of 1.3 mA. A standard power module is constructed to meet the on-demand power supply requirements of compact electronics. Furthermore, scalable and customizable PMEG arrays can be compatibly integrated with flexible circuits, as demonstrated by a fully printed self-powered functional system including PMEG arrays and energy-storage and electrochromic devices.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ying Chu,Peng Wang,Yihong Ding,Jie Lin,Xinxin Zhu,Shiqiang Zhao,Huile Jin,Tianbiao Zeng
Antimony (Sb) has been considered a promising anode for sodium-ion batteries (SIBs) owing to its high theoretical capacity (660 mA h g–1) and low redox voltage (0.2–0.9 V vs Na+/Na). However, the capacity degradation caused by the volumetric variation during battery discharge/charge hinders the practical application. Herein, guided by the DFT calculation, Sb/Fe2S3 was fabricated by annealing Fe and Sb2S3 mixed powder. Next, Sb/Fe2S3 was blended with 15 wt % graphite by ball milling, yielding nano-Sb/Fe2S3 anchored on an exfoliated graphite composite (denoted as Sb/Fe2S3-15%). When applied as an anode of SIBs, Sb/Fe2S3-15% delivered reversible capacities of 565, 542, 467, 366, 285, and 236 mA h g–1 at current rates of 1, 2, 4, 6, 8, and 10 A g–1, respectively, surpassing most of the Sb-based anodes. The co-existence of highly conductive Fe2S3 and Sb minimizes the polarization of the anode. Our experiments proved that the Sb and Fe2S3 phases were reversible during discharge/charge cycling, and the exfoliated graphite can accelerate the Na+ diffusion and e– conduction. The proposed synthesis method of this work can also be applicable to synthesize various antimony/transition metal sulfide heterostructures (Sb/M1–xS), which may be applied in a series of fields.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xuran Liu,Xianli Yang,Jingnan Yang,Yanxin Wu,Dongbo Wang
The quality and quantity of short chain fatty acids (SCFAs) production from anaerobic fermentation of sewage sludge is generally constrained by low organics solubilization and poor substrate-availability. This study provided an environmentally friendly strategy with zero valent iron (ZVI) activating sulfite pretreatment to overcome this limitation and advance the sludge anaerobic fermentation. Experimental results showed that the maximal SCFAs production and acetate proportion promoted by 5.7 and 2.75 times respectively at 500 mg S/L and the ZVI/sulfite ratio of 1.25. Mechanism analysis elucidated that the free radicals of S O 4 - · and ·OH produced from ZVI-sulfite pretreatment accelerated the disintegration of sludge-flocs and decreased the value of α-helix and ratio of α-helix/ (β-sheet + random coil) from 21.64 % and 44.23 % to 17.80 % and 38.67 %, respectively, which provided more easily- and bio- available substance for functional anaerobes. The ZVI-sulfite pretreatment enhanced the ability of functional anaerobes for SCFAs production processes as hydrolysis, acidogenesis and acetogenesis and reduced the SCFAs consumption as methanogenesis, which ultimately promoted SCFAs accumulation. Microbial community illustrated that ZVI-sulfite pretreatment enriched the relative abundance of functional anaerobes related to hydrolysis, acidogenesis and acetogenesis bioprocesses. PICRUSt analysis demonstrated that the pretreatment boosted the functional genes abundance involved in pathway of butyrate and acetate formation. Moreover, the enrichment genes of acetate formation were consistent with the increase of acetate proportion.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yang Wu,Jing-ying Zhu,Jia-wen Bai,Li-feng Lin,Chang-ping Yu
Pre-magnetization can boost the activity of zero-valent iron (ZVI), facilitating the removal of contaminants by pre-magnetized ZVI (Pre-ZVI) activated peroxides. However, Pre-ZVI’s persistence and stability in the activation of peroxides are little known. In this work, we investigated the ability of dry and wet Pre-ZVI activated peroxymonosulfate (Pre-ZVI/PMS) to enhance the removal of ofloxacin (OFX), the influence of environmental parameters as well as the evaluation of the long-term performance of Pre-ZVI/PMS. The results showed that the dry Pre-ZVI/PMS system had better removal performance in the wide pH range (4–9), with OFX removal efficiencies of over 90 % and high PMS utilization within 120 min. The presence of different environmental factors significantly affected the degradation process. Remarkably, the ability of dry and wet Pre-ZVI to activate PMS decreased over time, with all systems experiencing a decrease of reaction rate constant ( k ) of approximately 20–47 % from day 1 to day 30. The catalytic efficacy could be considerably recovered by re-magnetization, but it dropped again with time. The vulnerable sites and degradation mechanism of OFX were determined by liquid chromatography–tandem mass spectrometry analysis and density functional theory calculation, and the toxicities of the transformation products in the system were predicted. This work is a guide for clarifying the long-term viability of the Pre-ZVI-activated peroxides used in environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2023
·
IF 5.8
Guangchao Xie,Lishi Wang,Bingjie Li,Cai Zhang,Xuejun Zhang
Magnetic hyperthermia therapy of tumors employing magnetic materials has been greatly developed due to their low invasiveness, high specificity, few side effects and no limitation of tissue penetration depth. However, traditional nanoscale magnetocaloric materials exhibited the disadvantages of low tumor enrichment efficiency, complex preparation process and difficulty in large-scale production. While eddy current loss-based magnetic hyperthermia tumor ablation with metal implants faces shortcomings such as high invasiveness and low selectivity of tumor shape and volume. Herein, we developed injectable magnetic gels by adding commercial magnetic metal or metal oxide powders (CMMPs) into alginate-Ca 2+ (ALG-Ca 2+ ) gel through an ultra-simple mixing strategy for magneto-thermal therapy of tumors in vivo. The ALG-Ca 2+ gel can not only turn the water-insoluble CMMPs into injectable gel, but also retain the inherent magnetic loss-based heating capacity. Besides, CMMPs in the gels are easily retained at the tumor site after peritumoral injection because of their large size and strong hydrophobicity , which benefits the efficiency and accuracy of the treatment and reduces side effects to the surrounding tissues. The prepared ALG-Ca 2+ -CMMPs give full play to the inherent magneto-thermal capacity of CMMPs, which possesses super high loading ability (>100 mg magnetic materials/mL), superior large-scale production capability (>1 kg in laboratory synthesis), low cost, satisfactory syringeability and biological safety. Collectively, this study provides a convenient and universal strategy for the construction of magnetocaloric materials for biological applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Jiaman Sun,Juan Luo,Rui Ma,Junhao Lin,Lin Fang
In order to reduce the risks of sulfur-containing contaminants present in biofuels, the effects of microwave and content of hydrogen donor on the cracking of C–S bonds and the migration of sulfur were studied by co–pyrolysis of biomass and plastic. The synergistic mechanism of microwave and hydrogen donor was explored from the perspective of deducing the evolution of sulfur–containing compounds based on microwave thermogravimetric analysis . By combining temperature–weight curves, it was found that microwaves and hydrogen radicals promoted the cracking of sulfur–containing compounds and increased the mass loss of biomass during pyrolysis . The mixing ratio of hydrogen donor (plastic) was the key parameter resulting in the removal of sulfur from oil. By adjusting the mixing ratio, the yield of co–pyrolyzed oil was three times higher than that of cow dung pyrolysis alone and the relative removal rate of sulfur reached 73.67%. The relative content of sulfur in the oil was reduced by 73.77% due to the escape of sulfur–containing gases (H 2 S, COS and C 2 H 5 SH) and the formation of sulfate crystals in the char. Microwave selectively heated sulfur–containing organics and hydrogen radicals stimulated the breaking of C–S bonds, which improved the cracking efficiency of the oil. This breaking will provide a theoretical and technological reference for the environmentally friendly treatment of biomass and biofuels.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Yulin Xu,Wenjing Xiong,Jiaqi Huang,Xinglin Tang,Hongqiang Wang,Wei Liu,Dan Xiao,Yong Guo,Yongzhi Zhang
Fluoride ferrous (FeF 2 ) is viewed as a promising conversion cathode material for next-generation lithium-ion batteries (LIBs) due to its high theoretical specific capacity and low cost. Unfortunately, issues such as poor intrinsic conductivity, iron dissolution, and phase separation hinder the application of FeF 2 in high-energy cathodes. Here, a pressure-induced morphology control method is designed to prepare coralloid-like FeF 2 nanocrystals with nitrogen-rich carbon coating (c-FeF 2 @NC). The coralloid-like interconnected crystal structure of c-FeF 2 @NC contributes to reducing interfacial resistance and enhancing the topotactic transformation during the conversion reaction, and the nitrogen-rich carbon (NC) coating can enhance interfacial stability and kinetic performance. When used as a conversion cathode for LIBs , c-FeF 2 @NC exhibits a high initial reversible capacity of 503.57 mA h g −1 and excellent cycling stability of 497.61 mA h g −1 with a low capacity decay of 1.19 % over 50 cycles at 0.1 A/g. Even at 1 A/g, a stable capacity of 263.78 mA h g −1 can still be retained after 200 cycles. The capability of c-FeF 2 @NC as a conversion cathode for sodium-ion batteries (SIBs) was also evaluated to expand its field of application. Furthermore, two kinds of full batteries have been assembled by employing c-FeF 2 @NC as cathodes and quantitative limited-Li (LLi) and pre-lithiated reduced graphene oxide (PGO) as anodes, respectively, to envisage the feasibility of practical applications of conversion materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Shuxuan Wu,Sheng Deng,Fu Xia,Xu Han,Tianyu Ju,Han Xiao,Xiangjian Xu,Yu Yang,Yonghai Jiang,Beidou Xi
The increasing risk of organic contamination of groundwater poses a serious threat to the environment and human health, causing an urgent need to develop long-lasting and adaptable remediation materials. Controlled-release materials (CRMs) are capable of encapsulating oxidants to achieve long-lasting release properties in aquifers and considered to be effective strategies in groundwater remediation . In this study, novel hydrogels (ASGs) with thermosensitive properties were prepared based on agarose and silica to achieve controlled persulfate (PS) release. By adjusting the composition ratio, the gelation time and internal pore structure of the hydrogels were regulated for groundwater application, which in turn affected the PS encapsulated amount and release properties. The hydrogels exhibited significant temperature responsiveness, with 6.8 times faster gelation rates and 2.8 times longer controlled release ability at 10 ℃ than at 30 ℃. The ASGs were further combined with zero-valent iron to achieve long-lasting degradation of the typical nitrobenzene compound 2,4-dinitrotoluene (2,4-DNT), and the degradation performance was maintained at 50 % within 14 PV, which was significantly improved compared with that of the PS/ZVI system. This study provided new concepts for the design of controlled-release materials and theoretical support for the remediation of organic contamination.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）