Extension Of Reaction Time Research Articles

Electroformation and characterization of soybean protein isolate hydrolysates-modified liposomes

This research aimed to elucidate the application and feasibility of the enhancement of liposome oxidative stability by the interaction of liposomes with soybean protein isolate hydrolysates (SPIHs) during liposome electroformation. It was observed that the degree of hydrolysis, percentage of low-molecular-weight distribution, and solubility of SPIHs after enzymatic hydrolysis increased with the extension of reaction time. The average fluorescence intensity (average gray level) was approximately 200 a.u. for each liposome, indicating a homogeneous distribution of SPIHs on the liposome surface. Moreover, it was found that the advanced structure of SPIHs incorporated with liposomes was altered appreciably. Both hydrophobic forces and hydrogen bonds exhibited an important role in the interaction between SPIHs and liposomes. In addition, morphology observation indicated that the liposomes were spherical and exhibited a more compact structure after coating with SPIHs. Subsequent flow cytometry analysis showed that the diameter and number of vesicles would increase due to vesicles rupturing or reorganizing after phospholipid oxidation during the electroformation of liposomes to produce SPIHs-liposomes. While the phospholipid oxidation level of the original liposomes was 42.13%, the phospholipid oxidation level of SPIHs-liposomes did not exceed 25%, indicating that the optimal balance between electroformation parameters and phospholipid oxidation level was obtained. These results may provide novel insight into the implications of SPIHs-modified liposomes as functional additives.

Antifungal characterizations of a novel endo-β-1,6-glucanase from Flavobacterium sp. NAU1659

β-1,6-Glucan plays a crucial role in fungal cell walls by linking the outer layer of mannoproteins and the inner layer of β-1,3-glucan, contributing significantly to the maintenance of cell wall rigidity. Therefore, the hydrolysis of β-1,6-glucan by β-1,6-glucanase directly leads to the disintegration of the fungal cell wall. Here, a novel β-1,6-glucanase FlGlu30 was identified from the endophytic Flavobacterium sp. NAU1659 and heterologously expressed in Escherichia coli BL21 (DE3). The optimal reaction conditions of purified FlGlu30 were 50℃ and pH 6.0, resulting in a specific activity of 173.1 U/mg using pustulan as the substrate. The hydrolyzed products of FlGlu30 to pustulan were mainly gentianose within 1 h of reaction. With the extension of reaction time, gentianose was gradually hydrolyzed to glucose, indicating that FlGlu30 is an endo-β-1,6-glucanase. The germination of Magnaporthe oryzae Guy11 spores could not be inhibited by FlGlu30, but the appressorium formation of spores was completely inhibited under the concentration of 250.0 U/mL FlGlu30. The disruptions of cell wall and accumulation of intracellular reactive oxide species (ROS) were observed in FlGlu30-treated M. oryzae Guy11 cells, suggesting the significant importance of β-1,6-glucan as a potential antifungal target and the potential application of FlGlu30.Key points• β-1,6-Glucan is a key component maintaining the rigid structure of fungal cell wall.• β-1,6-Glucanase is an antifungal protein with significant potential applications.• FlGlu30 is the first reported β-1, 6-glucanase derived from Flavobacterium.

Liquefaction pathway of corn stalk cellulose in the presence of polyhydric alcohols under acid catalysis

In this paper, the experiment of cellulose from corn stalk using 1, 2-propylene glycol (PG) and diethylene glycol (DEG) liquefaction catalyzed by phosphoric acid at atmosphere pressure was carried out. The effect of reaction time on the structural changes of cellulose in the liquefaction process of polyhydric alcohols was investigated, aiming at understanding the mechanism of cellulose liquefaction reaction under the action of acid catalyzed polyhydric alcohols. It was found that the liquefaction yield increased first and then decreased with the extension of reaction time, and reached the highest at 150 min (99.34 %). In the phase of increasing liquefaction yield, cellulose was degraded and translated into glucose, which was then converted into plenty of glycosides with PG/DEG. These glycosides were further converted into low molecular weight (LMW) substances such as hydrocarbons, acids, alcohols, esters, ketones, and ethers. At this time, the biofuel contained 70 %–85 % compounds with carbon number less than 25 and 5 %–10 % compounds with carbon number more than 25. As the prolongation of reaction time (after 150 min), quantities of unstable free radicals formed by cellulose degradation could combine with each other or with hydrogen atoms provided by PG/DEG to produce relatively stable macromolecular substances. That is, the polydispersity (Mw/Mn, abbreviated Ð = 1.28) of the generated biofuel at this stage no longer decreased. However, liquefaction residue produced at 240 min had changed essentially, which was completely different from the liquefaction residue produced in the early stage of liquefaction. In conclusion, this paper revealed the partial reaction process of cellulose by studying the structural changes in the liquefaction process of polyhydric alcohols, which laid a theoretical foundation for exploring the liquefaction mechanism of cellulose.

Experimental and DFT studies on using Fenton reagent as oxidant to enhance the leaching of cuprite in sulfuric acid system

The utilization of a Fenton reagent was implemented within this investigation to facilitate the oxidation of cuprite with the purpose of enhancing its leaching efficacy in sulfuric acid. The concentration of 0.007 mol/L Fenton reagent increased the extraction rate of cuprite from 69.43 to 91.53 %, which increased by 22.1 %. The XPS, AFM, SEM–EDS, and ToF-SIMS results showed that the leaching process of cuprite significantly enhanced its oxidation and the conversion of Cu(I) species to Cu(II) species by the Fenton reagent；Electrochemical tests revealed that as the concentration of the Fenton reagent increased, the strength of the oxidation reaction increased. After the adsorption of hydroxyl radicals (•OH) onto the cuprite surface, the population of Cu12-O12 decreased notably from 0.45 to 0.26, concomitantly with an expansion in bond length from 1.824 Å to 1.930 Å. As the population of Cu12-O7 decreased from 0.39 to 0.05, the bond length exhibited a notable increase from 1.849 Å to 2.241 Å. The findings indicated that following the adsorption of •OH on the cuprite (111) surface, structural instability ensued. The EPR test confirmed that the introduction of Fenton reagent into the reaction system generated •OH. Simultaneously, with the extension of reaction time, the concentration of •OH in the system decreased, resulting in a reduction of the signal peak intensity.

Oxidative conversion of polycyclic aromatic hydrocarbon phenanthrene by potassium ferrate

Targeting the more and more serious pollution issue caused by recalcitrant bio-toxic organic pollutants in slightly polluted water sources in recent years, the oxidative conversion of polycyclic aromatic hydrocarbon phenanthrene in slightly polluted water by potassium ferrate derived from calcium hypochlorite was studied in this paper. The results showed that the potassium ferrate prepared exhibited obvious spectral absorption in the visible light region, with the maximum absorption value of 0.13 at 510 nm. In addition, the product showed good stability, and the preferable pH range for stability was 9∼10.5, which was wider than the traditional pH range of 9.4∼9.7. This wider pH range increases the application range. The preferable oxidation reaction time with potassium ferrate was preliminarily determined to be 10 minutes. Under the condition of the potassium ferrite content of 8 mg/L, the oxidative conversion rate of phenanthrene reached 97.88%, and the degradation effect for phenanthrene was obvious. With the extension of reaction time, the degradation effect would be further enhanced.

Effective degradation of atrazine by spinach-derived biochar via persulfate activation system: Process optimization, mechanism, degradation pathway and application in real wastewater

Herein, biochar derived from spinach remnants was prepared for the first-time for the utilization in persulfate (PS) activation to effectively degrade atrazine. Characteristics of the prepared biochar were explored using advanced analyses. Control experiments implied the efficient activation of PS in the presence of the synthesized biochar. The highest degradation of atrazine (99.8%) could be attained at atrazine concentration of 7.2 mg/L, PS concentration of 7.7 mM, biochar dose of 1.88 g/L and reaction time of 120 min. The prepared biochar displayed a high recyclability performance attaining degradation ratios of 98.2, 96.53, 96.4, 92.8 and 88% in five sequential cycles under the optimum conditions. The degradation mechanism was explored showing that sulfate radicals were the prime reactive species in the degradation system. The degradation intermediates were specified, and the degradation pathways were propositioned. The highest REs in agrochemical industrial wastewater reached 80.21 and 83.43% of atrazine and TOC after 2 h. NH3 (348.4 mg/L) was reduced to 168.3 mg/L (RE: 51.7%) while level of NO3 (94.7 mg/L) was increased by 98.8% (188.3 mg/L) in the treated effluent due to oxidation of NH3 to nitrite and then nitrate. Extension of reaction time could contribute to achieving full mineralization of the real wastewater due to the residual PS after 120 min. The effectiveness and low-cost of biochar@PS system as well as its high performance in degrading real wastewater support the efficiency of the prepared biochar to be applied on an industrial scale.

Modification of Inclusions by Rare Earth Elements in a High-Strength Oil Casing Steel for Improved Sulfur Resistance

Steel casing pipes used in the construction of deep oil wells usually require both high strength and corrosion-resistant behavior. Due to the exploration of deep H2S-bearing oil reservoirs, sulfide stress cracking (SSC) is becoming an increasingly serious concern for casing steel. The nonmetallic inclusions in the steel are among the key reasons for its service failure. The rare earth element Ce can be used to modify the inclusions in casing steel and improve its SSC resistance. Here, taking C110 grade casing steel (the highest class currently in service) as the investigated object, the modification behavior of Ce inclusions in the steel and the effect of the addition of Ce in varying amounts (0.01, 0.024, and 0.042 wt.%) on the modified products were studied through high-temperature tube furnace experiments and thermodynamic calculations. The results showed that Ce had an obvious modification effect on the CaO·Al2O3 inclusions in casing steel, and the diffusion of dissolved Ce in the steel was the limiting step of the modification reaction. With the extension of reaction time, the sequence describing the modification of inclusions in the steel was determined as follows: CaO·Al2O3 → CeAlO3 → Ce2O3/Ce2O2S. The final stable product after modification depended on the amount of Ce added. With 0.01 wt.% Ce, the stable phase in molten steel was Ce2O3; on the other hand, upon adding ≥0.024 wt.% Ce, the stable phase became Ce2O2S. In addition, the thermodynamic stability of Ce2O3 decreased, and it was transformed into CeAlO3, Ce2O2S, Ce2S3, and CeS during solidification. On the basis of our results and the considerations for smooth casting, the addition of a proper amount of a rare earth element is suggested for industrial trials, following the achievement of a significant and surprising improvement in the qualified rate of SSC resistance for the final steel products. The relevant mechanism is also analyzed.

Driver’s distraction and its potential influence on the extension of reaction time

The driver's reaction time is one of the most important parameters for the road pre-accident analysis. There are known the results of tests, in which the value of this parameter was determined in expected and unexpected road situations. But in some cases, this time may be longer e.g. in situations in which the driver's attention may be distracted by keeping observations other than the area, in front of the car's surroundings. There are many manoeuvres, when the driver is obliged to observe many areas at the same time. Thus, his attention must be turned away from the main area – in front of the vehicle. The paper presents the results of tests involving the measurement of the driver's attention time focused on observing the surrounding other than the car's path. During the test, the driver's attention was focus on observing the side and back mirror, car radio and at the mobile phone. Certain values can be potentially considered as extending the typical driver's reaction time. The results of the presented tests have practical applications and can be used in the process of issuing opinions on traffic accidents.

A Cleavable Self-Inclusion Conjugate with Enhanced Biocompatibility and Antitumor Bioactivity

A Cleavable Self-Inclusion Conjugate with Enhanced Biocompatibility and Antitumor Bioactivity

Structural characteristics and acid-induced emulsion gel properties of heated soy protein isolate–soy oligosaccharide glycation conjugates

Glycation conjugates were prepared by heating the mixed dispersions of heat-denatured soy protein isolate (HSPI) and soy oligosaccharide (SOS) at 90 °C for 30, 60, 90 and 120 min. The structural characteristics and acid-induced emulsion gel properties of HSPI–SOS conjugates were investigated. The results of degree of graft, pH, intermediates and browning intensity showed that the degree of glycosylation gradually increased with the extension of reaction time, but it decreased at 120 min of reaction. The changes of the absorption peaks in infrared spectra confirmed that HSPI was covalently linked with SOS to form HSPI–SOS conjugates through Maillard reaction. The glycosylation of HSPI with SOS resulted in the transformation form α-type to β-type secondary structure, the reduction in free sulfhydryl groups, and the enhancement of surface hydrophobicity. These structural changes of HSPI–SOS conjugates could influence their glucono-δ-lactone-induced emulsion gel properties. Although the glycosylation decreased the storage modulus of HSPI emulsion gels, the 60 min glycated conjugates accelerated the gelation rate of the emulsions. The conjugate emulsion gels had higher gel hardness and water holding capacity, which exhibited more compact microstructure with smaller and more uniform emulsified oil droplets. Moreover, the glycosylation of HSPI with SOS for 60 min improved the thermal stability of conjugate emulsion gels. Therefore, the structure of HSPI–SOS conjugates can be modified by controlling the degree of glycosylation to improve the physicochemical properties and stability of the emulsion gels.

Degradation of tetracycline hydrochloride in sub- and supercritical water with and without oxidation

In the present work, in a batch quartz tube reactor, supercritical water gasification and supercritical water oxidation were used to treat tetracycline hydrochloride (TC). The results show that the increase in temperature, the extension of reaction time, and the decrease in initial concentration all had a positive impact on the removal of TC. After adding 0.108 mol/L H2O2 (n = 1), the removal rate reached 100% at 1000 mg/L, 400 °C and 100 s. First-order degradation kinetics was used to fit the degradation of TC. In the absence of H2O2, its pre-exponential factor and activation energy were found to be 0.03 s−1 and 6.14 kJ/mol, respectively. After adding H2O2, its pre-exponential factor and activation energy were found to be 6.70 s−1 and 25.66 kJ/mol, respectively. The degradation process of TC was explored and the results show that TC can be degraded into smaller molecular substances in supercritical water. After adding H2O2, the degradation efficiency of TC was significantly improved the degradation process was also more thorough. There were two main degradation processes, namely the ring-opening reaction and the central carbon cracking.

Effect of high-pressure detonation products on fuel injection and propagation characteristics of detonation wave

The effect of high-pressure detonation products on fuel injection and propagation characteristics of detonation wave has been investigated in the form of ion voltage by varying the equivalence ratio (ER), air mass flux, and operation duration with hydrogen-air mixtures. It has been shown experimentally that the ion voltage decays gradually during the initial stage of rotating detonation wave (RDW). The attenuation of ion voltage is a general phenomenon, and the decay rate of ion voltage and its peak value of the trough state are related to the equivalence ratio and air mass flux. The analysis of interaction between the combustor and hydrogen plenum indicates that the feedback of high-pressure detonation products leads to the attenuation of ion voltage. In addition, the long-duration tests show that the ion voltage will recover to a steady state with the extension of reaction time, when the purgation (products leaving plenums) of detonation products is greater than feedback (products entering plenums) of detonation products in the hydrogen plenum. The recovery of ion voltage starts earlier at the higher equivalence ratio and air mass flux, and the peak value of ion voltage in the steady state also increases with the increase of equivalence ratio and air mass flux. A low frequency oscillation about 10–12 Hz occurs in the RDW at some operation conditions. This low frequency oscillation is related to the interaction between the combustor and hydrogen plenum, and can be eliminated by either increasing the equivalence ratio or decreasing the air mass flux.

Coke formation during the pyrolysis of bio-oil: Further understanding on the evolution of radicals

The radical reactions dominate the thermochemical conversion reaction network of organics. Bio-oil, as the liquid organic fuel, has many potential applications via thermochemical conversion, while the coke formation is a particularly serious problem in these processes. To clarify the effects of radical reactions on the coke formation during the pyrolysis of bio-oil at 200–500 °C, the stable radicals in the pyrolytic products were measured by the Electron Paramagnetic Resonance (EPR) spectrometry, and the active radicals during pyrolysis were quantified by amounts of hydrogen donated by 9,10-dihydrophenanthrene (DHP). The results indicated that the amount of stable radicals generated after bio-oil pyrolysis was proportional to temperature, and these stable radicals were trapped in solid coke due to the steric hindrance effect of coke structure. The content of oxygen-containing radicals and heteroatoms decreased with the increase of temperature. However, the increase of temperature and the extension of reaction time were more favorable to the formation of the σ and π type oxygen-containing radicals and aromatic radicals. The amount of stable radicals was about 0.25–1.5% of the amount of active radicals during bio-oil pyrolysis. When DHP effectively blocked the reaction of the active radical, the polycondensation reaction of bio-oil was inhibited, and the content of coke precursor was significantly reduced, thus inhibiting the formation of coke during the bio-oil pyrolysis.

Mechanisms of hydrides’ nucleation and the effect of hydrogen pressure induced driving force on de-/hydrogenation kinetics of Mg-based nanocrystalline alloys

Aiming to gain insight on the hydrogen storage properties of Mg-based alloys, partial hydrogenation and hydrogen pressure related de-/hydrogenation kinetics of Mg–Ni–La alloys have been investigated. The results indicate that the phase boundaries, such as Mg/Mg2Ni and Mg/Mg17La2, distributed within the eutectics can act as preferential nucleation sites for β-MgH2 and apparently promote the hydrogenation process. For bulk alloy, it is observed that the hydrogenation region gradually grows from the fine Mg–Ni–La eutectic to primary Mg region with the extension of reaction time. After high-energy ball milling, the nanocrystalline powders with crystallite size of 12∼20 nm exhibit ameliorated hydrogen absorption/desorption performance, which can absorb 2.58 wt% H2 at 368 K within 50 min and begin to desorb hydrogen from ∼508 K. On the other side, variation of hydrogen pressure induced driving force significantly affects the reaction kinetics. As the hydrogenation/dehydrogenation driving forces increase, the hydrogen absorption/desorption kinetics is markedly accelerated. The dehydrogenation mechanisms have also been revealed by fitting different theoretical kinetics models, which demonstrate that the rate-limiting steps change obviously with the variation of driving forces.

Eco-Friendly Extraction of Lead from Galena by In Situ Electrochemical Reduction in ChCl-EG Deep Eutectic Solvent

One-step electrochemical extraction of metallic lead from solid galena in choline chloride-ethylene glycol deep eutectic solvent (ChCl-EG DES) was studied for the first time. Cyclic voltammetry on a Pt powder microcavity electrode shows that solid galena can be directly reduced to metallic lead by a one-step, two-electron transfer reaction at a potential of −0.47 V (vs Ag). The constant voltage electrolysis using galena powders as cathode in the range of 5 h to 30 h reaction time and 3.0 V to 3.8 V cell voltage further proves that metallic lead can be obtained at the cathode. With the extension of reaction time, the morphology of lead powders transforms from interconnected wax to irregular rod-like and needle particles. As the cell voltage is elevated, the microstructure of metallic lead changes from irregular flake and rod to nano-needle particles. The direct electrolysis process of solid galena is analyzed, and a schematic diagram is also exhibited. It is pointed out that the close contact between galena powders and current collector is the key to facilitate the in situ reduction. These findings put forward a green and convenient route for direct extraction of metals from sulphide ores at near room temperature.

Characteristics of Dissolved Organic Matter in Overlying Water During Algal Bloom Decay

In this study, indoor simulation experiments were performed to elucidate the effects of migration and transformation of dissolving organic matter (DOM) during the decay of algal blooms. Based on ultraviolet-visible spectra (UV-vis) and excitation-emission matrix spectroscopy (EEMs), spectral characterizations of dissolved organic matter (DOM) in overlying water were evaluated with analyses of the physical and chemical indexes, variation in dissolved organic carbon (DOC), and variation in dissolved inorganic carbon (DIC). Results showed that at the early stage of decay, a large amount of organic matter was released, and dissolved oxygen (DO) decreased sharply. With the extension of reaction time, DOC gradually changed into DIC, which further changed the oxidation-reduction and acid-base characteristics of the water. UV-vis spectra showed that a large amount of DOM was released with high aromaticity and a high degree of humification, and the released DOM was gradually degraded. With the application of parallel factor analysis in excitation-emission matrix spectroscopy (EEM-PARAFAC), three fluorescence components were analyzed:refractory humic-like substances (C1), protein-like tryptophan substances (C2) produced by algae, and fulvic-like substances (C3) related to microbial activities. Most protein-like tryptophan substances were degraded into fulvic-like substances by microorganisms during the decaying process. Heterotrophic microorganisms promoted the release of algae-derived DOM and accelerated the degradation of DOM. The DOM born during algae blooms decaying process was eventually converted into humic-like substance, which was difficult to be degraded. We analyzed correlations of water quality, UV-vis spectrum, and EEMs parameters. Results showed that ORP was positively correlated (P<0.05) with DO. There was a significant negative correlation (P<0.05) between pH and DOC, which was consistent with the trend of the transformation to from DOC to DIC; C1 was positively correlated (P<0.05) with Fn355; and C2 was significantly positively correlated (P<0.05) with DOC and Fn280; C3 was positively correlated (P<0.05) with FI, BIX and β:α. The variation trend of these spectral parameters was consistent with that of DOM components. In summary, with the analyses of water quality characteristics and spectral characteristics of DOM in overlying water during algae blooms decaying process, it was expected that our results could contribute to the further exploration of the dynamic migration and transformation of lake DOM and the changes of carbon cycling.

Copper-Catalyzed Highly Enantioselective 1,4-Protoboration of Terminal 1,3-Dienes

Copper-Catalyzed Highly Enantioselective 1,4-Protoboration of Terminal 1,3-Dienes

CoMoO4 Nanoneedles/Carbon Cloth for High‐Performance Supercapacitors: Maximizing Mass Loading by Reaction Time

AbstractHerein, CoMoO4 nanoneedles were first directly grown on carbon cloth through a facile one‐pot water bath method. Interestingly, with the extension of reaction time, the mass loading of CoMoO4 on carbon cloth (CoMoO4/CC) increases gradually. As a pseudocapacitors material, the CoMoO4/CC electrode obtained at 10 hour (CoMoO4/CC‐10) displays a higher specific capacitance (2100 F/g at a current density of 1 A/g) than those of the other CoMoO4/CC electrodes. Furthermore, the CoMoO4/CC‐10 electrode also shows a good rate performance 64.29 % and excellent cycle property 94.53 % after 10000 cycles. An asymmetric supercapacitor device using the CoMoO4/CC‐10 as a positive and active carbon (AC)/CC as a negative electrode achieves high specific capacitance 184 F/g at the current density of 1 A/g, specific energy 65.42 Wh/kg (with the specific power 2880 W/kg), specific power 12000 W/kg (with the specific energy 40.18 Wh/kg) and cycle performance 94.29 % after 10000 times. These electrochemical performances demonstrate the as‐prepared CoMoO4 nanoneedles will be a promising pseudocapacitor material for application in energy storage.

Study on the Performance of Pd-Catalyst Based on Decolorization Rate

The simulated azo dye waste-water was treated by Catalytic Wet Oxidation. The catalyst was prepared by impregnation method, and FSC (main component: γ-Al2O3) was used as the catalyst carrier, and 6wt%Cu, Fe, Pd and La were added. The catalyst was dynamically impregnated at 35 °C for 8 h, dried at 110 °C for 10 h, and roasted at 450 °C for 3h to prepare the supported catalyst. Based on the decolorization rate of treated waste-water, the effect of component composition on catalyst performance was investigated. In the CWAO treatment of waste-water, the pH of the treated effluent first decreased and then increased with the extension of reaction time; with the extension of reaction time, organic matter degrades continuously, the absorbance of waste-water decreases and the decolorization rate increases. Cu-Fe-Pd-La/FSC (ratio 0.75:0.75:1.5:3) has the best treatment effect; the metal dissolution concentration of the waste-water increases with the reaction time. Cu and Al are relatively stable, and the dissolution concentration in treated effluent is between 0.5 and 3.0 mg/L. The results showed that the Cu-Fe-Pd-La/FSC catalyst composed of Cu: Fe: Pd: La=1:1:1:3 had good catalytic activity and stability.

High-performance Al separation and Zn recovery from a simulated hazardous sludge

Zn2+ is a heavy metal ion, and hazardous sludge from the electroplating and alloy industry is rich in Zn and impure Al and Ca. Such sludge is commonly recycled by dissolution in strong acid and then selective extraction to recycle Zn2+ by a special extraction reagent. In this process, impurity Al3+ is dissolved and then participates in the extraction of Zn2+, so Al3+ should be removed first. Here, a new strategy was reported for the effective removal of Al3+ and recovery of Zn2+ from a simulated Al/Zn-bearing sludge via an improved acid solution–precipitation route. The sludge was simulated by coagulating Zn-bearing waste water (290 mg/L Zn2+) with 600 mg/L polyaluminium chloride. The sludge was dissolved in sulphuric acid and nitric acid to form an acidic solution with Al3+ and Zn2+ concentrations of 3.2 g/L and 5.7 g/L, respectively. The solution was treated directly by hydrothermal method at 270 °C, in which 55% Al3+ was precipitated as boehmite and Al hydroxide. After the addition of 0.2 mL of ethylene glycol, the removal rate of Al3+ dramatically increased to 99.8%, with Zn2+ loss of 1.5%. The residual Zn2+ was 5620 mg/L in the treated solution and further directly precipitated by adjusting the pH of the solution to pH 7.5 with NaOH. The precipitated Zn2+ was in the form of simonkolleite with ZnO content of 63.1%, with Al content of only 0.8%. In the hydrothermal precipitation, the removal rate of Al3+ increased with the temperature and extension of reaction time. Al3+ was hydrolysed and precipitated as aluminium oxonium sulphate hydroxide and then recrystallised in boehmite form. Then, H+ was generated and consumed in the redox reaction of nitrate and ethylene glycol, accelerating the Al3+ precipitation. This method provides a way to efficiently separate Al3+ from a Zn-bearing solution and can be applied in the recycling of Al/Zn-bearing sludge.