Physiochemical Structure Research Articles

Decoupling study on the influence of the interaction between biomass hydrochar and coal during co-pyrolysis on the char structure evolution

Co-pyrolysis of biomass hydrochar (biomass processed by hydrothermal carbonization, HTC) and coal, is a viable method for the clean and high-efficiency co-utilization of conventional and renewable resources. Interaction between biomass hydrochar and coal during co-pyrolysis directly impacted the physiochemical structure evolution of char and its downstream application. However, interaction mechanism hasn't been systematically revealed till now. Therefore, this study conducted a decoupling investigation on co-pyrolysis of rice straw hydrochar (RSH) prepared at different HTC conditions and bituminous coal (BC) using a staged fixed-bed reactor. The results demonstrated that RSH volatiles increased the number of deposits and cracks formed on the surface of co-pyrolysis decoupled BC char. Additionally, volatiles from RSH prepared at higher HTC temperatures led to the decrease of surface deposits, surface functional groups (such as –OH, C–H, and C–O) and graphitization degree of BC char. However, volatiles prepared at different solid-liquid ratios had a negligible impact on physicochemical structure of BC char. At HTC temperature of 200 °C, volatiles from BC led to increased surface functional groups (such as –OH and CC) and graphitization degree of co-pyrolysis decoupled RSH char. Furthermore, volatiles from BC showed more noticeable effect on graphitization process of RSH char prepared at higher solid-liquid ratio.

Biochemical characterization, and anti-inflammatory and antitumor activities of glycoprotein from lamb abomasum.

Lamb abomasum is used as an edible medicinal source in traditional Chinese medicine for the treatment of gastrointestinal disorders. Lamb abomasum sourced biochemical drug Lamb's trip extract and Vitamin B12 capsule used for the clinical treatment of chronic gastritis, gastric ulcer, and reversal of intestinal metaplasia. Therefore, claimed to have prevention of gastric cancer activity. In this study, we aim to assess whether the glycoprotein has biological activity in the cure of gastric disorder and conduct a structure-activity relationship. Glycoproteins' extraction conditions were optimized by the response surface method and purified with DEAE-cellulose and Sephadex G-50 chromatography. Two homogenous glycoproteins' physiochemical structures were studied with electrophoresis, HPLC analysis, peroxide oxidation, and β-elimination, FT-IR, CD, LC-MS/MS, and EDS analysis. The antiinflammation activity of the glycoprotein was determined against COX-2 and LOX-15 enzyme inhibitory ability in vitro, and antitumor activity against HT-29 and HGC-25, and cytotoxicity on L-02cells was determined in vivo with the MTT method. The abomasum was abundant in glycoprotein and the extraction yield of glycoprotein was up to 24.6±2.1% under optimized conditions. Two homogeneous glycoproteins SAGP-I and SAGP-II determined to be ribose-conjugated and sulfated glycoproteins with a molecular weight of 15.6kDa and 6.4kDa. And according to the structural analysis, SAGP-I was a mucin-type ribose-conjugated glycoprotein with 14 O-glycosylation and one N- glycosylation site. SAGP-I and SAGP-II have remarkable anti-inflammatory activity against COX-2 enzyme with the IC50 of 17.64±1.25μg/mL and 16.14±1.11μg/mL, respectively. Meanwhile, the two glycoproteins showed strong antitumor activity against HT-29 with the EC50 of 19.19±1.46μg/mL and 184.9±5.6μg/mL, respectively. The Highly purified glycoprotein SAGP-1 and SAGP-II showed anti-inflammatory activity against the COX-2 enzyme, and antitumor activity against HT-29 human colon cancer cells and noun-inhibitory activity against LOX-15 enzyme and HGC-25. Both glycoproteins are ribose conjugated and sulfated whose characters are related to their anti-inflammatory and anti-tumor activity. Such results suggest the possibility of anti-inflammatory and pre-cancer activity. And in some degree explains the pharmacy of abomasum's traditional use in gastric disorder and clinical use of lamb abomasum APIs drugs' in gastric disorders and gastric cancer development. This study provides a preliminary basis for the further study of the per-cancer mechanism of lamb abomasum glycoprotein. And, would be the material basis of the clinical use of Lamb's trip extract and Vitamin B12 capsule.

Defect-Engineered MnO2 as Catalyst for the Chemical Mechanical Polishing of Silicon Carbide Wafer

Chemical mechanical polishing (CMP) of SiC wafer is challenging due to its extreme hardness and inertness. Catalyst assisted CMP is a cost-effective approach to increase material removal rate (MRR) without sacrificing surface quality. Herein, oxygen-deficient α-MnO2 was prepared by mechanochemical synthesis and the effect of catalyst physiochemical structure on the CMP performance of Si-face SiC wafer was systematically studied. The addition of 1% α-MnO2 catalyst increased MRR by 38.8% to 1.11 μm h−1, much higher than commercial γ-MnO2. The synergy of phase structure, oxygen vacancy and surface area & porosity contributed to the high catalytic activity. α-MnO2 is an outstanding oxidation catalyst due to its stable framework, large tunnel size, rich surface area and porosity, which can facilitate the adsorption, activation and transfer of guest species and intermediates and therefore affects the reaction pathway and reaction kinetics. Mechanochemical synthesis generates nano MnO2 particles with rich oxygen vacancies. The presence of more surface oxygen vacancies can improve oxidizing activity of MnO2 catalyst, facilitating the oxidation of C species on wafer surface. The use of defect-engineered α-MnO2 catalyst is promising for overcoming the present bottlenecks of long processing time and high cost of current CMP of SiC wafer.

Transforming interface properties of wood laminate composites functionalized by adhesive penetration

Quantitative analysis of interface mechanical properties of wood laminate composites has been an urgent task of the interface mechanics, however, which is hindered by the lack of knowledge of the correlation between physiochemical structure and micromechanics of the whole wood bonding interphase. This work aimed to evaluate the influence of adhesive distribution with different variables (i.e., adhesive types, grain directions, and cells from the glue line) on the transforming interface properties. The results showed that the physiochemical structure and micromechanics performance were significantly affected by adhesive types, grain directions, or wood cells with the interphase microstructure of earlywood laminates being more sensitive to adhesive penetration than that of latewood laminates. The Phenol-formaldehyde (PF)-laminated interphase possessed a more complicated resin behavior and distribution, and microstructure compared to the one component polyurethane (1C-PUR)-laminated interphase. The distribution of resins near the glue line could recover and enhance the loss of the Er caused by the pressing and machining process. Compared with the control cells (C1, C2), the improved range of Er and H are 9.2%–41.2% and 6.7%–22.2% for the PF-laminated interphase, respectively, and 1.7%–27.6% and 2.1%–8.5% for the 1C-PUR-laminated interphase, respectively. This improvement was mainly attributed to chemical fixing and physical filling into nanopores and physical supporting within cell walls, which could avoid the stress concentration to a different extent and protect the cell walls from the compressive deformation. The initial cracks probably resulting from the machining and/or shear slipping during the pressing process, could incur the global failure of wood laminates interphase.

IMPACT OF HYDROFLUORIC (HF) ACID TREATMENT ON MORPHOLOGICAL AND CHEMICAL STRUCTURE OF AGRICULTURAL WASTES

Acid, base and/or water treatments expand biomass utilisation by reducing ash contents and improving energy density and higher heating values. Dilute acid treatment results in negative impacts on the physiochemical structure of biomass. This study aimed to analyse the effects of hydrofluoric (HF) acid (5% w/w) on the morphological and chemical structure of Wheat Straw (WS), Cotton Stalk (CS) and Rice Husk (RH). Scanning Electron Microscopy (SEM) exposed physical changes after treatment, and Fourier Transform Infrared (FTIR) spectroscopy was used to evaluate the changes in available functional groups in the composition of biomass samples. Dilute HF resulted in pronounced changes in morphology and chemical functional groups of all biomasses. Proximate analysis showed carbonaceous material is also affected; the increment in volatiles (9.27%, 7.7% and 6.9% for RH, WS and CS, respectively) and fixed carbon was observed while ash contents reduced. Furthermore, the influence of all samples on the thermal processing of biomass is compared.
 Keywords: biomasses, acidic pretreatment, ash contents, morphology, aromaticity

Catalytic upgrading of cow manure pyrolysis vapors over zeolite/carbon composites prepared from coal gasification fine slag: High quality bio-oil obtaining and mechanism investigation

The resource utilization of solid waste not only reduces the environmental pollution, but also reduces the use of fossil energy. In this study, three low-cost zeolite/carbon composites, including Y-type zeolite/carbon, Beta zeolite/carbon and ZSM-5 zeolite/carbon, were prepared from coal gasification fine slag (CGFS), which were used for catalytic upgrading of pyrolysis vapors of cow manure (CM). The composition and distribution of products from the catalytic pyrolysis of CM over different types composites were explored, and the relationship between catalysts structure and product selectivity was clarified. The results show that different types of catalysts have virous effects on the composition and distribution of products due to different physiochemical structures such as pore size and acid site. Among them, ZSM-5 zeolite/carbon is more conducive to the formation of monocyclic aromatics due to its shape selective catalysis, Beta zeolite/carbon has relatively large pore size and has high selectivity for polycyclic aromatics, and Y-type zeolite/carbon is more conducive to the removal of nitrogen and oxygen-containing compounds. Moreover, vanillin, glucose and valine, which are the main components of lignin, cellulose and protein in CM were selected as model compounds to reveal the reaction mechanism of catalytic upgrading. The results of this study can provide reference and theoretical guidance for the comprehensive utilization of solid waste and the development of low-carbon green industry.

One-pot synthesis of CNT-SAPO-34 composite supported copper and cerium catalysts with excellent surface resistance to SO2 and H2O in NH3-SCR

CuCe/CNTx-SAPO-34 (x = 0, 0.5, 1, 2) with various CNT doping quantities were synthesized through the one-pot hydrothermal synthesis method using CNT and SAPO-34 as composite supporters. The selected CuCe/CNT1-SAPO-34 catalyst exhibits remarkable SCR activity and high H2O/SO2 resistance in a wide temperature range of 200–450 °C. X-ray diffraction (XRD), N2 adsorption–desorption, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), H2-temperature programmed reduction (H2-TPR), and NH3-temperature programmed desorption (NH3-TPD) were used to characterize the physiochemical structure, surface state of active sites reducibility, and surface acidity of the catalysts. The characterization results reveal that CuCe/CNT1-SAPO-34 possesses a hierarchical structure, small particle size, high levels of surface Cu2+, Ce3+ and chemisorbed oxygen, enhanced reducibility, and suitable surface acidity. For comparison, CuCe/CNT1-SAPO-34 (P) mixed mechanically with CuCe/CNT0-SAPO-34 and CNT was investigated through the NH3-SCR with and without H2O/SO2, it also displays lower resistance of H2O and SO2 than CuCe/CNT1-SAPO-34. The catalytic performance made CuCe/CNT1-SAPO-34 a promising catalyst for the NOx emission control from diesel vehicles.

Investigation of the Physiochemical Structure and UV Absorption Properties of Cottonseed Hull and Kernel

This work has investigated the morphology, chemical structure and UV absorption properties of cottonseed hull and kernel, as part of an assessment of these materials for use as potential UV absorbing and/or medical compounds. The morphological analysis of the samples revealed that cottonseed kernel has a porous and homogenous morphology. By comparing the FTIR of cottonseed hull and kernel, it was found that the kernel sample has more polyphenol groups. Moreover, an examination of the UV absorption spectra showed the kernel tissue had stronger absorption spectra in both the UVA (320-400nm) and UVB (290-320nm) regions than material from the hull. Thus, the present study demonstrated that the cottonseed kernel could be a promising source of natural UV absorber.

The alleviation of lignin inhibition on enzymatic hydrolysis of cellulose by changing its ultrastructure

Lignin is regarded as the primary factor that inhibits enzymatic hydrolysis of cellulose. However, the impact of cellulose ultrastructure on the inhibition of lignin during enzymatic hydrolysis is still unclear. In this work, the addition of lignin during enzymatic hydrolysis of cellulose with different ultrastructure was investigated. Furthermore, the influences of changing cellulose ultrastructure on cellulose conversion of pine after hydrothermal treatment (HT) without and with additives (2-naphthol (2 N) and phloroglucinol (PL)) were explored in detail. The results showed that enzymatic hydrolyzability of allomorphic cellulose was strongly inhibited by lignin. In contrast, a small inhibition degree of lignin was observed for amorphous cellulose. Surprisingly, the cellulose conversion of HT treated pine was dramatically decreased (18.45–6.25%) after ball-milling treatment (BM), while it was significantly increased (18.45–74.49%) after concentrated phosphoric acid treatment (CP). In addition, the addition of 2 N or PL during HT could promote or inhibit cellulose conversion due to the changes in the condensation degree of lignin. These results indicated that the physiochemical structure of lignin has a significant effect on cellulose hydrolysis. More importantly, the increasing degree of cellulose conversion was enhanced in sequence from HT+PL (6.19–35.00%), HT (18.45–74.49%), to HT+ 2 N (21.12–92.30%) after CP, which was attributed to the reducing lignin condensation and changing cellulose ultrastructure. Overall, this work demonstrated that the inhibition degree of lignin was highly dependent on the cellulose ultrastructure.

Surfactant assisted microwave irradiation pretreatment of corncob: Effect on hydrogen production capacity, energy consumption and physiochemical structure

The combination pretreatment strategy is an effective way to intensify photo-fermentative biohydrogen production (PFHP) process. In this study, the synergistic effects of microwave irradiation and surfactants on the hydrogen production performance, energy analysis and structural characteristics was evaluated. Results revealed that hydrogen production performance was improved after microwave irradiation pretreatment (MIP) and surfactants assisted microwave irradiation pretreatment (SMIP). SMIP group had a higher cumulative hydrogen yield (CHY) of 367.87 ± 6.481 mL compared with control group (223.26 ± 4.329 mL) and MIP group (303.66 ± 3.366 mL), which was an increase of 36.01% and 64.77%, respectively. Energy evaluation analysis showed that the energy ratio of SMIP (0.49) was higher than that of MIP (0.37) in the PFHP system, therefore, SMIP can save more energy. After SMIP, the corncob lignocellulose structure was greatly damaged, which was verified by SEM, FTIR, XRD and XPS analyses.

Structural changes, and anti-inflammatory, anti-cancer potential of polysaccharides from multiple processing of Rehmannia glutinosa

Polysaccharides play important roles in the bioactivities of Rehmannia glutinosa. This study examined the physiochemical structure and biological activity of the polysaccharides of R. glutinosa during nine steps of processing. Characteristic study showed galactose, glucose, and fructose were the major sugars in the polysaccharides. The percentage of the high-molecular weight polysaccharide increased after processing. In addition, polysaccharides from repeated steam and dry processing of R. glutinosa can effectively increase the anti-inflammatory activity. Secretions of tumor necrosis factor (TNF-α), interleukin (IL)-6, and transforming growth factor (TGF)β after lipopolysaccharide (LPS) stimulation were detected in RAW264.7 macrophages because of its anti-inflammatory activity. RG-B9, a polysaccharide of the ninth steam and dry processing, showed the strongest inhibitory activity on bacterial LPS-induced macrophage IL-6 and TGFβ production. Mechanically, RG-B9 down-regulated the phosphorylation of AKT/ERK. The anti-inflammation of RG-B9 involved AKT/ERK/JNK signaling. In addition, RG-B9 inhibited the viability of lung cancer cells via EGFR/AKT signaling.

Ca-Si-Al interactions induced char structure and active site evolution during gasification–A comparative study based on different gasifying agent

Catalytic steam gasification, as a promising technology for producing hydrogen-enriched syngas, has been a hotspot in recent studies. This study aims to analyze the role of calcium-silicon-aluminum (Ca-Si-Al) interactions in char gasification and distinguish the difference of the interaction in different gasifying agent. The gasification reactivity of coal char was closely linked with the physiochemical structure and the mineral interactions. It was found that whether in CO2 or H2O, the calcium oxide (CaO) has function to promote the generation of mesopores, which is beneficial to the diffusion of reactant and product gases. The scanning electron microscopy (SEM) images showed that no SiO2 particles agglomerated in coal char containing silicon-aluminum ((Si-Al)-coal), which was a good reason why Si-Al inhibited gasification severely; the well dispersed SiO2 particles have no function to adsorb the gasifying agent molecular to transfer oxygen. New minerals including Ca2Al2SiO7, Ca2SiO4 and CaSiO3 were formed in CO2 and H2O, while CaAl2Si2O8 only was detected in H2O. These new minerals exert a positive effect on active site in CO2 but negative effect in H2O. While in H2O, compared with active sites, the mesopores dominate the reaction more. Overall, the interactions catalyze gasification to a moderate degree whether in CO2 or H2O.

Insight into soot formed in coal combustion flame: Evolution of physiochemical structure, oxidation reactivity

Combustion experiments of a bituminous coal were performed on a flat-flame burner that provided a realistic low-O2 combustion atmosphere. Soot samplings were performed via both thermophoresis and dilution-filtering sampling methods along the flame centerline. The morphology, size, fractional- and nanostructure evolution, and especially the detailed oxidation characteristics of soot of different maturities in flame were comprehensively characterized. Results showed that liquidus tar was formed in the flame bottom which acted as soot precursor, and a direct evidence was obtained that the solid soot particles in the coal flame were mostly derived from the liquidous tar via carbonization. In the nanostructure of the mature soot particles, both of fullerenic, amorphous and diamond phases were detected, indicating a multiple nucleation process during the soot formation in coal flame. Furthermore, it was found that soot in the bright flame core was more difficult to be oxidized than the soot upstream and downstream it. And finally based on the Raman spectrum and particle micromorphology analysis, the non-linear change of the oxidation reactivity of the soot along the flame centerline was revealed to be controlled firstly by the gradual graphitization with increasing of the flame temperature and then by the change of soot aggregate size.

Examining the ultraviolet optical screening tool as a viable means for delineating a contaminated organic sediment

Rapid and accurate delineation of contaminated sediments in marine environments is critical for the effective assessment of site risks and the development of appropriate remedial action plans. In this study, a new application of the ultraviolet optical screening tool (UVOST) equipped with electrical conductivity measurement (UVOST-EC) is proposed to delineate a water-covered sediment contaminated with dioxins and furans in a decommissioned pulp and paper wastewater stabilization basin. Bench scale experiments are presented that were used to develop a UVOST-EC interpretation method for delineating between two different sediment types present in the basin: an anthropogenically derived organic rich contaminated sediment (“black sediment”) and a naturally occurring grey organic silt sediment with marine provenance (“grey sediment”). The method involves comparative analysis of fluorescence and electrical conductivity signatures between the two sediments. Results indicate that each sediment type presents unique “signatures” related to fluorescence and electrical signals which corresponds to variability in their physio-chemical structure. Almost 100 UVOST-EC tests performed at the study site were paired with ex situ physical gravity core measurements of the black sediment to test the accuracy of the UVOST-EC-based method. A statistical analysis at seven sample “cluster” sites (i.e. multiple sub-samples within a defined area) indicated that the mean of sediment thickness obtained by the UVOST-EC measurement technique at a given site were not significantly different (p = 0.05) from measurements derived from sediment gravity core measurements. The UVOST-EC-based sediment thickness delineation method reliably determined the thickness of the dioxin and furan contaminated sediments as compared to gravity core determination for the sediment in this study. Application of this approach to other studies should be assessed in a similar manner. The UVOST-EC method offers health and safety, cost, logistics, and data interpretation benefits.

Factors Affecting the Catalytic Efficiency and Synergism of Xylanase and Cellulase During Enzymatic Hydrolysis of Birch Wood.

Understanding factors that affect the catalytic efficiency and synergism of enzymes is helpful to enhance the process of bioconversion. In this study, birch wood (BW) was sequentially treated by delignification (DL), deacetylation (DA), and decrystallization (DC) treatments. The physiochemical structures of treated BW were characterized. Moreover, the influences of sequential treatments on the catalytic efficiency and synergism of xylanase and cellulase were studied. DL treatments efficiently improved the conversion of cellulose and xylan. A high degree of synergy (DS) between xylanase and cellulase was produced during hydrolysis of DL-treated BW. DA treatments enhanced xylan conversion but reduced the DS between xylanase and cellulase for xylan hydrolysis, whereas DC treatments enhanced cellulose conversion but reduced the DS between xylanase and cellulase for cellulose hydrolysis. The cellulose conversion of lithium chloride/N,N-dimethylacetamide (LiCl/DMAc)-treated BW (89.69%) was higher than the cellulose conversion of ball milling (BM)-treated BW (81.63%), whereas the xylan conversion of LiCl/DMAc-treated BW (83.77%) was lower than the xylan conversion of BM-treated BW (87.21%). This study showed that the catalytic efficiency and synergism of xylanase and cellulase are markedly affected by lignin hindrance, hemicellulose acetylation, and cellulose crystallization.

Char structural evolution characteristics and its correlation with reactivity during the heterogeneous NO reduction in a micro fluidized bed reaction analyzer: The influence of reaction residence time

Under simulated flue gas conditions, the effect of the residence time of different chars on the evolution of physiochemical structures during the NO reduction process was evaluated. The experimental data proved that the acid-soaking treatment contributed to the development of char structures. Both biomass chars and H-form chars showed better reactivity on NO reduction, which may be related to smaller average pore diameters, larger BET surface areas and larger pore volumes. The increasing of residence time increased the graphitization degree of all chars, and main reductions of structural defects were from within and between carbon graphene layers. Besides, with the residence time increasing, N-6 and N-5 of R-form Shenmu chars were transformed into N-Q and N-X, while N-X and N-Q (and some N-5) of R-form and H-form sawdust chars were transformed into N-6, which is related to the oxidation or reduction reaction for different chars.

Sorption and leaching behaviors between aged MPs and BPA in water: The role of BPA binding modes within plastic matrix

Due to the hydrophobicity and large specific surface area microplastics (MPs) have become the vector for the migration of environmental organic pollutants. Environmental aging process affects the physiochemical structure of MPs and their corresponding environmental behaviors, in which the effect of bisphenol A (BPA) binding mode within plastic matrix on aging behaviors of MPs is not reported. In this work, the structural properties and BPA sorption behaviors of low density polyethylene (LDPE) MPs with BPA additives and polycarbonate (PC) MPs with BPA monomers exposed to three types of artificial accelerated aging processes including UV/H2O, UV/H2O2, and UV/Cl2 systems were comparatively investigated. Virgin LDPE and PC exhibited obvious leakage of BPA additives or monomers. Aged LDPE had stronger sorption ability towards BPA in water environment with no observed leakage of BPA additives. While, aged PC had extremely high leakage of BPA monomers, which is similar to virgin PCs and was proved to be a persistent source of BPA release. The BPA sorption on aged LDPE or leaching from aged PC was influenced by aging processes, water pH, salinity, co-existing estradiol (E2), and water sources. This study reveals the potential ecological and environmental risks of MPs containing toxic additives/monomers during aging processes from a new perspective.

Influence of water washing treatment on Ulva prolifera-derived biochar properties and sorption characteristics of ofloxacin

The influences of water washing treatment on the properties of Ulva prolifera-derived biochar (U.P-biochar) and its sorption characteristics of ofloxacin (OFL) were investigated. The results showed that the water washing treatment significantly changed the physiochemical structures of U.P-biochars, and improved the sorption capacity of OFL. The sorption capacity of OFL by U.P-biochar was closely dependent on pyrolysis temperature (200–600 °C) and equilibrium solution pH (3–11). Different sorption mechanisms (e.g. cation exchange, electrostatic attraction, H-bond and cationic–π and π–π interactions) were dominant for specific U.P-biochars under various pH regions (acidic, neutral and alkaline). Moreover, the unwashed and washed U.P-biochars prepared at 200 °C (BC200 and BCW200) showed a higher sorption capacity of OFL at pH = 7. The two-compartment first-order model provided an appropriate description of the sorption kinetics of OFL by BC200 and BCW200 (R2 > 0.98), which revealed that the contribution ratios between the fast and slow sorption compartments (ffast/fslow, 1.55 for BC200 and 1.25 for BCW200) reduced after water washing treatment of U.P-biochar. The values of n for the Freundlich model were less than 1, which demonstrated that the sorption of OFL by BC200 and BCW200 was favourable and nonlinear. Also, the sorption of OFL by BC200 and BCW200 increased with an increase in solution temperature and the sorption process was spontaneous and endothermic. This study provides valuable information for being a primary consideration in the production and application of U.P-biochar.

Physiochemical structure of semicoke derived from co‐carbonization of coal and sawdust blends

Physiochemical structure of semicoke derived from co‐carbonization of coal and sawdust blends

A Soil Nematode Community Response to Reclamation of Salinized Abandoned Farmland.

Development from abandoned land to farmland after vegetation reestablishment for reclamation is an important salinization rehabilitation process in dryland ecosystems. While subsequent soil abiotic changes have been reported, few studies have focused on how reclamation affects the soil biota. Understanding the response of soil biota to reclamation is useful for evaluating the effect of agricultural management. We investigated soil physiochemical properties, the composition and structure of nematode communities, and nematode metabolic footprints in control and reclaimed farmland. The results showed that soil properties were significantly altered by reclamation. In particular, reclamation significantly increased pH, organic carbon, total nitrogen, and microbial biomass carbon. Conversely, electrical conductivity was significantly decreased. Shannon and Simpson indices were affected by reclamation. Reclamation significantly increased the Shannon index in the 10-20 cm soil layer. Reclamation significantly increased the Simpson index in the 0-10 cm soil layer, while the opposite was observed in the 10-20 cm soil layer. High basal index and fungal-based channel were found in the control. Total nematode abundance increased due to reclamation, which included fungivores, herbivores, and omnivores-predators. More nematodes could store more biomass carbon in the reclaimed farmland. Reclamation had an effect on the structure and function of soil food web, and increased the metabolic footprints of various trophic groups of nematodes. Nematode faunal analysis revealed that exogenous substances input led to the high level of communities structure, and the soil food web matured in the reclaimed farmland. The nematode communities were affected by reclamation. Furthermore, pH, EC, SOC, TN, and MBC were key driving factors affecting the nematode communities. Therefore, reclamation could effectively enhance the structure and function of soil food web through bottom-up effects in the cotton fields in Xinjiang, China.