CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Qiang Liu,Bingsi Liu,Qinze Liu,Qiuyue Zhang,Rongnian Xu,Xuanyue Wu,Hong Xia
Refined design of sustainable sorbent demands to tackle the strong dependence for additional mesoporous support and low utilization in hot coal gas desulfurization. Unlike the well-established preparation of loading sorbents supported on zeolites, a vacuum-assisted self-assemble strategy tapping into the ordered channels of walnut wood is proposed to facilely fabricate three-dimensional (3D) (a%Ce–Mn) y Al 2−y O x desulfurizers with anisotropy which provides a desirable macroporosity for rapid diffusion of H 2 S. Benefiting from the inherent straight channle in micron scale, the obtained (8%Ce–Mn) 1.5 Al 0.5 O x presents the highest breakthrough sulfur capacity (289.79 mg g −1 ) and effective utilization (88.42%) at 700 °C. The favorable rapid diffusion of gases in micro/macropores improves greatly the H 2 O-resistance and anti-interference ability of 3D (8%Ce–Mn) 1.5 Al 0.5 O x for high steam and concentration of reducing gas. The fast mass transport in sulfidation reaction at 700 °C is described perfectly by the improved deactivation kinetics model. This study opens a novel design of the ideal 3D desulfurizers with micron porosity inherited from hierarchical architecture of walnut wood for industrialization utilization in the near future.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Xiaodong Yang,Lili Wang,Xueqin Shao,Jin Tong,Rui Chen,Qiang Yang,Xizhen Yang,Guodong Li,Andrew R. Zimmerman,Bin Gao
Biosorbent has attracted considerable attention recently for use in environment remediation and pollution control. Here, a simple and efficient method of one-step alkaline ball milling was designed to prepare porous hickory biosorbent without any thermal treatments. The products were characterized for their ability to remove methyl violet (MV) and titan yellow (TY) organic dyes from aqueous solutions. The one-step alkaline ball milled hickory (OABMH) biosorbent exhibited mesoporous microstructure, homogeneous morphology, and a diversity of oxygen-containing functional groups. Furthermore, OABMH could sorb 212.2 mg g −1 MV and 5.6 mg g −1 TY polar dyes, respectively, mainly through the surface complexation mechanism. Freundlich adsorption isotherm and intraparticle diffusion kinetic models best described MV adsorption by OABMH biosorbents. The results indicate that one-step alkaline ball milling technique is an efficient and economical approach for converting biomass into advanced biosorbents for environment remediation and water treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xilei Yin,Yuanlong Guo,Wene Zhang,Xinjie shen,Hu Cai,Gu Guo,Xuejun Pan,Haibo Xie
Due to the superior nutrient management and biodegradation properties, the biodegradable slow-release fertilizer shows a greater market prospect and environmental protection significance in the chemical fertilizer industry. In this study, a new kind of full bio-based slow-release fertilizers (B-SRFs) encapsulated by walnut wood-based lignocellulose-grafted with poly(ε-caprolactone) (WWL- g -PCL) in the presence of urea was prepared. Considering the multi-hydroxyl structural feature of walnut wood-based lignocellulose , WWL- g -PCLs were synthesized successfully through the ring-opening graft polymerization reaction (ROP) of walnut wood and ε-caprolactone in DBU/DMSO/CO 2 solvent system without adding additional catalyst. The structural and thermal characteristics of WWL- g -PCLs were thoroughly elucidated by nuclear magnetic resonance (NMR), fourier transform infrared spectroscopy (FT-IR), differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). The results indicated that the WWL- g -PCLs exhibited favorable thermal properties with adjustable glass transition temperature (T g ) from 20.8 to 29.3 °C compared with walnut wood-based lignocellulose, which was beneficial for melt extrusion and granulation to produce B-SRFs. Scanning electron microscope (SEM), static release in water, and tomato fertilization efficiency experiments were conducted to delve into the slow-release mechanism and assess practical application effects. Subsequently, the outstanding slow-release performance of B-SRFs was observed for cumulative nutrient releases of 48–72% within 5 h in water and agreed with the Korsmeyer-Peppas model, indicating its excellent slow-release property. Furthermore, the formulated B-SRFs demonstrated a substantial increase in tomato cumulative biomass, yield, soil organic matter , and fertilizer utilization. Notably, there was a remarkable 57.8% increase in the cumulative biomass of tomatoes. These findings underscore the potential of walnut wood derivatives in developing effective and environmentally friendly slow-release fertilizers with promising agricultural applications.
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuang Jia,Zhijie Mao,Bo Zhang,Yaru Wang,Tianyang Sun,Guanhua Jin,Chuang Wang,Yichen Lv,Shouzhu Li,Dan Sun
Hierarchical porous activated carbon (WXAC) was synthesized from walnut xylem. Precarbonization first preserved the vascular bundle structure, followed by controlled KOH activation-etching to precisely develop the porous architecture. Systematic characterization (BET, XRD, SEM, XPS, FTIR) confirmed a 3D interconnected microtubular structure with ultrahigh surface area (3116 m 2 /g) and pore volume (1.69 cm 3 /g). This hierarchical architecture combines microporous dominance with meso/macropore synergism, while oxygen enrichment (11.6 %) and abundant functional groups enhance methylene blue (MB) adsorption. WXAC achieves exceptional adsorption capacity (1015.29 mg/g) with rapid initial kinetics (125.8 mg/(g·min) within 5 min. Over 75 % removal efficiency persists through three regeneration cycles. Mechanistic investigations identified synergistic adsorption pathways combining hydrogen bonding, electrostatic interactions, π-π stacking, and pore confinement. Furthermore, the adsorption process follows pseudo-second-order kinetic and Redlich-Peterson isotherm models, suggesting the coexistence of monolayer and multilayer adsorption mechanisms. Thermodynamic parameters confirm spontaneous endothermic behavior. This work transforms agroforestry waste into high-performance adsorbents through controlled pore engineering.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）