ACS Omega
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2020
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IF 2.87
Xuefang Hu,Zhiqing Tian,Xurui Li,Shikui Wang,Haisheng Pei,Hao Sun,Zhimin Zhang
An environmentally friendly approach for the comprehensive utilization of shrimp shell waste was reported. Instant catapult steam explosion (ICSE) was employed for shrimp shell waste pretreatment. After ICSE, lower crystallinity and greater surface areas of shrimp shells were achieved, which significantly enhanced the extraction of chitin. Compared to the traditional method, weaker organic acid (HCOOH) and much lower dosages of KOH (90% molar less) were used, and chitin with a high demineralization rate (98.2%) and deproteinization rate (97.7%) was obtained. The wastewater was neutralized by simply intermixing, and it was recycled as a potential plant fertilizer because it contained more oligopeptides, calcium, and potassium, but it was less salty and therefore non-toxic to plants. The whole process produced less solid waste and no waste water. The obtained chitin also showed a low degree of acetylation (50.5%), which demonstrates the potential for environmentally friendly preparation of chitosan in dilute alkali through ICSE.
研究领域:
生物技术
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环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Ting He,Jixing Zhao,Dongxian Chen,Shuai Gu,Jianguo Yu
The heavy metals in spent lithium-ion batteries (LIBs) are potential safety hazards to the environment. Conventional hydrometallurgical recovery techniques suffer from both economic and environmental challenges. Here, a novel two-step leaching and solvent extraction process are proposed to improve the leaching efficiencies and achieve the integrated leaching of LIBs cathode and anode sheets. The current collector (Al) enables the self-actuated enhanced leaching of the spent cathode sheet, the leaching efficiencies of Al 3+ , Li + , and Co 2+ are 100 %, 71.29 %, and 63.53 %, respectively, under 0.4 M HCl and 40 min without external energy input. With di-(2-ethylhexyl)phosphoric acid (D2EHPA), 98.99 % Al 3+ can be selectively extracted from the leachate. The following electrochemical leaching of both spent cathode residual and spent anode sheet is carried out at low cell voltage, 99.8 % Li +, and 99.69 % Co 2+ can be obtained in 90 min. Meanwhile, Al(OH) 3 , Co(OH) 2 , Li 2 CO 3 , and Cu are obtained from spent cathode and anode sheets with high crystallinity and purity, respectively. This strategy provides novel approaches for the integrated recycling of spent LIBs, thus realizing an environmentally friendly process with more application potential.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
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2024
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IF 4.9
Li Xiaoyan,Fu Jialin,Zhai Shixiong,Wang Jun,Xu Bi,Cai Zaisheng
Cationic modification of cotton fabrics stands as a promising strategy for achieving sustainable production with superior dyeing performance. However, the low utilization of chemical reagents and poor production efficiency in the cationization process trigger its multiple environmental pollution in the late-stage dyeing industry. Herein, we develop an efficient, clean and low-cost cationic modification method of cotton fabrics, which could greatly reduce both the chemical usage (3-chloro-2-hydroxypropyltrimethyl ammonium chloride ((CHPTAC) and NaOH) and overall treatment costs compared to the conventional approaches. The modification is designed to achieve an efficient and competitive cationization effect through a facile one-bath pad-bake process. Under the pressure of the rolls, CHPTAC with low molecular weight diffuses rapidly and flexibly, ensuring even distribution within the fiber for comprehensive cationization. Notably, the as-prepared cationic cotton exhibits higher color depth with only half the dye utilization in traditional methods. Implementing the proposed one-bath pad-bake cationic process results in reductions of 8.3%, 40% and 50% in CHPTAC, NaOH and water usage, respectively, while a 96% decrease in processing time compared to conventional exhaust method. This novel and efficient approach holds great promise to be widely used in practical application of cationic modification in textile and coloration industry.
研究领域:
纺织科学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Yu Shao,Xinyi Shen,Lin Lu,Guiping He,Jie Guo,Jiawei Li,Dongming Qi
For cotton fabrics, conventional reactive dyeing in a water bath typically involves substantial consumption of salt, water, and energy, along with the discharge of colored, high-salt wastewater. In this study, we reported a cleaner, shorter process and binder-free pad-cure dyeing technique for cotton fabrics using cationic fluorosilicone-modified polymer/pigment (FSi-Polymer/Pigment) hybrid latexes with less water and energy consumption. It was revealed that, compared with binder-pigment color paste pad dyeing, the higher affinity and color depth (3 times higher), higher rubbing fastness (grades 4–5) and washing fastness (grade 4) of binder-free dyed cotton fabrics were significantly improved, and the breathability and softness were closer to that of the original cotton fabric. More importantly, FSi-Polymer/Pigment hybrid latexes had good color regulation and matching properties, and the dyed cotton exhibited high antifouling and ultraviolet protection performances. Compared with conventional reactive pad dyeing, this process significantly reduced water consumption and carbon dioxide emissions decreasing by 99.9 % and 71.2 %, respectively, which facilitated the low-carbon advancement of cash crops and products within the printing and dyeing sector. In summary, this dyeing technology offers significant economic and environmental benefits, which hold promising application prospects in the cotton dyeing industry.
研究领域:
纺织科学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
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2022
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IF 11.211
Yangyang Wang,Wenjing Duan,Rujie Li,Fan Zhang,Shichao Tian,Zhongqi Ren,Zhiyong Zhou
The novel heteropolyacid ionic liquid 1-methylimidazolium silicotungstate ([Mmim] 4 SiW 12 O 40 ) was synthesized using a one-step method and subsequently characterized. This compound was then employed as a co-extractant for the removal of lithium from salt lake brine having a high Mg/Li molar ratio , in conjunction with tributyl phosphate (TBP) and γ-heptanolide as the extractant and diluent, respectively. The optimal extraction conditions gave a single-stage lithium ion extraction efficiency of approximately 60 %. More environmentally friendly and efficient processes were also developed. In one approach, a portion of the aqueous phase containing only HCl and LiCl after stripping was used for washing along with an aqueous HCl solution as the stripping agent and Mg(OH) 2 for regeneration. In the alternative method, NaCl and LiCl were used as washing agents while Na 2 CO 3 was employed for stripping and regeneration, reducing the time required without the need for strong acids or bases. This system showed good extraction efficiency stability over 10 consecutive cycles. The mechanism of this process was explored using Fourier transform infrared spectroscopy and 31 P nuclear magnetic resonance spectroscopy and the binding capacity of TBP for the metals was found to decrease in the order of Li + > Na + > Mg 2+ > K + .
研究领域:
化学
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材料科学
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环境科学
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分析化学
✓ 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）