CHEMOSPHERE
·
2017
·
IF 4.208
Shun Yang,Yaru Wang,Shiting Lin,Jie Fan,Chang Liu,Xiao Yan
Polymeric absorbents were surface-engineered with photocatalysts for simultaneous adsorption and degradation of organic wastes in water using a facile Pickering emulsion polymerization method. This facile strategy not only overcome the low light energy utilization of traditional photocatalysts-polymer nanocomposites due to the core-shell structure, but also could convenient control the microstructure of the photocatalysts owing to the separated preparation procedure when compared to the direct growth method. Firstly, binary bismuth oxyhalide composed as BiOI 0.5 Cl 0.5 was chosen to engineered polymeric absorbents due to its higher photodegradation efficiency especially. After the emulsification and polymerization process, BiOI 0.5 Cl 0.5 acting as the stabilizer would be fixed on the surface of the functional polymeric absorbents to form PA@BiOI 0.5 Cl 0.5 . Batch experiments were lunched using phenol as the test substance, the results shown that PA@BiOI 0.5 Cl 0.5 could remove phenol completely within a short time and could be reused without any treatments with a simultaneous adsorption and degradation process. Furthermore, polymeric absorbents were engineered with commercial TiO 2 to prove the generality of this strategy.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Ping Zhang,Yue Cai,Lingjie Zhang,Yuting Mao,Mingxue Xiang,Zhongbang Zhu,Youqin Zou
Selective removal of metal ions , especially lead (Pb 2+ ), is of enormous importance for environmental protection. A major challenge is to rational design capture agent for Pb 2+ with high efficiency and excellent selectivity . Here we recycled the organic layered wastes to prepare a novel sulfate-loaded flower-like layered double oxide (S-FLDO) via precursor-calcination method, which exhibited preeminent selective ability toward Pb 2+ removal than the other coexisting metal ions (Cu 2+ , Ni 2+ , Co 2+ and Cd 2+ ). The isotherm and kinetic results unveiled that the immense capacity of Pb 2+ was up to 869.57 mg g −1 at 318 K, with the rapid decrease of the residue Pb 2+ concentration from mg·L −1 levels to trace levels (≤1 μg·L −1 ) limited in 30 min. More importantly, the exceptional removal of Pb 2+ could maintain in a wide pH range and even in the authentic water matrices. The mechanism for Pb 2+ removal was strongly associated with sulfate functional group via the formation of Pb-sulfate precipitation benefited by ion-exchange interaction. The alkaline environment resulted from LDO hydration further enhanced the removal process. In addition, the S-FLDO could maintain the high removal efficiency in real water as well as exhibited excellent recycle performance. This work provides a high value-added sulfate-loaded agent derived from organic layered wastes for superior selective lead removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Agronomy-Basel
·
2021
·Vol. 11
·期 6
·1175
·
IF 3.417
Corinna Schröder,Franziska Häfner,Oliver Christopher Larsen,Ariane Krause
A transformation towards sustainable food production requires improved circular nutrient management. Urban organic waste contains relevant nutrients and organic matter, yet only 4% of global urban nitrogen (N) and phosphorus (P) sources are presently recycled. One recycling approach is the composting of urban wastes for urban horticulture. We characterized compost from various urban waste fractions and assessed their fertilizer value in a pot trial with lettuce plants. Seven treatments were investigated: food waste vermicompost with coir and paperboard bedding material, thermophilic compost from green waste and human feces, two references with mineral fertilization and a sand control. The lettuce yield and total uptake of P, potassium (K), calcium (Ca), and magnesium (Mg) were highest in plants grown in coir-based vermicompost. The fecal compost led to the highest shoot P and K content, but the shoot uptake of Ca and Mg were lower than in the other treatments. All composts required additional N for lettuce growth. In conclusion, urban waste-derived vermicompost and fecal compost demonstrate a high delivery rate of plant-available Ca, Mg, P, and K. Research is needed on macronutrient availability and alternative N sources for the substitution of synthetic fertilization. These findings support the production of urban waste composts, furthering efforts in nutrient recycling.Keywords:coconut fiber;fecal compost;lettuce;nutrient recovery;organic waste;sustainable food production;thermophilic compost;phosphorus
研究领域:
环境科学
·
农业科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2024
·Vol. 46
·期 9
·1-17
·
IF 3.2
Zhong Bin,Xie Hanyi,Pan Tao,Su Buli,Xu Weijun,Wu Zhenqiang
Highly acidic citrus pomace (CP) is a byproduct of Pericarpium Citri Reticulatae production and causes significant environmental damage. In this study, a newly isolated acid-tolerant strain of Serratia sp. JS-043 was used to treat CP and evaluate the effect of reduced acid citrus pomace (RACP) in passivating heavy metals. The results showed that biological treatment could remove 97.56% of citric acid in CP, the organic matter in the soil increased by 202.60% and the catalase activity in the soil increased from 0 to 0.117 U g −1 . Adding RACP into soil can increase the stabilization of Cu, Zn, As, Co, and Pb. Specifically, through the metabolism of strain JS-043, RACP was also involved in the stabilization of Zn and Pb, and Residual Fraction in the total pool of these metals increased by 10.73% and 10.54%, respectively. Finally, the genome sequence of Serratia sp. JS-043 was completed, and the genetic basis of its acid-resistant and acid-reducing characteristics was preliminarily revealed. JS-043 also contains many genes encoding proteins associated with heavy metal ion tolerance and transport. These findings suggest that JS-043 may be a high-potential strain to improve the quality of acidic organic wastes that can then be useful for soil bioremediation. Graphical Abstract
研究领域:
环境科学
·
微生物学
·
生物技术
·
土壤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Muxiang Liang,Xiaohai Qin,Qi Chang,Chen Wang,Gang Guo,Xiejuan Lu,Xiaohui Wu,Feixiang Zan
The contribution of inoculum-to-substrate ratios (ISRs) and conductive materials (CMs) on the productivity of anaerobic digestion (AD) remains unclear, particularly for protein-rich organic waste. This study investigated whether the addition of CMs, i.e., biochar and iron powder, can overcome the limitations imposed by varying ISRs for the AD of protein as the sole substrate. Results indicate the ISR plays a decisive role in hydrolysis, acidification, and methanogenesis for protein conversion, irrespective of CMs addition. Methane production increased stepwise as the ISR escalated to 3:1. The addition of CMs provided limited improvement, and iron powder even inhibited methanogenesis at a low ISR. Bacterial community variations were contingent on the ISR, while iron powder supplementation significantly elevates the proportion of hydrogenotrophic methanogen. This study demonstrates that the addition of CMs could affect methanogenic efficiency but can not overcome the limitation of ISRs for the AD of protein.
研究领域:
环境工程
·
废物管理
·
微生物学
✓ 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）