WATER AIR AND SOIL POLLUTION
·
2016
·Vol. 227
·期 9
·1-11
·
IF 1.551
Wu Hailu,Xu Kaiqin,He Xiaojuan,Wang Xinze
Three macrophyte species, Typha augustifolia ( T. augustifolia ), Phragmites australis ( P. australis ), and Acorus calamus L. ( A. calamus L.), have been grown in hydroponic cultivation systems fed with synthetic wastewater. The experiment was designed as 3 × 2 factorial, with three species and two ratios of NH 4
+ /NO 3
− so as to investigate the nitrogen transformation and nitrogen removal capacity of each species. The nitrogen removal mechanism was further disclosed by comparing biomass production, nitrogen mass balance, and root exudates of the three plant species under different NH 4
+ /NO 3
− ratios. The results indicated there exists a linear relationship, with positive significance ( r = 0.946, p < 0.05), between plant biomass and total nitrogen (TN) removal efficiency; in other words, biomass could best reflect plant ability to remove nitrogen. It is also found that NH 4
+ /NO 3
− ratio could influence plant biomass and root exudates significantly. Additionally, the hydrogen donor and source of energy in denitrification happened in this research were mainly organic acids and soluble sugars, accounting for approximately 50 % of the composition in root exudates.
研究领域:
环境科学
·
植物生理学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
Environmental Pollutants and Bioavailability
·
2025
·
IF 3.2
Biao Liu,Qinghua Ai,Youyang Lai,Meng Li,Zhengpeng Feng,Qian Zhang
Aquatic plants used in lake remediation accumulate heavy metals, turning biomass into waste. Herein, biochar (M-AcBC) derived from metal-laden Acorus calamus was combined with sodium percarbonate (SPC) and UV light to degrade tetracycline (TC). M-AcBC contained dispersed CuO, ZnO, and Fe3O4, exhibited defect structures, higher graphitization, and larger surface area than pristine biochar. Under optimal conditions (1.0 g/L M-AcBC, 0.3 mM SPC, pH 3, 900 µW/cm² UV), 90% TC removal was achieved. During the dark phase (0–40 min), functional groups, persistent radicals, and Fe₃O₄ activated SPC to generate •OH, •O2-, and 1O2. Upon UV irradiation (40–120 min), ZnO produced electron-hole pairs that further formed •OH and •O2-. The system exhibited synergistic effects, good reusability, broad applicability to various antibiotics, and reduced ecotoxicity of intermediates. This work provides a waste-to-resource strategy and new insights into the M-AcBC/SPC/UV system for water treatment.
研究领域:
环境科学
·
水处理
·
高级氧化技术
·
生物炭技术
·
污染物降解
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2013
·Vol. 18
·期 5
·5684-5696
·
IF 2.428
Xin Chao Liu,Li Gang Zhou,Zhi Long Liu,Shu Shan Du
The aim of this research was to determine the chemical composition of the essential oil ofAcorus calamusrhizomes, its insecticidal activity against the booklouse, (Liposcelis bostrychophila) and to isolate any insecticidal constituents from the essential oil. The essential oil ofA. calamusrhizomes was obtained by hydrodistillation and analyzed by GC-FID and GC-MS. A total of 32 components of the essential oil ofA. calamusrhizomes was identified and the principal compounds in the essential oil were determined to be α-asarone (50.09%), (E)-methylisoeugenol (14.01%), and methyleugenol (8.59%), followed by β-asarone (3.51%), α-cedrene (3.09%) and camphor (2.42%). Based on bioactivity-guided fractionation, the three active constituents were isolated from the essential oil and identified as methyleugenol, (E)-methylisoeugenol and α-asarone. The essential oil exhibited contact toxicity againstL. bostrychophilawith an LD50value of 100.21 µg/cm2while three constituent compounds, α-asarone, methyleugenol, and (E)-methylisoeugenol had LD50values of 125.73 µg/cm2, 103.22 µg/cm2and 55.32 µg/cm2, respectively. Methyleugenol and (E)-methylisoeugenol possessed fumigant toxicity againstL. bostrychophilaadults with LC50values of 92.21 μg/L air and 143.43 μg/L air, respectively, while the crude essential oil showed an LC50value of 392.13 μg/L air. The results indicate that the essential oil ofA. calamusrhizomes and its constituent compounds have potential for development into natural fumigants/insecticides for control of the booklice.Keywords:Acorus calamus;Liposcelis bostrychophila;fumigant;contact toxicity;essential oil composition
研究领域:
植物学
·
昆虫学
·
天然产物化学
✓ 已验证
DOI
高影响因子
Sustainability
·
2021
·Vol. 13
·期 1
·434
·
IF 3.251
Kunlun Wang,Qian Hu,Yumin Wei,Hui Yin,Changhong Sun,Guizhong Liu
The emergent plants may differ in their capacity to assimilate nutrients from eutrophic water bodies, so the utilization of suitable emergent plants is the key part for successful restoration of shallow eutrophic lakes and rivers. This research applied the depletion method to study the kinetics of uptake of nutrient (H2PO4−,NH4+,NO3−) in different nutrient stresses by the five emergent aquatic plants (Acorus calamusL.,Typha orientalis, Lythrum salicariaL.,Sagittaria trifoliaL.,Alisma plantago-aquaticaLinn) in the riverine zones of Dashi River (39°30′–39°40′ N, 115°59′–116°5′ E), a shallow eutrophic river located in Fangshan District, Beijing. The results showed that at the three phosphorus levels,A. calamusandA. plantago-aquaticahad the highest maximum uptake rate values forNH4+under low to moderate phosphorus conditions, and high phosphorus, respectively.T. orientalishad the highest maximum uptake rate values forNO3−at all phosphorus concentrations, while the Michaelis-Menten constant values ofL. salicariaandA. plantago-aquaticawere smaller. At the three nitrogen levels, the maximum uptake rate values forH2PO4−were the greatest forA. plantago-aquaticaat the low to moderate nitrogen levels andL. salicariaat high levels. Meanwhile,T. orientalisandL. salicariahad the smallest Michaelis-Menten constant values. In this study, nitrogen microbial transformations, such as nitrification, denitrification and their coupling were not measured and their role in measuring kinetics was not assessed. Thus, achieved results shall be considered as a synthesis of several processes mediated by plants, a theoretical guidance to the selection of plant species for phytoremediation of polluted water bodies with different nutrient stresses for quality improvement around the diverse rivers in Haihe River basin.Keywords:emergent plants;eutrophication;nitrogen;phosphorus;uptake kinetics;stress
研究领域:
生态学
·
环境科学
✓ 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）