Results 11 to 20 of about 6,258 (101)

基于复合钝化剂施用植物轮作模式对农田土壤Cd和As污染的修复

open access: yesShuitu Baochi Xuebao, 2022
镉(Cd)和砷(As)是土壤环境中广泛存在的重金属污染物,具有不可降解性和生物累积性的特点,应及时开展Cd和As污染的修复工作。研究以湖南中、轻度Cd和As污染农田土壤为对象,选取当地优势植物。通过田间试验,添加生物炭与纳米零价铁的复合钝化剂,利用不同植物(油菜-蚕豆、玉米-苎麻)配套种植模式,探讨基于复合钝化剂施用植物轮作模式对土壤中Cd和As污染的修复效果。结果表明:(1)间作种植模式(蚕豆-油菜、玉米-苎麻)更有利于土壤中Cd和As的固定,试验土壤中Cd和As的最佳固定效果依次为原供试土壤的45 ...
张红娟   +4 more
doaj  

香薷植物修复铜污染土壤的研究进展

open access: yesShuitu Baochi Xuebao, 2005
土壤铜污染有自然来源和人为来源。铜污染土壤中有机质、Fe/Al氧化物对铜的专性吸附,是影响土壤中铜生物有效性的主要因素。近年来,我国原生植物修复材料如海州香薷、鸭跖草、酸模、紫花香薷在国内铜污染土壤的研究中得到广泛应用。其中.采用海州香薷开展铜污染土壤植物修复机理和修复技术的研究,已从实验室水培、盆栽试验的生长反应特性、耐及解铜毒的生理生化反应,进展到室外大田修复的示范工程及技术推广阶段。紫花香薷在重金属复合污染土壤上,也有修复前景。开展植物修复材料的产后处置研究,综合利用和深加工,增大植物修复材料价值,
彭红云 杨肖娥
doaj   +2 more sources

A study on the absorption of cadmium and zinc in the water sediments with submerged plants(沉水植物对受重金属镉、锌污染的水体底泥的修复效果)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2016
为了探究常见沉水植物对水体底泥中重金属污染的富集效果,选取浙江水域较为常见的3种沉水植物苦草(Vallisneria natans (Lour.) Hara)、黑藻(Hydrilla verticillata (Linn. f.) Royle)、金鱼藻(Ceratophyllum demersum L.),在模拟天然水体环境中,将3种沉水植物培养在含有重金属Cd、Zn的底泥中生长一个生活周期.依据沉水植物对重金属Cd、Zn的富集量和生物-沉积物生物富集因子(biota-sediment ...
QIAOYunlei(乔云蕾)   +4 more
doaj   +1 more source

含铬污水的生物修复技术研究现状及展望

open access: yesGongye shui chuli, 2022
六价铬被广泛应用于工业生产。含铬污水排入环境,在污染周边水源和土壤的同时,还可通过生物富集和生物放大作用威胁人类健康,因此高效处理含铬污水是世界环境科学领域亟待解决的问题。传统的铬修复技术一般采用物理化学处理方法,但其具有处理程序复杂、成本较高、效率低、容易导致二次污染等缺点。生物修复技术则利用植物、动物和微生物,通过吸收、降解、转化等途径减少污水中的铬,具有经济、无二次污染、修复效率高、过程安全等优点,因此被认为是处理含铬污水的资源节约型、环境友好型技术。就微生物还原,微生物吸附,植物 ...
安秋颖   +4 more
doaj   +2 more sources

3种植物-人工湿地对铀尾矿库浸渍水修复效果比较

open access: yesGongye shui chuli, 2022
铀尾矿库浸渍水是核工业发展过程中产生铀浓度较高的工业废水,以芦苇-人工湿地(CW)、香蒲-CW、菖蒲-CW为试验组,以无植物-CW为对照组,比较研究了不同植物-CW修复铀尾矿库浸渍水的效果。结果表明,水力停留时间为36 h,经过5次循环后,3个试验组中的植物生长均未受到明显的抑制作用,各级植物-CW出水铀质量浓度均低于50 µg/L,达到国家排放标准(GB 23727—2020),不同植物对铀的修复效果从高到低依次为香蒲>菖蒲>芦苇,3种植物对铀的富集系数(BCF)分别为47.16、44 ...
丁德馨   +6 more
doaj   +2 more sources

植物护坡及其生态效应研究

open access: yesShuitu Baochi Xuebao, 2007
河道生态系统中的河岸侵蚀和滨水缓冲带建设倍受关注。以上海市浦东新区机场镇的生态河道示范工程为例,探讨了以生态修复和稳定坡岸为目标的植物护坡技术在生态河道坡岸修复中的应用及其生态效应。在不同河段分别采用了全系列生态护坡、土壤生物工程护坡和复合式生物稳定等3类植物护坡技术。通过对工程实施后3a(2004年~2006年)来的生态监测发现,护坡植物生长良好,新生枝叶和根系的护坡作用明显,土壤抗剪强度明显增加,河岸土壤侵蚀得到有效控制,坡岸的结构稳定性增强;同时河岸生境得到改善,本地植物快速恢复,生物多样性增加 ...
赵广琦   +4 more
doaj   +2 more sources

Spatiotemporally Adaptive Bilayer Silk Fibroin–Polyvinyl Alcohol–Metformin Composite Coating on Biodegradable Zinc for Orthopedic Applications

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Biodegradable zinc (Zn)‐based materials are considered promising candidates for orthopedic applications because of their favorable mechanical properties, controllable biodegradability, and good biosafety profiles. However, their clinical translation is limited by early‐stage corrosion‐induced cytotoxicity and inflammation, as well as ...
Jinlong Mao   +9 more
wiley   +1 more source

Targeting Inflammaging: A Metformin‐Releasing Titanium Implant Reprograms Senescent Macrophages to Orchestrate Angiogenesis and Osteogenesis

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Bone defect repair in elderly patients is frequently compromised by reduced osteogenic capacity and delayed healing. Chronic inflammation‐driven inflammaging is a critical contributor to this impairment, characterized by dysfunctional autophagy in senescent macrophages (S‐MΦs), excessive reactive oxygen species (ROS) accumulation, and ...
Ruiyue Hang   +6 more
wiley   +1 more source

3D Printed High‐Strength Hydrogel for Dual Release of Cu2+ and Ag+ Ions to Enhance Bone Repair and Antibacterial Properties

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT Bone restoration is often hindered by the spatiotemporal dysregulation of immune and regenerative signals. Conventional bio‐inert implants, providing only passive support, fail to modulate this microenvironment, leading to infections and poor healing.
Zhizhong Sun   +8 more
wiley   +1 more source

Titanium Implant Abutments With Polydopamine‐Mesoporous Cerium Dioxide Coatings for Enhanced Antibacterial, Anti‐Inflammatory, and Soft Tissue Integration Properties

open access: yesRare Metals, Volume 45, Issue 6, June 2026.
ABSTRACT The poor soft tissue integration around titanium implants creates a microgap that serves as a pathway for pathogen invasion, resulting in infection, inflammation, and the progression of peri‐implantitis. As the implant’s transmucosal component, the abutment determines the degree of peri‐implant soft tissue attachment.
Xuan Li   +7 more
wiley   +1 more source

Home - About - Disclaimer - Privacy