Results 1 to 10 of about 1,851 (82)

燃煤电厂脱硫废水处理技术现状与发展

open access: yesGongye shui chuli, 2023
在分析脱硫废水水质特点,以及调研排污许可证中脱硫废水去向和污染物排放执行标准的基础上,论述了脱硫废水达标处理、厂内回用和零排放的技术路线。排污许可证基本不允许脱硫废水外排,并对脱硫废水车间排放口水质进行了严格限定。约80.0%电厂的污染物因子和限值按《火电厂石灰石-石膏湿法脱硫废水水质控制指标》(DL/T 997—2006)执行,部分电厂增加了氨氮污染物因子控制指标、下调了氟化物和COD限值。脱硫废水达标处理,一类污染物重金属主要采用化学沉淀法去除,二类污染物氟化物采用复合盐沉淀技术去除 ...
胡大龙   +5 more
doaj   +2 more sources

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

A heavy haze episode in Hangzhou city in the winter of 2017: Characteristics of PM2.5 water-soluble components, causes and origins(杭州市2017 年冬季一次重灰霾过程中PM2.5水溶性离子特征、来源及成因分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2019
利用在线监测仪测量了杭州市一次重灰霾过程(2017年12月29日至2018年1月3日) 中PM2.5主要水溶性离子(Cl- 、SO42- 、NO3- 、NH4+ 、Na+ 、Ga2+ 、Mg2+) 及主要气态污染物(SO2、NO2、O3、NO、CO、 HCl、NH3、HNO2、HNO3) 的小时浓度。结合混合受体模型和国控监测分析,研究了2017 年12 月30-31 日重灰霾事件的污染特征、来源和成因。研究结果表明:PM2.5 浓度高达318 μg·m-3; NO3-/SO42-最大值为2.68 ...
WANGPeng(汪鹏)   +8 more
doaj   +1 more source

城市地表径流污染及其全过程削减

open access: yesShuitu Baochi Xuebao, 2004
城市地表径流是影响城市水环境质量的第二大污染源,也是仅次于农业面源污染的第二大非点源污染源。随着城市工业废水和生活污水等点源治理力度的加大,城市地表径流污染问题将越来越突出。本文系统地阐述了城市地表径流污染产生的过程、污染特征、影响因素、污染物类型及其来源,并从径流量、污染物和径流总量等3个层面,以及从污染物产前、产中以及产后等3个环节全方位地探讨了城市径流污染的削减对策与措施。
陈玉成 李章平 李章成 许红艳
doaj   +2 more sources

Primary research of Hg2+ reduction and stabilization in wet flue gas desulfurization liquors(烟气脱硫液中Hg2+还原及稳定化初探)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2010
针对烟气脱硫液中Hg2+易被还原并再释放进入大气,造成二次污染的特点,研究脱硫液中汞离子的还原释放机制以及稳定化的方法.对于前者,考察了pH、、Ca2+和Mg2+等因素对Hg2+还原速率的影响;对于后者,主要采用螯合沉淀法,通过实验对比了TMT和DTCR两种金属离子捕捉剂的性能.通过本研究,可以有效解决Hg2+在脱硫液中的还原释放及二次污染问题,并为湿法脱硫同时脱汞的工业应用提供理论依据.
CHENGXiao-ya(成潇雅)   +5 more
doaj   +1 more source

A Multifunctional MXene/CNF/PVB Fabric via Layer‐by‐Layer Construction for Electromagnetic Interference Shielding, Joule Heating, and Infrared Stealth

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT The rapid advancement of 5G communication technology has intensified electromagnetic pollution, creating an urgent demand for flexible multifunctional fabrics with efficient electromagnetic interference (EMI) shielding performance. This study proposes a novel material‐stacked construction strategy to fabricate multifunctional MXene/cellulose ...
Zong‐Kai Yan   +9 more
wiley   +1 more source

Ultrafast Catalytic Decomposition Reaction Using a ZIF‐67@Cellulose Nanofiber Composite‐Based Cobalt/ Nitrogen Co‐Doped Nanoporous Carbon for Water Treatment

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Recently, cobalt/nitrogen co‐doped materials have emerged as heterogeneous catalysts to activate peroxymonosulfate (PMS) and have been applied to advanced oxidation processes for environmental remediation. However, their recyclability and reusability remain major barriers to practical application.
Wen‐Kai Zhu   +11 more
wiley   +1 more source

Municipal risk communication challenges in the Nordic context: Organizing risk ownership 北欧情境下的城市风险传播挑战:组织风险所有权 Desafíos de la comunicación de riesgos municipales en el contexto nórdico: Organizar la propiedad del riesgo

open access: yesRisk, Hazards &Crisis in Public Policy, Volume 16, Issue 1, March 2025.
Abstract At a time when disasters, pandemics, pollution, and other crises gain prominence, local governments bear a crucial responsibility for effective risk communication. Yet, there remains a gap in our understanding of how municipalities approach risk communication before a crisis occurs.
Hogne L. Sataøen   +3 more
wiley   +1 more source

难降解有机废水的高效优势菌的研究进展

open access: yesGongye shui chuli, 2005
难降解有机废水对环境造成了严重的污染,利用高效优势菌处理难降解有机废水具有效率高、成本低、无二次污染的优点。作者综述了高效优势菌的分类和在各类难降解废水中的应用,以及高效混合菌培育技术的研究进展。
陈华, 严莲荷, 王瑛, 周申范
doaj   +2 more sources

Barriers to the safe preservation of the traditional herbal practice in Ghana 加纳传统草药实践的安全保存所遭遇的障碍 Barreras para la preservación segura de la práctica herbaria tradicional en Gana

open access: yesWorld Medical &Health Policy, Volume 16, Issue 3, Page 506-513, September 2024.
Abstract The preservation of the culturally important traditional herbal medicine practice in Ghana is threatened by the growth of allopathic medicine. It is argued that two main factors comprise this threat: significant safety concerns over many traditional herbal preparations, and a conflict in therapeutic frameworks which provides a substrate for ...
Benjamin Clay
wiley   +1 more source

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