Results 11 to 20 of about 365 (86)

新形势下我国工业园区水污染减排机制的构建研究

open access: yesGongye shui chuli, 2017
对海河和太湖流域200余家工业园区的水污染防治政策和管理现状进行了调查,分析了园区污染减排管理中存在的问题,提出了构建以工业园区为管理对象、以污染物减排为管理目标的区域化、系统化、规范化、可持续的水污染减排机制,并对新形势下工业园区水污染减排机制的定位、总体构架和构建思路给出了建议。
钟玲   +5 more
doaj   +2 more sources

Identification, spatial distribution, and associated factors of urban protected areas in China

open access: yesConservation Biology, Volume 38, Issue 6, December 2024.
Abstract The increasing proximity between protected areas (PAs) and urban areas, which can lead to urban protected areas (UPAs), is now commonplace. Use of Euclidean distance to measure the distance between PAs and cities has not correctly portrayed the spatial relationship between PAs and cities.
Zuo Zitong, Wang Shuyi, Zhong Le
wiley   +1 more source

Extraction of Chlorophyll from Watermelon Peel(西瓜皮中叶绿素提取工艺的研究) [PDF]

open access: yesShipin kexue jishu xuebao, 2018
Watermelon peel accounts about 30% of the total weight of the fruit, which is a byproduct of the processing of watermelon. The chlorophyll of the peel was extracted via the solvent extraction method and ultra high pressure assisted solvent extraction ...
SHI Yue(时月)   +5 more
doaj   +1 more source

Expert assessment of illegal collecting impacts on Venus flytraps and priorities for research on illegal trade

open access: yesConservation Biology, Volume 38, Issue 5, October 2024.
Abstract Illegal collecting of wild Venus flytraps (Dionaea muscipula) for the horticultural trade represents a persistent threat to populations of the species across their endemic range in the coastal plain of North and South Carolina (United States). Although wild collecting of Venus flytraps is not a novel threat, there has been very little research
Jared D. Margulies   +10 more
wiley   +1 more source

Rubber plantation size and global rubber price are linked to forest loss and degradation in Jambi, Sumatra 印度尼西亚苏门答腊占碑省的森林丧失和退化与橡胶种植园的面积和全球天然橡胶价格有关 Luas perkebunan karet dan harga karet dunia menjadi penyebab degradasi hutan alam di Jambi, Sumatra

open access: yesIntegrative Conservation, Volume 3, Issue 1, Page 22-35, March 2024.
Rubber plantations that are larger in size and remotely located have a higher probability of being linked to forest loss and degradation. The global rubber price can act as a significant driver of both deforestation and degradation. Identifying high‐risk plantations and mitigating associated threats could help curb future forest loss due to rubber ...
H. Manjari Jayathilake   +4 more
wiley   +1 more source

生物铁强化活性污泥法处理不同性质企业联片废水

open access: yesGongye shui chuli, 2006
江南某城镇工业园区集中了众多的医药、化工、磁性材料、染料、电镀等企业。这些企业所用的原料不同,生产工艺不同,产生的废水也不同。其中很多是高污染难处理的废水。该工业园区推行了一套先由企业进行一级预处理,然后进入联片污水厂集中处理的管理模式,采用先进的A/O2(生物铁强化活性污泥法+生物接触氧化法)的废水处理工艺,该处理系统经一年多的运行表明,COD、BOD、NH3-N的去除率高,出水达到GB 8978-1996《污水综合排放标准》一级标准,为工业园区联片废水处理探索了一条新路。
王方园, 盛贻林
doaj   +2 more sources

石油化工园区污水治理技术与对策研究

open access: yesGongye shui chuli, 2023
石油化工园区产业结构的多元化及产排污的非规律性导致其污水成分复杂且水质水量波动大,加之日趋严格的排放限制以及对废水回用及资源化的要求,使得污水处理成为园区普遍面临的环保压力。基于对石油化工行业污水特征和全流程处理技术的认知,突出强调了源头管控对污水处理系统正常运行的重要性,识别了需要重点管控的污染物并提出了纳管指标建议值和污水预处理方法,之后对在此基础上进行的园区集中处理进行了阐述。此外,对湿式氧化、臭氧催化氧化、生物脱氮等典型处理技术和应用案例进行了分析总结,对未来污水处理由“去除”向“回收 ...
王雪清, 郭宏山, 邢心语
doaj   +2 more sources

Pollution characteristics of PM2.5 in Taizhou, Zhejiang Province(台州市不同功能区环境空气PM2.5的污染特征研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2017
2015年7月至2016年3月在台州市采集504个PM2.5样品,利用电感耦合等离子体发射光谱仪和原子荧光光度计分析样品中的19种无机元素,利用离子色谱和热光碳分析仪分别分析8种水溶性离子和2种碳组分有机碳(OC)和元素碳(EC)的质量分数,研究不同功能区环境空气PM2.5及其化学组分的污染特征.结果表明,台州市环境空气PM2.5年均质量浓度为(45.3±20.1) µg • m-3,季节变化规律为冬季>春季>秋季>夏季,空间变化规律为工业园区>商住区>自然保护区.19种无机元素占PM2.5总量的9 ...
TAOZhihua(陶志华)   +8 more
doaj   +1 more source

面向化工园区有害气体泄漏的博弈巡逻策略

open access: yes智能科学与技术学报, 2023
在推进智慧城市一体化的背景下,智慧化工园区的建设步伐正在逐步加快。近些年,我国化工行业事故频发,给公共安全造成了巨大的破坏与损失。因此,如何提升化工园区安全管理和应急响应能力是目前亟待解决的问题。针对该类安全问题,提出面向化工园区有害气体泄漏的博弈巡逻策略。首先,利用对流扩散模型对有害气体泄漏的过程进行描述。其次,引入博弈论对巡逻问题中攻防双方的对抗过程进行建模,将防守者对安全事故的响应时间与其收益关联。然后,提出基于多线性规划的GGC算法,对该博弈模型进行求解。最后 ...
陈茵, 张立泽, 帅国华, 陈黎丽, 王震
doaj   +1 more source

滨海工业园区初期雨水MBBR工艺预处理研究

open access: yesGongye shui chuli, 2021
针对沿海工业园区初期雨水含盐量较高,不利于常规生化及难以快速启动的问题,开展改性MBBR填料制备、盐度梯级驯化的研究。研究表明,采用盐度梯级驯化的反应器MBBR稳定运行在第13天完成,比其他挂膜方式快8~10 d。16S rDNA的焦磷酸测序表明R3中球衣菌属高度丰富。因此,盐度梯级驯化是高盐雨水快速启动的有希望的替代方法,使整个系统具有耐冲击、耐盐、启动快等特点,有效降低临港工业园区人工湿地冲击负荷风险。
王娜, 张军港, 姚晓然, 丁晔
doaj   +2 more sources

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