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321.
Wu Boran Dai Xiaohu Chai Xiaoli 《Environmental science and pollution research international》2017,24(19):16263-16275
Environmental Science and Pollution Research - The production of sewage sludge with the presence of various contaminants has been a serious issue for the operation of wastewater treatment plants on... 相似文献
322.
Cui Guangyu Lü Fan Zhang Hua Chai Honghui He Pinjing 《Journal of Material Cycles and Waste Management》2023,25(2):694-697
Journal of Material Cycles and Waste Management - This NOTE summarizes process, practical case, and perspectives of intelligent bioconversion via insect (housefly larvae) for treating food waste... 相似文献
323.
Heavy metal concentrations in urban soils are likely to increase over time because of continuous urbanization and heavy metal emissions. To estimate the accumulation rates of heavy metals in urban soils, we collected soil samples from residential areas with different building ages in the metropolitan cities of Shanghai, Shenzhen, and Beijing, China. Heavy metal concentrations in the soils varied among the cities and were primarily affected by soil parent material and the intensity of anthropogen... 相似文献
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建设工程施工用电最大的特点是“临时”。施工现场是临时的,竣工后就转移;施工人员是临时的,不同工种轮番作业,工人流动性大;施工机具是临时的,不同的分部工程所用的设备、机具各有不同,用完就撤;甚至施工供电设施也是临时的,随着施工的进展,供电设施需要经常拆装移位。 相似文献
326.
基于容量迭加法的乌梁素海承载力计算 总被引:1,自引:0,他引:1
湖泊承载力的计算一般建立在水环境容量的基础上,而水环境容量的确定涉及污染物降解系数。由于乌梁素海的挺水植物、浮水植物和沉水植物呈相间分布,时有共生,分布面积也各有差异,并伴生着多种藻类,因此该湖的降解系数的确定存在一定的难度。容量迭加的方法避开了降解系数确定的问题,其物理意义明确,容易操作。应用容量迭加的方法对乌梁素海2006年5~10月的COD、TN和TP的环境容量进行了计算。从结果可以看出,水生植物群落分布和水生植物量决定了湖区对污染物的降解能力,直接影响其水环境容量。在此基础上,确定了乌梁素海5~10月的水质承载力CCPZ,将当地的社会经济发展状况与湖泊水环境承载力结合起来。计算求得CCPZ=1.115>1.0(当CCPZ=1.0时,湖泊实际承载的社会发展与允许值平衡),说明集水流域中的社会经济发展水平超过了湖泊所允许的水环境承载力,需要调整产业结构,从污染源控制污染物的排放,降低对湖区水环境的压力,实现社会、经济和环境协调可持续发展。 相似文献
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328.
Hawthorne SB Chai Y Grabanski CB Davis JW Wilken M Martin GD Miller DJ Ghosh U 《Chemosphere》2012,88(3):261-269
Supercritical fluid extraction (SFE) with pure carbon dioxide was performed at increasingly strong conditions to investigate differential binding of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) in two impacted soils, in their sieved size fractions, and in small (a few mg) samples of industry-related waste products separated from impacted soil. The binding strengths of PCDD/Fs were shown to be different in the two soils, and in their different soil particle size fractions. As might be expected based on surface area considerations, one soil showed the strongest binding in the smallest (<5 μm) sieved fraction. However, the other soil showed the strongest binding in the larger sized fractions, possibly indicating that process-related particles could be controlling PCDD/F binding. Selective SFE of various types of particles including black carbon and charcoal (separated from soil), and from a suspected process anode residue did show different PCDD/F binding behavior ranging from quite weak binding (charcoal) to very strong binding (anode particles). Shifts to the stronger SFE fractions in the soils after activated carbon treatment agreed well with the decreases previously found in the uptake of PCDD/Fs by earthworms, as well as decreases in their freely-dissolved aqueous concentrations in soil/water slurries. These results show that, as previously demonstrated for PAHs and PCBs, selective SFE can be a useful tool to investigate differences in PCDD/F binding behaviors in impacted soils and sediments and their component parts, as well as a rapid tool for estimating the effectiveness of activated carbon treatments on decreasing the bioavailability of PCDD/Fs in soils and sediments. 相似文献
329.
镧改性活性炭纤维高效吸附去除对苯醌 总被引:1,自引:0,他引:1
水处理中稀土元素一般用于砷、磷等无机污染物的吸附去除,将稀土元素镧负载在活性炭纤维上,首次用于吸附去除水中的有机污染物对苯醌。研究发现,经0.01 mol/L的La(OH)3和超声处理的活性炭纤维吸附去除对苯醌的效率最高。改性活性炭纤维对对苯醌的吸附去除受p H的影响较大,在酸性和中性条件下的吸附效果较好。对吸附动力学数据进行线性和非线性模拟,结果表明,准二级动力学模型更适合描述吸附动力学过程。热力学研究表明,对苯醌在改性活性炭纤维(ACF-2)表面以单分子层吸附为主,经Langmuir吸附等温方程模拟,298 K时对苯醌在ACF-2上的最大吸附量为149.4 mg/g。同时,降低反应温度利于吸附去除对苯醌,表明该吸附过程为自发放热的反应过程。 相似文献
330.
Chengzhen Bao Pengfei Chai Hongbo Lin Zhenyu Zhang Zhenhua Ye Mengjia Gu 《Journal of the Air & Waste Management Association (1995)》2016,66(12):1202-1213
Recently, air pollution has attracted a substantial amount of attention in China, which can be influenced by a variety of factors, but the association between air pollution and human activity is not quite clear. Based on real-time online data (January 1, 2014, to December 31, 2014) of air pollution and meteorology reported by official sites, and demographic, economic, and environmental reform data in a statistical yearbook, the influences of meteorological factors (temperature, relative humidity, precipitation intensity, and wind force) and human activities on PM2.5 pollution were explored. After correlation analysis, logistic regression analysis, and a nonparametric test, weak negative correlations between temperature and PM2.5 pollution were found. In most cases, festival and morning peak hours were protection and risk factors of PM2.5 pollution, respectively. In addition, government actions, such as an afforestation project and increasing financial expenditure for energy saving and environmental protection, could greatly contribute to alleviating pollution of PM2.5. The findings could help officials formulate effective laws and regulations, and then PM2.5 pollution related to the pattern of human activity would be ameliorated.
Implications: Most of the time, festival and morning peak hours are protection and risk factors for PM2.5 pollution, respectively. Increasing the percentage of afforestation area and financial expenditure for energy saving and environmental protection could significantly reduce PM2.5 pollution. The findings can help officials formulate effective laws and regulations, and then PM2.5 pollution related to the pattern of human activity, especially government action, will be ameliorated. 相似文献