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851.
Lau Yien Jun Karri Rama Rao Mubarak Nabisab Mujawar Lau Sie Yon Chua Han Bing Khalid Mohammad Jagadish Priyanka Abdullah Ezzat Chan 《Environmental science and pollution research international》2020,27(32):40121-40134
Environmental Science and Pollution Research - The feasibility and performance of Jicama peroxidase (JP) immobilized Buckypaper/polyvinyl alcohol (BP/PVA) membrane for methylene blue (MB) dye... 相似文献
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超声波净化石油污染土壤实验研究 总被引:3,自引:0,他引:3
为研究超声波技术处理石油污染土壤的影响因素,选取了土壤含油量、土水比、土壤类型、超声处理时间和超声功率5个因素进行了具有交互作用的正交实验,并讨论了各因素对土壤中石油污染物清除率的影响。实验结果表明超声波对土壤中石油污染物的净化效果明显,总石油烃(TPH)的清除率在23.0%到77.3%之间,土壤类型对净化效果的影响最为显著,粘土中的TPH清除率显著低于砂土。由超声空化引起的解吸作用和真空抽滤是实验过程中土壤TPH减少的主要途径。研究结果表明超声波技术用于石油污染土壤修复是可行并且有效果的。 相似文献
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活性炭纤维载体生物膜法处理洗车废水研究 总被引:2,自引:2,他引:0
为了实现洗车废水的循环使用,进行了以聚丙烯腈基活性炭纤维(PAN-ACF)为生物膜载体处理洗车废水的实验研究。以LAS、COD和NH3-N等指标考察了活性炭纤维生物膜反应器对洗车废水的处理效果。结果表明:在常温下、pH=6.5~7,当进水流量在30 mL/min时,反应器达到最佳运行参数,活性炭纤维载体生物膜法对LAS、COD和NH3-N等的去除率分别达到了97%、80%和60%。出水水质完全达到《生活杂用水水质标准》(CJ/T48-99)中洗车用水主要水质指标的规定。此外,实验表明PAN-ACF作为生物膜载体具有很好的生物亲和性和再生性。 相似文献
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Wang Xiaolong Han Jingyi Zhang Qi 《Environmental pollution (Barking, Essex : 1987)》2010,158(5):1513-1520
To delineate the character of contaminations in the Grand Canal, China, a three-year study (2004-2006) was conducted to investigate variations the water quality in the canal. Results showed that the variation of water quality within the Grand Canal was of there is remarkable spatial and seasonal heterogeneity regarding water quality within the Canal. Values of contaminants in dry-season were obviously higher than those in wet-season. Sites influenced strongly by industry and urbanization showed higher contents of nutrients and lower levels of dissolved oxygen in water body; moreover these sites were severely polluted by dissolved metals with the contents of cadmium, chromium and copper exceeding the Criteria Maximum Concentration (CMC), US EPA. Multivariate statistical analysis suggested nutrient and dissolved metals pollution was the dominant environmental problems within the Canal. Anthropogenic influences played a dominant role in the character of contaminations in the Grand Canal. 相似文献
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设计了异波折板水解酸化-A2O一体化反应器,进行生活污水处理的实验研究。10个月的实验结果表明,系统的最佳水力停留时间(HRT)为8 h时,最适COD进水浓度为240-100mg/L,最佳混合液回流比(r)-污泥回流比(R)为250%-100%。控制反应器于以上运行参数下,25±2℃所对应的COD、TN和TP去除率分别为96.84%、67.55%和81.92%。当温度降至7℃时,其COD、TP和TN分别降至86.35%、50.25%和65.68%。基于实验分析结果,阐明了一体化反应器高效性的机理在于异波折板水解酸化段具有高效传质特性和A2O段具有复合式活性污泥-接触氧化好氧池的特点。 相似文献
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Jung-Geun Han Jong-Young Lee Ki-Kwon Hong Jai-Young Lee Young-Woong Kim Sun-Mi Hong 《Journal of Material Cycles and Waste Management》2010,12(3):227-234
The aim of the present study was to analytically provide adsorption characteristics of Cu2+ and Zn2+ using carbonized food waste (CFW); more specifically, batch tests were conducted using various concentrations of metal ions, contact times, and initial pH levels in an attempt to understand the adsorption removal of heavy metal ions in aqueous solution at concentrations ranging between 50 and 800 mg/l. The results confirmed that the adsorption equilibrium was established within a maximum of 80 min, and the maximum concentrations for adsorption of Cu2+ and Zn2+ were 28.3 and 23.5 mg/g, respectively. These adsorption levels indicate that CFW has better performance than many other adsorbents. In experiments using different pH conditions, the applicability to acid wastewater was found to be high, and an excellent adsorption removal ratio of 75%–90% was observed under acid conditions at pH 2–4. Furthermore, as the adsorption time increased, the calcium component in the CFW began to leach into the aqueous solution and raise the pH, accordingly causing the removal of heavy metal ions partially as a result of precipitation. When our results were analyzed using the Langmuir model and the Freundlich model for isothermal adsorptivity, the activity of CFW in this study was shown to be more consistent with the former; the adsorption speed of Cu2+ and Zn2+ according to a pseudosecond-order reaction model was found to be very fast for an initial concentration of not more than 100 mg/l. In a test in which an attempt was made to compare adsorption capacity values obtained from the experiments in this study with the aforementioned three models, the pseudosecond-order reaction model was found to provide results closest to the actual values. 相似文献