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矿山废水造成附近水体及环境严重污染,为了保护水资源和矿区环境,必须采取有效的技术措施,使矿山废水净化。采用石灰中和法处理洛南县九龙矿业有限公司酸性矿山废水,通过半年多的运行检验表明,处理效果良好,出水达标,系统运行稳定。SS、COD、NIt3一N等去除率均达到90%以上。 相似文献
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利用电渗析技术脱除头孢氨苄酶法母液废水中的盐分,研究了操作电压、浓缩室与淡化室流速比、温度等因素对电渗析脱盐过程的影响,并研究了反渗透膜法处理脱盐母液废水的膜通量变化趋势。实验结果表明,当淡化室、浓缩室流量均为500 L/h(流速比1∶1),操作电压为25 V,温度30℃时,电渗析在高效脱盐的同时具有理想的有机物截留率达99.50%以上,能耗3.65 kW.h/kg;反渗透膜法在处理脱盐母液废水时,膜通量衰减较慢,水回收率达到75.67%。实验结果表明,利用电渗析、反渗透组合工艺处理头孢氨苄酶法母液废水具有良好的可行性。 相似文献
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正0前言我国约有电镀厂1万余家,排放电镀废水约为4.0×109m3/a[1],造成了严重的环境污染和损失。目前,多采用化学沉淀法处理电镀废水[2]。本工作采用化学方法通过控制pH值沉淀分离不同的金属离子,对某电镀厂的酸性镀锡废水进行了处理,实现了金属及废水的回收利用。 相似文献
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杨洋 《中国新技术新产品》2018,(2)
目前,社会各界对废水处理的重视程度不断提高,在降低废水对环境的污染的同时,提高资源的回收与利用效率。基于此,本文将通过对粘胶短纤维酸性废水中硫酸根处理与资源化的试验,分析pH值、氯化钡与碳酸钡量、搅拌时间与速度、反应温度对硫酸根沉淀的影响,进而获得处理、资源化硫酸根的方式,降低废水中的污染成分,为相关人员提供参考。 相似文献
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Kumar Manoj Ajay Kumar P. V. Pugazhenthi G. Pakshirajan Kannan 《Clean Technologies and Environmental Policy》2023,25(4):1309-1322
Clean Technologies and Environmental Policy - Acid mine drainage (AMD) typically has a high amount of copper that can be recovered in pure form for different industrial applications. This study... 相似文献
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E.R. Cornelissen P. Sijbers H. van den Berkmortel J. Koning A. De Wit F. De Nil J.F. Van Impe 《Membrane Technology》2001,2001(136):6-9
This article shows that it is technically possible to produce high-grade quality water, which can be used for process water (as a substitute for ground-water), from a leachate waste-water stream. By using external MEMBIOR technology on the leachate waste-water, high removal efficiencies are obtained for both organic compounds and for nitrogen. High membrane fluxes are also obtained, which were stable during the last two months of a test period. 相似文献
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Acid mine drainage (AMD) in Yunfu iron sulfide mine contain Fe(2+), Fe(3+), and Al(3+) up to 8000, 1700 and 1200 mg/L, respectively. Phosphorus removal from synthetic wastewater with 10mg/L of total phosphorus (TP) concentration and second municipal effluent with 3.5-4.0mg/L of TP concentration were conducted with the AMD by jar tests. Dosage of the AMD and initial pH of water are the two most important parameters affecting the performance of phosphorus removal of the AMD. The optimal phosphorus removal efficiency and residual iron ions (TFe) concentration are 97.0% and 3.0mg/L, respectively, at 1.61 Fe/P molar ratio and pH 8.03 for synthetic wastewater, and 92.1% and 0.32 mg/L, respectively, for second municipal effluent at 1.41 Fe/P molar ratio and pH 7.3. Resultant heavy metal concentration in effluents and precipitate was very low, and the risk of resultant heavy metal contamination was very small. The phosphorus removal performance of the AMD was much similar to that of ferric sulfate (FS) and polyferric sulfate (PFS), and better than that of FeSO(4). And residual TFe concentration in treated water arising from utilization of the AMD was similar to that of FeSO(4), and higher than that of FS and PFS. The AMD could be used as coagulant for phosphorus removal from wastewater directly due to the presence of Fe(2+), Fe(3+), and Al(3+) largely. 相似文献
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Removal and recovery of metal ions from acid mine drainage using lignite--A low cost sorbent 总被引:2,自引:0,他引:2
Acid mine drainage (AMD), has long been a significant environmental problem resulting from the microbial oxidation of iron pyrite in presence of water and air, affording an acidic solution that contains toxic metal ions. The main objective of this study was to remove and recover metal ions from acid mine drainage (AMD) by using lignite, a low cost sorbent. Lignite has been characterized and used for the AMD treatment. Sorption of ferrous, ferric, manganese, zinc and calcium in multi-component aqueous systems was investigated. Studies were performed at different pH to find optimum pH. To simulate industrial conditions for acid mine wastewater treatment, all the studies were performed using single and multi-columns setup in down flow mode. The empty bed contact time (EBCT) model was used for minimizing the sorbent usage. Recovery of the metal ions as well as regeneration of sorbent was achieved successfully using 0.1 M nitric acid without dismantling the columns. 相似文献
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In this study, well-dispersed gold nanoparticles were prepared by the reduction of HAuCl4 in sodium bis(2-ethylhexyl)sulfosuccinate/isooctane reverse micelles system using ascorbic acid as reducing agent. The properties
of the obtained nanoparticles were characterized with transmission electron microscopy, X-ray diffraction, thermogravimetric
analysis, and UV–vis absorption spectrophotometer. Due to its high water solubility, biodegradability, and low toxicity, ascorbic
acid could be used as a benign naturally available reducing agent to synthesize gold nanoparticles. 相似文献
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Acid mine drainage (AMD) from abandoned coal mines continues to be one of the most significant environmental problems. Remediation of AMD requires an addition of lime source to decrease the acidity, and grouting the entire mine and encapsulating the pyrite by calcium-rich additives is often employed. Utilization of alkaline coal combustion by-products (CCBs) has gained acceptance in such remediation applications because of their cost-effectiveness. A study was conducted to investigate the effectiveness of CCBs to abate acid mine drainage by encapsulation of pyrite. Geomechanical, hydraulic, and environmental tests were performed on grouts prepared with various ratios of CCBs as well as an alternative free lime source, lime kiln dust (LKD). The results indicated that the mechanical properties of grouts were dependent on their free lime contents. Hydraulic conductivities of pyrite-grout columns were relatively high due to the coating of the pyrite rock with the grout rather than the filling of all of the void spaces, as commonly experienced in field applications. The leaching tests indicated that the presence of high amounts of lime in a grout is not solely sufficient to improve the quality of AMD, since the rate of dissolution of a high lime content grout may be slow due to its rapid hardening. Therefore, it is recommended that grouts be selected with consideration of their hardening capacities, as well as the percentage of lime content present in the mixture. 相似文献
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Effect of hardness on acute toxicity of metal mixtures using Daphnia magna: prediction of acid mine drainage toxicity 总被引:2,自引:0,他引:2
In this study, the effect of hardness on the combined outcome of metal mixtures was investigated using Daphnia magna. The toxic unit (TU) was calculated using modified LC(50) values based on the hardness (i.e., LC(50-soft) and LC(50-hard)). From a bioassay test, the degree of sensitivity to hardness on the toxicity changes was in the order: Cd相似文献