Removal of Cr(VI) from Aqueous Solutions Using Buckwheat (Fagopyrum esculentum Moench) Hull through Adsorption–Reduction: Affecting Factors,Isotherm, and Mechanisms          下载免费PDF全文

Kebin Li  Yanhui Zhang  Yan Dang  Hong Wei  Qiquan Wang 《洁净——土壤、空气、水》2014,42(11):1549-1557

  相似文献   

Effects of pH Manipulation,Biological Reduction,and Plant Growth on Cu2+ and Zn2+ Removal from Mine Drainage Using Iron‐Oxide‐Enriched Red Earth Soils          下载免费PDF全文

Youchi Zhang  Chaohua Hu  Wensui Luo 《洁净——土壤、空气、水》2014,42(9):1272-1279

  相似文献   

Hydrodynamic and Water Quality Modeling of Lake Eğirdir          下载免费PDF全文

Meltem Kaçıkoç  Mehmet Beyhan 《洁净——土壤、空气、水》2014,42(11):1573-1582

  相似文献   

A Preliminary Study on the Occurrence of Pharmaceutically Active Compounds in the River Basins and Their Removal in Two Conventional Drinking Water Treatment Plants in Chongqing,China          下载免费PDF全文

Qing Yan  Yi‐Xin Zhang  Jia Kang  Xiu‐Mei Gan  Peng Xu‐Y  Jin‐Song Guo  Xu Gao 《洁净——土壤、空气、水》2015,43(6):794-803

  相似文献   

Studies on Human Pharmaceuticals in Jordanian Wastewater Samples          下载免费PDF全文

Mohammed El‐Dosoky  Mahmoud Alawi  Mufeed Batarseh  Arum Widyasari  Robert Kreuzig  Müfit Bahadir 《洁净——土壤、空气、水》2015,43(4):504-511

  相似文献   

Chemical Oxygen Demand Elimination and Decolorization of Textile Industrial Effluent by an Indigenous Fungal Species Aspergillus foetidus          下载免费PDF全文

Lakhvinder Singh  Praveen Sharma  Asalapuram Ramachandran Pavankumar 《洁净——土壤、空气、水》2015,43(3):456-461

  相似文献   

Performance of Surfactant Assisted Synthesis of Fe/TiO2 on the Photodegradation of Diisopropanolamine          下载免费PDF全文

Raihan Mahirah Ramli  Fai Kait Chong  Abdul Aziz Omar  Thanapalan Murugesan 《洁净——土壤、空气、水》2015,43(5):690-697

  相似文献   

真空负载方式对疏浚淤泥脱水过程中脱水规律的影响     

浩婷  王曦  周颜  吴燕 《岩土力学》2015,36(11):3187-3192

采用自主改装的变压头黏土渗透仪,模拟疏浚淤泥脱水过程中水分在淤泥颗粒多孔介质中的迁移运动过程,通过测定疏浚淤泥脱水过程中渗透系数与过滤常数、渗水量与滤液量、泥饼含水率与孔隙率,探究了负载压力为100 kPa时,不同负载方式（负载时间及负载压力梯度变化）对疏浚淤泥脱水过程中过滤和渗流规律的影响。研究发现：负载下的过滤和渗流同时进行,负载1 h期间,前期0～40 min内过滤占主导地位,后期40～60 min内渗流起关键作用。负载压力梯度由原来1 h内间隔变化1次,变为以20 kPa为梯度递增变化5次,随着压力变化梯度减小,渗透系数、过滤常数增加,淤泥脱水性能得到较明显的改善,并且前期负载压力越小,脱水效果越好。  相似文献   

Treatment of Refractory Organics Contained in Actual Agro‐Industrial Wastewaters by UV/H2O2     

Ahmed Bedoui  Kaiis Sindi  Nasr Bensalah 《洁净——土壤、空气、水》2008,36(4):373-379

In this work, the treatment of actual agro‐industrial wastewaters (IWW) by a UV/H₂O₂ process has been investigated. The aqueous wastes were received from industrial olive oil mills and then treated by laboratory scale physicochemical methods, i. e., coagulation using ferrous and aluminum sulfate, decantation, filtration and adsorption on activated carbon. These wastes are brown colored effluents and have a residual chemical oxygen demand (COD) in the range of 1800 to 3500 mgO₂ L^–1, which cannot be further eliminated with physicochemical processes. The UV/H₂O₂ treatments were carried out under monochromatic irradiation at 254 nm using a thermostated reactor equipped with a mercury vapor lamp located in an axial position. The effects of initial H₂O₂ concentration, initial COD, pH and temperature have been studied in order to determine the optimum conditions for maximum color and COD removals. The experimental results reveal the suitability of the UV/H₂O₂ process for both removal of high levels of COD and effectively decolorizing the solution. In particular, 95% of color removal and 90% of COD removal were obtained under conditions of pH = 5 and 32°C using 2.75 g H₂O₂ g^–1 COD L^–1 during 6 h of UV‐irradiation. The treatment is unaffected by pH over the range 2 to 9. In addition, the COD removal is improved by increasing the temperature, whereas the color removal has not been affected by this parameter. The results show that the hydroxyl radicals generated from the catalytic decomposition of H₂O₂ by UV‐irradiation of the solution could be successfully used to mineralize the organics contained in IWW. The mineralization of the organics seems to occur in three main sequential steps: the first is the rapid decomposition of tannins leading to aromatic compounds, which are confirmed by the decolorization of the IWW; the second step corresponds to the oxidation of aromatics leading to aliphatic intermediates, which occurs by the cleavage of an aromatic ring, and is established by the removal of aromatics, and the final step is the slow oxidation of the aliphatic intermediates, which is measured by the COD removal.  相似文献   

Biosorption of Nickel from Synthetic and Electroplating Industrial Solutions using a Green Marine Algae Ulva reticulata     

Kuppusamy Vijayaraghavan 《洁净——土壤、空气、水》2008,36(3):299-305

The present work investigated the biosorption of nickel from synthetic and electroplating industrial effluents using a green marine algae Ulva reticulata. Preliminary batch results imply that pH 4.5 was optimum for nickel uptake and the isotherm experiments conducted at this pH condition indicated that U. reticulata can biosorb 62.3 mg g^–1 nickel ions from synthetic solutions, according to the Langmuir model. Desorption was effective and practical using 0.1 M CaCl₂ (pH 2.5, HCl) and the biomass was regenerated and reused for three cycles. Continuous biosorption experiments were performed in an upflow packed column (2 cm I.D and 35 cm height). Among the two electroplating effluents used, effluent‐1 is characterized by excess co‐ions and high nickel ion content. This influenced the column nickel uptake with U. reticulata exhibiting 52.1 mg g^–1 in the case of effluent‐1 compared to 56.5 mg g^–1 in the case of synthetic solution. On the other hand U. reticulata performed well in effluent‐2 with uptakes of 53.3 and 54.3 mg g^–1 for effluent‐2 and synthetic solution, respectively. Mathematical modeling of column experimental data was performed using nonlinear forms of the Thomas‐ and modified dose‐response models, with the latter able to simulate breakthrough curves with high correlation coefficients.  相似文献