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Study on the removal of toxic substance from river water using O_3-GAC process
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作者 杨玉楠 孙志荣 +2 位作者 王宝贞 杨敏 李文兰 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第4期447-451,共5页
This paper studied on the removal of toxic substance from river water using O3-GAC process. The result of GC/MS analysis indicated that the number of organic compound species was decreased by 55.1%. The species of tox... This paper studied on the removal of toxic substance from river water using O3-GAC process. The result of GC/MS analysis indicated that the number of organic compound species was decreased by 55.1%. The species of toxic substance of raw water also decreased from 16 to 5. The total removal rate of CODMn andUV254 were 45%~72% and 60%~80% following O3-GAC treatment. It reflected that this process had a good effective on removing unsaturation organic which absorb UV and toxic organic containing nitrogen. The results of Ames test indicated that raw water had a relatively strong mutagicity on TA 98. The O3-GAC process had a good ability in removing mutagen in water. The effluent water’s mutagicity is minus. The results of the study indicated that the effluent of the O3-GAC process was meet the demand of drinking water. 展开更多
关键词 removal of toxic substance O_3-GAC process GC/MS analysis
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Synthesis of new superabsorbent poly(NIPAAm/AA/N-allylisatin)nanohydrogel for effective removal of As(Ⅴ) and Cd(Ⅱ) toxic metal ions 被引量:5
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作者 Viran P.Mahida Manish P.Patel 《Chinese Chemical Letters》 SCIE CAS CSCD 2014年第4期601-604,共4页
The present studies highlight the effective removal of As(V) and Cd(II) from aqueous solutions by superabsorbent poly (NIPAAm/AA/N-allylisatin) nanohydrogel. Batch removal studies were performed as a function of... The present studies highlight the effective removal of As(V) and Cd(II) from aqueous solutions by superabsorbent poly (NIPAAm/AA/N-allylisatin) nanohydrogel. Batch removal studies were performed as a function of treatment time, initial metal ion concentration, pH, and adsorbent dose. TEM micrographs confirm the particle size distribution in the range between 5 nm and 10 rim. The simple and metal ions adsorbed nanohydrogels were characterized by FF-IR, TGA, and EDX analysis. Finally, the equilibrium removal efficiency of the nanohydrogel was analyzed according to the Langmuir and Freundlich adsorption isotherm models which showed the removal of As(V) and Cd(II) metal ions fitted to Freundlich and Langmuir isotherms, respectively. Removal efficiency order of the metal ions is As(V) 〉 Cd(II). 展开更多
关键词 removal Toxic metal ions Superabsorbent Nanohydrogel
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Investigation on removal pathways of Di 2-ethyl hexyl phthalate from synthetic municipal wastewater using a submerged membrane bioreactor 被引量:2
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作者 Mehdi Zolfaghari Patrick Drogui +4 位作者 Brahima Seyhi Satinder Kaur Brar Gerardo Buelna Rino Dubé Nouha Klai 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第11期37-50,共14页
Highly hydrophobic Di 2-ethyl hexyl phthalate(DEHP) is one of the most prevalent plasticizers in wastewaters. Since its half-life in biological treatment is around 25 days, it can be used as an efficiency indicator ... Highly hydrophobic Di 2-ethyl hexyl phthalate(DEHP) is one of the most prevalent plasticizers in wastewaters. Since its half-life in biological treatment is around 25 days, it can be used as an efficiency indicator of wastewater treatment plant for the removal of hydrophobic emerging contaminants. In this study, the performance of submerged membrane bioreactor was monitored to understand the effect of DEHP on the growth of aerobic microorganisms. The data showed that the chemical oxygen demand(COD)and ammonia concentration were detected below 10 and 1.0 mg/L, respectively for operating conditions of hydraulic retention time(HRT) = 4 and 6 hr, sludge retention time(SRT) = 140 day and sludge concentration between 11.5 and 15.8 g volatile solid(VS)/L. The removal efficiency of DEHP under these conditions was higher and ranged between 91% and 98%. Results also showed that the removal efficiency of DEHP in biological treatment depended on the concentration of sludge, as adsorption is the main mechanism of its removal. For the submerged membrane bioreactor, the pore size is the pivotal factor for DEHP removal, since it determines the amount of soluble microbial products coming out of the process. Highly assimilated microorganisms increase the biodegradation rate, as 74% of inlet DEHP was biodegraded; however, the concentration of DEHP inside sludge was beyond the discharge limit. Understanding the fate of DEHP in membrane bioreactor,which is one of the most promising and futuristic treatment process could provide replacement for conventional processes to satisfy the future stricter regulations on emerging contaminants. 展开更多
关键词 Di 2-ethyl hexyl phthalate Submerged membrane bioreactor removal efficiency Soluble microbial products toxicity
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Effect of Removing Toxic Substances Combined with Activating Blood Circulation on Stabilizing the Atherosclerotic Plaque and Unstable Angina 被引量:3
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作者 张文高 《Chinese Journal of Integrative Medicine》 SCIE CAS 2009年第5期325-327,共3页
The therapeutic effects of activating blood circulation to remove stasis of Chinese medicine (CM) in the prevention and treatment of atherosclerotic diseases such as coronary artery disease and angina are generally ... The therapeutic effects of activating blood circulation to remove stasis of Chinese medicine (CM) in the prevention and treatment of atherosclerotic diseases such as coronary artery disease and angina are generally acknowledged. In recent years, to further improve the therapeutic effects of those Chinese herbs on such diseases, we have carried out a series of studies of CM medications with the function of clearing heat and removing toxic substances combined with activating blood circulation to remove stasis. 展开更多
关键词 UA Effect of Removing Toxic Substances Combined with Activating Blood Circulation on Stabilizing the Atherosclerotic Plaque and Unstable Angina CRP
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Non-thermal plasma treatment of Radix aconiti wastewater generated by traditional Chinese medicine processing 被引量:4
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作者 Yiyong Wen Jianping Yi +3 位作者 Shen Zhao Song Jiang Yuming Chi Kefu Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第6期99-108,共10页
The wastewater effluent from Radix aconiti processing, an important step in the production processes of traditional Chinese medicine(TCM), is a type of toxic wastewater and difficult to treat. Plasma oxidation metho... The wastewater effluent from Radix aconiti processing, an important step in the production processes of traditional Chinese medicine(TCM), is a type of toxic wastewater and difficult to treat. Plasma oxidation methods have emerged as feasible techniques for effective decomposition of toxic organic pollutants. This study examined the performance of a plasma reactor operated in a dielectric barrier discharge(DBD) to degrade the effluent from R. aconiti processing. The effects of treatment time, discharge voltage, initial pH value and the feeding gas for the reactor on the degradation of this TCM wastewater were investigated. A bacterium bioluminescence assay was adopted in this study to test the toxicity of the TCM wastewater after non-thermal plasma treatment. The degradation ratio of the main toxic component was 87.77% after 60 min treatment with oxygen used as feed gas and it was 99.59% when the initial p H value was 8.0. High discharge voltage and alkaline solution environment were beneficial for improving the degradation ratio. The treatment process was found to be capable of reducing the toxicity of the wastewater to a low level or even render it non-toxic. These experimental results suggested that the DBD plasma method may be a competitive technology for primary decomposition of biologically undegradable toxic organic pollutants in TCM wastewater. 展开更多
关键词 Traditional Chinese medicine(TCM) wastewater Plasma Advanced oxidation processes(AOPs) Acute toxicity Aconitum alkaloid removal
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