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Pulp and Papermill Effluent Treatment by Continuous Electrocoagulation 连续电凝法处理制浆造纸废水
Journal of Applied Science and Education (JASE) Pub Date : 1900-01-01 DOI: 10.54060/jase.v3i1.27
Ashima Srivastava, Shyni Singh
{"title":"Pulp and Papermill Effluent Treatment by Continuous Electrocoagulation","authors":"Ashima Srivastava, Shyni Singh","doi":"10.54060/jase.v3i1.27","DOIUrl":"https://doi.org/10.54060/jase.v3i1.27","url":null,"abstract":"The continuous electrocoagulation (CEC) technique, which uses aluminium (Al) as an electrode material, is examined in this work for the treatment of highly toxic pulp and papermill effluents. The process optimization was done with respect to the flow rates (L h−1) and residence time (τ) of wastewater which resulted in the excellent removal of Total solids (TS), colour and Chemical Oxygen Demand (COD). The removal rate of COD was 94.4 and 93.1% at the optimal flow rates of 0.5 and 1.0 dm3 h−1, correspondingly, whereas the colour removal rate was 91.6 and 83.6%. There was gradual decrease in the pH of the effluent during the process due to the production of aluminium hydroxides in variable oxidation states. Variation in the cell voltage during the electrolysis has also been studied. TDS of effluent was also decreased by a factor of 93% after 4 h residence time at a flow rate of 0.5 dm3 h−1. With a variation in flow rates, electrode degradation and consumption were also examined.","PeriodicalId":434252,"journal":{"name":"Journal of Applied Science and Education (JASE)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127581030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Use of Biomonitoring in Health Risk Assessment of Workers to Heavy Metals in Industrial Environment 生物监测在工业环境重金属工人健康风险评价中的应用
Journal of Applied Science and Education (JASE) Pub Date : 1900-01-01 DOI: 10.54060/jase.v3i1.22
R. Mehra, A. Thakur
{"title":"Use of Biomonitoring in Health Risk Assessment of Workers to Heavy Metals in Industrial Environment","authors":"R. Mehra, A. Thakur","doi":"10.54060/jase.v3i1.22","DOIUrl":"https://doi.org/10.54060/jase.v3i1.22","url":null,"abstract":"The problem of occupational and work exposure to trace and toxic metals existed at the beginning of industrialization which even persists today. Biomonitoring is the analytical science with multidisciplinary applications that guides industrialist in assessment, management and prevention of trace and toxic metal exposure to workers at workplace. In the present research work, 40 workers were included for the study as subjects out of which, 20 were exposed and 20 were included as controls. Head hair samples were collected from all the subjects and were pretreated for decontamination by wash-ing then digested to get colourless solution prior to analysis for lead (Pb) and cadmium (Cd) with an Atomic Absorption Spectrophotometer.","PeriodicalId":434252,"journal":{"name":"Journal of Applied Science and Education (JASE)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114244176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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