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Episodes of thoron exposure due to consumer products claiming health benefits of negative ions

辐射防护 2020年第6期40卷 625-630页

作者： Jaiki Lee Korean Association for Radiation Protection SeoulKorea

In May 2018,the primetime news casted a shocking report saying that radon concentration on a certain model of bed mattress found to be as high as 2200 Bq/*** a humble,the Nuclear Safety and Security Commission(NSSC)of Korea confirmed that significant amount of thoron gas is emanated from several mattress models marketed by a company claiming beneficial health effects of negative *** analysis showed that some internal fabric sheets of those mattresses contain high concentration of *** was revealed that the manufacture treated the material with so-called‘negative ion powder’procured from the market and NSSC found that its radioactive content is the monazite *** measurements with reliable instruments resulted in somewhat lower values,the tentative but conservative estimates of doses to the users are still remarkable,ranging from a few to 14 mSv a *** of the affected models have been marketed from 2010 but earlier models,with lower thorium content,were supplied from *** many as 88,000 mattresses have been *** manufacturer with help of the government,recalled all the affected models and separated the radioactive internals.A large amount of waste is waiting for the government decision on disposal *** problems were identified in other consumer products including latex mattresses and pillows imported,hot pads,and several models of sanitary or health-aid *** episodes called for revisiting NORM control strategy in Korea.

关键词： negative ions health effect myth consumer products monazite thoron exposure

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Evaluation of reusing alum sludge for the coagulation of industrial wastewater containing mixed anionic surfactants

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Journal of Environmental Sciences 2011年第4期23卷 587-594页

作者： Siriprapha Jangkorn Sinchai Kuhakaew Suwapee Theantanoo Harit Klinla-or Tongchai Sriwiriyarat Environmental Science Program Faculty of Science Burapha University Department of Chemical Engineering Faculty of Engineering Burapha University

A coagulation-flocculation process is typically employed to treat the industrial wastewater generated by the consumer products industry manufacturing detergents, soaps, and others. The expenditure of chemicals including coagulants and chemicals for pH adjustment is costly for treating this wastewater. The objective of this study was to evaluate the feasibility of reusing the aluminum sulfate (alum) sludge as a coagulant or as a coagulation aid so that the fresh alum dosage can be minimized or the removal efficiency can be enhanced. The experiments were conducted in a jar-test apparatus simulating the coagulation-flocculation process for simultaneous removals of organic matters, anionic surfactants, suspended solids, and turbidity. At the optimum initial pH value of 10 and the fresh alum concentration of 400 mg/L, the total suspended solids (TSS), total chemical oxygen demand (TCOD), total anionic surfactants, and turbidity removal efficiencies were 71.5%, 76.4%, 95.4%, and 98.2%, respectively. The addition of alum sludge as a coagulant alone without any fresh alum addition could significantly remove the turbidity, TCOD, and anionic surfactants. The TSS was left in the supernatants after the settling period, but would subsequently be removed by adding the fresh alum. The TSS, TCOD, and turbidity removal efficiencies were also enhanced when both the alum sludge and the fresh alum were employed. The TCOD removal efficiency over 80% has been accomplished, which has never fulfilled by using the fresh alum alone. It is concluded that the alum sludge could be reused for the treatment of industrial wastewater generated by the consumer products industry.

关键词： alum sludge coagulation anionic surfactants consumer products

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Toxicological studies of Caesalpinia sappan wood derived dye in Wister albino rats

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Food Science and Human Wellness 2017年第1期6卷 34-38页

作者： G.Athinarayanana A.J.A.Ranjitsingh A.Usha Raja Nanthini C.Padmalatha Department of Zoology Sri Paramakalyani CollegeAlwarkurichiMS UniversityTamil NaduIndia JP College of Arts and Science TenkasiMS UniversityTamil NaduIndia Department of Biotechnology Mother Teresa UniversityKodaikanalTamil NaduIndia UGC New DelhiIndia

Natural dyes taken from the barks of the tree Caesalpinia sappan has been used in many consumer *** it is imperative to test the toxicity of this *** the present study an investigation was conducted to find out the toxic effect of aqueous extract of the dye *** in test animal Wister albino *** oral toxicity showed no clinical signs of toxicity and no mortality even at a dose level of 100–2000 mg/kg in 14 days observation *** a dose level above 2500 mg/kg was given for 28 days,no death was noticed up to the dose level 5000 mg/kg body *** weight of the tested rats was not significantly reduced,when compared with the control *** organ-body weight ratio of kidney,liver and abdomen did not change when compared to the control group in the observation *** less toxicity of the dyes of ***.

关键词： C.sappan Natural dye Dye toxicity Food grade dye consumer products

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Sampling strategy for estimating human exposure pathways to consumer chemicals

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Emerging Contaminants 2016年第1期2卷 26-36页

作者： Eleni Papadopoulou Juan A.Padilla-Sanchez Chris D.Collins Ian T.Cousins Adrian Covaci Cynthia A.de Wit Pim E.G.Leonards Stefan Voorspoels Cathrine Thomsen Stuart Harrad Line S.Haug Division of Environmental Medicine Norwegian Institute of Public HealthLovisenberggata 80456 OsloNorway Soil Research Centre Department of Geography and Environmental ScienceUniversity of ReadingWhiteknightsReading RG66DWUK Department of Environmental Science and Analytical Chemistry(ACES) Stockholm UniversitySE 10691 StockholmSweden Toxicological Center University of AntwerpUniversiteitsplein 12610 WilrijkBelgium Institute for Environmental Studies VU UniversityDe Boelelaan 10871081 HV AmsterdamThe Netherlands Flemish Institute for Technological Research(VITO) Boeretang 2002400 MolBelgium School of Geography Earth and Environmental SciencesUniversity of BirminghamEdgbaston B152TTUK

Human exposure to consumer chemicals has become a worldwide *** this work,a comprehensive sampling strategy is presented,to our knowledge being the first to study all relevant exposure pathways in a single cohort using multiple methods for assessment of exposure from each exposure *** selected groups of chemicals to be studied are consumer chemicals whose production and use are currently in a state of transition and are;per-and polyfluorinated alkyl substances(PFASs),traditional and“emerging”brominated flame retardants(BFRs and EBFRs),organophosphate esters(OPEs)and phthalate esters(PEs).Information about human exposure to these contaminants is needed due to existing data gaps on human exposure intakes from multiple exposure pathways and relationships between internal and external *** environment,food and biological samples were collected from 61 participants and their households in the Oslo area(Norway)on two consecutive days,during winter ***,dust,hand wipes,and duplicate diet(food and drink)samples were collected as indicators of external exposure,and blood,urine,blood spots,hair,nails and saliva as indicators of internal exposure.A food diary,food frequency questionnaire(FFQ)and indoor environment questionnaire were also *** 2000 samples were collected in total and participant views on their experiences of this campaign were collected via *** 91%of our participants were positive about future participation in a similar project,some tasks were viewed as *** the food diary and collection of duplicate food/drink portions were the tasksmost frequent reported as“hard”/“very hard”.Nevertheless,a strong positive correlation between the reported total mass of food/drinks in the food record and the total weight of the food/drinks in the collection bottles was observed,being an indication of accurate performance of the participants despite the challenges of the sampling campaign.

关键词： Biomonitoring Indoor environment consumer products Diet Dust Non-invasive samples

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