International Journal of Environmental Technology and Management最新文献_第10页

Removal of methyl orange from synthetic wastewater using analcime-C, MCM-41 and γ-Al2O3 composite membranes 氨肟- c、MCM-41和γ-Al2O3复合膜去除合成废水中的甲基橙

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2018-01-01 DOI: 10.1504/ijetm.2018.10019111

R. Kumar, K. Pakshirajan, G. Pugazhenthi

{"title":"Removal of methyl orange from synthetic wastewater using analcime-C, MCM-41 and γ-Al2O3 composite membranes","authors":"R. Kumar, K. Pakshirajan, G. Pugazhenthi","doi":"10.1504/ijetm.2018.10019111","DOIUrl":"https://doi.org/10.1504/ijetm.2018.10019111","url":null,"abstract":"The present study describes the fabrication of analcime-C, MCM-41 and γ-Al2O3 composite membranes and their potential in removal of anionic dye from aqueous solution. The hydrothermal crystallisation technique was employed to deposit the charged inorganic oxides such as analcime-C, MCM-41 and γ-Al2O3 on the low cost ceramic support. The formation and purity of analcime-C, MCM-41 and γ-Al2O3 powders were verified by XRD analysis. The porosity, average pore size and water permeability of analcime-C composite membrane were calculated as 24% (23% and 29% for MCM-41 and γ-Al2O3 composite membrane), 0.155 μm (0.173 and 0.970 μm for MCM-41 and γ-Al2O3 composite membrane) and 4.53 × 10−8 m3/m2s.kPa (6.05 × 10−8 and 8.23 × 10−6 m3/m2s.kPa for MCM-41 and γ-Al2O3 composite membrane), respectively. To identify the effectiveness of the prepared composite membranes, applied pressure of the filtration process and initial dye concentration was varied to study their influence on the permeate flux and percentage of dye removal. The results showed that the percentage of dye removal is found to be reduced while increasing applied pressure for all the membranes. The maximum percentage of methyl orange removal was exhibited as 67% for analcime-C, 44% for MCM-41 and 56% for γ-Al2O3 membrane.","PeriodicalId":13984,"journal":{"name":"International Journal of Environmental Technology and Management","volume":"21 1","pages":"111"},"PeriodicalIF":0.6,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66766644","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: 2

Designing a sustainable municipal solid waste management system in Pathum Thani, Thailand 在泰国巴吞他尼设计可持续的城市固体废物管理系统

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007527

S. Olapiriyakul

引用次数: 11

Ammonia removal from poultry manure leachate via struvite precipitation: a strategy for more efficient anaerobic digestion 通过鸟粪石沉淀去除禽粪渗滤液中的氨:一种更有效的厌氧消化策略

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007532

C. Farrow, A. Crolla, C. Kinsley, E. McBean

{"title":"Ammonia removal from poultry manure leachate via struvite precipitation: a strategy for more efficient anaerobic digestion","authors":"C. Farrow, A. Crolla, C. Kinsley, E. McBean","doi":"10.1504/IJETM.2017.10007532","DOIUrl":"https://doi.org/10.1504/IJETM.2017.10007532","url":null,"abstract":"To improve poultry waste management, the feasibility of enabling efficient anaerobic digestion of poultry manure through reduction of ammonia accumulation is examined. This study employs struvite precipitation to control ammonia accumulation, and focuses on the efficacy of ammonia removal under neutral reaction conditions (pH = 7). The impacts of phosphate and magnesium additives, pH, temperature and the N:Mg:P molar ratio are quantified. Magnesium chloride (MgCl2 • 6H2O) and monopotassium phosphate (KH2PO4) are shown to be the most efficient combination of additives for total ammoniacal nitrogen (TAN) reduction of poultry manure leachate under neutral reaction conditions (pH = 7), demonstrating a TAN reduction of 90.3%. Modification of molar ratios (NH4:Mg:PO4) evidenced no significant benefit with regard to TAN reduction. However, increasing the fraction of supplementary magnesium resulted in a statistically significant (p < 0.05) decrease in phosphate concentration within the leachate. This study demonstrates the advantages of struvite precipitation, as a method of ammonia control, to improve anaerobic digestion and hence management of poultry manure. Although an effective means of TAN control, struvite precipitation from poultry manure is an ineffective means of obtaining pure struvite due to the formation of co-precipitates.","PeriodicalId":13984,"journal":{"name":"International Journal of Environmental Technology and Management","volume":"20 1","pages":"87-100"},"PeriodicalIF":0.6,"publicationDate":"2017-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45573428","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: 6

Effects of cadmium on growth, short-term photosynthetic acclimation and metal accumulation in radish plants (Raphanus sativus L.) 镉对萝卜生长、短期光合驯化及金属积累的影响

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007530

Austin H. Nguyen, C. Hoying, Theresa M. Urbina, P. Drennan

{"title":"Effects of cadmium on growth, short-term photosynthetic acclimation and metal accumulation in radish plants (Raphanus sativus L.)","authors":"Austin H. Nguyen, C. Hoying, Theresa M. Urbina, P. Drennan","doi":"10.1504/IJETM.2017.10007530","DOIUrl":"https://doi.org/10.1504/IJETM.2017.10007530","url":null,"abstract":"Plants displaying heavy metal hyper-accumulation and high biomass could be used in phytoextraction. The present study utilises photosynthetic acclimation rates and morphological measurements to gauge cadmium toxicity in radish plants raised on nutrient solutions containing 0, 5, 10 and 20 µM CdCl2. Growth rates displayed a dose-dependent decline with cadmium exposure. Photosynthetic acclimation was significantly reduced compared to controls in all cadmium treatments. Inductively coupled plasma mass spectrometry was used to determine cadmium accumulation. In both the roots and shoots of the plant, cadmium levels were significantly higher than the controls in 10 and 20 µM treatments. Significantly more cadmium was distributed into the roots compared to shoots. A moderate tolerance for and reasonable accumulation of cadmium makes the radish a candidate for phytoremediation in marginally contaminated environments. Furthermore, the sensitivity of photosynthetic acclimation rates to cadmium exposure serves as a potential bioindicator of cadmium contamination.","PeriodicalId":13984,"journal":{"name":"International Journal of Environmental Technology and Management","volume":"20 1","pages":"78-86"},"PeriodicalIF":0.6,"publicationDate":"2017-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47501816","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: 2

Analysis of polychlorinated biphenyls treatment present in transformers oils 变压器油中多氯联苯处理分析

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007524

K. Dumorné, Margie Zorrilla Velazco, Petra G. Velazco Pedroso

引用次数: 1

Assessment of heavy metal contamination zones of biota of Western Uttar Pradesh Terrain, India using atomic absorption spectroscopy 使用原子吸收光谱法评估印度北方邦西部地区生物区系的重金属污染区

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007523

Nazia Tarannum, R. Agrawal, R. Yadav, A. Yadav, R. Soni

引用次数: 1

Analysis of emission models integrated with traffic models for freight transportation study in urban areas 城市货运研究中排放模型与交通模型的结合分析

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007529

H. L. F. Dias, B. V. Bertoncini, M. L. Oliveira, F. S. Cavalcante, Ed Pinheiro Lima

引用次数: 6

Assessing treatment of lead (Pb II) from industrial wastewater on dried bulbs of water hyacinth: adsorption capacity, isotherm and kinetic study 工业废水中铅（PbII）在水葫芦干球茎上的吸附性能、等温线和动力学研究

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007533

Tiyasha Kanjilal, C. Bhattacharjee, S. Datta

{"title":"Assessing treatment of lead (Pb II) from industrial wastewater on dried bulbs of water hyacinth: adsorption capacity, isotherm and kinetic study","authors":"Tiyasha Kanjilal, C. Bhattacharjee, S. Datta","doi":"10.1504/IJETM.2017.10007533","DOIUrl":"https://doi.org/10.1504/IJETM.2017.10007533","url":null,"abstract":"Remediation through aquatic macrophytes treatment system for the removal of noxious contaminants from wastewater is an emerging environmental protection technique. The dried and acid-alkali treated bulbs of water hyacinth (WHB) having high porosity and O2-filled functional groups were utilised to treat Pb(II) from industrial wastewater. Characterisation of WHB with FESEM, XRD and FTIR exhibited the presence of several carboxyls, hydroxyl, ketonic, aldehydes and other O2-filled functional groups showing WHB adsorption with highest monolayer capacity of (Qm) 38.614 mg/g. WHB adsorption directed towards the pseudo-second order kinetics and Langmuir isotherm mechanism. The study also emphasised effective regeneration of WHB using HNO3, NaOH and vacuum dry. The bio-sorption mechanism was observed to be endothermic spontaneous reaction process, with ΔG decreased from -0.71 to -8.53 with increasing temperature. With optimised and controlled process conditions, only 5.0 g L−1 of WHB bio-sorbent could significantly treat about 85.3% of 100 mg L−1 of Pb(II) within 120 minutes at pH 7.0 and 30°C. Also a comparative optimisation study of ANN and RSM were used to predict the WHB bio-sorption bioprocess. Therefore, WHB have efficient potential to be commercially applicable as an environmental-friendly and economical bio-sorbent for treatment of Pb(II) from solutions and effluent from paint industry.","PeriodicalId":13984,"journal":{"name":"International Journal of Environmental Technology and Management","volume":"20 1","pages":"101-127"},"PeriodicalIF":0.6,"publicationDate":"2017-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46343098","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: 2

Application of combined emergent plants in floating bed for phytoremediation of landscape pond in South China 浮床组合挺水植物在华南景观塘植物修复中的应用

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-09-13 DOI: 10.1504/IJETM.2017.10007525

P. Huang, Dan J. Zhang, S. Bai, Song-yan Qin

引用次数: 4

Actinobacteria are better bioremediating agents for removal of toxic heavy metals: an overview 放线菌是去除有毒重金属的较好生物修复剂

IF 0.6

International Journal of Environmental Technology and Management Pub Date : 2017-01-01 DOI: 10.1504/IJETM.2017.10010678

K. Kannabiran

引用次数: 10