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Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering

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https://www.readbyqxmd.com/read/30407113/residue-levels-and-spatial-distribution-of-phthalate-acid-esters-in-water-and-sediment-from-urban-lakes-of-guangzhou-china
#1
Zhihong Zhang, Chao Zhang, Zehua Huang, XiaoHui Yi, Hui Zeng, Mingzhu Zhang, Mingzhi Huang
The residue levels and composition profiles of phthalate acid esters (PAEs) in water and sediment samples were investigated in eight urban lakes of Guangzhou, China. A total of 23 water and 16 sediment samples were collected. Results showed that all target PAEs were detected with dimethyl phthalate and di(2-ethylhexyl) phthalate as the most abundant compounds. The total concentrations of PAEs from different urban lakes were in the range of 273-1173 ng/L for water and 16.5-242 ng/g for sediments, with the geometric mean of 515 ng/L and 75...
November 8, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30407104/natural-clays-with-an-inherent-uranium-component-that-nevertheless-sequester-uranium-from-contaminated-water
#2
Antonio Lara, Emilio Rivera, Young Ho Park, Raul Rivera, Tiffany Fowler, Jeremy Jones
Clays present a cost effective and sustainable method for removing uranium and heavy metals from drinking water because of their cation exchange capabilities. However, managing muddy suspensions is problematic; therefore, clay pellets as presented in this article are a promising alternative. Three standard clays and two regional clays were evaluated for sorption, both in powder form and in pellet structure for comparison. The objective was to evaluate individual sorption processes and assess the effect on uranium sorption due to the process of altering the clay powder to produce pellets...
November 8, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30406705/the-use-of-zeolite-based-additives-for-immobilising-iron-during-pressure-filtration-of-coal-refuse-slurry
#3
Gireesh S S Raman, Mark S Klima
Pressure filtration of coal refuse slurry has the potential to provide a concentrated solids stream that can be stacked, thereby offering multiple environmental benefits. However, potential leachates from the solids stream can impact the environment. In that context, this study performed preliminary investigations of the application of zeolite-based additives to adsorb metals leaching from coal refuse slurry at low pH. Additives were added to the coal refuse slurry, which was filtered using bench- and lab-scale pressure filtration units...
November 8, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30406701/defluoridation-of-synthetic-and-industrial-wastewater-by-using-acidic-activated-alumina-adsorbent-characterization-and-optimization-by-response-surface-methodology
#4
Usha Kumari, Sushanta K Behera, B C Meikap
Excessive contamination of fluoride in wastewater is the cause of several chronic health problems. For this purpose, an adsorbent was prepared from alumina by acidic activation using sulfuric acid. The current research aims to find the maximum fluoride adsorption (%) from synthetic and industrial wastewater at optimum process parameters by using response surface methodology (RSM). All batch scale experiments were carried out according to the statistical-design order. Central composite design (CCD) was applied to ascertain the effect of adsorbent dose, pH, initial fluoride concentration and temperature on fluoride adsorption (%)...
November 8, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30359556/new-technology-and-practice-of-dust-pollution-control-with-foam-jet-in-underground-mines
#5
Xin-Xiao Lu, Hong-Qing Zhu, De-Ming Wang
Foam is used as an efficient means of dust suppression in underground coal mines. The poor performance of conventional adding device of foaming agent restricts its wide application. The objective of this study is to propose and investigate a new parallel jet adding device (PJAD). Experimental results show that PJAD requires a greater water flow to produce negative pressure than the single stage jet adding device (SJAD) and is harder to generate cavitation. PJAD consumes a less pressure loss than SJAD and realizes any adding proportion below 1%, which is especially suitable for precision addition of foaming agent...
October 25, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30285535/evaluation-of-pressurised-carbon-dioxide-pre-treatment-aimed-at-improving-the-sanitisation-and-anaerobic-digestibility-of-co-settled-sewage-sludge
#6
Maryam Mushtaq, Charles J Banks, Sonia Heaven
This work reports on the use of pressurized CO2 pretreatment to improve methane yield and pathogen indicator organism die-off in co-settled sewage sludge (SS). Four semi-continuous mesophilic anaerobic digesters were fed on co-settled SS to establish a baseline for performance and stability. One pair of digesters was then fed with co-settled SS pretreated by P CO2 at 2800 kPa for 23 h. The trial continued for 70 days during which specific biogas and methane production, volatile solids destruction and loss of viability of Escherichia coli was monitored in test and control digesters...
October 4, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30230958/estimates-of-parameters-for-formaldehyde-emission-model-from-plywood-panel-under-various-temperature-and-relative-humidity-conditions
#7
Changqing Su, Hua Ming, Ye Yang, Weiwu Ma, Hailong Li, Liqing Li
The initial emittable concentration, Cm, 0 , the material phase diffusion coefficient, Dm , and the air/material partition coefficient, K, are the key parameters used to predict the formaldehyde emissions from indoor building materials. This work presents formaldehyde emission experiments of plywood panels in a climatic chamber under various environmental conditions, which provides information on how relative humidity, temperature, and loading degree affect the formaldehyde emission. The experimental results showed that formaldehyde concentration in the climatic chamber increased rapidly during the initial 3 h, and then reached equilibrium after 7 h...
September 19, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30199354/determination-of-16-pahs-and-22-pcbs-in-honey-samples-originated-from-different-region-of-lebanon-and-used-as-environmental-biomonitors-sentinel
#8
Josephine Al-Alam, Ziad Fajloun, Asma Chbani, Maurice Millet
In order to assess the air quality in some Lebanese regions, a biomonitoring study based on honey as biomonitor candidate was conducted. For this, 18 samples of honey collected from four regions in Lebanon, were analyzed for their contamination by 16 polycyclic aromatic hydrocarbons (PAHs) and 22 polychlorinated biphenyls (PCBs). Samples were first extracted using a multi-residue extraction method based on the quick, easy, cheap, effective, rugged, and safe extraction method (QuEChERS) followed by a concentration step using Solid-phase microextraction (SPME) procedures...
September 10, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30199323/effects-of-carbon-source-c-n-ratio-nitrate-temperature-and-ph-on-n-2-o-emission-and-functional-denitrifying-genes-during-heterotrophic-denitrification
#9
Yun-Yeong Lee, Hyungjoo Choi, Kyung-Suk Cho
The effects of operational parameters such as carbon source, C/N ratio, initial nitrate concentration, temperature, and pH value on heterotrophic denitrification and functional denitrifying genes were evaluated. When methanol was used as the sole carbon source, complete denitrification was performed in a short time without nitrous oxide (N2 O) emission. Complete denitrification was performed at high C/N ratios (5.14 and 12.85) and low initial nitrate concentrations (75.9 and 151.6 mg N L-1 ). The denitrification rate was not temperature-sensitive in the range of 25-35 °C, but tended to decrease at a low pH of 5-6...
September 10, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/30193082/removal-of-acetone-from-air-emissions-by-biotrickling-filters-providing-solutions-from-laboratory-to-full-scale
#10
Pau San-Valero, Carmen Gabaldón, Francisco Javier Álvarez-Hornos, Marta Izquierdo, Vicente Martínez-Soria
A full-scale biotrickling filter (BTF) treating acetone air emissions of wood-coating activities showed difficulties to achieve outlet concentrations lower than 125 mg C m-3 , especially for high inlet concentrations and oscillating emissions. To solve this problem, a laboratory investigation on acetone removal was carried out simulating typical industrial conditions: discontinuous and variable inlet concentrations and intermittent spraying. The results were evaluated in terms of removal efficiency and outlet gas emission pattern...
September 7, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29775126/efforts-to-remove-aqueous-lithium-ion-using-octolig%C3%A2-and-methylated-derivatives
#11
Dean F Martin, Kirpal S Bisht
Aqueous Li+ - containing samples (in DI water or well water) were eluted over Octolig®, a polyethylenediimine covalently attached to a high- surface-area silica gel, and only slight removal, if any, could be claimed. However, when using tetrahydrofuran (THF) as a solvent we quantitatively removed lithium ion with Octolig® or with alkylated Octolig®, demonstrating the efficacy of Octolig® and lack of advantage of a N, N'-dialkylated Octolig®. In addition, the removal of alkali metal ions (lithium, sodium, and potassium) in THF by Octolig® was partially selective: While being quantitative for lithium it was only about 40% for potassium...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29764286/environmental-evaluation-of-flocculation-efficiency-in-the-separation-of-the-microalgal-biomass-of-scenedesmus-sp-cultivated-in-full-scale-photobioreactors
#12
Marisa D Scherer, Fernando J C Magalhães Filho, Amanda C Oliveira, Nelson F H Selesu, Cássia M L Ugaya, André B Mariano, José V C Vargas
In this paper the environmental evaluation of the separation process of the microalgal biomass Scenedesmus sp. from full-scale photobioreactors was carried out at the Research and Development Nucleus for Sustainable Energy (NPDEAS), with different flocculants (iron sulfate - FeCl3 , sodium hydroxide - NaOH, calcium hydroxide - Ca(OH)2 and aluminum sulphate Al2 (SO4 )3 , by means of the life cycle assessment (LCA) methodology, using the SimaPro 7.3 software. Furthermore, the flocculation efficiency by means of optical density (OD) was also evaluated...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29719162/molecular-and-eco-physiological-characterization-of-arsenic-as-transforming-achromobacter-sp-kas-3-5-t-from-as-contaminated-groundwater-of-west-bengal-india
#13
Balaram Mohapatra, Tulasi Satyanarayana, Pinaki Sar
Molecular and eco-physiological characterization of arsenic (As)-transforming and hydrocarbon-utilizing Achromobacter type strain KAs 3-5T has been investigated in order to gain an insight into As-geomicrobiology in the contaminated groundwater. The bacterium is isolated from As-rich groundwater of West Bengal, India. Comparative 16S rRNA gene sequence phylogenetic analysis confirmed that the strain KAs 3-5T is closely related to Achromobacter mucicolens LMG 26685T (99.17%) and Achromobacter animicus LMG 26690T (99...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29708842/toxicity-assessment-of-untreated-treated-electroplating-sludge-using-human-and-plant-bioassay
#14
Visnja Orescanin, Ksenija Durgo, Ivanka Lovrencic Mikelic, Ivan Halkijevic, Marin Kuspilic
The purpose of this work was to assess the risk to the environment arising from the electroplating sludge from both chemical and toxicological point of view. Both approaches were used for the assessment of the treatment efficiency which consisted of CaO based solidification followed by thermal treatment at 400°C. The elemental composition was determined in the bulk samples and the leachates of untreated sludge. The toxicity of the leachate was determined using two human colorectal adenocarcinoma cell lines (Caco-2 and SW 480) and Hordeum vulgare L...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29708839/the-effect-of-two-bromfenvinphos-impurities-bdcee-and-%C3%AE-ketophosphonate-on-oxidative-stress-induction-acetylcholinesterase-activity-and-viability-of-human-red-blood-cells
#15
Bożena Bukowska, Bogumiła Huras, Monika Jarosiewicz, Jolanta Witaszewska, Marta Słowińska, Katarzyna Mokra, Jerzy Zakrzewski, Jaromir Michałowicz
Numerous research works have shown that synthesis of pesticides leads to the formation of impurities that may substantially enhance pesticide toxicity. In this study, the effect of manufacturing impurities of pesticide bromfenvinphos (BFVF) such as 1-bromo-2-(2,4-dichlorophenyl)-2-ethoxy ethene (BDCEE) and diethyl [2-(2,4-dichlorophenyl)-2-oxo-ethyl] phosphonate (β-ketophosphonate) on human erythrocytes, being significantly exposed to xenobiotics has been studied. The cells were treated with the compounds studied in the concentrations ranging from 0...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29708831/pre-digestion-to-enhance-volatile-fatty-acids-vfas-concentration-as-a-carbon-source-for-denitrification-in-treatment-of-liquid-swine-manure
#16
Sarah Xiao Wu, Lide Chen, Jun Zhu, McKenzie Walquist, David Christian
Insufficient denitrification in biological treatment is often a result of the lack of a carbon source. In this study, use of the volatile fatty acids (VFAs) generated via pre-digestion as a carbon source to improve denitrification in sequencing batch reactor (SBR) treatment of liquid swine manure was investigated. The pre-digestion of swine manure was realized by storing the manure in a sealed container in room temperature and samples were taken periodically from the container to determine the VFA levels. The results showed that after 14 days of pre-digestion, the VFA level in the digested liquid was increased by 200%...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29708823/levels-of-potentially-toxic-metals-in-water-sediment-and-peat-from-wonderfonteinspruit-north-west-province-south-africa
#17
Ntumba C Nsaka, Robert I McCrindle, Abayneh A Ambushe
Environmental monitoring of the levels of potentially toxic metals is of importance because of possible adverse effects on living species. This study was conducted to assess the levels of Cd, Cr, Cu, Hg, Mn, Pb, U and V in water, sediment and peat samples collected from the region of Wonderfonteinspruit. Water samples were simply filtered and acidified with HNO3 prior to analysis. Sediment and peat were oven-dried, ground, sieved and mineralised using a microwave digestion system. Concentrations of the selected elements in all samples were determined by inductively coupled plasma-mass spectrometry...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29672214/use-of-artificial-neuronal-networks-for-prediction-of-the-control-parameters-in-the-process-of-anaerobic-digestion-with-thermal-pretreatment
#18
Rita Flores-Asis, Juan M Méndez-Contreras, Ulises Juárez-Martínez, Alejandro Alvarado-Lassman, Daniel Villanueva-Vásquez, Alberto A Aguilar-Lasserre
This article focuses on the analysis of the behavior patterns of the variables involved in the anaerobic digestion process. The objective is to predict the impact factor and the behavior pattern of the variables, i.e., temperature, pH, volatile solids (VS), total solids, volumetric load, and hydraulic residence time, considering that these are the control variables for the conservation of the different groups of anaerobic microorganisms. To conduct the research, samples of physicochemical sludge were taken from a water treatment plant in a poultry processing factory, and, then, the substrate was characterized, and a thermal pretreatment was used to accelerate the hydrolysis process...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29672207/oxidation-of-propyl-paraben-by-ferrate-vi-kinetics-products-and-toxicity-assessment
#19
Jibin An, Chunqiu Xia, Jiahong He, Huixia Feng
Propyl paraben (propyl 4-hydroxybenzoate, PPB), one of the typically used paraben species in various pharmaceutical and personal care products, has been found in different aquatic environment, which could affect the water quality and human health. In this paper, the degradation of PPB by aqueous ferrate (Fe(VI)) was investigated in different water matrix and reaction kinetics as a function of pH was determined. Intermediate products of the degradation process were isolated and characterized by the high performance liquid chromatography/mass spectrometry/mass spectrometry techniques...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29652205/environmental-impact-of-biogas-a-short-review-of-current-knowledge
#20
REVIEW
Valerio Paolini, Francesco Petracchini, Marco Segreto, Laura Tomassetti, Nour Naja, Angelo Cecinato
The social acceptance of biogas is often hampered by environmental and health concerns. In this study, the current knowledge about the impact of biogas technology is presented and discussed. The survey reports the emission rate estimates of the main greenhouse gases (GHG), namely CO2 , CH4 and N2 O, according to several case studies conducted over the world. Direct emissions of gaseous pollutants are then discussed, with a focus on nitrogen oxides (NOx ); evidences of the importance of suitable biomass and digestate storages are also reported...
August 24, 2018: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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