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Environmental Technology

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https://www.readbyqxmd.com/read/30028646/removal-of-heavy-metals-from-landfill-leachate-using-zero-valent-iron-and-granular-activated-carbon
#1
Bilardi Stefania, Calabrò Paolo Salvatore, Greco Rosa, Moraci Nicola
The possibility of a landfill leachate pre-treatment, aiming at heavy metals removal, by means of either zero valent iron (ZVI), or granular activated carbon (GAC) or by a mixture of the two materials, was investigated in this paper through batch and column tests. For this purpose a synthetic landfill leachate containing heavy metals (i.e. Cu, Ni, Zn), chloride, sulphates, ammonium and organic matter was prepared. Batch tests results demonstrated the efficiency of ZVI, GAC and ZVI/GAC mixture in heavy metals removal (efficiency > 90%) and their negligible effect on the other contaminants...
July 20, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30028277/kinetic-modeling-of-total-petroleum-hydrocarbon-in-spent-lubricating-petroleum-oil-impacted-soil-under-different-treatments
#2
Amechi S Nwankwegu, Yiping Li, Long Jiang, Qiuying Lai, Weng Shenglin, Wei Jin, Kumud Acharya
The integration of first and second order kinetic model in parameter estimation for the degradation pattern of total petroleum hydrocarbon (TPH) in spent lubricating petroleum oil (SLPO) over a four-month period was the subject of the present investigation. Study design considered four treatment microcosms notably; sewage sludge (SB), monitored natural recovery (MNR), surfactant (SA) and control (SO). The rate of TPH degradation using sewage sludge as amendment material depicted effective TPH removal within ten weeks...
July 20, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30028240/applicability-of-lignin-polymers-for-automobile-brake-pads-as-binder-and-filler-materials-and-their-performance-characteristics
#3
Jeesu Park, Hyewon Hwang, Jae Young Kim, Joon Weon Choi
We present environmentally-friendly brake pads produced with three different types of lignin, soda lignin (SL), sulfuric acid lignin (SAL) and heat-treated SAL (HL), as frictional materials to replace phenol formaldehyde resin (PFR, binder) and cashew nut shell liquid (CNSL, filler) in commercial automobile brake pad. Then the performance characteristics of the lignin-added brake pads were tested and compared using several fundamental tests. The results showed that lignin-added brake pads adhered to the SAE standard (0...
July 20, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30016201/mitigation-of-soil-loss-from-turfgrass-cultivation-by-utilizing-poultry-abattoir-sludge-compost-and-biochar-on-low-organic-matter-soil
#4
Saim Ozdemir, Neclet Nusret Nuhoglu, Omer Hulusi Dede, Kaan Yetilmezsoy
Commercial turfgrass cultivation is one of the main ornamental industry world-wide, however, successive turfgrass sod cutting from the same site remove surface soil leading to decline soil organic matter, impair soil fertility and cause environment degradation. The present study was aimed to investigate the applicability of poultry abattoir sludge compost (PASC) and biochar (BC) on the establishment of turfgrass by evaluating plant growth performance and mitigation of soil loss by organic waste amendments. The experimental study was designed on the soil which had originally low-organic matter content and previously used as a turfgrass sod harvested site in a sandy loam soil...
July 17, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30016186/multi-hydrolytic-enzyme-accumulation-and-microbial-community-structure-of-anaerobic-co-digestion-of-food-waste-and-waste-activated-sludge
#5
Kun Luo, Xiao Xie, Qi Yang, Fei Chen, Yu Zhong, Pin Xie, Gui Wang
The accumulation of multi-hydrolytic enzyme through anaerobic co-digestion of waste activated sludge (WAS) and food waste (FW) was studied by regulating temperature, pH, and the mass ratio of FW to WAS (F/W). Experimental results showed that temperature had a profound effect on the activity of enzyme and the most suitable temperature for the accumulation of amylase and protease was 37℃ and 50℃, respectively. The highest activity of amylase and protease accumulated reached 10.29 and 19.23 U/mL at F/W ratio of 2:1...
July 17, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30015571/metabolite-identification-of-ibuprofen-biodegradation-by-patulibacter-medicamentivorans-under-aerobic-conditions
#6
Ricado Salgado, Dulce Brito, Joao P Noronha, Babara Almeida, R Maria Bronze, Adrian Oehmen, Gilda Carvalho, Mario T Barreto Crespo
Ibuprofen (IBU) is a non-steroidal anti-inflammatory drug that is becoming increasingly recognised as an important micropollutant to be monitored in wastewater treatment plants (WWTP), since it has been detected in effluents at the µg L-1 level. The IBU metabolites from biological degradation are not completely understood and can represent a threat to natural aquatic systems. Patulibacter medicamentivorans was previously isolated from WWTP sludge and found to be capable of IBU degradation. The aerobic biodegradation of ibuprofen by this organism was investigated in a batch lab-scale reactor for identification of the metabolites formed...
July 17, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30015569/performance-evaluation-of-treating-oil-containing-restaurant-wastewater-in-microbial-fuel-cell-using-in-situ-graphene-polyaniline-modified-titanium-oxide-anode
#7
ZhiLiang Li, ShengKe Yang, Ya'nan Song, HaiYang Xu, ZongZhou Wang, WenKe Wang, YaQian Zhao
Most studies conducted nowadays to boost electrode performance in microbial fuel cell (MFC) have focused on carbonaceous materials. The titanium suboxides (Ti4 O7 , TS) is able to provide a new alternative for achieving better performance in MFC and has been tested and demonstrated in this study. The Ti4 O7 electrode with high electrochemical activity was modified by graphene/polyaniline via the constant potential method. Electrogenic microorganisms were more conducive to adhere to the anode electrode due to the presence of graphene/polyaniline...
July 17, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30014769/corrigendum
#8
(no author information available yet)
No abstract text is available yet for this article.
July 17, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30010517/a-study-on-near-zero-liquid-discharge-approach-for-treating-of-reverse-osmosis-membrane-concentrate-by-electrodialysis
#9
Cigdem Balcik-Canbolat, Cisel Sengezer, Hacer Sakar, Ahmet Karagunduz, Bulent Keskinler
A lab scale electrodialysis (ED) which consisted of eleven pieces of cation-exchange membranes (CEMs) and ten pieces of anion-exchange membranes (AEMs) was used to treat concentrated brine of Reverse osmosis(RO) membrane. The effect of operating parameters such as applied voltage, flowrate, and operating modewas investigated to measurethe performance ofa lab-scale ED.Three different voltages (5, 10, and 15 V) and flowrates (20, 30, and 40 L/h) were applied in order to optimize the operating conditions of the ED system...
July 16, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30010507/the-enhanced-effect-of-oxalic-acid-on-the-electroreduction-of-cr-vi-via-formation-of-intermediate-cr-vi-oxalate-complex
#10
Yijie Liu, Shuaishuai Xin, Bo Jiang
In this study, the enhanced effect of oxalic acid (Ox) on Cr(VI) electroreduction was evaluated. It was found that for Cr(VI)-contaminated solution ([Cr(VI)]0 = 1.0 mM, pH = 3.0), addition of 5.0 mM Ox can significantly increase Cr(VI) reduction from 0.36 to 1.0 mM within 90 min electrolysis reaction, accompanying with the increase of current efficiency from 19% to 53%. Increasing initial Ox concentration (0-10 mM) and electric current (10-40 mA) facilitated Cr(VI) reduction, whereas it was inhibited with decreasing solution pH value (2...
July 16, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30010506/elucidation-of-2-4-dichlorophenol-degradation-by-bacillus-licheniformis-strain-sl10
#11
S Chris Felshia, N AshwinKarthick, R Thilagam, A Gnanamani
2, 4-Dichlorophenol (2, 4-DCP) is a priority pollutant according to US EPA. Its use in various chemical industries and its presence in the effluent necessitate effective removal studies. The present study focuses on degradation of 2, 4-DCP by phenol adapted bacteria Bacillus licheniformis strain SL10 (MTCC 25059) at relatively faster rate. The organism exhibited tolerance to 150 ppm of 2, 4-DCP and showed linear relationship between the growth and substrate concentration (µmax 0.022/h) and the inhibitory concentration was 55...
July 16, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30010497/carbonaceous-decomposition-of-a-recalcitrant-effluent-treated-by-the-photo-fenton-process-a-kinetic-approach
#12
Hélcio José Izário Filho, Adriano Francisco Siqueira, Marco Aurélio Kondracki de Alcântara, Leandro Gonçalves Aguiar, Alessandro Sampaio Cavalcanti
Natural effluents with marked variation in their chemical composition, over decomposition time in the matrix from which they are generated have complex composition and are not totally known in most cases. Landfill leachate can be considered an effluent with complex composition, requiring imminent and more comprehensive studies on organic load degradation. Such complexity of numerous organic compounds (most of them recalcitrant humic and fulvic substances) demands a large number of kinetic equations to satisfactorily describe the temporal evolution of such conversion...
July 16, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30010496/biodegradation-of-pharmaceuticals-and-personal-care-products-in-the-sequential-combination-of-activated-sludge-treatment-and-soil-aquifer-treatment
#13
Kai He, Yasuhiro Asada, Shinya Echigo, Sadahiko Itoh
Soil aquifer treatment (SAT), applied after activated sludge treatment (AST), has been widely used for wastewater reclamation. AST and SAT show potential for removing micropollutants, including pharmaceuticals and personal care products (PPCPs). However, the role of sequential combination of AST and SAT on the biodegradation of PPCPs was not clear in previous studies. In this study, the removal characteristics of PPCPs in AST and SAT were evaluated to assess the legitimacy of sequential combination of AST and SAT...
July 16, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29995596/co-metabolic-substrates-enhanced-biological-nitrogen-removal-from-cellulosic-ethanol-biorefinery-wastewater-using-aerobic-granular-sludges
#14
He Wang, Xue Li, Zhiyuan Gong, Xiaolong Wang, Hong Liang, Dawen Gao
The effect of different co-metabolic substrates (glucose, acetic acid and ethanol) on aerobic granular sludge treating cellulose ethanol wastewater was investigated using sequencing batch reactors. The efficiencies of the three substrates in removing chemical oxygen demand were respectively 18.87%, 28.88% and 27.99%, all of which were remarkably higher than without co-metabolic substrates, indicating that co-metabolic substrates can promote the degradation of the refractory substances. With acetic acid as the co-metabolic substrate, the removal amount of ammonium nitrogen and nitrate nitrogen was greater than glucose and ethanol used...
July 11, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29995593/feasibility-of-using-a-novel-algal-bacterial-biofilm-reactor-for-efficient-domestic-wastewater-treatment
#15
Yao Gou, Jixiang Yang, Fang Fang, Jinsong Guo, Hua Ma
Current algal-bacterial consortia require high hydraulic retention times (HRTs, 2-10 days) to efficiently remove pollutants from domestic wastewaters. A novel algal-bacterial biofilm reactor was developed for a much lower HRT. The results showed that an HRT of 12 hours ensured 90% removal of organic matter and ammonium, and phosphate removal was approximately 30%. Decreasing the HRT to 8 hours significantly deteriorated the reactor's pollutant removal efficiencies and increasing the HRT to 24 hours did not improve these efficiencies...
July 11, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29993344/enhanced-fluoride-adsorption-of-aluminum-humate-and-its-resistance-on-fluoride-accumulation-in-tea-leaves
#16
Chunyan Huang, Heng Zhang, Wenhao Zeng, Jun Ma, Shilin Zhao, Yunfu Jiang, Churui Huang, Hui Mao, Yang Liao
Tea trees (Camellia sinensis) can take in fluorine from soil and the content of fluorine in tea increases with maturity, leading to high content of fluoride in tea leaves and tea products. Long-term consumption of high fluoride tea products could result in chronic fluoride intoxication. Confining the fluoride in the earth with absorbents to reduce the fluoride accumulation of the tea trees during the growth period which could radically control the fluoride level in tea product. Humic acid (HA), a kind of organic matter in the earth was used as raw material to prepare adsorbent aluminum humate (HAA) by aluminum modification...
July 11, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29993337/biogenic-iron-oxides-for-phosphate-removal
#17
Raimonda Buliauskaitė, Philipp Wilfert, Prashanth Suresh Kumar, Weren W J M de Vet, Geert-Jan Witkamp, Leon Korving, Mark C M van Loosdrecht
Biogenic iron oxides (BioFeO) formed by Leptothrix sp. and Gallionella sp. were compared with chemically formed iron oxides (ChFeO) for their suitability to remove and recover phosphate from solutions. The ChFeO used for comparison included a commercial iron based adsorbent (GEH) and chemically oxidized iron precipitates from groundwater. Despite contrary observations in earlier studies the batch experiments showed that BioFeO do not have superior phosphate adsorption capacities compared to ChFeO. However, it seems multiple mechanisms are involved in phosphate removal by BioFeO which make their overall phosphate removal capacity higher than that of ChFeO...
July 11, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29985115/enhanced-solar-water-disinfection-using-zno-supported-photocatalysts
#18
Supamas Danwittayakul, Supachai Songngam, Sittha Sukkasi
Nano-structured ZnO photocatalysts on cellulose and polyester supports were developed for enhancing solar water disinfection (SODIS). The photocatalysts were fabricated by a two-step hydrothermal method, in which ZnO nanoparticles were synthesized and deposited on a cellulose or polyester support as a seed layer, followed by the growth of one-dimensional ZnO nanorods on the seed layer in a liquid bath containing zinc nitrate and hexamethylene tetramine as sources of precursors. The morphologies and phase compositions of the synthesized ZnO nanorods from different growth conditions were investigated with FE-SEM and XRD, respectively...
July 9, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29985103/krcl-and-xecl-excilamps-and-lp-hg-lamp-for-uv-and-uv-h-2-o-2-decolorization-of-dyes-in-water
#19
A Aristizábal, G Perilla, J A Lara-Borrero, R Diez
In the present study, the decolorization efficiencies of LP-Hg lamp, XeCl and KrCl excilamps at the same power density were compared for the decolorization of dyes in water by UV and UV/H2 O2 processes in a batch reactor. Laboratory prototypes of XeCl and KrCl excilamps and a commercial LP-Hg lamp were studied as UV sources. Methylene Blue and Eliamine Blue dyes were used as model pollutants. The effect of the initial concentrations of dye and the initial H2 O2 concentration in the TOC removal and kinetic parameters were also studied...
July 9, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29985102/enhanced-adsorption-of-cd-ii-using-a-composite-of-poly-acrylamide-co-sodium-acrylate-incorporated-ldh-mos-4-2
#20
Mei Yang, Liang Peng, Anwei Chen, Qingru Zeng, Jihai Shao, Si Luo, Jidong Gu
The Mg/Al layered double hydroxide (Mg/Al-LDH) intercalated with the MoS4 2- (MoS4 -LDH) impregnated into poly(acrylamide-co-sodium acrylate) (PP) was synthesized as layered double hydroxides-PP (LDHS-PP), whose characterization, adsorption properties and mechanisms were investigated. The maximum adsorption capacity (qm ) for Cd(II) was ∼2789.58 mg/g by 1% LDHS-PP, while it was ∼1893.09 mg/g by PP, which indicated that the MoS4 -LDH greatly improved the Cd(II) uptake for PP in aqueous solution. In strongly acidic conditions (∼pH 3...
July 9, 2018: Environmental Technology
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