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Wanying Wu, Diyun Chen, Jinwen Li, Minhua Su, Nan Chen
Uranium is a hazardous and radioactive element. Effective removal of uranium from wastewater stream requires advanced functional materials and reliable technologies. Red mud is a type of low-cost adsorbent which is widely used in the adsorption process. In the present work, we successfully modified the raw red mud to gain a series of highly efficient sorbents for uranium removal. They are nitric acid dealkalized red mud (DRM), aluminum nitrate modified red mud (ARM), and ferric nitrate modified red mud (FRM)...
April 24, 2018: Environmental Science and Pollution Research International
S Kalafatakis, S Braekevelt, A Lymperatou, A Zarebska, C Hélix-Nielsen, L Lange, I V Skiadas, H N Gavala
Forward osmosis (FO) is a low energy-intensive process since the driving force for water transport is the osmotic pressure difference, Δπ, between the feed and draw solutions, separated by the FO membrane, where πdraw  > πfeed . The potential of FO in wastewater treatment and desalination have been extensively studied; however, regeneration of the draw solution (thereby generating clean water) requires application of an energy-intensive process step like reverse osmosis (RO). In this study, the potential of applying FO for direct water recirculation from diluted fermentation effluent to concentrated feedstock, without the need for an energy-intensive regeneration step (e...
April 24, 2018: Bioprocess and Biosystems Engineering
Lucia Gusmaroli, Sara Insa, Mira Petrovic
During the last decades, the quality of aquatic ecosystems has been threatened by increasing levels of pollutions, caused by the discharge of man-made chemicals, both via accidental release of pollutants as well as a consequence of the constant outflow of inadequately treated wastewater effluents. For this reason, the European Union is updating its legislations with the aim of limiting the release of emerging contaminants. The Commission Implementing Decision (EU) 2015/495 published in March 2015 drafts a "Watch list" of compounds to be monitored Europe-wide...
April 24, 2018: Analytical and Bioanalytical Chemistry
Xin Zheng, Nannan Yu, Xiaopeng Wang, Yuhong Wang, Linshan Wang, Xiaowu Li, Xiaomin Hu
In the present paper, granular activated carbon (GAC) supported titanium dioxide (TiO2 @GAC) particles were prepared by sol-gel process. Their performance in simultaneous adsorption of dye and Cu2+ from wastewater was studied. X-ray diffraction (XRD) indicated that TiO2 of the TiO2 @GAC microsphere is anatase type, and Fourier transform infrared spectroscopy (FT-IR) showed that the samples have obvious characteristic peaks in 400-800 cm-1 , which indicated that there are Ti-O-Ti bonds. The experimental results showed that the adsorption of TiO2 @GAC for Methylene blue (MB) and Cu2+ were favorable under acidity condition, the adsorption of Methyl orange (MO) was favorable under alkalecent condition...
April 24, 2018: Scientific Reports
Hitoshi Kodamatani, Shannon L Roback, Megan H Plumlee, Kenneth P Ishida, Hiroto Masunaga, Noboru Maruyama, Takahiro Fujioka
A newly developed, ion exchange-based inline pretreatment system was used to mitigate the effect of background constituents in natural water and treated wastewater to achieve rapid, reliable, and sensitive analysis of N-nitrosamines. The pretreatment system (anion exchange module, AEM) was incorporated into a high-performance liquid chromatograph (HPLC) coupled with a photochemical reactor (PR) and chemiluminescence (CL) detector (HPLC-PR-CL), which can analyze four hydrophilic N-nitrosamines at ng/L levels...
April 13, 2018: Journal of Chromatography. A
Mohammad Dinari, Reyhane Tabatabaeian
Finding effective methodologies for the removal of heavy metals from contaminated water are really significant. Facile and "green" techniques for adsorbents fabrication are in high demand to satisfy a wide range of practical applications. This report presents of an efficient method for preparing Fe3 O4 @ layered double hydroxide@ guargum bionanocomposites (GLF-BNCs). First of all, the LDH coated Fe3 O4 nanoparticles were simply synthesized, using ultrasonic irradiation. The citrate coated Fe3 O4 nanoparticles which were under negative charging and LDH nanocrystals which were charged positively make electrostatic interaction which formed a stable self-assembly component, and then guargum as a biopolymer were linked onto Fe3 O4 @LDH via an in situ growth method...
July 15, 2018: Carbohydrate Polymers
Jing Ji, Yang Liu, Xue-Yuan Yang, Juan Xu, Xiu-Yan Li
The removal of high-concentration rhodamine B (RhB) wastewater was investigated in a three-dimensional electrochemical reactor (3DER) packed with granular activated carbon (GAC) particle electrodes. Response surface methodology (RSM) coupled with grey relational analysis (GRA) was used to evaluate the effects of voltage, initial pH, aeration rate and NaCl dosage on RhB removal and energy consumption of the 3DER. The optimal conditions were determined as voltage 7.25 V, pH 5.99, aeration rate 151.13 mL/min, and NaCl concentration 0...
April 21, 2018: Journal of Environmental Management
Yuktee Dogra, Alan G Scarlett, Darren Rowe, Tamara S Galloway, Steven J Rowland
Petroleum acids, often called 'Naphthenic Acids' (NA), enter the environment in complex mixtures from numerous sources. These include from Produced and Process-Affected waters discharged from some oil industry activities, and from the environmental weathering of spilled crude oil hydrocarbons. Here, we test the hypothesis that individual NA within the complex mixtures can induce developmental abnormalities in fish, by screening a range of individual acids, with known chemical structures. Sixteen aromatic NA were tested using a Thamnocephalus platyrus (beavertail fairyshrimp) assay, to establish acute toxicity...
April 14, 2018: Chemosphere
Diana Nara Ribeiro de Sousa, Sara Insa, Antonio Aparecido Mozeto, Mira Petrovic, Thiago Faheina Chaves, Pedro Sergio Fadini
The performances of two FAU-type zeolites with different SiO2 /Al2 O3 ratios were evaluated for the removal of antibiotics of three different classes, namely azithromycin, ofloxacin, and sulfamethoxazole, from aqueous solutions. Commercial zeolites were used, without any previous treatment. Use of a small adsorbent dosage resulted in fast antibiotic adsorption that followed pseudo-second order kinetics. The removals of azithromycin and sulfamethoxazole were highly pH-dependent, with low removal percentages observed under acid (pH 2...
April 17, 2018: Chemosphere
Yepu Li, Shengli Wang, Qian Zhang, Fei Zang, Zhongren Nan, Huiling Sun, Wen Huang, Lili Bao
Soil fluoride (F) and cadmium (Cd) pollution are of great concern in recently years, due to the fact that considerable amounts of wastewater, gas and residue, containing F and Cd, have been discharged into the environment through ore smelting. Soil F and Cd contamination may result in their interaction in soil and plant, which affects their fractionation distribution in soil and accumulation in oilseed rape. Oilseed rape, which is widely planted and consumed as a popular vegetable in arid and semi-arid land of northwest China, has been believed to a hyperaccumulator for Cd...
April 17, 2018: Plant Physiology and Biochemistry: PPB
Dao Guan, Ji Dai, Yoshimasa Watanabe, Guanghao Chen
The self-forming dynamic membrane bioreactor (SFDMBR) is a biological wastewater treatment technology based on the conventional membrane bioreactor (MBR) with membrane material modification to a large pore size (30-100 μm). This modification requires a dynamic layer formed by activated sludge to provide effective filtration function for high-quality permeate production. The properties of the dynamic layer are therefore important for permeate quality in SFDMBRs. The interaction between the structure of the dynamic layer and the performance of SFDMBRs is little known but understandably complex...
April 18, 2018: Water Research
Jerosha Ifthikar, Xiang Jiao, Audrey Ngambia, Ting Wang, Aimal Khan, Ali Jawad, Qiang Xue, Lei Liu, Zhuqi Chen
In this paper, sewage sludge, a solid waste from wastewater treatment plant, which eagerly requires proper treatment was reused as solid support in the form of sewage sludge biochar, then modified with carboxymethyl chitosan to form a bio-adsorbent. Further, carboxymethyl chitosan coating on sewage sludge biochar improved carboxymethyl chitosan's stability in water. The prepared bio-adsorbent revealed a shorter equilibrium time (<60 min) for Pb(II) adsorption and a superior capacity of 594.17 mg g-1 for Hg(II) adsorption, which are so far the best recorded performance achieved for chitosan based adsorbents...
April 14, 2018: Bioresource Technology
Qian Hu, Jiaji Sun, Dezhi Sun, Lan Tian, Yanan Ji, Bin Qiu
Wastewater containing toxic hexavalent chromium (Cr(VI)) were treated with well-organized anaerobic granular sludge in this study. Results showed that the anaerobic granular sludge rapidly removed Cr(VI), and 2000 µg·L-1 Cr(VI) was completely eliminated within 6 min, which was much faster than the reported duration of removal by reported artificial materials. Sucrose added as a carbon source acted as an initial electron donor to reduce Cr(VI) to Cr(III). This process was considered as the main mechanism of Cr(VI) removal...
April 16, 2018: Bioresource Technology
Natalie P Bonvino, Julia Liang, Elizabeth D McCord, Elena Zafiris, Natalia Benetti, Nancy B Ray, Andrew Hung, Dimitrios Boskou, Tom C Karagiannis
Accumulated epidemiological, clinical and experimental evidence has indicated the beneficial health effects of the Mediterranean diet, which is typified by the consumption of virgin olive oil (VOO) as a main source of dietary fat. At the cellular level, compounds derived from various olive (Olea europaea), matrices, have demonstrated potent antioxidant and anti-inflammatory effects, which are thought to account, at least in part, for their biological effects. Research efforts are expanding into the characterization of compounds derived from Olea europaea, however, the considerable diversity and complexity of the vast array of chemical compounds have made their precise identification and quantification challenging...
January 1, 2018: Database: the Journal of Biological Databases and Curation
Gang Gao, Heping Xiong, Jikang Chen, Kunmei Chen, Ping Chen, Chunming Yu, Aiguo Zhu
By using a hydroponic culture system, the terrestrial fiber crop ramie can growth optimally in aquatic environment and enhance exponentially quantities of high quality seedlings for subsequent field cultivation. In this study, the survival rate of ramie seedling was more than 97% when cultured using the novel hydroponic method. Further physiological analysis of the hydroponic ramie to different concentration of livestock wastewater demonstrated that all of these ramies can survival in livestock wastewater, but the 4 times diluted livestock wastewater (total N: 100...
May 12, 2018: International Journal of Phytoremediation
Tao Huang, Longfei Liu, Junjun Tao, Lulu Zhou, Shuwen Zhang
The emission of the source effluent of azo dyes has resulted in a serial of environmental problems including of the direct damage of the natural esthetics, the inhibition of the oxygen exchange, the shortage of the photosynthesis, and the reduction of the aquatic flora and fauna. A bioelectrochemical platform (3D-EF-MFCs) combining two-chamber microbial fuel cells and three dimensional electro-Fenton technique were delicately designed and assembled to explore the decolorization, bio-genericity performance of the methyl orange, and the possible biotic-abiotic degradation mechanisms...
April 23, 2018: Environmental Science and Pollution Research International
Salam A Mohammed, Lamya Al Amouri, Emad Yousif, Ali Abd Ali, Fazal Mabood, Hazim F Abbas, Sausan Alyaqoobi
Vanadium oxide has been largely exploited as a catalyst in many industrial applications. In this article, we show the synthesis of vanadium oxide (V2 O5 ): Nickel Oxide (NiO) composite using sol-gel method at optimum conditions. The composite nanomaterials were used to remove methyl orange from waste water via harnessing the photocatalytic activity of it which showed an excellent efficiency of removal at 88%, and 93% after the exposure to the light, and light with heating respectively. This will pave the way into further implementation of these nanomaterials in the removal of some other dyes and contaminants from wastewater...
March 2018: Heliyon
Xu Zhou, Lei Gao, Hai Zhang, Haiming Wu
Nitrogen removal in vertical flow constructed wetlands (VFCWs) is still a key problem especially for treating low C/N wastewaters. In this study, nitrogen removal and nitrous oxide (N2 O) emission in biochar-amended aerated VFCWs were evaluated under the varying intermittent aeration (different aeration times and aeration rates). The results indicated that the optimal aeration time and rate were 2 h d-1 and 0.6 L min-1 , which could create alternant of aerobic and anaerobic conditions for the simultaneous nitrification and denitrification in VFCWs...
April 10, 2018: Bioresource Technology
Ehsan Elahi, Muhammad Abid, Huiming Zhang, Weijun Cui, Shabeh Ul Hasson
Given the shortage and non-availability of freshwater in Pakistan, wastewater is being used for bathing water buffaloes; however, this has a negative impact on animal welfare. Although there is a vast literature on indirect linkages between wastewater and animal productivity, studies focusing on the direct impacts of water buffaloes bathing in wastewater on animal productivity and economic losses are rare. Therefore, using 360 domestic water buffalo farms, this study examines the expenditure and production losses associated with bathing (in wastewater and freshwater) and non-bathing water buffaloes by employing partial budgeting and resource adjustment component techniques...
June 1, 2018: Preventive Veterinary Medicine
Konstantinos Moustakas, Petros Gikas, Simos Malamis, Ezio Ranieri
No abstract text is available yet for this article.
June 15, 2018: Journal of Environmental Management
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