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	1. Selective removal and recovery of Fe(III) by garlic residue gel adsorption
	Xue Jiehao,Zhang Yangzhong,Meng Yeping,Zhou Hongyu,Huang Ying,Liu Junyou,Yin YanLi,Huang Kai
	Environmental Science and Techology 31 October 2018
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (759K B)

	Abstract:Removal of iron in hydrometallurgical processes is a quite popular challenge, and the traditional methods such as precipitation may cause severe secondary pollution and resources waste. In present study, we attempted a cheap and effective technique to remove the iron ions by adsorption onto garlic residue gels. A simple chemical modification method to modify the peel by calcium hydroxide was proposed. Results showed that the optimal equilibrium pH is about 2.5 for 90 % adsorption without the hydrolysis of Fe(III). Adsorption equilibrium was attained within 60 min. The adsorption process can be described well by Langmuir model and pseudo-second-order kinetic equation, respectively. The maximum adsorption capacity for Fe(III) ions was found to be 1.4 mol/kg. The sulfenic acid, pectic acid, polyphenolic and alliin components contained in the garlic peel are inferred to be the main ligands responsible for the uptake of Fe(III) ions onto the gel. The simulated solutions referring to the hydrometallurgical process of nickel and copper were prepared to test the selective removal behavior of Fe(III), and the possibility of recovery and reuse of the adsorbed iron was also discussed. The present work may help to recycle and reuse the huge amount of iron resources in the real hydrometallurgical processes, and also bring a more ecofriendly, cleaner and shortened process for many traditional hydrometallurgical processes.
	TO cite this article:Xue Jiehao,Zhang Yangzhong,Meng Yeping, et al. Selective removal and recovery of Fe(III) by garlic residue gel adsorption[OL].[31 October 2018] http://en.paper.edu.cn/en_releasepaper/content/4746268


	2. Removal of uranium from aqueous solution by graphene oxide
	YU Jing,WANG Jianlong
	Environmental Science and Techology 29 April 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:In this paper, the adsorption of uranium by graphene oxide was investigated. The effect of pH, contact time, concentration of uranium and temperature on the adsorption capacity of uranium was determined. The graphene oxide (GO) was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and infrared spectra (FTIR). FTIR spectra indicated that carboxyl and alkoxy groups existed on the surface of GO, which involved in uranium adsorption. The adsorption kinetics of U(VI) followed pseudo first-order kinetic model. The adsorption isotherm conformed to Tempkin model. The adsorption process is spontaneous and exothermic.
	TO cite this article:YU Jing,WANG Jianlong. Removal of uranium from aqueous solution by graphene oxide[OL].[29 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4730928


	3. Efficiency assessment and optimization of the sulfite/UV process for reductive dehalogenation
	TENG Long,XIE Bihuang,LI Xuchun
	Environmental Science and Techology 09 September 2016
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	Abstract:The sulfite/UV process is an promising alternative to remediation of a wide variety of recalcitrant contaminants such as halogenated organic compounds by producing powerfully reducing species, hydrated electron (eaqˉ). This study was intended to assess the efficiency of the process and to optimize the system. Selecting monochloroacetic acid (MCAA) as the simple model compound, energy efficiency of the reductive dehalogenation by the process was assessed based on the degradation kinetics of MCAA. The energy efficiency was analyzed by taking into account both of the electric energy input and chemicals consumption. The energy efficiency generally increased with increasing UV dose while showing a parabolic profile with respect to S(IV) dosage. Thus, the process could be optimized by controlling UV dose and S(IV) dosage in tandem, and several optimization approaches were also proposed and discussed. The process still shows effects in reducing MCAA in the realistic surface water, and the efficiency EE/O for reductive dehalogenation was estimated to be about18.6 kWh m-3 order-1 by the sulfite/UV process, suggesting that the process was efficient and promising in destroying many recalcitrant contaminants.
	TO cite this article:TENG Long,XIE Bihuang,LI Xuchun. Efficiency assessment and optimization of the sulfite/UV process for reductive dehalogenation[OL].[ 9 September 2016] http://en.paper.edu.cn/en_releasepaper/content/4704345


	4. The Effect of Degree of Sulfonation of Sulfonated Poly(arylene ether sulfone) Membranes on the Microbial Fuel Cell Performance
	Bi Huiping,Ran Dongqin,Hu Zhaoxia,Chen Shouwen
	Environmental Science and Techology 03 June 2016
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	Abstract:A series of sulfonated poly(arylene ether sulfone) (SPAES) membranes with different of degree of sulfonation (DS) are prepared for microbial fuel cell (MFC) applications. The performance of the MFCs equipped with SPAES membranes is investigated in details. During the start-up stage, the need time of reaching stable state and maximum anodic potential for the MFCs decreases with the increase of DS of the SPAES membranes. However, the power density of MFCs with SPAES(5-5), SPAES(4-6), SPAES(3-7) is very close after 14 days, which should be resulted from the combining effects of the exchange of H+ to Na+ in the SPAES membrane and the fouling of the membranes. The DS affects the anti-fouling activity of SPAES membranes, and higher DS leads to lower anti-fouling activity. The MFC equipped with SPAES(3-7) membrane (DS=30%, IEC=1.31 mmol g-1) is considered the better choice for the long-term operation.
	TO cite this article:Bi Huiping,Ran Dongqin,Hu Zhaoxia, et al. The Effect of Degree of Sulfonation of Sulfonated Poly(arylene ether sulfone) Membranes on the Microbial Fuel Cell Performance[OL].[ 3 June 2016] http://en.paper.edu.cn/en_releasepaper/content/4695751


	5. Metagenomic analysis and comparison of microbial community structure of aerobic activated sludge and anaerobic digestion sludge
	GUO Jianhua,PENG Yongzhen
	Environmental Science and Techology 21 May 2016
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	Abstract:Aerobic activated sludge and anaerobic digestion sludge contain highly complex microbial communities, which play a crucial role in both wastewater treatment and sludge management. Although the responsible microbes have been intensively studied, in communities of high complexity, conventional approaches based on 16S rRNA cannot completely reveal the whole microbial community structure. The metagenomic sequencing was applied to characterize and compare microbial community structure of aerobic activated sludge and anaerobic digestion sludge from a full-scale municipal wastewater treatment plant. Over 3.0 gigabases of metagenomic sequence data were generated with the Illumina HiSeq 2000 platform for each sample. Taxonomic analysis by MG-RAST sever indicated bacteria were dominant in both samples, while archaea with a higher abundance were detected in the anaerobic digestion sludge. The aerobic activated sludge was dominated by Proteobacteria, Bacteroidetes, Nitrospirae, and Actinobacteria, while the most abundant bacterial populations were Proteobacteria, Firmicutes, Bacteroidetes, and Actinobacteria in anaerobic digestion sludge. Key microorganisms and nitrogen metabolism in aerobic activated sludge and key microorganisms and pathways involved in methanogenesis were further revealed. Ammonia-oxidizing bacteria (AOB) distinctly dominate over ammonia-oxidizing archaea (AOA) in activated sludge. Denitrification, rather than anammox, is the major pathway to complete nitrogen removal. Meanwhile, the dominant proliferation of Methanosaeta and Methanosarcina, together with the functional affiliation of enzymes-encoding genes (Ack, PTA and ACSS) suggested an acetoclastic methanogenesis is the dominant methanogenesis pathway in anaerobic digester.
	TO cite this article:GUO Jianhua,PENG Yongzhen. Metagenomic analysis and comparison of microbial community structure of aerobic activated sludge and anaerobic digestion sludge[OL].[21 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4693657


	6. Kinetics and microbial community analysis of sludge anaerobic digestion based on Micro-direct current treatment under different initial pH values
	Yuan Haiping
	Environmental Science and Techology 19 May 2016
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (4K B)

	Abstract:The effects of Micro-direct current treatment (Micro-DC) on anaerobic digestion of sludge under different initial pH values were investigated in this study. Biogas production and VS removal rate tests were conducted to determine the optimum initial pH value based on the Micro-DC treatment, and the evolution of archaeal community was also investigated through high-throughput sequencing method to reveal its mechanism. Furthermore, First-order kinetics, Transfer function model and Cone model were employed to reveal the principle kinetics of methane production from waste activated sludge (WAS). The results showed that the optimum initial pH was 9.0 with the Micro-DC treatment of 0.6 V, with which the methane production could be greatly upgraded with a value of 224 mL CH4/g-VS as well as a VS removal rate of 38.07% after 32 days digestion. Micro-DC treatment with an initial pH value of 9.0 enhanced the microbial activities and avoided the accumulation of volatile fatty acids (VFAs) and free ammonia ([NH3]) and subsequent inhibition, inducing a stable digestion environment. The archaeal community analysis showed that Methanosaeta dominated in the treatments with initial pH values between 5.0 and 9.0, while they were Methanobacterium and Methanoculleus in the treatments at initial pH values of 3 and 11, respectively. Model simulation presented that the Cone model fitted the experiment data better and the calculated parameters indicated that anaerobic digestion of slud

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