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1TiO_(2) Nanocrystals Grown on Graphene as Advanced Photocatalytic Hybrid Materials显示文摘A graphene/TiO_(2) nanocrystals hybrid has been successfully prepared by directly growing TiO_(2) nanocrystals on graphene oxide(GO)sheets.The direct growth of the nanocrystals on GO sheets was achieved by a two-step method,in which TiO_(2) was first coated on GO sheets by hydrolysis and crystallized into anatase nanocrystals by hydrothermal treatment in the second step.Slow hydrolysis induced by the use of EtOH/H2O mixed solvent and addition of H2SO4 facilitates the selective growth of TiO_(2) on GO and suppresses growth of free TiO_(2) in solution.The method offers easy access to the GO/TiO_(2) nanocrystals hybrid with a uniform coating and strong interactions between TiO_(2) and the underlying GO sheets.The strong coupling gives advanced hybrid materials with various applications including photocatalysis.The prepared graphene/TiO_(2) nanocrystals hybrid has superior photocatalytic activity to other TiO_(2) materials in the degradation of rhodamine B,showing an impressive three-fold photocatalytic enhancement over P25.It is expected that the hybrid material could also be promising for various other applications including lithium ion batteries,where strong electrical coupling to TiO_(2) nanoparticles is essential.Yongye Liang Hailiang Wang Hernan Sanchez Casalongue Zhuo Chen Hongjie Dai 2010Nano Research2010,3,10:57
2Advanced Asymmetrical Supercapacitors Based on Graphene Hybrid Materials显示文摘Supercapacitors 在水的答案操作是有能力的高骑车稳定性并且快收费并且排出的低费用精力存储设备,但是通常受不了低精力密度。这里,我们种 Ni (哦) 高质量的 graphene 表上的 2 nanoplates 和 RuO2 nanoparticles 以便最大化这些材料的特定的电容。我们然后在 Ni 上面配对(哦) 有一个 RuO2/graphene 电极到的 2/graphene 电极负担得起高效有在 1.5 V 的电压在水的答案操作的高精力和功率密度的不均匀的 supercapacitor。不均匀的 supercapacitor 基于 RuO2 碳或 Ni 比对称的 RuO2-RuO2 supercapacitors 或不均匀的 supercapacitors 展出显著地更高的精力密度(哦)2 碳电极对。48 W 甠瑬慲散瑮楲畦慧楴湯的高精力密度?Hailiang Wang Yongye Liang Tissaphern Mirfakhrai Zhuo Chen Hernan Sanchez Casalongue Hongjie Dai 2011Nano Research2011,4,8:37
3RNA-Directed DNA Methylation Is Involved in Regulating Photoperiod-Sensitive Male Sterility in Rice显示文摘光周期敏感的男绝育(PSMS ) 是为混合米饭繁殖的珍贵 germplasm。最近,我们克隆 pms3,控制 PSMS 的一个地点,它编码称为在长天的条件下面为米饭植物的正常男富饶要求的 LDMAR 的长非编码的 RNA。在在 PSMS 米饭(Nongken 58S ) 相对的 LDMAR 的倡导者的增加的 methylation 野类型(Nongken 58 ) 减少了在长天的条件下面导致男绝育的 LDMAR 的表示。在这研究,我们鉴别 siRNA 在比在 Nongken 58 更充满 Nongken 58S 的 LDMAR 倡导者区域说出 PsiLDMAR。我们证明 PsiLDMAR 多半从 AK111270 被导出,与它让 110 底与 LDMAR 的 5 结束重叠的 3 结束从 LDMAR 倡导者的感觉海滨获得的一个抄本。在 Nongken 58S 的 Overexpressing AK111270 极大地充实 PsiLDMAR,它在 LDMAR 倡导者导致了指导 RNA 的 DNA methylation 并且镇压 LDMAR 的表示。在 Nongken 58S 的 LDMAR 的减小为富饶恢复改变了批评的天长度并且在短天的条件下面推迟了富饶恢复。这结果为 PSMS 增加了我们分子的机制的理解。Jihua Ding Jianqiang Shen Hailiang Mao Weibo Xie Xianghua Li Qifa Zhang 2012Molecular Plant2012,5,6:33
4High Performance In Vivo Near-IR (>1 μm) Imaging and Photothermal Cancer Therapy with Carbon Nanotubes显示文摘Short single-walled carbon nanotubes(SWNTs)functionalized by PEGylated phospholipids are biologically non-toxic and long-circulating nanomaterials with intrinsic near infrared photoluminescence(NIR PL),characteristic Raman spectra,and strong optical absorbance in the near infrared(NIR).This work demonstrates the first dual application of intravenously injected SWNTs as photoluminescent agents for in vivo tumor imaging in the 1.0-1.4μm emission region and as NIR absorbers and heaters at 808 nm for photothermal tumor elimination at the lowest injected dose(70μg of SWNT/mouse,equivalent to 3.6 mg/kg)and laser irradiation power(0.6 W/cm2)reported to date.Ex vivo resonance Raman imaging revealed the SWNT distribution within tumors at a high spatial resolution.Complete tumor elimination was achieved for large numbers of photothermally treated mice without any toxic side effects after more than six months post-treatment.Further,side-by-side experiments were carried out to compare the performance of SWNTs and gold nanorods(AuNRs)at an injected dose of 700μg of AuNR/mouse(equivalent to 35 mg/kg)in NIR photothermal ablation of tumors in vivo.Highly effective tumor elimination with SWNTs was achieved at 10 times lower injected doses and lower irradiation powers than for AuNRs.These results suggest there are significant benefits of utilizing the intrinsic properties of biocompatible SWNTs for combined cancer imaging and therapy.Joshua T.Robinson Kevin Welsher Scott M.Tabakman Sarah P.Sherlock Hailiang Wang Richard Luong Hongjie Dai 2010Nano Research2010,3,11:20
5多边形铁素体的体积分数和大小对管线钢落锤撕裂性能的影响显示文摘在天然气管线脆性断裂止裂的研究中,由于落锤撕裂试验(Drop weight tear test,DWTT)采用了全板厚试样,其试验状态接近管道在实际情况下的应力应变状态,能充分显示管材断裂的真实状况及其止裂能力,所以,DWTT已经成为评价管线钢脆性断裂止裂能力的重要方法,并以试样的断口纤维率(Shear-area percentage,SA)大小作为衡量标准。在不同的工业生产条件下轧制X70管线钢,并对它们进行落锤撕裂试验、疲劳试验、拉伸试验及冲击试验,探讨X70管线钢显微组织中多边形铁素体体积分数和大小对DWTT断口纤维率的影响。研究结果表明,当多边形铁素体作为第二相存在时,断口纤维率随着多边形铁素体体积分数的增加呈现出先上升后下降的特点;当多边形铁素体作为主要基体组织存在时,断口纤维率主要受多边形铁素体晶粒大小的影响,并且晶粒越细断口纤维率越高。于庆波 孙莹 YU Hailiang 刘相华 2011机械工程学报2011,47,24:19
6Surface runoff processes and sustainable utilization of water resources in Manas River Basin, Xinjiang, China显示文摘Water is the important resource to guarantee the existence and development of oases in arid areas. To improve the utilization efficiency of water resources in Manas River Basin, this paper investigated the trends and periods of runoff based on the runoff and climate data for the past 50 years. Subsequently, with the socioeconomic and water resources data, we studied a comprehensive evaluation on the water security in this area. The results indicated that the stream flows in the three hydrological stations of Hongshanzui, Kensiwat and Bajiahu have significantly increased and undergone abrupt changes, with periods of 18 and 20 years. According to assessment, water security in the Manas River Basin was at an unsafe level in 2008. In criterion layer, the ecological security index and the index of supply-demand situation are both at the relatively secure level; the quantity index and socioeconomic index of water resources are at the unsafe level and basic security level, respectively. Therefore, in order to achieve sustainable economic and social development within the Manas River Basin, it is vital to take a series of effective measures to improve the status of water security.HongBo LING HaiLiang XU JinYi FU XinHua LIU 2012Journal of Arid Land2012,4,3:18
7青海湖底沉积物的矿物物相及有机质保存研究显示文摘盐湖沉积环境是烃源岩发育的重要地质环境。本文以青海湖湖底沉积物为例,根据有机质与粘土矿物含量及矿物表面积的关系,分析了矿物学因素对盐湖相富有机质沉积物中有机质保存的影响。研究发现:湖底沉积物中有机质丰富,为上层水中的浮游生物和由河流携带来的陆地高等植物两种来源。矿物物相分析发现沉积物中粘土矿物含量达到32.4%,以伊利石为主。沉积物经密度分离后测试发现,有机碳含量与粘土矿物含量及矿物表面积之间具有很好的正相关性,说明粘土矿物吸附是青海湖底沉积物中有机质的主要赋存形式。李善营 于炳松 Hailiang Dong 刘英超 2006岩石矿物学杂志2006,25,6:13
8Thermal entanglement in a mixed-spin Heisenberg XXZ model under a nonuniform external magnetic field显示文摘The thermal entanglement in (1/2,1) mixed-spin Heisenberg XXZ model is investigated under an external nonuniform magnetic field. In the uniform magnetic field system,the critical magnetic field Bc and critical temperature Tc are increased by increasing the anisotropic parameter k. The degree of magnetic field b plays an important role in improving the critical temperature and enlarging the region of entan-glement in the nonuniform magnetic field system.WANG Fei JIA HongHui ZHANG HaiLiang ZHANG XueAo CHANG ShengLi 2009Science China(Physics,Mechanics & Astronomy)2009,52,12:13
9Phosphorus oxoanion-intercalated layered double hydroxides for high-performance oxygen evolution显示文摘合理设计和为氧进化反应(OER ) 的有效、划算的电极的控制制造为探讨崭新的精力危机是批评的。有特定的夹层阴离子的镍铁分层的双氢氧化物(NiFe-LDHs )( 即磷酸盐,亚磷酸盐,和次磷酸盐) 被一个一起沉淀方法制作并且作为氧进化 electrocatalysts 调查了。磷 oxoanion 的置闰在一个碱的答案提高了 OER 活动;最佳的表演(即, 215 mV, 37.7 mV/dec 的一个小 Tafel 斜坡,和稳定的电气化学的行为的一个低发作潜力) 与设置次磷酸盐的 NiFe-LDH 催化剂被完成,在传统的设置碳酸盐的 NiFe-LDH 上的示威戏剧的改进以活动和耐久性。这提高的表演被归因于在设置的磷的 oxoanions 和分享边的瞬间 6 之间的相互作用(M = Ni, Fe ) 层,它修改表面 Ni 地点的电子结构。这个概念应该为更有效的基于 LDH 的氧进化 electrocatalysts 的设计是鼓舞人心的。Ma Luo Zhao Cai Cheng Wang Yongmin Bi Li Qian Yongchao Hao Li Li Yun Kuang Yaping Li Xiaodong Lei Ziyang HUO Wen Liu Hailiang Wang Xiaoming Sun Xue Duan 2017Nano Research2017,10,5:12
10Fine-Tuning of MiR528 Accumulation Modulates Flowering Time in Rice显示文摘In plants,microRNA (miRNA) functions in the post-transcriptional repression of target mRNAs have been well explored.However,the mechanisms regulating the accumulation of miRNAs remain poorly under.stood.Here,we report that distinct mechanisms regulate accumulation of a monocot-specific miRNA,rice (Oryza sativa) miR528.At the transcriptional level,miR528 accumulated to higher levels in older plants than in young seedlings and exhibited aging-modulated gradual accumulation and diurnal rhythms in leaves;at the post-transcriptional level,aging also modulated miR528 levels by enhancing pri-miR528 alter.native splicing.We found that miR528 promotes rice flowering under long-day conditions by targeting RED AND FAR-RED INSENSITIVE2 (OsRFI2).Moreover,natural variations in the MIR528 promoter region caused differences in miR528 expression among rice varieties,which are correlated with their different binding affinities with the transcription factor OsSPL9 that activates the expression of miR528.Taken together,our findings reveal rice plants have evolved sophisticated modes fine-tuning miR528 levels and provide insight into the mechanisms that regulate MIRNA expression in plants.Rongxin Yang Pingchuan Li Hailiang Mei Dong Wang Jing Sun Chao Yang Lili Hao Shouyun Cao Chengcai Chu Songnian Hu Xianwei Song Xiaofeng Cao 2019Molecular Plant2019,12,8:12
11Co-occurrence of nitrite-dependent anaerobic methane oxidizing and anaerobic ammonia oxidizing bacteria in two Qinghai-Tibetan saline lakes显示文摘亚硝酸根依赖者厌氧氧化甲烷(n-damo ) 氧化的细菌和厌氧的氨(anammox ) 细菌是涉及全球碳并且氮骑车的二组微生物。为了测试 n-damo 和 anammox 细菌是否在自然盐的环境, DNA 和 cDNA 共同发生,样品从二个盐的湖的地表的沉积获得了(与 32 和 84 g/L 的咸度,分别地)与 anammox-damo-specific 和 n-damo-specific 教材集合的使用在西藏的高原上是 放大PCR 的,由克隆图书馆建设和种系发生的分析列在后面。DNA 和基于 cDNA 的克隆与 n-damo 结盟了, anammox 细菌成功地从二件样品被检索,显示这些二组细菌能象 84 g/L 一样高在有咸度的自然盐的环境共同发生。我们发现在自然为我们全球碳和氮周期的理解有大含意[出版摘要]Jian YANG Hongchen JIANG Geng WU Weiguo HOU Yongjuan SUN Zhongping LAI Hailiang DONG 2012Frontiers of Earth Science2012,6,4:12
12Genome-Wide Analysis of the Sus Gene Family in Cotton显示文摘蔗糖 synthase (怀疑) 是在植物蔗糖新陈代谢的关键酶。在棉花,怀疑(EC 2.4.1.13 ) 是降级的主要的酶从种子上衣的韧皮部进口进棉花纤维的蔗糖。这研究示威了 Gossypium arboreum L. 的染色体, G。raimondii Ulbr,和 G。hirsutum L. ,包含了 8, 8,和 15 分别地怀疑基因。他们的结构的组织,种系发生的关系,和表示侧面被描绘。genomic 和编码序列的比较识别了哪个高度被保存在之间的多重 introns,数字和位置双并且 allotetraploid 棉花种类。大多数种系发生的 clades 从所有三种包含了序列,建议 tetraploid G 的 Sus 基因。hirsutum 它的双祖先源于那些。一个人怀疑组(怀疑我) 在棉花期间经历了扩大进化。表示分析显示大多数怀疑基因差别在各种各样的纸巾被表示并且在棉花纤维房间有发展依赖者表示侧面。一样的 orthologous 组的成员在所有三种有很类似的表示模式。这些结果提供新卓见进棉花的进化在纤维生长和开发期间怀疑基因家庭,和卓见进它的成员的生理的功能。Changsong Zou Cairui Lu Haihong Shang Xinrui Jing Hailiang Cheng Youping Zhang Guoli Song 2013Journal of Integrative Plant Biology2013,55,7:10
13Mechanical and thermal properties of sodium silicate treated moso bamboo particles reinforced PVC composites显示文摘The main objective of this research was to study the potential of sodium silicate modification on moso bamboo particles as reinforcements for thermoplastic. Moso bamboo particles were modified with sodium silicate aqueous solutions (of 0.5%, 1%, 2%, 5% and 10% concentrations). The mechanical properties of sodium silicate treated moso bamboo particles reinforced PVC composites (BPPC) were calculated and compared with raw bamboo particles filled samples. The thermal characteristics of the BPPC were studied to investigate the feasibility of sodium silicate treatment on moso bamboo particles. The particle morphology and BPPC microstructure were investigated by scanning electron microscopy. Results showed that the tensile strength and modulus of elasticity of the BPPC increased before the concentration of sodium silicate solution reached 5% and got their maximum values of 15.72 MPa and 2956.80 MPa, respectively at 5% concentration. The modulus of rupture obtained the maximum value of 27.73 MPa at 2% concentration. The mechanical curve decreased as the concentration of solution went higher. Differential scanning calorimetric analysis illustrated that the sodium silicate solution treated BPPC possesses a better compatibility. More uniform dispersion of moso bamboo particles in PVC matrix was obtained after the sodium silicate treatment. Hence, the sodium silicate was a feasible and competitive agent of creating moso bamboo particles reinforced PVC composites.WANG Hui, SHENG KuiChuan*, CHEN Jie, MAO HaiLiang & QIAN XiangQun School of Biosystems Engineering and Food Science,Zhejiang University, Hangzhou 310029, China 2010Science China(Technological Sciences)2010,53,11:9
14Microbial diversity in cold seep sediments from the northern South China Sea显示文摘华南海(SCS ) 是最大的西方的和平的边缘的海。然而,微生物引起的研究从来没在寒冷被执行过渗出在 SCS 的沉积。在 2004, SONNE 177 巡航发现二冷渗出有在北 SCS 的不同的水深度的区域。在水深度在 3000 m 附近的地方, Haiyang 4 区域已经为在 seafloor 上的活跃渗出被证实了,例如微生物引起的地席, authigenic 碳酸盐外壳和瓣鳃类。我们在从这感冒收集的一个 5.55-m 沉积核心调查了微生物引起的丰富和差异渗出区域。一条综合途径包括地球化学和 16S rRNA 基因被采用种系发生的分析。这里,我们证明与沉积核心的地球化学侧面一起的微生物引起的丰富和差异揭示了在硫酸盐减小和甲烷氧化之间的 a coupled 反应。直接计数结果显示出的氮蒽橘子那微生物引起的丰富从 105 ~ 106 cells/g 沉积(湿重量)。丰富的深度相关的变化显示出象甲烷集中侧面的一样的趋势。种系发生的分析显示了减少硫酸盐的细菌和厌氧的氧化甲烷的 archaea 的存在。差异在表面是高得多的,但是处于沉积的 geochemical 条件响应变化与深度严厉地减少了,例如甲烷,硫酸盐集中和全部的器官的碳。海洋的 Benthic 组 B, Chloroflexi 和 JS1 分别地是 archaeal 和细菌的图书馆的占优势的 phylotypes。Yong Zhang Xin Su Fang Chen Yuanyuan Wang Lu Jiao Hailiang Dong Yongyang Huang Hongchen Jiang 2012Geoscience Frontiers2012,3,3:9
15Transcriptome analysis reveals long noncoding RNAs involved in fiber development in cotton (Gossypium arboreum)显示文摘Long noncoding RNAs(lnc RNAs)play important roles in various biological regulatory processes in yeast,mammals,and plants.However,no systematic identification of lnc RNAs has been reported in Gossypium arboreum.In this study,the strand-specific RNA sequencing(ss RNA-seq)of samples from cotton fibers and leaves was performed,and lnc RNAs involved in fiber initiation and elongation processes were systematically identified and analyzed.We identified 5,996 lnc RNAs,of which 3,510 and 2,486 can be classified as long intergenic noncoding RNAs(linc RNAs)and natural antisense transcripts(lnc NAT),respectively.Linc RNAs and lnc NATs are similar in many aspects,but have some differences in exon number,exon length,and transcript length.Expression analysis revealed that 51.9%of linc RNAs and 54.5%of lnc NATs transcripts were preferentially expressed at one stage of fiber development,and were significantly highly expressed than protein-coding transcripts(21.7%).During the fiber and rapid elongation stages,rapid and dynamic changes in lnc RNAs may contribute to fiber development in cotton.This work describes a set of lnc RNAs that are involved in fiber development.The characterization and expression analysis of lnc RNAs will facilitate future studies on their roles in fiber development in cotton.Changsong Zou Qiaolian Wang Cairui Lu Wencui Yang Youping Zhang Hailiang Cheng Xiaoxu Feng Mtawa Andrew Prosper Guoli Song 2016Science China(Life Sciences)2016,59,2:9
16GABAergic Abnormalities Associated with Sensorimotor Corticostriatal Community Structural Deficits in ErbB4 Knockout Mice and First-Episode Treatment-Naive Patients with Schizophrenia显示文摘The current study was designed to explore how disruption of specific molecular circuits in the cerebral cortex may cause sensorimotor cortico-striatal community structure deficits in both a mouse model and patients with schizophrenia.We used prepulse inhibition(PPI)and brain structural and diffusion MRI scans in 23 mice with conditional ErbB4 knockout in parvalbumin interneurons and 27 matched controls.Quantitative real-time PCR was used to assess the differential levels of GABA-related transcripts in brain regions.Concurrently,we measured structural and diffusion MRI and the cumulative contribution of risk alleles in the GABA pathway genes in firstepisode treatment-naı¨ve schizophrenic patients(n=117)and in age-and sex-matched healthy controls(n=86).We present the first evidence of gray and white matter impairment of right sensorimotor cortico-striatal networks and reproduced the sensorimotor gating deficit in a mouse model of schizophrenia.Significant correlations between gray matter volumes(GMVs)in the somatosensory cortex and PPI as well as glutamate decarboxylase 1 mRNA expression were found in controls but not in knockout mice.Furthermore,these findings were confirmed in a human sample in which we found significantly decreased gray and white matter in sensorimotor cortico-striatal networks in schizophrenic patients.The psychiatric risk alleles of the GABA pathway also displayed a significant negative correlation with the GMVs of the somatosensory cortex in patients.Our study identified that ErbB4 ablation in parvalbumin interneurons induced GABAergic dysregulation,providing valuable mechanistic insights into the sensorimotor cortico-striatal community structure deficits associated with schizophrenia.Chengcheng Zhang Peiyan Ni Yikang Liu Yang Tian Jinxue Wei Bo Xiang Liansheng Zhao Xiaojing Li Xiaohong Ma Wei Deng Wanjun Guo Rongjun Ni Yamin Zhang Qiang Wang Hailiang Huang Nanyin Zhang Tao Li 2020Neuroscience Bulletin2020,36,2:9
17A data-driven threshold for wavelet sliding window denoising in mechanical fault detection显示文摘Wavelet denoising is an effective approach to extract fault features from strong background noise.It has been widely used in mechanical fault detection and shown excellent performance.However,traditional thresholds are not suitable for nonstationary signal denoising because they set universal thresholds for different wavelet coefficients.Therefore,a data-driven threshold strategy is proposed in this paper.First,the signal is decomposed into different subbands by wavelet transformation.Then a data-driven threshold is derived by estimating the noise power spectral density in different subbands.Since the data-driven threshold is dependent on the noise estimation and adapted to data,it is more robust and accurate for denoising than traditional thresholds.Meanwhile,sliding window method is adopted to set a flexible local threshold.When this method was applied to simulation signal and an inner race fault diagnostic case of dedusting fan bearing,the proposed method has good result and provides valuable advantages over traditional methods in the fault detection of rotating machines.CHEN YiMin ZI YanYang CAO HongRui HE ZhengJia SUN HaiLiang 2014Science China(Technological Sciences)2014,57,3:9
18NiMo/Al_2O_3 catalyst containing nano-sized zeolite Y for deep hydrodesulfurization and hydrodenitrogenation of diesel显示文摘Two mixed-matrix NiMo/Al2O3 catalysts containing nano-and micro-sized zeolite Y have been prepared to explore the size effect of zeolite Y particle on the hydrodesulfurization(HDS)and hydrodenitrogenation(HDN)activities of fluid catalytic cracking(FCC)diesel.They were characterized by SEM,BET,XRD,H2-TPR,NH3-TPD and HRTEM.The results show that the catalyst containing nano-sized zeolite Y possesses larger average pore diameter,higher pore volume,weaker and lesser acid sites,more easily reducible metal phases,shorter MoS2 slabs and more slab layers than the catalyst containing micro-sized zeolite Y.The catalysts were also evaluated with a high-pressure fixed-bed reactor using real FCC diesel as feed.The results display that the catalyst containing nano-sized zeolite Y bears higher HDS and HDN activities and exhibits higher relative rate constant for the removal of total sulfur or nitrogen than the one containing micro-sized zeolite.Hailiang Yin Tongna Zhou Yunqi Liu Yongming Chai Chenguang Liu 2011Journal of Natural Gas Chemistry2011,20,4:8
19The effect of salt stress on the chlorophyll level of the main sand-binding plants in the shelterbelt along the Tarim Desert Highway显示文摘Based on the fact that only high saline water irrigated to the shelterbelt along the Tarim Desert Highway, the experiment about three species with six degree of salinity was carried out to analyze the relation between chlorophyll content and salt stress. The results show that: (1) the chlorophyll content of tree species decreases with aggravating the salt stress, which explains that salt stress can affect chlorophyll accumulation of three plants; (2) from chlorophyll content with different salinity, the chlorophyll content of three shrubs also has twice obvious decrease, which indicates that some plants adapt to salt stress. We divided salt resistance of the plant into three grades, namely the slight salt resistance, the heavy salt resistance and the extreme salt resistance; and (3) according to the experimental results, the salt stress of each plant was divided, which can provide theoretical guidance for constructing the shelterbelt along the Tarim Desert Highway.XU XinWen XU HaiLiang WANG YanLing WANG XiaoJing QIU YongZhi XU Bo 2008Chinese Science Bulletin2008,53,S2:7
20Iron and lead ion adsorption by microbial flocculants in synthetic wastewater and their related carbonate formation显示文摘Although microbial treatments of heavy metal ions in wastewater have been studied, the removal of these metals through incorporation into carbonate minerals has rarely been reported. To investigate the removal of Fe3+and Pb2+, two representative metals in wastewater, through the precipitation of carbonate minerals by a microbial flocculant(MBF) produced by Bacillus mucilaginosus. MBF was added to synthetic wastewater containing diferent Fe3+and Pb2+concentrations, and the extent of flocculation was analyzed. CO2 was bubbled into the mixture of MBF and Fe3+/Pb2+to initiate the reaction. The solid substrates were analyzed via X-ray difraction, transmission electron microscopy and energy dispersive spectroscopy. The results showed that the removal efciency decreased and the MBF adsorption capacity for metals increased with increasing heavy metal concentration. In the system containing MBF, metals(Fe3+ and Pb2+), and CO2, the concentrated metals adsorbed onto the MBF combined with the dissolved CO2, resulting in oversaturation of metal carbonate minerals to form iron carbonate and lead carbonates. These results may be used in designing a method in which microbes can be utilized to combine CO2 with wastewater heavy metals to form carbonates, with the aim of mitigating environmental problems.Minjie Yao Bin Lian Hailiang Dong Jianchao Hao Congqiang Liu 2013Journal of Environmental Sciences2013,25,12:7
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