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Bioleaching of vanadium from stone coal vanadium ore by Bacillus mucilaginosus:Influencing factors and mechanism

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1828-1838页

作者： yingbo dong Jinyu Zan Hai Lin School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants Beijing 100083China

Vanadium and its derivatives are used in various industries,including steel,metallurgy,pharmaceuticals,and aerospace *** China has massive reserves of stone coal resources,these resources have low ***,the effective extraction and recovery of metallic vanadium from stone coal is an important way to realize the efficient resource utilization of stone coal vanadium ***,Bacillus mucilaginosus was selected as the leaching *** vanadium leaching rate reached 35.5%after 20 d of bioleaching under optimal operating *** cumulative vanadium leaching rate in the contact group reached 35.5%,which was higher than that in the noncontact group(9.3%).The metabolites of ***,such as oxalic,tartaric,citric,and malic acids,dominated in bioleaching,accounting for 73.8%of the vanadium leaching ***,during leaching,the presence of stone coal stimulated the expression of carbonic anhydrase in bacterial cells,and enzyme activity increased by 1.335-1.905 *** activity positively promoted the production of metabolite organic acids,and total organic acid content increased by 39.31 mg·L^(-1),resulting in a reduction of 2.51 in the pH of the leaching system with stone *** effect favored the leaching of vanadium from stone *** force microscopy illustrated that bacterial leaching exacerbated corrosion on the surface of stone coal beyond 10 *** study provides a clear and promising strategy for exploring the bioleaching mechanism from the perspective of microbial enzyme activity and metabolites.

关键词： Bacillus mucilaginosus stone coal vanadium ore bioleaching carbonic anhydrase organic acids

Comprehensive study on the spatial distribution of heavy metals and their environmental risks in high-sulfur coal gangue dumps in China

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Journal of Environmental Sciences 2024年第2期136卷 486-497页

作者： yingbo dong Huan Lu Hai Lin School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants Beijing 100083China

The accumulation of coal gangue(CG)from coal mining is an important source of heavy metals(HMs)in *** spatial distribution and environment risk assessment are extremely important for the management and remediation of *** soil samples were collected from the high-sulfur CG site in northern China and analyzed for six *** results showed that the soil was heavily contaminated by Mn,Cr and Ni based on the Nemerow index,and posed seriously ecological risk depended on the geo-accumulation index,potential ecological risk index and risk assessment *** semi-variogram model and ordinary kriging interpolation accurately portrayed the spatial distribution of ***,Mn,and Cr were distributed by band diffusion,Ni was distributed by core,the distribution of Cu had obvious patchiness and Zn was more *** spatial autocorrelation indicated that all HMs had strong spatial *** BCR sequential extraction was employed to qualify the geochemical fractions of *** data indicated that Fe and Cr were dominated by residual fraction;Cu,Ni and Zn were dominated by reducible and oxidizable fractions;Mn was dominated by reducible and acid-extractable(25.38%-44.67%)*** correlation analysis showed that pH was the main control factor affecting the non-residue fractions of ***,acid production from high sulfur CG reduced soil pH by 2-3,which indirectly promoted the activity of ***,the conceptual model of HMs contamination at the CG site was proposed,which can be useful for the development of ecological remediation strategies.

关键词： High-sulfur coal gangue Soil contamination Heavy metals Spatial distribution Geochemical fractions Risk assessment

Insight into modified biochars and their immobilizing effects on heavy metal(loid)s in contaminated soils: Mechanisms and influencing factors

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Pedosphere 2023年第1期33卷 23-33页

作者： Ehma Rose GUERET YADIBERET MENZEMBERE Yinhai HE yingbo dong Bing LI Chenjing LIU Hai LIN Lengue SAMBIANI School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory on Resource-Oriented Treatment of Industrial Pollutants Beijing 100083China University of International Business and Economics Beijing 100029China

Soil contamination by heavy metal(loid)s is a considerable environmental concern,and immobilization is a promising way to reduce *** recent years,modified/engineered biochars have gained enormous attention for their use in soil remediation,and various studies have reported notable results from their application and their ability to immobilize heavy metal(loid)*** this review,a summary of publications on the utilization of modified biochars is presented to address the heavy metal(loid)threat in *** modified/engineered biochars were described from the review of relevant *** causes great changes in biochar surface chemistry,such as increases in pore volume,surface functional groups,and metal binding sites,which can be observed through various analytical techniques,including Brunauer-Emmett-Teller,X-ray photoelectron spectroscopy,X-ray diffraction,Fourier transform infrared spectroscopy,and *** analytical approaches elucidate immobilization mechanisms of adsorption,precipitation,surface complexation,and cation exchange between biochar and metal(loid)*** addition,the performance of biochar in remediating heavy metal(loid)s also leads to considerable improvements in soil ***,many factors that influence metal(loid)immobilization by biochar in soil,such as pH,redox potential,microorganisms,and climate regime,are ***,this paper emphasizes that using modified biochars as an immobilizing agent for remediation of heavy metal(loid)-polluted soils is promising and would be practicable if a comprehensive mechanism of their long-term stability in soil is well elucidated.

关键词： amendment immobilization pollutant strategy surface chemistry

粒度对石煤钒矿废石重金属静态淋溶的影响规律

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稀有金属 2017年第6期41卷 693-700页

作者：林海李洁董颖博北京科技大学能源与环境工程学院北京100083 工业典型污染物资源化处理北京市重点实验室北京100083

石煤钒矿开采过程中的大量废石,由于露天堆放而导致周边环境产生重金属污染。以湖北某地石煤钒矿废石为研究对象,通过进行实验室静态淋溶试验发现,淋出液中V,Pb,Cd,Cr,As溶出量随粒度的增加而降低,最高溶出量分别为7695.00,1266.00,19.1... 详细信息

石煤钒矿开采过程中的大量废石,由于露天堆放而导致周边环境产生重金属污染。以湖北某地石煤钒矿废石为研究对象,通过进行实验室静态淋溶试验发现,淋出液中V,Pb,Cd,Cr,As溶出量随粒度的增加而降低,最高溶出量分别为7695.00,1266.00,19.10,777.70,163.10μg·kg^(-1),重金属溶出率分别达到0.23%,11.71%,0.18%,0.12%,1.00%。研究发现,淋出液p H值对重金属溶出量影响较大,高p H值会使重金属沉淀吸附于废石表面,从而降低淋出液中重金属浓度,对环境污染程度较低。石煤钒矿废石的淋溶过程按淋出液p H变化规律可分为4个阶段,分析各阶段主要反应为:碱性矿物溶解和H+与基本阳离子交换作用、硫铁矿等还原性矿物氧化产酸作用、硅酸盐矿物的风化作用和金属元素的吸附沉淀作用。

关键词：石煤钒矿废石粒度重金属淋溶规律

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柠檬酸改性酒糟对重金属镉的吸附性能

东南大学学报（自然科学版） 2016年第1期46卷 165-170页

作者：董颖博林海王亮北京科技大学环境工程系北京100083 北京科技大学工业典型污染物资源化处理北京市重点实验室北京100083

通过柠檬酸对酒糟改性后制备出改性酒糟,系统研究了改性酒糟对水溶液中重金属Cd的吸附性能.研究发现,质量浓度0.5%的柠檬酸改性酒糟对Cd^(2+)的吸附量由改性前的4.09 mg/g提高到9.13 mg/g;酒糟改性后比表面积增大,微孔容积增加,且电负... 详细信息

通过柠檬酸对酒糟改性后制备出改性酒糟,系统研究了改性酒糟对水溶液中重金属Cd的吸附性能.研究发现,质量浓度0.5%的柠檬酸改性酒糟对Cd^(2+)的吸附量由改性前的4.09 mg/g提高到9.13 mg/g;酒糟改性后比表面积增大,微孔容积增加,且电负性增强.红外光谱分析表明,经过柠檬酸改性后酒糟有效官能团数目增多.改性酒糟对Cd^(2+)的吸附量随p H值的升高先增加后略有降低,在2 h时达到吸附平衡,吸附饱和后随震荡时间的延长,Cd^(2+)析出量很小.当p H值为6、初始Cd浓度为100 mg/L、改性酒糟投加量为10 g/L、吸附120 min时,改性酒糟对Cd^(2+)的去除率达到91.50%,吸附量为9.15 mg/g.吸附等温线研究表明,Langmuir模型能更好地描述改性酒糟对Cd^(2+)的吸附过程.

关键词：重金属改性酒糟镉离子吸附性能

黄药类捕收剂对嗜酸氧化亚铁硫杆菌的毒害机理

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化工学报 2012年第6期63卷 1883-1887页

作者：董颖博林海温子龙金属矿山高效开采与安全教育部重点实验室北京科技大学土木与环境工程学院北京100083

引言随着微生物技术的发展及在矿物加工工程领域内的应用,生物浸矿技术越来越受到重视,国内外在这一领域的研究近年来突飞猛进,从浸矿用微生物的选育、

关键词：嗜酸氧化亚铁硫杆菌黄药类捕收剂毒害机理吸附作用

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高含盐难降解化工污水混合菌群培养驯化方法

化工学报 2010年第12期61卷 3272-3278页

作者：林海于昕蕾董颖博北京科技大学环境工程系北京100083

以提高菌种降解性能和耐盐性能为目的,系统研究了高含盐难降解化工污水混合菌群的不同培养驯化方法。菌群适应难降解物质驯化实验表明,如果以CODCr去除率最高为目标,应选择异步培养驯化法,其CODCr去除率为72.0%,远远高于同步培养驯化法... 详细信息

以提高菌种降解性能和耐盐性能为目的,系统研究了高含盐难降解化工污水混合菌群的不同培养驯化方法。菌群适应难降解物质驯化实验表明,如果以CODCr去除率最高为目标,应选择异步培养驯化法,其CODCr去除率为72.0%,远远高于同步培养驯化法;如果以培养驯化药剂成本最低为目标,应选择同步培养驯化法中的CODCr负荷提升法,药剂成本仅为5.78CNY.(t水)-1;如果以驯化时间最短为目标,应选择同步培养驯化法中高CODCr负荷法,其驯化时间最短,为17d。菌群耐高盐驯化实验表明,NaCl浓度从50g.L-1以2g.L-1的梯度增加到60g.L-1,经过20d驯化,混合菌群完全适应了NaCl为60g.L-1的高盐环境,同时CODCr去除率略有提高。扫描电镜观察耐盐驯化前后细菌形态的变化,结果表明,驯化前,混合菌群主要由短杆菌、球状菌组成,细胞大小均一,表面光滑;驯化后混合菌群主要由长杆菌组成,细胞表面粗糙,并且出现大量分泌物,分泌物为混合菌群适应高盐环境的结果。

关键词：高含盐难降解化工污水菌种驯化扫描电镜

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化学改性对沸石去除水中碳、氮污染物的影响

四川大学学报（工程科学版） 2015年第3期47卷 193-199页

作者：董颖博林海刘泉利北京科技大学土木与环境工程学院北京100083

为提高沸石对水中多种污染物的去除效果,以水溶液中低浓度氨氮、硝态氮和有机物为研究对象,重点研究了乙酸、柠檬酸、柠檬酸钠、十二烷基磺酸钠(SDS)、氯化钠、十六烷基三甲基溴化铵(HDTMA)6种不同无机\有机化学改性剂对沸石去除氨氮、... 详细信息

为提高沸石对水中多种污染物的去除效果,以水溶液中低浓度氨氮、硝态氮和有机物为研究对象,重点研究了乙酸、柠檬酸、柠檬酸钠、十二烷基磺酸钠(SDS)、氯化钠、十六烷基三甲基溴化铵(HDTMA)6种不同无机\有机化学改性剂对沸石去除氨氮、硝态氮、COD的影响。研究表明,对低浓度氨氮去除效果最好的为柠檬酸钠改性沸石,最佳浓度为0.05 mol/L,去除率为98.14%;对低浓度硝态氮去除效果最好的为HDTMA改性沸石,最佳浓度为0.05 mol/L,去除率为24.81%;对低浓度COD去除效果最好的为柠檬酸改性沸石,最佳浓度为0.05 mol/L,去除率为42.57%,且改性沸石阳离子交换容量的大小与其对氨氮的去除率呈正相关。同时得出了不同改性剂对沸石去除氨氮、硝态氮、COD的影响规律,并发现柠檬酸钠改性沸石同步去除水溶液中低浓度氨氮、硝态氮和COD的效果远高于原天然沸石。

关键词：天然沸石化学改性氨氮硝态氮化学需氧量

氢氧化钠预处理和盐热复合改性对沸石氨氮吸附性能的影响

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硅酸盐学报 2017年第2期45卷 303-311页

作者：杨炳飞林海董颖博北京科技大学能源与环境工程学院北京100083 河北地质大学宝石与材料工艺学院石家庄050031

对天然斜发沸石进行碱液预处理、盐热复合改性,并进行挤压制粒,研究了改性及制粒对斜发沸石氨氮吸附性能的影响。结果表明:天然斜发沸石经1.0 mol/L NaOH溶液预处理2 h,再经2.0 mol/L NaCl溶液处理2 h及400℃焙烧热处理0.5 h后,氨氮去... 详细信息

对天然斜发沸石进行碱液预处理、盐热复合改性,并进行挤压制粒,研究了改性及制粒对斜发沸石氨氮吸附性能的影响。结果表明:天然斜发沸石经1.0 mol/L NaOH溶液预处理2 h,再经2.0 mol/L NaCl溶液处理2 h及400℃焙烧热处理0.5 h后,氨氮去除率从54.4%提高到98.3%。在复合改性后的沸石中添加6%硅酸钠黏结剂,经400℃热处理,制成粒径为?1.5 mm×2.5 mm的短柱状改性沸石颗粒,其氨氮去除率为83.3%,散失率为1.1%。采用NaCl+NaOH溶液作为再生剂,1次再生后氨氮去除率为75.2%,5次再生后,氨氮去除率为67.8%。改性沸石及其颗粒对氨氮吸附过程符合准二级反应动力学公式,属于化学吸附(离子交换)。沸石粉体及其颗粒对氨氮的吸附是以膜扩散和内扩散为共同控制步骤,为自发和吸热过程,温度升高,吸附量增加。另外,熵效应是吸附反应过程的主要驱动力。

关键词：沸石氢氧化钠盐热复合改性氨氮吸附