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Purified terephthalic acid wastewater biodegradation and toxicity

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Journal of environmental Sciences 2005年第5期17卷 876-880页

作者： ZHANG Xu-xiang WAN Yu-qiu cheng Shu-pei sun Shi-lei ZHU cheng-jun LI Wei-xin ZHANG Xiao-chun WANG Gui-lin LU Jian-hua LUO Xiang GU Ji-dong The state key laboratory of pollution control and resource reuse School of Environment Nanjing University Nanjing 210093 China yangtze Petrochemical Corporation Nanjing 210048 China Department of Ecology and Biodiversity The University of Hong Kong SAR China

The biodegradation and toxicity of the purified terephthalic acid（PTA） processing wastewater was researched at NJYZ pilot with the fusant strain Fhhh in the carrier activated sludge process（ CASP）. Sludge loading rate（SLR） for Fhhh to COD of the wastewater was 1.09 d^-1 and to PTA in the wastewater was 0.29 d^-1. The results of bioassay at the pilot and calculation with software Ebis3 showed that the 48h-LC50 （median lethal concentration） to Daphnia magna for the PTA concentration in the wastewater was only 1/10 of that for the chemical PTA. There were .5 kinds of benzoate pollutants and their toxicities existing in the wastewater at least. The toxicity parameter value of the pure chemical PTA cannot be used to predicate the PTA wastewater toxicity. The toxicity of the NJYZ PTA wastewater will be discussed in detail in this paper.

关键词： fusant strain purified terephthalic acid wastewater biodegradation toxicity software

Mechanisms of allicin exposure for the sludge fermentation enhancement:Focusing on the fermentation processes and microbial metabolic traits

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Journal of environmental Sciences 2022年第5期34卷 253-264页

作者： Feng Wang Jingyang Luo Shiyu Fang Wenxuan Huang Yunqi Zhang Le Zhang Xiaoshi cheng Wei Du Fang Fang Jiashun Cao yang Wu key laboratory of Integrated Regulation and resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of environment Hohai UniversityNanjing 210098China state key laboratory of pollution control and resource reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

As a frequently used product with antimicrobial activity,consumed allicin might be dis-charged and concentrated in waste-activated sludge(WAS).However,the influence of al-licin(as an exogenous pollutant)on WAS fermentation has not been clearly *** study aimed to disclose the impacts of allicin on volatile fatty acid(VFA)generation dur-ing WAS *** results showed that the appropriate presence of allicin(10 mg/g TSS)significantly enhanced the VFA yield(1894 versus 575 mg COD/L in the control)with increased acetate proportion(24.3%).Further exploration found that allicin promoted WAS solubilization,hydrolysis and acidification *** analysis revealed that the key genes involved in extracellular hydrolysis metabolism(i.e.,CAZymes),mem-brane transport(i.e.,gtsA and ytfT),substrate metabolism(i.e.,yhdR and pfkC)and fatty acid synthesis(i.e.,accA and accD)were all highly *** also induced the bacteria to produce more signalling molecules and regulate cellular functions,thereby enhancing the microbial adaptive and regulatory capacity to the unfavourable ***,the variations in fermentative microbes and their contributions to the upregulation of func-tional genes(i.e.,ytfR,gltL,INV,iolD and pflD)for VFA generation were ***,the simultaneous stimulation of functional microbial abundances and metabolic activities contributed to VFA production in allicin-conditioned reactors.

关键词： Allicin Waste activated sludge(WAS) Anaerobic fermentation Metagenomic analysis Functional genes

Preparation of new hyper cross-linked chelating resin for adsorption of Cu^(2+) and Ni^(2+) from water

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Chinese Chemical Letters 2012年第2期23卷 245-248页

作者： cheng cheng Jin Nan Wang Li Xu Ai Min Li state key laboratory of pollution control and resource reuse Nanjing UniversityNanjing 210046China school of the environment Nanjing UniversityNanjing 210046China

The new hyper cross-linked chelating resin NDWJN2 modified with carboxyl groups was prepared for removal of Cu^（2＋） and Ni^（2＋） from ***2 was characterized using BET,SEM and FT-IR *** with commercial resins D113 and IRC84,NDWJN2 could remove Cu^（2＋） and Ni^（2＋） from water more *** model could fit adsorption isotherms well.

关键词： Preparation Hyper cross-linked chelating resin Adsorption Cu^(2+) Ni^(2+)

Photodegradation of hexafluoropropylene Oxide Trimer Acid under UV Irradiation

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Journal of environmental Sciences 2020年第11期32卷 132-140页

作者： Chen Li Na Mi Zhanghao Chen cheng Gu state key laboratory of pollution control and resource reuse School of the EnvironmentNanjing UniversityNanjing 210023China

As a novel alternative to traditional perfluoroalkyl substances(PFASs),including perfluorooctanoic acid(PFOA)and perfluorooctane sulfonate(PFOS),hexafluoroproplyene oxide trimer acid(HFPO-TA)has been detected worldwide in surface ***,recent researches have demonstrated that HFPO-TA has stronger bioaccumulation potential and higher hepatotoxicity than *** treat these contaminants *** and PFOS,some photochemical techniques by adding exogenous substances had been ***,there is still no report for the behavior of HFPO-TA itself under direct UV *** current study investigated the photo-transformation of HFPO-TA under UV irradiation in aqueous *** 72 hr photoreaction,75%degradation ratio and 25%defluorination ratio were achieved under ambient *** active species,i.e.,hydrated electrons and active hydrogen atoms,generated from water splitting played dominant roles in degradation of HFPO-TA,which was confirmed by different effects of reaction atmospheres and quenching experiments.A possible degradation pathway was proposed based on the products identification and theoretical *** general,HFPO-TA would be transformed into shorter-chain PFASs,including hexafluoropropylene oxide dimer acid(HFPODA),perfluoropropionic acid(PFA)and trifluoroacetate(TFA).This research provides basic information for HFPO-TA photodegradation process and is essential to develop novel remediation techniques for HFPO-TA and other alternatives with similar structures.

关键词： HFPO-TA Photo-reductive Hydrated electrons Active hydrogen atoms Degradation pathway

hemin associated to cetyltrimethylammonium broide micelles: a biomimetic catalyst for 2,4,6-trichlorophenol degradation

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Science china.Chemistry 2015年第7期58卷 1220-1226页

作者： Lihui Zhang cheng Gu Ran Hong Haiping Zhang state key laboratory of pollution control & resource reuse school of environment Nanjing University school of Chemistry and Chemical Engineering Pingdingshan University

For the first time, an efficient, green, economical biomimetic catalyst （hemin-cetyltrimethylammonium bromide micelles） was discovered to degrade 2,4,6-trichlorophenol （TCP）. The degradation experiments indicate that pH, temperature, the addition of 2-methyIimidazole, and the amount of hydrogen peroxide influence the degradation process. Test of reusability revealed that CTAB micelles can protect hemin from destruction by H202 and that the materials can be recycled. This material can be of great use for waste-water treatment.

关键词： hemin-CTAB micelles biomimetic catalyst degrade TCP recycle

矿产资源型城市工业路径依赖综合诊断方法——基于改进的柯布-道格拉斯生产函数

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中国环境科学 2019年第1期39卷 412-419页

作者：周思杨李巍陈佳璇成润禾北京师范大学环境学院环境模拟与污染控制国家重点联合实验室北京100875

将矿产资源和生态环境要素纳入常规的柯布-道格拉斯(C-D)生产函数,构建资源-环境-经济综合诊断方法,并应用于以煤炭经济为主的鄂尔多斯市.结果显示,2001～2015年该市综合产出弹性为0.8158,呈规模报酬递减趋势;全市工业路径依赖于2001～2... 详细信息

将矿产资源和生态环境要素纳入常规的柯布-道格拉斯(C-D)生产函数,构建资源-环境-经济综合诊断方法,并应用于以煤炭经济为主的鄂尔多斯市.结果显示,2001～2015年该市综合产出弹性为0.8158,呈规模报酬递减趋势;全市工业路径依赖于2001～2007年处于综合边际收益(MR^(KLME))上升过程,2008～2015年进入MR^(KLME)下降过程.工业增长的生态环境成本明显升高,对MR^(KLME)起到显著减降作用,导致MR^(KLME)曲线拐点较常规C-D函数法提前约2～4a.对此,建议加大生态环境保护与治理力度、实施煤炭资源开发总量和强度"双控"等路径依赖破解措施.该方法可纠正由于未考虑资源和环境效应所产生的诊断偏差,有助于更加合理、准确地诊断特定资源型城市工业发展路径依赖的演化特点,并可据此提出有针对性的破解对策.

关键词：柯布-道格拉斯生产函数矿产资源型城市工业路径依赖边际收益资源-环境-经济综合诊断

汾渭平原PM_(2.5)和O_(3)污染导致的健康效应及情景预测

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环境科学研究 2024年第4期37卷 696-707页

作者：郝永佩宋晓伟朱晓东王京伟程鹏毕旭山西财经大学资源环境学院山西太原030006 南京大学环境学院污染控制与资源化研究国家重点实验室江苏南京210046

细颗粒物(PM_(2.5))和臭氧(O_(3))已成为主要大气污染物,对人体健康危害较大.本文选取大气污染防控重点区域汾渭平原作为研究区,分析2014-2021年PM_(2.5)和O_(3)浓度变化特征及其健康效应,并估算2030年实现不同减排标准的潜在健康效益.... 详细信息

细颗粒物(PM_(2.5))和臭氧(O_(3))已成为主要大气污染物,对人体健康危害较大.本文选取大气污染防控重点区域汾渭平原作为研究区,分析2014-2021年PM_(2.5)和O_(3)浓度变化特征及其健康效应,并估算2030年实现不同减排标准的潜在健康效益.结果表明:①2014-2021年汾渭平原PM_(2.5)年均浓度呈下降趋势,而O_(3)年均浓度却呈波动上升趋势,PM_(2.5)和O_(3)复合污染天数下降趋势显著.②归因于PM_(2.5)污染的早逝人数和经济损失均呈下降趋势;而归因于O_(3)污染的早逝人数及经济损失均呈上升趋势,2021年归因于O_(3)污染的全因、呼吸系统疾病和心血管疾病早逝人数较2014分别增加了60.36%、11.94%和74.32%,经济损失增加了136.60%、65.18%和157.20%,其中西安市和洛阳市健康风险与经济损失问题相对突出.③若2030年PM_(2.5)和O_(3)年均浓度均达《环境空气质量标准》(GB 3095-2012)二级标准限值,汾渭平原归因于PM_(2.5)和O_(3)的早逝人数较2021年将分别下降15.99%和2.71%,而随着人均可支配收入的逐年增加,健康经济损失将分别增加6.39×10^(8)元(95%CI:5.20×10^(8)~7.56×10^(8)元)和30.05×10^(8)元(95%CI:16.17×10^(8)~43.26×10^(8)元);若进一步将PM_(2.5)和O_(3)浓度降至更低,可进一步避免早逝人数的增加,且带来显著的经济效益.研究显示,汾渭平原PM_(2.5)治理有所成效,但是O_(3)污染问题凸显,其导致的健康死亡人数及经济损失均呈上升趋势,应保证达到现有标准的基础上制定更高目标标准,才能有效改善居民健康状况,并带来显著的经济效益.

关键词：细颗粒物(PM_(2.5)) 臭氧(O_(3)) 汾渭平原健康效益情景预测

Water softening by induced crystallization in fluidized bed

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Journal of environmental Sciences 2016年第12期28卷 109-116页

作者： Yuefang Che Rong Fan Danfeng An Yujie cheng Hazel Tan school of Civil and environment Engineering Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 China.

Fluidized bed and induced crystallization technology were combined to design a new type of induced crystallization fluidized bed reactor. The added particulate matter served as crystal nucleus to induce crystallization so that the insoluble material, which was in a saturated state, could precipitate on its surface. In this study, by filling the fluidized bed with quartz sand and by adjusting water pH, precipitation of calcium carbonate was induced on the surface of quartz sand, and the removal of water hardness was achieved. With a reactor influent flow of 60 L/hr, a fixed-bed height of 0.5 m, pH value of 9.5, quartz sand nuclear diameter of 0.2-0.4 mm, and a reflux ratio of 60%, the effluent concentration of calcium hardness was reduced to 60 mg/L and 86.6% removal efficiency was achieved. The resulting effluent reached the quality standard set for circulating cooling water. Majority of the material on the surface of quartz sand was calculated to be calcium carbonate based on energy spectrum analysis and moisture content was around 15.994%. With the low moisture content, dewatering treatment is no longer required and this results to cost savings on total water treatment process.

关键词： Fluidized bed Induced crystallization Hardness Softening capability Quartz sand

Two-dimension fluorescence correlation spectroscopy to characterize the binding of organic ligands with zinc in eutrophic lake

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Chinese Chemical Letters 2015年第2期26卷 205-209页

作者： Xin Liu Hua Lv Hua-cheng Xu College of Materials Science and Engineering Nanjing Forestry University state key laboratory of Lake Science and environment Nanjing Institute of Geography and LimnologyChinese Academy of Sciences

Metal binding of organic ligands can definitely affect its environmental behavior in waters,while information on the binding heterogeneity with different organic ligands is still lacked till *** this study,the binding of zinc with organic matters associated with cyanobacterial blooms,including dissolved organic matters（DOM） and attached organic matters（AOM）,were studied by using fluorescence quenching titration combined with two-dimensional correlation spectroscopy（2D-COS）.Metal-induced fluorescent quenching was obviously observed both for DOM and AOM,indicating the formation of metal-ligand *** with the one-dimensional spectra,2D-COS revealed the sequences of metal-ligand interaction with the following orders：276 nm 〉 232 ran for DOM and232 nm 〉 276 nm for ***,the modified Stern-Volmer model showed that the binding constant（logKM） of 276 nm in DOM was higher than that of 232 nm（4.93 vs.4.51）,while AOM was characterized with a high binding affinity for 232 nm（log KM：4.83）.The ranks of log KM values were consistent with the sequential orders derived from 2D-COS results both for the two *** quenching titration combined with 2D-COS was an effective method to characterize the metal-ligand interaction.

关键词： Metal binding Eutrophic lakes Dissolved organic matters(DOM) Attached organic matters(AOM) Two-dimensional correlation spectroscopy(2D-COS)