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Insights into the conversion of dissolved organic phosphorus favors algal bloom, arsenate biotransformation and microcystins release of Microcystis aeruginosa

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Journal of Environmental Sciences 2023年第3期125卷 205-214页

作者： Xiaoyan Zhang Zhenhong Wang zhuanxi luo Yan Chen Xuguang Huang College of Chemistry Chemical Engineering and EnvironmentMinnan Normal UniversityKey Laboratory of Modern Separation and Analysis Science and TechnologyKey Laboratory of Pollution Monitoring and ControlZhangzhou 363000China College of Chemical Engineering Huaqiao UniversityXiamen 361021China

Little information is available on influences of the conversion of dissolved organic phosphorus(DOP) to inorganic phosphorus(IP) on algal growth and subsequent behaviors of arsenate(As(V)) in Microcystis aeruginosa(M. aeruginosa). In this study, the influences factors on the conversion of three typical DOP types including adenosine-5-triphosphate disodium salt(ATP), β-glycerophosphate sodium(βP) and D-glucose-6-phosphate disodium salt(GP)were investigated under different extracellular polymeric secretions(EPS) ratios from ***, and As(V) levels. Thus, algal growth, As(V) biotransformation and microcystins(MCs) release of M. aeruginosa were explored in the different converted DOP conditions compared with IP. Results showed that the three DOP to IP without EPS addition became in favor of algal growth during their conversion. Compared with IP, M. aeruginosa growth was thus facilitated in the three converted DOP conditions, subsequently resulting in potential algal bloom particularly at arsenic(As) contaminated water environment. Additionally, DOP after conversion could inhibit As accumulation in M. aeruginosa, thus intracellular As accumulation was lower in the converted DOP conditions than that in IP condition. As(V) biotransformation and MCs release in M. aeruginosa was impacted by different converted DOP with their different types. Specifically, DMA concentrations in media and As(III) ratios in algal cells were promoted in converted βP condition, indicating that the observed dissolved organic compositions from βP conversion could enhance As(V) reduction in M. aeruginosa and then accelerate DMA release. The obtained findings can provide better understanding of cyanobacteria blooms and As biotransformation in different DOP as the main phosphorus source.

关键词： Organic phosphorus Arsenate Phosphate Methylation Extracellular polymeric secretions

Stormwater Runoff Pollution in a Rural Township in the Hilly Area of the Central Sichuan Basin,China

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Journal of Mountain Science 2012年第1期9卷 16-26页

作者： luo zhuanxi WANG Tao GAO Meirong TANG Jialiang ZHU Bo Key Laboratory of Mountain Hazards and Surface Process Chinese academy of SciencesChengdu 610041China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China Institute of Urban Environment Chinese Academy of SciencesXiamen 361021China

Stormwater runoff in rural townships has a high potential for water quality impairment but little information is available on strormwater runoff pollution from rural *** investigate the characteristics of runoff pollution in a rural township,a catchment(2.32 ha) in Linshan Township,Sichuan,China was selected to examine runoff and quality parameters including precipitation,flow rate,and total nitrogen(TN),dissolved nitrogen(DN),total phosphorus(TP),dissolved phosphorus(DP),particulate phosphorus(PP),chemical oxygen demand(COD) and suspended solid(SS) in 12 rainfall events occurring between June 2006 and July *** show that the annual pollutant loads were 47.17 kg ha-1 for TN,6.64 kg ha-1 for TP,1186 kg ha-1 for COD,and 4297 kg ha-1 for *** and PP were the main forms of nitrogen and phosphorus in stormwater ***,COD and SS showed medium mass first flushes,in which nearly 40% of the total pollutant masses were transported by the first 30% of total flow *** peak of pollutant concentration appeared before the peak of runoff due to the first flush of accumulative pollutants in impervious areas and drainage *** EMC values of TN,TP,DN and PP were negatively correlated to the maximum rainfall intensity,precipitation,total flow volume,and runoff duration(P<0.05,n=12),while EMC of COD and SS were not related to any rainfall *** FF30(FF,First Flush) for TN,TP,COD and SS were positively correlated to the maximum rainfall intensity(P<0.05,n=12),and TP was also positively correlated to the average rainfall intensity(P<0.05,n=12),indicating that the magnitude of first flush increased with the rainfall intensity in the Linshan Township.

关键词： First flush Pollutant EMC Storm water Runoff Load

Synthesis of a novel ternary HA/Fe-Mn oxides-loaded biochar composite and its application in cadmium(Ⅱ) and arsenic(Ⅴ) adsorption

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环境科学学报：英文版 2019年第11期31卷 168-176页

作者： Jianhua Guo Changzhou Yan zhuanxi luo Hongda Fang Shugang Hu Yinglan Cao Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijing 100049 China College of Food and Biological Engineering Jimei University Xiamen 361021 China College of Chemical and Environmental Engineering Shandong University of Science and Technology Qingdao 266590 China

Cadmium (Cd) and arsenic (As) are two of the most toxic ***,the chemical behaviors of these two elements are different,making it challenging to utilize a single adsorbent with high adsorption capacity for both Cd(Ⅱ) and As(Ⅴ) *** solve this problem,we synthesized HA/Fe-Mn oxides-loaded biochar (HFMB),a novel ternary material,to perform this task,wherein scanning electron microscopy (SEM) combined with EDS (SEM-EDS) was used to characterize its morphological and physicochemical *** maximum adsorption capacity of HFMB was 67.11 mg/g for Cd(Ⅱ) and 35.59 mg/g for As(Ⅴ),which is much higher compared to pristine biochar (11.06 mg/g,0 mg/g for Cd(Ⅱ) and As(Ⅴ),respectively).The adsorption characteristics were investigated by adsorption kinetics and the effects of the ionic strength and pH of solutions.X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FT-IR) revealed that chelation and deposition were the adsorption mechanisms that bound Cd(Ⅱ) to HFMB,while ligand exchange was the adsorption mechanism that bound As(Ⅴ).

关键词： Humic acid Fe-Mn oxides Biochar Adsorption Cd(Ⅱ) As(Ⅴ)

Thallium contamination in agricultural soils and associated potential remediation via biochar utilization

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Biochar 2020年第1期2卷 33-46页

作者： zhuanxi luo Alexis Kayiranga Ernest Uwiringiyimana Qinghua Zhang Changzhou Yan Jianhua Guo Baoshan Xing Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA College of Chemical Engineering and Fujian Provincial Key Laboratory of Biochemical Technology Huaqiao UniversityXiamen 361021China

Thallium(Tl)is an extremely harmful metal that is substantially distributed in the *** can threaten human health via consumption of food potentially derived from Tl-contaminated agricultural *** information is available on how to utilize biochar to remediate Tl contamination in agricultural *** efforts are urgently needed to be devoted to developing effective techniques to empower biochar with high selectivity of Tl in agricultural *** this review,we provided comprehensive information on Tl contamination in agricultural *** also discussed recent developments and assessed the current status of biochar *** briefly reviewed the bridge between biochar preparation technology and utilization wherein further developments can exhibit potential in terms of Tl ***,biochar is expected to exhibit excellent Tl remediation performance in contaminated agricultural soils with promising application *** obtained knowledge provides further insights into the remediation of Tl contamination in agricultural soils.

关键词： Thallium contamination Remediation Biochar Pyrolysis Soil environment

Using water isotopes and hydrogeochemical evidences to characterize groundwater age and recharge rate in the Zhangjiakou area,North China

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Journal of Geographical Sciences 2020年第6期30卷 935-948页

作者： ZHANG Qinghua luo zhuanxi LU Wen HARALD Zepp ZHAO Yufeng TANG Jialiang Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentCASXiamen 361021FujianChina College of Geographical Science Shanxi Normal UniversityLinfen 041000ShanxiChina Institute of Mountain Hazards and Environment CASChengdu 610041China Geographical Institute Ruhr-University BochumBochum D-44780Germany

Despite the increasing depletion of the groundwater at the Zhangjiakou aquifer system in the northwest of Beijing-Tianjin-Hebei region,little information is available on the hydrological process of groundwater in this *** this study,we utilized water isotopes composition(51sO,5D and 3H)of groundwater,river and precipitation to identify the characteristics of hydrochemistry,groundwater age and recharge rates in different watersheds of the Zhangjiakou *** showed that the river water and groundwater could be characterized as HCO3-Mg Na,HCO3 CI-Na and HCO3-Mg Na,HCO3 CI-Na,HCO3 CI-Na Mg types,*** 5D and 5180 values in precipitation were linearly correlated,which is similar to the Global Meteorological Water Line(GMWL).Furthermore,the decreasing values of the 6D and 5180 from precipitation to surface water and groundwater indicate that groundwater is mainly recharged by atmospheric *** addition,the variation of 3H concentration with depth suggests that groundwater shallower than around 100 m is generally modern *** contrast,groundwater deeper around 100 m is a mixture of modern and old waters,which has longer residence *** showed a relatively low tritium concentration in the confined aquifers,indicating the groundwater recharged might be relatively old groundwater of over 60 *** flow velocity of the groundwater in the study area varied from 1.10 to 2.26 m/a,and the recharge rates ranged from 0.034 to 0.203 m/*** obtained findings provide important insights into understanding the groundwater recharge sources and hydrochemistry in the Zhangjiakou area,in turn developing a sustainable groundwater management plan.

关键词： hydrogen and oxygen isotopes tritium isotope water cycle groundwater Zhangjiakou

Distributive Characteristics of Metallic Nano-particles in China's Urban Water Bodies and their Ecological Risks

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Bulletin of the Chinese Academy of Sciences 2012年第1期26卷 99-103页

作者： GAO Yang luo zhuanxi XIA Jun Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Urban Environment and Health Institute for Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Engineering nano-materials & their impact on human health or environmental security constitute a newly emerging R&D hot spot and a key problem now urgently waiting for its solution in supporting the sustainability of China's nano-science and related technology development. At present, water bodies in Chinese cities have been seriously polluted by metallic nano-particles (MNPs) while related monitoring data are found woefully lacking throughout the country. Based on the above understanding, this article gives a round-up explanation on distributive characteristics of MNPs in the river mouths or water bodies of Chinese cities, their ecological hazards as well as our research in this regard, providing some inspiring ideas and data for control over this scourge. In addition, our exploration probes the discharge traits of MNPs themselves and the mechanism underlying its impact on water pollution.

关键词： metallic nano-particles (MNPs) water body pollution in cities ecological risks

Insights into thallium adsorption onto the soil,bamboo-derived biochar,and biochar amended soil in Pomelo orchard

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Biochar 2021年第3期3卷 315-328页

作者： Alexis Kayiranga zhuanxi luo Jean Claude Ndayishimiye François Nkinahamira Eric Cyubahiro Theogene Habumugisha Changzhou Yan Jianhua Guo Zhuo Zhen Alexandre Tuyishimire Hildebrand Didier Izabayo Institute of Urban Environment Chinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China College of Chemical Engineering Huaqiao UniversityXiamen 361021China College of Agricultural Animal Science and Veterinary Medicine(UR-CAVM)University of RwandaButareRwanda

Little information is available on thallium(Tl)adsorption onto biochar amended soil for a relatively long *** this study,bamboo-derived biochar(BDB),soil in pomelo orchard(SP),and biochar amended soil in pomelo orchard(BSP)were thus used to evaluate the potential remediation of thallium(Tl)using batch-adsorption ***,we characterized the above-mentioned sorbents’properties related to Tl adsorption to understand Tl’s adsorption *** results showed that BDB,SP,and BSP achieved equilibrium adsorption capacity of 96.9,95.43,and 96.76%,respectively,within the initial 15 *** means that compared to other sorbents,BSP exhibited an efficient sorbent for Tl remediation even when applied in the agricultural field for one ***-layer adsorption played a dominant role in the adsorption of Tl,which was supported by the suitability of Freundlich model for describing the adsorption behavior of Tl onto the selected *** addition,the pseudo-second kinetic order models strongly fitted Tl’s adsorption onto BDB,SP,and BSP,indicating that the process was accompanied by chemical *** on the surface of BDB by a Fourier Transform Infrared Spectrometer(FTIR)and an X-ray photoelectron spectroscopy(XPS),the presence of O-H groups and PO_(4)^(3−)might promote chemical adsorption of Tl onto ***,these findings can provide insights into comprehensively developed bamboo-derived biochar technology to remediate Tl contamination in agricultural soils.

关键词： Bamboo-derived biochar Pomelo orchard Thallium adsorption Soil remediation Long term application

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紫色土丘陵区农村集镇降雨径流污染特征

环境科学学报 2008年第9期28卷 1823-1831页

作者：罗专溪朱波汪涛张剑辛伟王冬中国科学院山地灾害与地表过程重点实验室西南大学资源与环境学院重庆400716

以2006年6月至2007年4月野外观测的8场降雨径流事件中TN、TP、COD与SS含量和流量数据为基础,分析了紫色土丘陵区农村集镇的降雨径流污染物来源、形态与输出负荷及初期冲刷效应,研究了农村集镇降雨径流污染特征.结果表明,农村集镇降雨径... 详细信息

以2006年6月至2007年4月野外观测的8场降雨径流事件中TN、TP、COD与SS含量和流量数据为基础,分析了紫色土丘陵区农村集镇的降雨径流污染物来源、形态与输出负荷及初期冲刷效应,研究了农村集镇降雨径流污染特征.结果表明,农村集镇降雨径流中TN、TP、COD与SS的事件平均浓度（EMC）均值分别为25.52、3.63、714、2396mg·L^-1,年污染负荷分别为39.21、5.57、993、3335kg·hm^-2.农村集镇降雨径流污染物浓度峰值出现在流量峰值之前,两者间隔时间为3-45min.近40%的TN、TP、COD与SS污染负荷由占总径流量30%的初期径流所运移,降雨径流污染物具有中等的初期冲刷效应.可溶性氮、颗粒态磷分别是农村集镇降雨径流污染中氮、磷素输出的主要形态.可溶性氮输出量受最大雨强影响较大（r=-0.825,p〈0.05）,而颗粒态磷输出量较为稳定,受降雨特征影响较小.不透水地面源污染与沟道累积污染是农村集镇降雨径流的主要污染源,透水地（林地、旱坡地）的水土流失则加剧其污染.

关键词：初期冲刷 EMC 负荷农村集镇

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紫色土坡耕地硝酸盐流失过程与特征研究

土壤学报 2010年第5期47卷 962-970页

作者：汪涛朱波罗专溪张剑中国科学院成都山地灾害与环境研究所成都610041

通过对紫色土坡耕地地表径流、壤中流径流过程及其硝酸盐含量的长期监测,研究紫色土坡耕地硝酸盐流失特征。结果表明,径流过程对紫色土坡耕地硝酸盐流失过程影响明显。地表径流过程中硝酸盐含量随降雨历时表现为先升后降的趋势,而壤中... 详细信息

通过对紫色土坡耕地地表径流、壤中流径流过程及其硝酸盐含量的长期监测,研究紫色土坡耕地硝酸盐流失特征。结果表明,径流过程对紫色土坡耕地硝酸盐流失过程影响明显。地表径流过程中硝酸盐含量随降雨历时表现为先升后降的趋势,而壤中流过程则表现为不断上升、趋于稳定的趋势。紫色土坡耕地硝酸盐流失潜在的环境风险极大,历次降雨产流事件中地表径流和壤中流NO3--N平均含量分别为0.73±0.17 mg L-1、21.72±2.05 mg L-1,其中,75%的地表径流NO3--N含量超过0.5 mg L-1,85%的壤中流NO3--N含量超过10 mg L-1。紫色土坡耕地地表径流NO3--N年流失负荷为0.93±0.05 kg hm-2,壤中流NO3--N年流失负荷为33.51±2.73 kg hm-2,分别占当季施肥量的0.62%、22.34%,随壤中流淋失是紫色土坡耕地硝酸盐流失的主要途径。紫色土坡耕地硝酸盐流失不仅可能造成当地地表水富营养化,而且可能造成当地浅层地下水硝酸盐污染,将加剧长江上游水环境压力。

关键词：紫色土坡耕地硝酸盐流失