Chemical Speciation and Bioavailability最新文献

Changes in phosphorus fractions caused by increased microbial activity in forest soil in a short-term incubation study 短期孵育研究中森林土壤中微生物活动增加引起的磷组分变化

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1433555

T. Kunito, Naomi Hiruta, Yasunori Miyagishi, H. Sumi, Hitoshi Moro

{"title":"Changes in phosphorus fractions caused by increased microbial activity in forest soil in a short-term incubation study","authors":"T. Kunito, Naomi Hiruta, Yasunori Miyagishi, H. Sumi, Hitoshi Moro","doi":"10.1080/09542299.2018.1433555","DOIUrl":"https://doi.org/10.1080/09542299.2018.1433555","url":null,"abstract":"Abstract The effects of adding larch (Larix kaempferi) leaf litter and nitrogen (N) on microbial activity and phosphorus (P) fractions in forest soil were examined in a short-term (28-d) laboratory incubation study. The soil was analyzed using a modified Hedley sequential extraction procedure and an acid phosphatase assay. The addition of larch litter and N increased the acid phosphatase activity and decreased the labile P (H2O-P + NaHCO3-P) concentration. Compared with addition of larch litter only, addition of both inputs decreased the proportion of inorganic P (Pi) and increased that of organic P (Po) in the NaOH fraction, bound to aluminum and iron oxides. The results of nutrient (carbon, N, or P) addition indicated that acid phosphatase was synthesized to acquire P. This study suggests that, in this forest soil, P in the H2O-P + NaHCO3-P and in the NaOH-Pi fractions was available for soil microorganisms to decompose leaf litter and that increase in microbial activity eventually translated in an increase in the proportion of Po found in the NaOH fraction in this forest soil.","PeriodicalId":55264,"journal":{"name":"Chemical Speciation and Bioavailability","volume":"30 1","pages":"13 - 9"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09542299.2018.1433555","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46742573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Humus stock degradation and its impact on phosphorus forms in arable soils – a case of the Ukrainian Forest-Steppe Zone 腐殖质种群退化及其对耕地土壤中磷形态的影响——以乌克兰森林草原带为例

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1457985

W. Spychalski, W. Grzebisz, J. Diatta, D. Kostarev

{"title":"Humus stock degradation and its impact on phosphorus forms in arable soils – a case of the Ukrainian Forest-Steppe Zone","authors":"W. Spychalski, W. Grzebisz, J. Diatta, D. Kostarev","doi":"10.1080/09542299.2018.1457985","DOIUrl":"https://doi.org/10.1080/09542299.2018.1457985","url":null,"abstract":"Abstract Soil humus degradation strengthens nutrient mining, especially phosphorus. This study was carried out on the Ukrainian Forest-Steppe Zone (UFSZ). A total of 21 soil profiles have been investigated: 11 Phaeozems, 6 Luvisols, and 4 Chernozems. Soils were tested for particle size distribution, calcium carbonate (CC), pH, and organic carbon (Corg). The evaluation of humus degradation as a reason of P depletion was performed based on indicators such as Humus Stock Gap (HSG), Humus Stability Index (S), and Yield Gap/Gain (YG/G). In order to evaluate the degree of P depletion, total phosphorus (Ptot) and its five fractions: water soluble – PH2O, exchangeable – PEX, bound to Fe and Al – PFe/Al, bound to Ca – PCa, and residual P – Pres, have been determined. Data revealed that in 14 of 21 investigated soils, S indices were below the threshold its value of nine, considered as the balanced content of humus with respect to soil texture. Next, in 11 of 21 cases, the negative humus balance indicates the yield gap in Phaeozems and Chernozems. The first three P pools (PH2O, PEX and PAl/Fe) in Phaeozems were exhausted, constituting less than 10% of the Ptot. In Phaeozems, PAl/Fe, in Luvisols, PEX, and in Chernozems, PH2O fractions were basic indicators of available P status. Their pools were directly or indirectly controlled by PCa. Humus content in Phaeozems and Chernozems revealed as the key factor impacting both total P and/or its available resources. Amelioration of P depletion requires efforts oriented on restoration of soil humus stock, concomitant with P fertilization.","PeriodicalId":55264,"journal":{"name":"Chemical Speciation and Bioavailability","volume":"30 1","pages":"33 - 46"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09542299.2018.1457985","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46332412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Quantitative assessment of environmental risk from lead pollution of shooting range soils 射击场土壤铅污染环境风险的定量评估

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1507689

Pogisego Dinake, Rosemary Kelebemang, Nicholas Sehube, Obed Kamwi, Masego Laetsang

{"title":"Quantitative assessment of environmental risk from lead pollution of shooting range soils","authors":"Pogisego Dinake, Rosemary Kelebemang, Nicholas Sehube, Obed Kamwi, Masego Laetsang","doi":"10.1080/09542299.2018.1507689","DOIUrl":"https://doi.org/10.1080/09542299.2018.1507689","url":null,"abstract":"ABSTRACT Risk assessment indices such as risk assessment code (RAC), potential ecological risk index (PERI), geoaccumulation index (Igeo), contamination factor (CF) and enrichment factor (EF) provide a good measure of environmental risk posed by Pb accumulated in shooting range soils as opposed to total Pb concentration. For this reason, the S/P Pistol shooting range, even though accumulated lower concentration of Pb (685±218 mg/kg), exhibited ‘very high risk’ to the environment with RAC value of 77 exceeding the 51 set guideline value for ‘very high risk’ with a significant margin compared to MAT R2 (20888±5419 mg/kg) at RAC value of 48 and highest total Pb concentration. This implies that mobility and bioavailability of Pb at S/P Pistol shooting range will be higher posing a greater risk to biota even though contamination from Pb is low. Best shooting range management practices and low cost remedial actions such as phytoremediation and chemical immobilization should be carried out as soon as possible to minimize the bioavailability and mobility of Pb in the studied shooting ranges.","PeriodicalId":55264,"journal":{"name":"Chemical Speciation and Bioavailability","volume":"30 1","pages":"76 - 85"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09542299.2018.1507689","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49364505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Metal based nanoparticles in agricultural system: behavior, transport, and interaction with plants 农业系统中的金属基纳米颗粒:行为、运输和与植物的相互作用

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1520050

Hao Chen

引用次数: 103

Removal of Levofloxacin from aqueous solution by Magnesium-impregnated Biochar: batch and column experiments 镁浸渍生物炭去除水溶液中的左氧氟沙星:间歇和柱式实验

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1487775

Xiaoqing Zhao, Shen Yi, S. Dong, Hongxia Xu, Yuanyuan Sun, Xin Hu

{"title":"Removal of Levofloxacin from aqueous solution by Magnesium-impregnated Biochar: batch and column experiments","authors":"Xiaoqing Zhao, Shen Yi, S. Dong, Hongxia Xu, Yuanyuan Sun, Xin Hu","doi":"10.1080/09542299.2018.1487775","DOIUrl":"https://doi.org/10.1080/09542299.2018.1487775","url":null,"abstract":"ABSTRACT Adsorption of levofloxacin (LEV) onto four types of magnesium (Mg)-impregnated biochars, fabricated via thermal pyrolysis of wood chips pretreated with MgSO4 was investigated. The Mg-impregnated biochars were characterized with various tools and techniques. Batch sorption experiments were conducted to determine the sorption kinetics and isotherms of LEV onto the Mg-impregnated biochars. The pseudo-second order kinetic model described the adsorption kinetic data better than the pseudo-first order kinetic model and the Elovich equation. Due to multi-mechanisms, the Freundlich model described the experimental isotherms better than the Langmuir model. The Langmuir maximum adsorption capacities of the Mg-impregnated biochars to LEV ranged from 7.38 to 25.2 mg g−1. In the fixed-bed column experiment, higher bed height and lower flow rate led to greater LEV removal. Findings from this work indicate that Mg-impregnated biochars can be used as an alternative adsorbent to effectively remove LEV from aqueous solutions.","PeriodicalId":55264,"journal":{"name":"Chemical Speciation and Bioavailability","volume":"30 1","pages":"68 - 75"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09542299.2018.1487775","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48827872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Characteristics of biochar produced from yak manure at different pyrolysis temperatures and its effects on the yield and growth of highland barley 牦牛粪不同热解温度下生物炭的特性及其对青稞产量和生长的影响

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1487774

Jiang-hong Zhang, Bing Huang, Liang Chen, Yang Li, Wei Li, Zhuanxi Luo

引用次数: 39

Co-transport of Pb (II) and Cd (II) in saturated porous media: effects of colloids, flow rate and grain size Pb (II)和Cd (II)在饱和多孔介质中的共输运:胶体、流速和晶粒尺寸的影响

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1531727

Bi‐Qin Xie, Yanji Jiang, Zhe Zhang, Gang Cao, Huimin Sun, Nong Wang, Shengsen Wang

引用次数: 19

Chemical speciation and complexation modeling of trace and rare earth elements in groundwater of Oban Massif and Mamfe mMbayment southeastern Nigeria 尼日利亚东南部奥班地块和Mamfe mMbayment地下水微量和稀土元素的化学形态和络合模拟

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1507690

G. U. Sikakwe, A. Otele, B. N. Ozibo

{"title":"Chemical speciation and complexation modeling of trace and rare earth elements in groundwater of Oban Massif and Mamfe mMbayment southeastern Nigeria","authors":"G. U. Sikakwe, A. Otele, B. N. Ozibo","doi":"10.1080/09542299.2018.1507690","DOIUrl":"https://doi.org/10.1080/09542299.2018.1507690","url":null,"abstract":"ABSTRACT Chemical speciation was carried out on trace and rare earth elements on trace and rare earth elements data on water samples in Oban Massif and Mamfe Mbayment southeastern Nigeria. Product moment correlation showed significant correlation at r>0.7 between REEs Pr and Nd, Pr and Lu, Sm and Nd, Sm and Pr, Tb and Nd, Tm and Tb, and Yb and Nd. Speciation modeling result showed that free metal ionic species dominated boreholes and spring water samples. The predominant trace metal complex is the OH- ligand. Trace elements mineral saturation indexes in boreholes at oversaturation (S>1) predicted more mineral species than equilibrium saturation (S=0). Rare earth elements mineral oversaturation (S>1) in boreholes predicted least mineral species. Undersaturation (S<1) predicted highest range of rare earth elements minerals. Springs and streams at S>1, predicted more mineral range than equilibrium (S=O) while mineral prediction at S<1 were the highest. Rare earth elements are precipitated at undersaturated condition in the study area.","PeriodicalId":55264,"journal":{"name":"Chemical Speciation and Bioavailability","volume":"30 1","pages":"86 - 98"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09542299.2018.1507690","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42277803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Vertical distribution and release characteristics of phosphorus forms in the sediments from the river inflow area of Dianchi Lake, China 滇池入流区沉积物中磷形态的垂直分布与释放特征

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1446766

W. Yang, Hanran Xiao, Ye Li, D. Miao

{"title":"Vertical distribution and release characteristics of phosphorus forms in the sediments from the river inflow area of Dianchi Lake, China","authors":"W. Yang, Hanran Xiao, Ye Li, D. Miao","doi":"10.1080/09542299.2018.1446766","DOIUrl":"https://doi.org/10.1080/09542299.2018.1446766","url":null,"abstract":"Abstract Columnar sediment samples were collected from five representative river inflow areas of Dianchi Lake, China. The vertical distribution of each form of P were tested. Results showed that the concentration of TP in the sediments from areas A, B, C, D and E in the order of D > B > A > C > E, and the average concentration of D, B, A, C and E were 2991, 2064, 1308, 879, and 759 mg•kg−1, respectively. The concentration of Ex-P, Fe/Al-P, Ca-P and Org-P all decreased with increasing depth. The release of Ex-P was significantly related to TP whereas the Fe/Al-P was not significantly related to TP in the samples from areas polluted by domestic sewage. However, the release of Ex-P and Fe/Al-P were both significantly related to TP in the samples from areas polluted by phosphate mining and phosphate fertilizer application. The results of equilibrium P concentration (EPC0) analysis showed that P in the sediments of areas A, D and E were the source of P in Dianchi Lake, and the P in the sediments of areas B and C were in relative equilibrium with the overlying water.","PeriodicalId":55264,"journal":{"name":"Chemical Speciation and Bioavailability","volume":"30 1","pages":"14 - 22"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/09542299.2018.1446766","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41550453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Metal-organic framework DUT-67 (Zr) for adsorptive removal of trace Hg2+ and CH3Hg+ in water 金属有机骨架DUT-67 (Zr)吸附去除水中痕量Hg2+和CH3Hg+

Chemical Speciation and Bioavailability Pub Date : 2018-01-01 DOI: 10.1080/09542299.2018.1509020

Sha Chen, Fan Feng, Sumei Li, Xiao-Xin Li, Lun Shu

引用次数: 18