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1. Simultaneous extraction and chromatographic separation of n-alkanes and alkenones from glycerol dialkyl glycerol tetraethers via selective Accelerated Solvent Extraction

Author:
Auderset, Alexandra; Schmitt, Mareike; Martínez-García, Alfredo
Source:
Organic geochemistry 2020 v.143 pp. 103979
ISSN:
0146-6380
Subject:
soil pH,   etc   ; carbon; chromatography; glycerol; isoprenoids; methane; solvents;     Show all 7 Subjects
Abstract:
... A method is described for simultaneous extraction and chromatographic separation of saturated hydrocarbons (n-alkanes) and unsaturated long-chain ketones (alkenones) from glycerol dialkyl glycerol tetraethers (GDGTs) using selective accelerated solvent extraction (ASE). We show that the method can be used to successfully separate n-alkanes and alkenones from GDGTs in marine sediment samples and n- ...
DOI:
10.1016/j.orggeochem.2020.103979

2. Identification of the potential risk areas for soil heavy metal pollution based on the source-sink theory

Author:
Jia, Xiaolin; Fu, Tingting; Hu, Bifeng; Shi, Zhou; Zhou, Lianqing; Zhu, Youwei
Source:
Journal of hazardous materials 2020 v.393 pp. 122424
ISSN:
0304-3894
Subject:
soil pH,   etc   ; environmental factors; geostatistics; heavy metals; particulates; pollution control; prediction; risk; soil pollution;     Show all 9 Subjects
Abstract:
... From the perspective of the mechanism of soil pollution, it is difficult to explain the process of predicting the spatial distributions of soil heavy metal pollution using traditional geostatistical methods at a regional scale. Furthermore, few methods are available to proactively identify potential risk areas for preventing soil contamination. In this study, we selected 13 environmental factors r ...
DOI:
10.1016/j.jhazmat.2020.122424

3. Environmental factors influencing spatial variability of soil total phosphorus content in a small watershed in Poyang Lake Plain under different levels of soil erosion

Author:
Han, Yi; Guo, Xi; Jiang, Yefeng; Xu, Zhe; Li, Zilin
Source:
Catena 2020 v.187 pp. 104357
ISSN:
0341-8162
Subject:
soil pH,   etc   ; autocorrelation; biogeochemical cycles; environmental factors; models; particle size; soil erosion; total phosphorus; watersheds; China;     Show all 10 Subjects
Abstract:
... Soil erosion can change the migration and deposition patterns of soil particles and alter the regional geographic environment; therefore, it plays an important role in the biogeochemical cycle of soil total phosphorus (STP). Quantifying the influence of environmental factors on STP content under soil erosion is critical for understanding the lateral transfer of STP from soil. Here, we explored the ...
DOI:
10.1016/j.catena.2019.104357

4. Tropical soil pH and sorption complex prediction via portable X-ray fluorescence spectrometry

Author:
dos Santos Teixeira, Anita Fernanda; Henrique Procópio Pelegrino, Marcelo; Missina Faria, Wilson; Henrique Godinho Silva, Sérgio; Gabriela Marcolino Gonçalves, Mariana; Weimar Acerbi Júnior, Fausto; Rezende Gomide, Lucas; Linares Pádua Júnior, Alceu; de Souza, Igor Alexandre; Chakraborty, Somsubhra; Weindorf, David C.; Roberto Guimarães Guilherme, Luiz; Curi, Nilton
Source:
Geoderma 2020 v.361 pp. 114132
ISSN:
0016-7061
Subject:
soil pH,   etc   ; X-ray fluorescence spectroscopy; prediction; soil fertility; sorption; tropical soils; wastes;     Show all 7 Subjects
Abstract:
... Portable X-ray fluorescence (pXRF) spectrometry delivers results rapidly, at low-cost, and without generating chemical residues. This study aimed to predict soil pH, sum of bases (SB), base saturation percentage (BSP), cation exchange capacity (CEC), and Al saturation (Alₛₐₜ) of 2017 contrasting Brazilian soil samples through the association of pXRF and three different algorithms [Cubist, Random f ...
DOI:
10.1016/j.geoderma.2019.114132

5. Effects of Biochar Pyrolyzed at Different Temperatures on the Survival of Salmonella in Vegetable Soils

Author:
Zhang, Taoxiang; Yu, Wei; Shi, Yuyu; Yang, Wenhao
Source:
Water, air, and soil pollution 2020 v.231 no.3 pp. 100
ISSN:
0049-6979
Subject:
soil pH,   etc   ; Salmonella; biochar; organic matter; pathogens; pig manure; potassium; pyrolysis; temperature; total nitrogen; vegetables;     Show all 11 Subjects
Abstract:
... Salmonella is a common zoonotic pathogen. Few studies have explored the effects of biochar on the survival of Salmonella in soil. Biochar made by pig manure at different temperatures were applied to four typical vegetable soils to investigate the survival dynamics of Salmonella. The results showed that the survival of Salmonella in latosol, red soil, and black soil was significantly promoted after ...
DOI:
10.1007/s11270-020-4438-9

6. Soil pH and temperature regulate assembly processes of abundant and rare bacterial communities in agricultural ecosystems

Author:
Jiao, Shuo; Lu, Yahai
Source:
Environmental microbiology 2020 v.22 no.3 pp. 1052-1065
ISSN:
1462-2912
Subject:
soil pH,   etc   ; agroecosystems; bacterial communities; community structure; corn; environmental factors; geographical distribution; paddies; phylogeny; temperature; China;     Show all 11 Subjects
Abstract:
... The factors determining stochastic and deterministic processes that drive microbial community structure, specifically the balance of abundant and rare bacterial taxa, remain underexplored. Here we examined biogeographic patterns of abundant and rare bacterial taxa and explored environmental factors influencing their community assembly processes in agricultural fields across eastern China. More phy ...
DOI:
10.1111/1462-2920.14815

7. Specific Features of Chernozemic Soils in the Area of the Khoper Deep Fault in the Earth Crust

Author:
Sukhanova, N. I.; Trofimov, S. Ya.; Stepanov, A. L.; Kiryushin, A. V.
Source:
Eurasian soil science 2020 v.53 no.2 pp. 197-206
ISSN:
1064-2293
Subject:
soil pH,   etc   ; Chernozems; carbonates; color; humus; humus horizons; hydrogen; iron; Russia;     Show all 9 Subjects
Abstract:
... Chernozemic soils (Voronezh oblast, Russia) are affected by the endogenous hydrogen fluid. The chemical properties of ordinary chernozems (Haplic Chernozems) are shown to be changed in the zones of local release of endogenous hydrogen owing to the reduction regime formed by the flow of hydrogen fluid. Soil acidity sharply increases, carbonate neoformations disappear, the profile becomes completely ...
DOI:
10.1134/S106422932002012X

8. Discriminative algorithm approach to forecast Cd threshold exceedance probability for rice grain based on soil characteristics

Author:
Yang, Jun; Zhao, Chen; Yang, Junxing; Wang, Jingyun; Li, Zhitao; Wan, Xiaoming; Guo, Guanghui; Lei, Mei; Chen, Tongbin
Source:
Environmental pollution 2020 v.261 pp. 114211
ISSN:
0269-7491
Subject:
soil pH,   etc   ; algorithms; cadmium; discriminant analysis; model validation; models; normal distribution; paddies; pollution; regression analysis; rice; uncertainty;     Show all 12 Subjects
Abstract:
... The relationship between cadmium (Cd) concentration in rice grains and the soil that they are cultivated in is highly uncertain due to the influence of soil properties, rice varieties, and other undetermined factors. In this study, we introduce the probability of exceeding the threshold to characterize this uncertainty and then, build a probabilistic forewarning model. Additionally, a number of as ...
DOI:
10.1016/j.envpol.2020.114211

9. Mechanisms responsible for N2O emissions from intertidal soils of the Yangtze Estuary

Author:
Gao, Dengzhou; Hou, Lijun; Liu, Min; Li, Xiaofei; Zheng, Yanling; Yin, Guoyu; Wu, Dianming; Yang, Yi; Han, Ping; Liang, Xia; Dong, Hongpo
Source:
The Science of the total environment 2020 v.716 pp. 137073
ISSN:
0048-9697
Subject:
soil pH,   etc   ; denitrification; ecosystems; estuaries; greenhouse gas emissions; hydroxylamine; iron; littoral zone; nitrogen; nitrous oxide; oxidation; oxygen; stable isotopes; wetlands;     Show all 14 Subjects
Abstract:
... Estuarine and coastal wetland ecosystems are important sources of atmospheric nitrous oxide (N₂O). However, the underlying driver of emitted N₂O from estuarine and coastal wetlands remains poorly understood. Here, natural-abundance isotope technique was applied to characterize the processes responsible for N₂O emission from the intertidal soils of the Yangtze Estuary. Measured N₂O emission rates r ...
DOI:
10.1016/j.scitotenv.2020.137073

10. pH-induced changes in fungal abundance and composition affects soil heterotrophic nitrification after 30 days of artificial pH manipulation

Author:
Zhang, Yi; Dai, Shenyan; Huang, Xinqi; Zhao, Ying; Zhao, Jun; Cheng, Yi; Cai, Zucong; Zhang, Jinbo
Source:
Geoderma 2020 v.366 pp. 114255
ISSN:
0016-7061
Subject:
soil pH,   etc   ; acetylene; acid soils; bacteria; cropland; forests; fungi; genes; nitrates; nitrification; nitrogen; soil acidification; stable isotopes; China;     Show all 14 Subjects
Abstract:
... Heterotrophic nitrification occurs extensively and is important for NO₃– production in acidic soils. However, whether low soil pH stimulates heterotrophic nitrification is unknown and the potential microbial driver is unclear. Thus, a pH gradient (3.5, 4.5, 5.5, 6.5, 7.5) was manipulated in forest (SF with initial pH 4.5) and cropland (SC with initial pH 5.5) soils in subtropical China to illustra ...
DOI:
10.1016/j.geoderma.2020.114255

11. Increases in pH, Ca2+, and Mg2+ alter the retention of diuron in different soils

Author:
das Chagas, Paulo Sergio Fernandes; Souza, Matheus de Freitas; Freitas, Claudia Daianny Melo; de Mesquita, Hélida Campos; Silva, Tatiane Severo; dos Santos, José Barbosa; Passos, Ana Beatriz Rocha de Jesus; de Medeiros, Rita de Cássia Araújo; Silva, Daniel Valadão
Source:
Catena 2020 v.188 pp. 104440
ISSN:
0341-8162
Subject:
soil pH,   etc   ; aqueous solutions; calcium; desorption; diuron; limestone; liming; magnesium; organic matter; sorption; sorption isotherms; weed control; weeds;     Show all 13 Subjects
Abstract:
... Increasing the pH of soils by applying limestone alters the sorption of herbicides and their efficiency at controlling weeds. The objectives of this study were to investigate the effects of increasing the pH and adding Ca²⁺ and Mg²⁺ on the sorption and desorption of diuron in different soils, and to evaluate the behavior of the herbicide in cationic solutions to determine whether precipitation is ...
DOI:
10.1016/j.catena.2019.104440

12. Sulfate application decreases translocation of arsenic and cadmium within wheat (Triticum aestivum L.) plant

Author:
Shi, Gaoling; Lu, Haiying; Liu, Huan; Lou, Laiqing; Zhang, Pingping; Song, Guicheng; Zhou, Huimin; Ma, Hongxiang
Source:
The Science of the total environment 2020 v.713 pp. 136665
ISSN:
0048-9697
Subject:
soil pH,   etc   ; Triticum aestivum; arsenic; cadmium; crops; lipid peroxidation; nitrogen; phosphorus; photosynthesis; polluted soils; rhizosphere; sodium sulfate; straw; sulfur; wheat;     Show all 15 Subjects
Abstract:
... Arsenic (As) and cadmium (Cd) typically exhibit divergent fates in soil, which complicates efforts to decrease As and Cd accumulation in the edible parts of crops. Here, we performed pot experiments to examine the effect of sulfate application on As and Cd accumulation in the grain of wheat grown in contaminated soil. Compared to the control (no sodium sulfate addition), application of 120 mg kg⁻¹ ...
DOI:
10.1016/j.scitotenv.2020.136665

13. Performances and mechanisms of sludge dewatering by a biopolymer from piggery wastewater and application of the dewatered sludge in remediation of Cr(VI)-contaminated soil

Author:
Guo, Junyuan; Wen, Xiaoying
Source:
Journal of environmental management 2020 v.259 pp. 109678
ISSN:
0301-4797
Subject:
soil pH,   etc   ; Bacillus megaterium; bioavailability; biopolymers; bound water; chlorides; chromium; coagulation; dewatering; filtration; flocculation; neutralization; polluted soils; remediation; sludge; wastewater;     Show all 16 Subjects
Abstract:
... In this study, a biopolymer was harvested from piggery wastewater to treat biological sludge. Effectiveness of the combination of polyaluminum chloride (PAC) and this biopolymer in sludge dewatering was investigated and the dewatering mechanism was discussed. Results showed that as high as 3.11 g of biopolymer can be harvested from 1 L of piggery wastewater by cultivating Bacillus megaterium. Afte ...
DOI:
10.1016/j.jenvman.2019.109678

14. The optimum pH and Eh for simultaneously minimizing bioavailable cadmium and arsenic contents in soils under the organic fertilizer application

Author:
Shen, Biaobiao; Wang, Xuemei; Zhang, Yan; Zhang, Meng; Wang, Kai; Xie, Pan; Ji, Hongbing
Source:
The Science of the total environment 2020 v.711 pp. 135229
ISSN:
0048-9697
Subject:
soil pH,   etc   ; arsenic; bioavailability; cadmium; fertilizer application; heavy metals; iron; manganese; organic fertilizers; polluted soils; soil sampling; water solubility;     Show all 12 Subjects
Abstract:
... Cadmium (Cd) and arsenic (As) are usually found in contaminated soils. Their bioavailabilities are often related to pH and Eh, which indicate a generally contrasting or antagonistic effect. In this paper, the pH and Eh of soil samples were altered by adding organic fertilizer, and Tessier sequential extraction procedures were used to extract heavy metal speciation. With increasing pH and decreasin ...
DOI:
10.1016/j.scitotenv.2019.135229

15. Pilot-scale electro-bioremediation of heavily PAH-contaminated soil from an abandoned coking plant site

Author:
Li, Fengmei; Guo, Shuhai; Wu, Bo; Wang, Sa
Source:
Chemosphere 2020 v.244 pp. 125467
ISSN:
0045-6535
Subject:
soil pH,   etc   ; bioremediation; electric field; environmental factors; polluted soils; polycyclic aromatic hydrocarbons; rain; risk; soil microorganisms; temperature; toxicity; China;     Show all 12 Subjects
Abstract:
... This study presents a systematic pilot-scale study on removal of PAHs from the abandoned site of Shenyang former Coking Plant in China (total PAH concentration of 5635.60 mg kg⁻¹ in soil). Three treatments, including the control treatment (without inoculation and electric field), bioremediation (with inoculation), and the electro-bioremediation (with inoculation and electric field), were conducted ...
DOI:
10.1016/j.chemosphere.2019.125467

16. Plant and soil traits driving soil fungal community due to tree plantation on the Loess Plateau

Author:
Yang, Yang; Cheng, Huan; Dou, Yanxing; An, Shaoshan
Source:
The Science of the total environment 2020 v.708 pp. 134560
ISSN:
0048-9697
Subject:
soil pH,   etc   ; Ascomycota; Basidiomycota; biomass; multidimensional scaling; plantations; soil fungi; soil organic carbon; structural equation modeling; terrestrial ecosystems; China;     Show all 11 Subjects
Abstract:
... It is widely accepted that soil fungi plays a crucial role in biogchemical cycle in terrestrial ecosystems, and soil fungal community can be shaped by plant and soil traits; however, we still know very little about the combined impacts of plant and soil traits on soil fungal community due to tree plantation, especially on the Loess Plateau. In doing so, we provided a conceptual framework bridging ...
DOI:
10.1016/j.scitotenv.2019.134560

17. Recycled concrete aggregate in base course applications: Review of field and laboratory investigations of leachate pH

Author:
Sanger, Morgan; Natarajan, Bharat Madras; Wang, Bu; Edil, Tuncer; Ginder-Vogel, Matthew
Source:
Journal of hazardous materials 2020 v.385 pp. 121562
ISSN:
0304-3894
Subject:
soil pH,   etc   ; batch systems; carbonation; concrete; environmental fate; leachates; leaching; pavements; trace elements; wastes; wet-dry cycles;     Show all 11 Subjects
Abstract:
... The prevalence of construction and demolition (C&D) waste and the concurrent demand for construction aggregate presents the opportunity to recycle C&D waste materials as substitutes for virgin aggregate. Commonly, recycled concrete aggregate (RCA) is used as base course in pavement construction. Environmentally responsible applications of RCA must consider the high pH leachate and trace element le ...
DOI:
10.1016/j.jhazmat.2019.121562

18. Immobilization and sorption of Cd and Pb in contaminated stagnic anthrosols as amended with biochar and manure combined with inorganic additives

Author:
Hamid, Yasir; Tang, Lin; Hussain, Bilal; Usman, Muhammad; Rehman Hashmi, Muhammad Laeeq ur; Bilal Khan, Muhammad; Yang, Xiaoe; He, Zhenli
Source:
Journal of environmental management 2020 v.257 pp. 109999
ISSN:
0301-4797
Subject:
soil pH,   etc   ; Anthrosols; additives; adsorption; application rate; biochar; cadmium; clay; field experimentation; fractionation; grain yield; harvesting; lead; models; phytomass; wheat;     Show all 16 Subjects
Abstract:
... The present study evaluated the efficiency of pre-selected composite amendments (CA-1: biochar-lime-sepiolite-zeolite and CA-2: manure-lime-sepiolite) for immobilization and sorption of Cd and Pb in field and batch sorption experiments. The field experiment was performed in a co-contaminated clay purple soil (stagnic anthrosols). Along with a control experiment (T1), CA-1 and CA-2 were tested at d ...
DOI:
10.1016/j.jenvman.2019.109999

19. Effects of different soil pH and nitrogen fertilizers on Bidens pilosa L. Cd accumulation

Author:
Dai, Huiping; Wei, Shuhe; Skuza, Lidia
Source:
Environmental science and pollution research international 2020 v.27 no.9 pp. 9403-9409
ISSN:
0944-1344
Subject:
soil pH,   etc   ; Bidens pilosa; acidification; ammonium sulfate; antioxidant enzymes; cadmium; calcium nitrate; hyperaccumulators; lipid peroxidation; nitrogen; nitrogen fertilizers; photosynthesis; rhizosphere;     Show all 13 Subjects
Abstract:
... Bidens pilosa L. was a Cd hyperaccumulator. This experiment determined the effects of different soil pH (adjusted by weak acid and alkali at 4.83, 6.81, and 7.84, respectively) and nitrogen ((NH₄)₂SO₄, Ca(NO₃)₂) on B. pilosa phytoextracting Cd in soil collected from a smelter (Cd concentration was 19.63 mg kg⁻¹). The results showed that the Cd concentrations in B. pilosa were significantly higher ...
DOI:
10.1007/s11356-019-07579-5

20. Soil nitrification increases with elevated phosphorus or soil pH in an acidic mixed mesophytic deciduous forest

Author:
DeForest, Jared L.; Otuya, Rael K.
Source:
Soil biology & biochemistry 2020 v.142 pp. 107716
ISSN:
0038-0717
Subject:
soil pH,   etc   ; biogeochemistry; deciduous forests; growing season; nitrates; nitrification; nitrogen; phosphorus; phosphorus fertilizers; Allegheny Mountain region; Ohio;     Show all 11 Subjects
Abstract:
... The role of phosphorus (P) mediating nitrogen (N) transformation processes is poorly understood which raises an important question: Does P, like soil pH, have a strong control in altering the cycling of soil N? From 2010 to 2018, pH and/or P availability was elevated with lime and P fertilizer in three mixed mesophytic deciduous forests on the unglaciated portion of the Allegheny Plateau, southeas ...
DOI:
10.1016/j.soilbio.2020.107716