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https://www.readbyqxmd.com/read/29684778/improvement-in-productivity-nutritional-quality-and-antioxidative-defense-mechanisms-of-sunflower-helianthus-annuus-l-and-maize-zea-mays-l-in-nickel-contaminated-soil-amended-with-different-biochar-and-zeolite-ratios
#1
Ali Khan Shahbaz, Karolina Lewińska, Javed Iqbal, Qasim Ali, Mahmood-Ur-Rahman, Muhammad Iqbal, Farhat Abbas, Hafiz Muhammad Tauqeer, Pia Muhammad Adnan Ramzani
Nickel (Ni) contaminated soils pose a potential ecological risk to the environment, soil health, and quality of food produced on them. We hypothesized that application of miscanthus biochar (BC) and cationic zeolite (ZE) at various proportions into a Ni contaminated soil can efficiently immobilize Ni and reduce its bioavailability to sunflower (Helianthus annuus L.) and maize (Zea mays L.). An electroplating effluent contaminated soil was amended with BC and ZE, as sole treatments (2% w/w) and their combinations of various ratios (BC, ZE, BC25%ZE75%, BC50%ZE50% and BC75%ZE25%) for immobilization of Ni in the soil...
April 20, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29679872/maize-productivity-heavy-metals-uptake-and-their-availability-in-contaminated-clay-and-sandy-alkaline-soils-as-affected-by-inorganic-and-organic-amendments
#2
Mahmoud F Seleiman, Ahmed M S Kheir
Contamination of arid and semi-arid ecosystems by toxic heavy metals is a serious concern due to its impact on growth and productivity of crop and health risk through food chain. Therefore, the aims of this investigation were to study the impact of inorganic (i.e. nano hydroxyapatite, NHA and polyacrylamide, PAM) and organic (i.e. sugar beet factory lime, SBFL and biochar, BI) soil amendments on maize productivity grown in contaminated silty clay (i.e. fluvial, lacustrine) and sandy (i.e. marine) alkaline soils...
April 15, 2018: Chemosphere
https://www.readbyqxmd.com/read/29678495/self-activation-of-biochar-from-furfural-residues-by-recycled-pyrolysis-gas
#3
Yulei Yin, Yuan Gao, Aimin Li
Biochar samples with controllable specific surface area and mesopore ratio were self-activated from furfural residues by recycled pyrolysis gas. The objective of this study was to develop a new cyclic utilization method for the gas produced by pyrolysis. The influences of preparation parameters on the resulting biochar were studied by varying the pyrolysis-gas flow rate, activation time and temperature. Structural characterization of the produced biochar was performed by analysis of nitrogen adsorption isotherms at 77 K and scanning electron microscope (SEM)...
April 17, 2018: Waste Management
https://www.readbyqxmd.com/read/29677658/ex-situ-catalytic-upgrading-of-vapors-from-fast-microwave-assisted-co-pyrolysis-of-chromolaena-odorata-and-soybean-soapstock
#4
Yunpu Wang, Qiuhao Wu, Dengle Duan, Roger Ruan, Yuhuan Liu, Leilei Dai, Yue Zhou, Yunfeng Zhao, Shumei Zhang, Zihong Zeng, Lin Jiang, Zhenting Yu
Fast microwave-assisted catalytic co-pyrolysis of Chromolaena odorata (C. odorata) and soybean soapstock with HZSM-5 as an ex-situ catalyst was investigated. Effects of catalytic temperature, feedstock: catalyst ratio and C. odorata: soybean soapstock ratio on the yield and composition of the bio-oil were discussed. Results showed that catalytic temperature greatly influenced the bio-oil yield. Co-pyrolysis of C. odorata and soybean soapstock improved the bio-oil yield, and the maximum bio-oil yield of 55.14% was obtained at 250 °C...
April 12, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29676969/immobilization-of-heavy-metals-in-contaminated-soil-after-mining-activity-by-using-biochar-and-other-industrial-by-products-the-significant-role-of-minerals-on-the-biochar-surfaces
#5
Van Minh Dang, Stephen Joseph, Huu Tap Van, Thi Lan Anh Mai, Thi Minh Hoa Duong, Simon Weldon, Paul Munroe, David Mitchell, Sarasadat Taherymoosavi
Heavy metal contamination of crop lands surrounding mines in North Vietnam is a major environmental issue for both farmers and the population as a whole. Technology for the production of biochar at a village and household level has been successfully introduced into Vietnamese villages. This study was undertaken to determine if rice straw biochar produced in simple drum ovens could remediate contaminated land. Tests were also carried out to determine if biochar and apatite mixed together could be more effective than biochar alone...
April 20, 2018: Environmental Technology
https://www.readbyqxmd.com/read/29674151/use-of-a-hyperaccumulator-and-biochar-to-remediate-an-acid-soil-highly-contaminated-with-trace-metals-and-or-oxytetracycline
#6
Zhu Li, Mingyun Jia, Peter Christie, Shafaqat Ali, Longhua Wu
Biochars and hyperaccumulators have been widely used for the remediation of trace metal contaminated soils through immobilization and phytoextraction. These two options have rarely been used simultaneously despite their potential to achieve a greater decline in trace metal availability and higher removal efficiency in polluted soils. This study investigated the combined effects of biochar and the cadmium/zinc (Cd/Zn) hyperaccumulator Sedum plumbizincicola in a pot experiment and examined the effect of an antibiotic (oxytetracycline, OTC) in an acid soil spiked with Cd/Zn alone and with OTC...
April 13, 2018: Chemosphere
https://www.readbyqxmd.com/read/29673995/investigating-the-adsorption-behavior-and-the-relative-distribution-of-cd-2-sorption-mechanisms-on-biochars-by-different-feedstock
#7
Rong-Zhong Wang, Dan-Lian Huang, Yun-Guo Liu, Chen Zhang, Cui Lai, Guang-Ming Zeng, Min Cheng, Xiao-Min Gong, Jia Wan, Hao Luo
The objective of this study was to investigate the adsorption behavior and the relative distribution of Cd2+ sorption mechanisms on biochars by different feedstock. Bamboo biochars (BBCs), corn straw biochars (CBCs) and pig manure biochars (PBCs) were prepared at 300-700 °C. Adsorption results showed PBCs have the best adsorption capacity for Cd2+ , the extra adsorption capacity of PBCs mainly attributed to the precipitation or cation exchange, which played an important role in the removal of Cd2+ by PBCs...
April 10, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29671073/a-case-study-what-is-leached-from-mallee-biochars-as-a-function-of-ph
#8
Caroline Lievens, Daniel Mourant, Xun Hu, Yi Wang, Liping Wu, Angelina Rossiter, Richard Gunawan, Min He, Chun-Zhu Li
Biochar is widely considered as a soil amendment. This study aims to investigate the leaching of macronutrients (K, Mg and Ca) and organics from biochars produced from mallee biomass (wood, leaf, bark) in a fluidised-bed pyrolyser at 500 °C. Biochars were soaked in solutions of varying pH values and shaken for a pre-set period of time ranging from 1 h to 4 weeks. The initial pH values of the leaching solutions used (3.4, 5.5, 7 and 8.5) covered the pH range of the soils in the Wheatbelt region of Western Australia (WA)...
April 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29669299/biochar-increases-plant-growth-and-alters-microbial-communities-via-regulating-the-moisture-and-temperature-of-green-roof-substrates
#9
Haoming Chen, Jinyi Ma, Jiaxing Wei, Xin Gong, Xichen Yu, Hui Guo, Yanwen Zhao
Green roofs have increasingly been designed and applied to relieve environmental problems, such as water loss, air pollution as well as heat island effect. Substrate and vegetation are important components of green roofs providing ecosystem services and benefiting the urban development. Biochar made from sewage sludge could be potentially used as the substrate amendment for green roofs, however, the effects of biochar on substrate quality and plant performance in green roofs are still unclear. We evaluated the effects of adding sludge biochar (0, 5, 10, 15 and 20%, v/v) to natural soil planted with three types of plant species (ryegrass, Sedum lineare and cucumber) on soil properties, plant growth and microbial communities in both green roof and ground ecosystems...
April 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29666898/citrus-epicarp-derived-biochar-reduced-cd-uptake-and-ameliorates-oxidative-stress-in-young-abelmoschus-esculentus-l-moench-okra-under-low-cd-stress
#10
Clement O Ogunkunle, Mayank Varun, Iyanuoluwa G Ogundele, Kehinde S Olorunmaiye, Manoj S Paul
Due to the important role of biochar (BC) in reducing metal-toxicity in plants, this study was aimed at assessing the potential of citrus epicarp-derived BC in ameliorating Cd toxicity in young Abelmoschus esculentus (okra) under low Cd toxicity. Okra was grown in soil amended with BC at four treatment levels for 49 days as follows: control (A), sole 1.4 mg Cd/kg-spiked soil (B), 1.4 mg Cd/kg-spiked soil + 1% BC (C) and 1.4 mg Cd/kg-spiked soil + 3% BC (D). The results showed a dose-dependent reduction in shoot accumulation of Cd due to the BC application...
April 17, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29665534/effect-of-minerals-on-the-stability-of-biochar
#11
Yan Yang, Ke Sun, Lanfang Han, Jie Jin, Haoran Sun, Yu Yang, Baoshan Xing
The stability of biochar is a major determinant of its potential for carbon sequestration. In previous studies, the biochar stability was evaluated by analyzing the oxidation resistance property of biochar, for which, K2 Cr2 O7 /H2 O2 oxidation and thermogravimetric analysis (TGA) were widely used to measure the high oxidation resistance of biochars. In this study, rice straw (RI)- and swine manure (SW)-derived biochars produced at different heating treatment temperatures (HTTs) and their corresponding de-ashed biochars and iron-biochars were selected to investigate the effect of minerals on these biochars stability...
April 12, 2018: Chemosphere
https://www.readbyqxmd.com/read/29660731/remediation-of-multiple-heavy-metal-contaminated-soil-through-the-combination-of-soil-washing-and-in-situ-immobilization
#12
Xiuqing Zhai, Zhongwu Li, Bin Huang, Ninglin Luo, Mei Huang, Qiu Zhang, Guangming Zeng
The remediation of heavy metal-contaminated soils is a great challenge for global environmental sciences and engineering. To control the ecological risks of heavy metal-contaminated soil more effectively, the present study focused on the combination of soil washing (with FeCl3 ) and in situ immobilization (with lime, biochar, and black carbon). The results showed that the removal rate of Cd, Pb, Zn, and Cu was 62.9%, 52.1%, 30.0%, and 16.7%, respectively, when washed with FeCl3 . After the combined remediation (immobilization with 1% (w/w) lime), the contaminated soils showed 36...
April 13, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29660619/highly-efficient-removal-of-nitrogen-and-phosphorus-in-an-electrolysis-integrated-horizontal-subsurface-flow-constructed-wetland-amended-with-biochar
#13
Yan Gao, Wen Zhang, Bin Gao, Wen Jia, Aijun Miao, Lin Xiao, Liuyan Yang
Electrolysis combined with biochar (BC) was used in a constructed wetland to intensify nitrogen (N) and phosphorus (P) removal from wastewater simultaneously. A pilot study was conducted using an electrolysis-integrated, BC-amended, horizontal, subsurface-flow, constructed wetland (E-BHFCW). The research results showed that both electrolysis and BC substrate played important roles in the intensified, constructed wetland. The electrolysis combined BC substrate greatly enhanced the removal rates of nitrate (49...
April 4, 2018: Water Research
https://www.readbyqxmd.com/read/29656358/a-comparative-study-on-defluoridation-capabilities-of-biosorbents-isotherm-kinetics-thermodynamics-cost-estimation-and-eco-toxicological-study
#14
Shraboni Mukherjee, Sujata Dutta, Sourjya Ray, Gopinath Halder
The present study aims towards fluoride remediation from synthetic water using steam-activated carbon of Aegle marmelos (bael shell/wood apple) (BAC) and Parthenium hysterophorus (PHAC) according to batch sorption techniques. The impact of different parametric conditions viz. initial fluoride concentration (4-12 mg/L), time (0-5 h), temperature (293.15-333.15 K), adsorbent dosage (4-14 g/L), pH (4-9), and RPM (150-350) were considered for both the adsorbents. Maximum defluoridation of 89% was achieved by BAC at a concentration of 10 mg/L, adsorbent dose 6 g/L, pH 5, temperature 313...
April 14, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29656227/removal-of-hexavalent-chromium-from-aqueous-solution-by-different-surface-modified-biochars-acid-washing-nanoscale-zero-valent-iron-and-ferric-iron-loading
#15
Yuen Zhu, Hua Li, Guixiang Zhang, Fanjian Meng, Lifen Li, Shan Wu
Willow residue biochar (BC) and modified biochars (hydrochloric acid washing (HBC), HBC loaded with nanoscale zero-valent iron (nZVI-HBC), and HBC loaded with ferric iron (Fe3+ -HBC)) after aging were used for aqueous Cr(VI) removal. HBC (>98.67%), nZVI-HBC (>98.86%), and Fe3+ -HBC (>99.64%) kept high Cr(VI) removal rates under the acidic conditions within a wide pH range (<7.0), indicating their good adaptability to pH change because of aging. Cr(VI) reduction to Cr(III) was the dominant removal mechanism...
April 5, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29655897/adsorption-removal-of-natural-organic-matters-in-waters-using-biochar
#16
Duu-Jong Lee, Ya-Ling Cheng, Ruei-Jyun Wong, Xiao-Dong Wang
This work concerns the adsorption of aromatic organic matter from river water using various doses of a simulated biochar. The water yielded five UV254 peaks associated with organic matters in size exclusion chromatography (SEC), corresponding to molecular weights (MW) of 10,000, 6500, 4800, 3000, and 1500 Da. Biochar removes all of these peaks with an overall adsorption of 6.4 mg-DOC/g-C, and preferentially removes organic matter with high MW. Physisorption control in a pseudo-second-order type model fits the adsorption kinetics...
April 7, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29649736/impacts-of-biochar-and-oyster-shells-waste-on-the-immobilization-of-arsenic-in-highly-contaminated-soils
#17
Yongshan Chen, Jinghua Xu, Zhengyong Lv, Ruijia Xie, Liumei Huang, Jinping Jiang
Soil contamination is a serious problem with deleterious impacts on global sustainability. Readily available, economic, and highly effective technologies are therefore urgently needed for the rehabilitation of contaminated sites. In this study, two readily available materials prepared from bio-wastes, namely biochar and oyster shell waste, were evaluated as soil amendments to immobilize arsenic in a highly As-contaminated soil (up to 15,000 mgAs/kg). Both biochar and oyster shell waste can effectively reduce arsenic leachability in acid soils...
April 9, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29627960/reduced-bioavailability-and-plant-uptake-of-polycyclic-aromatic-hydrocarbons-from-soil-slurry-amended-with-biochars-pyrolyzed-under-various-temperatures
#18
Xiaomin Zhu, Yinshan Wang, Yuecan Zhang, Baoliang Chen
Biochar has high potential for organic pollutant immobilization due to its powerful sorption capacity. Nevertheless, potential risks may exist when biochar-sorbed organic pollutants are bioavailable. A direct plant exposure assay in combination with an organic solvent extraction experiment was carried out in this study to investigate the bioavailability of polycyclic aromatic hydrocarbons (PAHs) with the application of pine needle biochars pyrolyzed under different temperatures (100, 300, 400, and 700 °C; referred as P100-P700 accordingly)...
April 7, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29627650/performance-of-an-under-loaded-denitrifying-bioreactor-with-biochar-amendment
#19
Emily M Bock, Brady S L Coleman, Zachary M Easton
Denitrifying bioreactors are recently-established agricultural best management practices with growing acceptance in the US Midwest but less studied in other agriculturally significant regions, such as the US Mid-Atlantic. A bioreactor was installed in the Virginia Coastal Plain to evaluate performance in this geographically novel region facing challenges managing nutrient pollution. The 25.3 m3 woodchip bed amended with 10% biochar (v/v) intercepted subsurface drainage from 6.5 ha cultivated in soy. Influent and effluent nitrate-nitrogen (NO3 -N) and total phosphorus (TP) concentrations and flowrate were monitored intensively during the second year of operation...
April 5, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29627541/sorption-and-desorption-of-pb-ii-to-biochar-as-affected-by-oxidation-and-ph
#20
Qian Wang, Bing Wang, Xinqing Lee, Johannes Lehmann, Bin Gao
The use of biochar for the removal of heavy metals from water has environmental benefits. In order to elucidate the potential application of highly functionalized biochar for the removal of Pb(II) in aqueous solution, maple wood biochar was oxidized using hydrogen peroxide. The pH values of oxidized biochar ranged from 8.1 to 3.7, with one set being adjusted to a pH of 7 as a comparison. It was found that oxidizing the biochars increased their Pb(II) adsorption capacity if the pH remained below 6 (strong oxidation), but decreased their Pb(II) adsorption ability above pH6 (weak oxidation)...
April 5, 2018: Science of the Total Environment
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