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https://www.readbyqxmd.com/read/28734212/treatment-of-refractory-contaminants-by-sludge-derived-biochar-persulfate-system-via-both-adsorption-and-advanced-oxidation-process
#1
Jia Wang, Zhuwei Liao, Jerosha Ifthikar, Lerong Shi, Yunan Du, Jingyi Zhu, Shuang Xi, Zhuqi Chen, Zhulei Chen
A novel strategy for the removal of refractory organic contaminants was realized through sludge-derived biochar (SDBC)/persulfate (PS) system via both adsorption and advanced oxidation process under ambient conditions. SDBC was prepared by one single step of slow pyrolysis of municipal sewage sludge, appeared a porous structure, and contained abundant oxygen-containing functional groups as well as amorphous Fe species. Large surface area and porous structure of SDBC benefitted the adsorption and enrichment of contaminants, while oxygen-containing functional groups and Fe species on the surface were considered as reactive components for the activation of PS...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28731707/dynamic-effects-of-biochar-on-the-bacterial-community-structure-in-soil-contaminated-with-polycyclic-aromatic-hydrocarbons
#2
Yang Song, Yongrong Bian, Fang Wang, Min Xu, Ni Ni, Xinglun Yang, Chenggang Gu, Xin Jiang
The amendment of soil with biochar is an effective soil remediation strategy for organic contaminants. This study investigated the dynamic effects of wheat straw biochar on the bacterial community structure during remediation by high-throughput sequencing. The wheat straw biochar amended into the soil significantly reduced the bioavailability and toxicity of polycyclic aromatic hydrocarbons (PAHs). Biochar amendment helped to maintain the bacterial diversity in the PAH-contaminated soil. The relationship between the immobilization of PAHs and the soil bacterial diversity fit quadratic model...
July 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28730365/cd-pb-and-zn-mobility-and-bio-availability-in-contaminated-soils-from-a-former-smelting-site-amended-with-biochar
#3
Tonia Lomaglio, Nour Hattab-Hambli, Florie Miard, Manhattan Lebrun, Romain Nandillon, Dalila Trupiano, Gabriella Stefania Scippa, Arnaud Gauthier, Mikael Motelica-Heino, Sylvain Bourgerie, Domenico Morabito
Biochar is a potential candidate for the remediation of metal(loid)-contaminated soils. However, the mechanisms of contaminant-biochar retention and release depend on the amount of soil contaminants and physicochemical characteristics, as well as the durability of the biochar contaminant complex, which may be related to the pyrolysis process parameters. The objective of the present study was to evaluate, in a former contaminated smelting site, the impact of two doses of wood biochar (2 and 5% w/w) on metal immobilization and/or phytoavailability and their effectiveness in promoting plant growth in mesocosm experiments...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28730359/improving-cu-ii-sorption-by-biochar-via-pyrolyzation-under-co2-the-importance-of-inherent-inorganic-species
#4
Ran Wen, Bo Yuan, Yang Wang, Weimin Cao, Yuan Liu, Yi Jia, Qiang Liu
Biochar from Spartina alterniflora (SA) and rice straw (RS) under N2/CO2 were evaluated for Cu(II) removal from aqueous solution. The result indicates SA biochar prepared at 700 °C under CO2 can achieve a Cu(II) sorption capacity of 89.12 ± 2.77 mg/g, which is higher than that from N2 by about 50%. CO2 can promote the development of multi-porous structure, enhance specific surface area, and increase the amounts of hydroxyl and carboxyl groups on biochar. In addition, CO2 can inhibit the thermal decomposition of inorganic carbonate, such as MgCO3 and CaCO3 in biochar...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28726703/high-performance-magnetic-chicken-bone-based-biochar-for-efficient-removal-of-rhodamine-b-dye-and-tetracycline-competitive-sorption-analysis
#5
Akeem Adeyemi Oladipo, Ayodeji Olugbenga Ifebajo, Numrah Nisar, Olusegun Ayoola Ajayi
Magnetic chicken bone-based biochar (MCBB) was successfully prepared and efficiently adsorbed rhodamine-B (RB) dye and tetracycline (TC) in multi-component systems. The magnetisation value, surface area, and pHpzc of the MCBB were found to be 66.5 emu/g, 328 m(2)/g, and 8.3, respectively. RB has higher saturation capacity (96.5 mg/g) and occupies more active sites on MCBB, thus limiting the sorption of TC with lower saturation capacity (63.3 mg/g). Langmuir isotherm suitably describes the sorption process in a single-component system; however, the multi-component system was well fitted to the Sheindorf-Rebhun-Sheintuch model...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28724106/potential-environmental-benefits-from-blending-biosolids-with-other-organic-amendments-before-application-to-land
#6
Dharini Paramashivam, Nicholas M Dickinson, Timothy J Clough, Jacqui Horswell, Brett H Robinson
Biosolids disposal to landfill or through incineration is wasteful of a resource that is rich in organic matter and plant nutrients. Land application can improve soil fertility and enhance crop production but may result in excessive nitrate N (NO-N) leaching and residual contamination from pathogens, heavy metals, and xenobiotics. This paper evaluates evidence that these concerns can be reduced significantly by blending biosolids with organic materials to reduce the environmental impact of biosolids application to soils...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28724102/impact-of-biochar-organic-and-inorganic-carbon-on-soil-co2-and-n2o-emissions
#7
Rivka B Fidel, David A Laird, Timothy B Parkin
Biochar has been shown to influence soil CO and NO emissions following application to soil, but the presence of carbonates in biochars has largely confounded efforts to differentiate among labile and recalcitrant C pools in biochar and establish their timeframe of influence. Understanding the mechanism, magnitude, and duration of biochar C pools' influence on C and N dynamics is imperative to successful implementation of biochar for C sequestration. Here we therefore aim to assess biochar organic and inorganic C pool impacts on CO and NO emissions from soil amended with two untreated biochars, inorganic carbon (as NaCO), acid (HCl) and bicarbonate (NaHCO) extracts of the biochars, and acid and bicarbonate/acid-washed biochars during a 140-d soil incubation...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28724092/can-biochar-covers-reduce-emissions-from-manure-lagoons-while-capturing-nutrients
#8
Brian Dougherty, Myles Gray, Mark G Johnson, Markus Kleber
The unique physical and chemical properties of biochars make them promising materials for odor, gas, and nutrient sorption. Floating covers made from organic materials (biocovers) are one option for reducing odor and gas emissions from livestock manure lagoons. This study evaluated the potential of floating biochar covers to reduce odor and gas emissions while simultaneously sorbing nutrients from liquid dairy manure. This new approach has the potential to mitigate multiple environmental problems. Two biochars were tested: one made via gasification of Douglas fir chips at 650°C (FC650), and the other made from a mixture of Douglas fir [ (Mirb...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28720276/arsenic-removal-by-periphytic-biofilm-and-its-application-combined-with-biochar
#9
Ningyuan Zhu, Jianhong Zhang, Jun Tang, Yan Zhu, Yonghong Wu
A biochar and periphyton-based system (BPS) comprising of a biochar column and a periphyton bioreactor was designed to avoid the toxicity issue associated with removing As(III) from wastewater. Results showed that the periphyton can grow when As(III) is less than 5.0mgL(-1). The BPS obtained a high As(III) removal rate (∼90.2-95.4%) at flow rate=1.0mLmin(-1) and initial concentration of As(III)=2.0mgL(-1). About 60% of the As(III) was pre-treated (adsorbed) in the biochar column and the removal of the remaining As(III) was attributed to the periphyton bioreactor...
July 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28712780/a-review-of-biochar-based-catalysts-for-chemical-synthesis-biofuel-production-and-pollution-control
#10
REVIEW
Xinni Xiong, Iris K M Yu, Leichang Cao, Daniel C W Tsang, Shicheng Zhang, Yong Sik Ok
This review addresses the use of biochar as a green and versatile catalyst support for emerging high-end applications beyond soil remediation, including chemical synthesis and biodiesel production from biomass, and pollutant degradation in the environment. Their catalytic performances are comparable or even superior to the conventional resin-, silica-, or carbon-based catalysts, owing to the favourable intrinsic features of biochar (various functional groups, intricate network of structures, etc.). Yet, distinctive active sites are needed for different applications...
July 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28712779/fabrication-of-engineered-biochar-from-paper-mill-sludge-and-its-application-into-removal-of-arsenic-and-cadmium-in-acidic-water
#11
Kwangsuk Yoon, Dong-Wan Cho, Daniel C W Tsang, Nanthi Bolan, Jörg Rinklebe, Hocheol Song
An engineered biochar was fabricated via paper mill sludge pyrolysis under CO2 atmosphere, and its adsorption capability for As(V) and Cd(II) in aqueous solution was evaluated in a batch mode. The characterization results revealed that the biochar had the structure of complex aggregates containing solid minerals (FeO, Fe3O4 and CaCO3) and graphitic carbon. Adsorption studies were carried out covering various parameters including pH effect, contact time, initial concentrations, competitive ions, and desorption...
July 6, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28711001/improvements-in-wheat-productivity-and-soil-quality-can-accomplish-by-co-application-of-biochars-and-chemical-fertilizers
#12
Jawaria Sadaf, Ghulam Abbas Shah, Khurram Shahzad, Nadeem Ali, Muhammad Shahid, Safdar Ali, Rai Altaf Hussain, Zammurad Iqbal Ahmed, Bouba Traore, Iqbal M I Ismail, Muhammad Imtiaz Rashid
The beneficial role of biochar is evident in most of infertile soils, however this is argued that increment in crop yield owing to biochar application does not always achieve in cultivated/fertile soils. The nutrient biochar believed to enhance crop yield and soil fertility than structural biochar that may offset the positive effect of chemical fertilizer on crop performance but improves soil structural properties. Therefore, we investigated the effect of biochars [produced from nutrient rich feedstocks like poultry manure (PMB) and farmyard manure (FMB) and structural feedstocks such as wood chips (WCB) and kitchen waste (KWB)], and chemical fertilizers (CF) when applied alone or in combination on soil chemical properties, wheat growth, yield and nitrogen uptake in a cultivated clay loam soil...
July 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28710737/effect-of-rice-straw-biochar-on-selective-biodegradation-of-nonylphenols-in-isomer-specificity
#13
Lingdan Yao, Lixiao Wang, Guanghuan Cheng, Qian Huang, Baolan Hu, Jingrang Lu, Liping Lou
In a previous study, we found that rice-straw biochar degraded and removed hydrophobic organic contaminants (HOCs) through coupled adsorption-biodegradation. However, few studies have determined whether biochar affects HOC isomer degradation and isomer-selective biodegradation or whether biochar can alter HOC isomer features, resulting in changes to HOC isomer residues in water environments. In this study, the effects of biochar at two dosages (0.001 and 0.01 g) on the biodegradation of ten isomers of a typical xenoestrogen of nonylphenol (NP) were evaluated...
July 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28710473/influence-of-biochar-and-nitrogen-on-fine-root-morphology-physiology-and-chemistry-of-acer-mono
#14
Muhammad Razaq, Salahuddin, Hai-Long Shen, Hassan Sher, Peng Zhang
Fine roots play an important role in the overall functions of individual plants. Previous studies showed that fertilization and available soil resources have a notably profound effect on fine root, but there is lack of study centered on how fine root morphology, physiology, and chemistry respond to biochar with N additions. Different levels of biochar (0, 10, 15, and 20 g) and N (0, 2, 4 and 6 g) were applied to Acer mono seedling plants in a field nursery. The root system morphology and root chemistry and physiology were evaluated in line with root length, root diameter, SRL, N and N: C and root respiration...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28709884/applications-of-biochar-in-redox-mediated-reactions
#15
REVIEW
Yong Yuan, Nanthi Bolan, Antonin Prévoteau, Meththika Vithanage, Jayanta Kumar Biswas, Yong Sik Ok, Hailong Wang
Biochar is chemically more reduced and reactive than the original feedstock biomass. Graphite regions, functional groups, and redox-active metals in biochar contribute to its redox characteristics. While the functional groups such as phenolic species in biochar are the main electron donating moieties (i.e., reducers), the quinones and polycondensed aromatic functional groups are the components accepting electrons (oxidants). The redox capacity of biochar depends on feedstock properties and pyrolysis conditions...
June 30, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28709883/pyrolysis-characteristics-and-kinetics-of-microalgae-via-thermogravimetric-analysis-tga-a-state-of-the-art-review
#16
REVIEW
Quang-Vu Bach, Wei-Hsin Chen
Pyrolysis is a promising route for biofuels production from microalgae at moderate temperatures (400-600°C) in an inert atmosphere. Depending on the operating conditions, pyrolysis can produce biochar and/or bio-oil. In practice, knowledge for thermal decomposition characteristics and kinetics of microalgae during pyrolysis is essential for pyrolyzer design and pyrolysis optimization. Recently, the pyrolysis kinetics of microalgae has become a crucial topic and received increasing interest from researchers...
June 19, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28709053/transport-and-retention-of-biochar-nanoparticles-in-a-paddy-soil-under-environmentally-relevant-solution-chemistry-conditions
#17
Ming Chen, Dengjun Wang, Fan Yang, Xiaoyun Xu, Nan Xu, Xinde Cao
Land application of biochar has been increasingly recommended as a powerful strategy for carbon sequestration and soil remediation. However, the biochar particles, especially those in the nanoscale range, may migrate or carry the inherent contaminants along the soil profile, posing a potential risk to the groundwater. This study investigated the transport and retention of wood chip-derived biochar nanoparticles (NPs) in water-saturated columns packed with a paddy soil. The environmentally-relevant soil solution chemistry including ionic strength (0...
July 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28705422/a-critical-review-on-sustainable-biochar-system-through-gasification-energy-and-environmental-applications
#18
REVIEW
Siming You, Yong Sik Ok, Season S Chen, Daniel C W Tsang, Eilhann E Kwon, Jechan Lee, Chi-Hwa Wang
This review lays great emphasis on production and characteristics of biochar through gasification. Specifically, the physicochemical properties and yield of biochar through the diverse gasification conditions associated with various types of biomass were extensively evaluated. In addition, potential application scenarios of biochar through gasification were explored and their environmental implications were discussed. To qualitatively evaluate biochar sustainability through the gasification process, all gasification products (i...
July 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28704666/tio2-supported-on-reed-straw-biochar-as-an-adsorptive-and-photocatalytic-composite-for-the-efficient-degradation-of-sulfamethoxazole-in-aqueous-matrices
#19
Hanyu Zhang, Zhaowei Wang, Ruining Li, Jialei Guo, Yan Li, Junmin Zhu, Xiaoyun Xie
Heterogeneous photocatalysis namely titanium dioxide supported on reed straw biochar (acid pre-treated) (TiO2/pBC) was synthesized by sol-gel method. The morphology, surface area and structure of TiO2/pBC were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), and X-ray diffraction (XRD). Low calcination condition maintained the structure of biochar completely and prevented the agglomeration of TiO2 particles. Due to the combination of adsorption and photocatalysis, TiO2/pBC performed higher removal efficiency of sulfamethoxazole (SMX) than pure TiO2 powder under UV light irradiation...
July 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28697668/syntrophy-goes-electric-direct-interspecies-electron-transfer
#20
Derek R Lovley
Direct interspecies electron transfer (DIET) has biogeochemical significance and practical applications that rely on DIET or DIET-based aspects of microbial physiology are growing. Mechanisms for DIET have primarily been studied in defined cocultures in which Geobacter species are one of the DIET partners. Electrically conductive pili (e-pili) can be an important electrical conduit for DIET. However, there may be instances in which electrical contacts are made between electron transport proteins associated with the outer membranes of the partners...
July 11, 2017: Annual Review of Microbiology
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