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https://www.readbyqxmd.com/read/29031054/magnetic-biochar-catalyst-derived-from-biological-sludge-and-ferric-sludge-using-hydrothermal-carbonization-preparation-characterization-and-its-circulation-in-fenton-process-for-dyeing-wastewater-treatment
#1
He Zhang, Gang Xue, Hong Chen, Xiang Li
To solve sludge disposal and management problems during dyeing wastewater treatment, the produced excess biological sludge and ferric sludge were fabricated into a magnetic biochar composite (MBC) under the optimal hydrothermal carbonization (HTC) conditions. With ferric sludge mixing, the generated MBC contained paramagnetic Fe3O4, showed a smaller diameter of approximately 200 nm, a smaller pore size, a larger specific surface area and a higher carbonization degree than BC prepared using a single biological sludge process under the same HTC conditions...
October 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/29022159/modulation-of-trace-element-bioavailability-for-two-earthworm-species-after-biochar-amendment-into-a-contaminated-technosol
#2
Lilian Marchand, Sophie Brunel-Muguet, Isabelle Lamy, Michel Mench, Celine Pelosi
Biochars are used as amendments to improve soil quality, but their effects on edaphic organisms such as earthworms remain controversial. This study aimed to assess the effects of adding a poultry manure-derived biochar into a contaminated technosol on trace element (TE) (i.e. As, Cd, Cu, Pb, and Zn) bioavailability for two earthworm species, Aporrectodea icterica and Aporrectodea longa. Three components of the bioavailability concept were determined using a pot experiment: (1) total soil TE (potentially reactive) and TE concentrations in the soil pore water (environmental availability), (2) TE concentrations in depurated whole earthworm bodies (environmental bioavailability) and (3) ecophysiological and biochemical effects on earthworms (toxicological bioavailability)...
October 11, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/29019933/adsorption-removal-of-17%C3%AE-estradiol-from-water-by-rice-straw-derived-biochar-with-special-attention-to-pyrolysis-temperature-and-background-chemistry
#3
Xiaohua Wang, Ni Liu, Yunguo Liu, Luhua Jiang, Guangming Zeng, Xiaofei Tan, Shaobo Liu, Zhihong Yin, Sirong Tian, Jiang Li
Rice straw biochar that produced at three pyrolysis temperatures (400, 500 and 600 °C) were used to investigate the adsorption properties of 17β-estradiol (E2). The biochar samples were characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), elemental analysis and BET surface area measurements. The influences of pyrolysis temperature, E2 concentration, pH, ionic strength, background electrolyte and humic acid were studied. Kinetic and isotherm results illustrated that the adsorption process could be well described by pseudo-second-order and Freundlich models...
October 11, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29017118/effects-of-sludge-thermal-alkaline-pretreatment-on-cationic-red-x-grl-adsorption-onto-pyrolysis-biochar-of-sewage-sludge
#4
Benyi Xiao, Qin Dai, Xiao Yu, Panfen Yu, Shimin Zhai, Rongzhan Liu, Xuesong Guo, Junxin Liu, Hong Chen
Thermal-alkaline pretreatment has traditionally been used to enhance anaerobic sludge digestion. In this study, after removing the supernatant, which could be used in anaerobic digestion, the Residual Solids of Thermal-Alkaline pretreated sewage Sludge (RSTAS) were used to prepare biochar via pyrolysis, which could then adsorb Cationic Red X-GRL(X-GRL). The experimental results showed that the RSTAS-biochar had a higher BET surface area and total pore volume than the biochar prepared from raw sludge (RS) (43...
October 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28993055/lignocellulosic-biorefinery-as-a-model-for-sustainable-development-of-biofuels-and-value-added-products
#5
REVIEW
Goldy De Bhowmick, Ajit K Sarmah, Ramkrishna Sen
A constant shift of society's dependence from petroleum-based energy resources towards renewable biomass-based has been the key to tackle the greenhouse gas emissions. Effective use of biomass feedstock, particularly lignocellulosic, has gained worldwide attention lately. Lignocellulosic biomass as a potent bioresource, however, cannot be a sustainable alternative if the production cost is too high and/ or the availability is limited. Recycling the lignocellulosic biomass from various sources into value added products such as bio-oil, biochar or other biobased chemicals in a bio-refinery model is a sensible idea...
September 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28992505/sorption-of-ionic-and-nonionic-organic-solutes-onto-giant-miscanthus-derived-biochar-from-methanol-water-mixtures
#6
Juhee Kim, Seunghun Hyun
The sorption of naphthalene (NAP) and 1-naphthoic acid (1-NAPA) onto giant Miscanthus-derived biochar was investigated in methanol volume fractions (fc) of 0-0.6 as a function of ionic composition (5mM CaCl2 and 10mM KCl) and liquid pH (2 and 7). The sorption onto biochar was nonlinear with 0.42≤N≤0.95; thus, a concentration-specific sorption constant (Km) was compared. The Km log linearly decreased with increasing fc, except for 1-NAPA from a CaCl2 mixture at pH7. Isotherm data was fitted with a cosolvency sorption model through which the slope (ασ) of the inverse log linear Km-fc plot and empirical constant (α) were obtained...
October 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28992497/rice-straw-based-biochar-beads-for-the-removal-of-radioactive-strontium-from-aqueous-solution
#7
Jiseon Jang, Waheed Mirana, Sewu D Divine, Mohsin Nawaz, Asif Shahzad, Seung Han Woo, Dae Sung Lee
Biochars from agricultural residues have recently attracted significant attention as adsorbents for purifying contaminated water and wastewater. In this study, the removal of strontium from aqueous solutions was investigated using rice straw-based biochar (RSBC) beads in both batch and continuous fixed-bed column systems. The RSBC beads had negatively charged surfaces and exhibited a large surface area (71.53m(2)/g) with high micro-porosity. The synthesized beads showed a maximum adsorption capacity of 175...
October 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28992478/mechanisms-of-biochar-assisted-immobilization-of-pb-2-by-bioapatite-in-aqueous-solution
#8
Zhengtao Shen, Da Tian, Xinyu Zhang, Lingyi Tang, Mu Su, Li Zhang, Zhen Li, Shuijin Hu, Deyi Hou
Bioapatite (BAp) is regarded as an effective material to immobilize lead (Pb(2+)) via the formation of stable pyromorphite. However, when applied in contaminated soil, due to its low surface area and low adsorption capacity, BAp might not sufficiently contact and react with Pb(2+). Biochar, a carbon storage material, typically has high surface area and high adsorption capacity. This study investigated the feasibility of using biochar as a reaction platform to enhance BAp immobilization of Pb(2+). An alkaline biochar produced from wheat straw pellets (WSP) and a slightly acidic biochar produced from hardwood (SB) were selected...
September 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28991804/continuous-biosorption-of-nickel-from-aqueous-solution-using-chrysanthemum-indicum-derived-biochar-in-a-fixed-bed-column
#9
Sowmya Vilvanathan, S Shanthakumar
The biosorption capability of Chrysanthemum indicum to remove nickel ions from aqueous solution in a fixed-bed column was examined in this study. Native C. indicum flower waste was improved for its biosorptive potential by pyrolysis to obtain its biochar form and, thereby, both raw (CIF-R) and biochar (CIF-BC) forms of the flower were used for Ni(II) removal. Fixed bed column studies were conducted to examine the influence of bed height (1.0-3.0 cm), flow rate (1.0-5.0 mL min(-1)) and initial metal ion concentration (25-75 mg L(-1))...
October 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28990143/turning-an-environmental-problem-into-an-opportunity-potential-use-of-biochar-derived-from-a-harmful-marine-biomass-named-cladophora-glomerata-as-anode-electrode-for-li-ion-batteries
#10
Pejman Salimi, Soheila Javadian, Omid Norouzi, Hussein Gharibi
The electrochemical performance of lithium ion battery was enhanced by using biochar derived from Cladophora glomerata (C. glomerata) as widespread green macroalgae in most areas of the Iran's Caspian sea coast. By the utilization of the structure of the biochar, micro-/macro-ordered porous carbon with olive-shaped structure was successfully achieved through pyrolysis at 500 °C, which is the optimal temperature for biofuel production, and was activated with HCl. The biochar and HCl treatment biochar (HTB) were applied as anode electrode in lithium ion batteries...
October 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28989751/characterization-and-pb-ii-removal-potential-of-corn-straw-and-municipal-sludge-derived-biochars
#11
Shujuan Wang, Wei Guo, Fan Gao, Rui Yang
Corn straw- and municipal sludge-derived biochars (CS-BC and MS-BC, respectively) were used to remove Pb(II) from aqueous solutions. Despite being pyrolysed at the same temperature (723 K), MS-BC showed higher porosity and hydrophobicity than CS-BC. The optimum biochar loading and pH values allowing efficient Pb(II) removal (greater than 80%) were 0.2 g l(-1) and 7.0, respectively. The presence of PO4(3-) (greater than 0.01 mol l(-1)) significantly affected the adsorptive performance of Pb(II) on the biochar samples...
September 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28988079/preparation-and-characterization-of-slow-release-fertilizer-encapsulated-by-biochar-based-waterborne-copolymers
#12
Songling Chen, Ming Yang, Chuang Ba, Susu Yu, Yifei Jiang, Hongtao Zou, Yulong Zhang
To enhance the effectiveness of polyvinyl alcohol (PVA) coated fertilizers, a novel slow-release fertilizer was developed using biochar and waterborne copolymer of PVA and polyvinylpyrrolidone (PVP) as coating materials. The effects of botanical origins and doses of biochar as well as copolymer concentrations on biochar-copolymer structures and properties were investigated. Our results indicated that the water absorbency of blend films differing in biochar origins showed different responses to these three factors...
October 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28988053/biochar-accelerates-pahs-biodegradation-in-petroleum-polluted-soil-by-biostimulation-strategy
#13
Lulu Kong, Yuanyuan Gao, Qixing Zhou, Xuyang Zhao, Zhongwei Sun
Sawdust and wheat straw biochars prepared at 300°C and 500°C were applied to petroleum-polluted soil for an 84-day incubation to estimate their effectiveness on polycyclic aromatic hydrocarbons (PAHs) removal. Biochars alone were most effective at reducing PAHs contents. However, adding biochar to soils in company with NaN3 solution resulted in a decreasing trend in terms of PAHs removal, which was even lower than treatment CK without biochar. Moreover, it was discovered by PCR-DGGE files and sequencing analysis that the predominant bacterial diversity slightly decreased but the abundance of some specific taxa, including PAHs degraders, was promoted with biochar input...
September 25, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28982063/aided-phytostabilisation-of-as-and-cu-contaminated-soils-using-white-lupin-and-combined-iron-and-organic-amendments
#14
Teresa Fresno, Eduardo Moreno-Jiménez, Pilar Zornoza, Jesús M Peñalosa
An aided phytostabilisation strategy consisting of several composite amendments of iron sulphate and organic materials combined with Lupinus albus L. (white lupin) was evaluated for remediation of an As- and Cu-contaminated soil. Iron sulphate was combined with lime, paper mill sludge (PS), olive mill waste compost (OMWC) or holm oak biochar (BC) and applied to a slightly acidic soil with high concentration of As (∼2200 mg kg(-1)) and Cu (∼150 mg kg(-1)). White lupin was grown for 48 days in pots containing amended and non-amended soils and the effect of soil treatments on soluble and extractable trace elements, soil fertility and plant growth and composition was evaluated...
October 2, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28979283/organic-molecules-from-biochar-leacheates-have-a-positive-effect-on-rice-seedling-cold-tolerance
#15
Jun Yuan, Jun Meng, Xiao Liang, Yang E, Xu Yang, Wenfu Chen
Biochar is known to have a number of positive effects on plant ecophysiology. However, limited research has been carried out to date on the effects and mechanisms of biochar on plant ecophysiology under abiotic stresses, especially responses to cold. In this study, we report on a series of experiments on rice seedlings treated with different concentrations of biochar leacheates (between 0 and 10% by weight) under cold stress (10°C). Quantitative real-time PCR (qRT-PCR) and cold-resistant physiological indicator analysis at low temperatures revealed that the cold tolerance of rice seedlings increased after treatment with high concentrations of biochar leacheates (between 3 and 10% by weight)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28972907/effectiveness-and-mechanisms-of-phosphate-adsorption-on-iron-modified-biochars-derived-from-waste-activated-sludge
#16
Qi Yang, Xiaolin Wang, Wei Luo, Jian Sun, Qiuxiang Xu, Fei Chen, Jianwei Zhao, Shana Wang, Fubing Yao, Dongbo Wang, Xiaoming Li, Guangming Zeng
Excessive discharge of phosphate (P) into the surface water is the key factor to cause the eutrophication, so its removal has aroused much attention in recent years. In this study, different iron modification (chemical co-precipitation of Fe(3+)/Fe(2+) or FeCl3 impregnation) was used to improve the phosphate adsorption capacity of waste activated sludge (WAS)-based biochar. Comparative tests demonstrated that the FeCl3-impregnated WAS-based biochar exhibited much superior phosphate adsorption capacity (111...
September 22, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28966625/biochar-as-plant-growth-promoter-better-off-alone-or-mixed-with-organic-amendments
#17
Giuliano Bonanomi, Francesca Ippolito, Gaspare Cesarano, Bruno Nanni, Nadia Lombardi, Angelo Rita, Antonio Saracino, Felice Scala
Biochar is nowadays largely used as a soil amendment and is commercialized worldwide. However, in temperate agro-ecosystems the beneficial effect of biochar on crop productivity is limited, with several studies reporting negative crop responses. In this work, we studied the effect of 10 biochar and 9 not pyrogenic organic amendments (NPOA), using pure and in all possible combinations on lettuce growth (Lactuca sativa). Organic materials were characterized by (13)C-CPMAS NMR spectroscopy and elemental analysis (pH, EC, C, N, C/N and H/C ratios)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28966026/arsenic-removal-by-perilla-leaf-biochar-in-aqueous-solutions-and-groundwater-an-integrated-spectroscopic-and-microscopic-examination
#18
Nabeel Khan Niazi, Irshad Bibi, Muhammad Shahid, Yong Sik Ok, Edward D Burton, Hailong Wang, Sabry M Shaheen, Jörg Rinklebe, Andreas Lüttge
In this study, we examined the removal of arsenite (As(III)) and arsenate (As(V)) by perilla leaf-derived biochars produced at 300 and 700 °C (referred as BC300 and BC700) in aqueous environments. Results revealed that the Langmuir isotherm model provided the best fit for As(III) and As(V) sorption, with the sorption affinity following the order: BC700-As(III) > BC700-As(V) > BC300-As(III) > BC300-As(V) (QL = 3.85-11.01 mg g(-1)). In general, As removal decreased (76-60%) with increasing pH from 7 to 10 except for the BC700-As(III) system, where notably higher As removal (88-90%) occurred at pH from 7 to 9...
September 28, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28966024/strong-binding-of-apolar-hydrophobic-organic-contaminants-by-dissolved-black-carbon-released-from-biochar-a-mechanism-of-pseudomicelle-partition-and-environmental-implications
#19
Heyun Fu, Chenhui Wei, Xiaolei Qu, Hui Li, Dongqiang Zhu
Dissolved black carbon (DBC), the soluble fraction of black carbon (BC), is an important constituent of dissolved organic matter pool. However, little is known about the binding interactions between hydrophobic organic contaminants (HOCs) and DBC and their significance in the fate process. This study determined the binding ability of DBC released from rice-derived BC for a series of apolar HOCs, including four polycyclic aromatic hydrocarbons and four chlorinated benzenes, using batch sorption and solubility enhancement techniques...
September 28, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28965077/lead-removal-by-a-magnetic-biochar-derived-from-persulfate-zvi-treated-sludge-together-with-one-pot-pyrolysis
#20
Yi-di Chen, Shih-Hsin Ho, Dawei Wang, Zong-Su Wei, Jo-Shu Chang, Nan-Qi Ren
In this study, a novel method to treat the persulfate-ZVI dewatered WAS by producing a magnetic biochar as an environmentally friendly biosorbent (nZVI-WSBC) to remove heavy metals (HMs) from wastewaters was proposed. The nZVI-WSBC exhibited good adsorption property of Pb(2+) and the adsorption isotherm data were fitted well to Langmuir isotherm. Corresponding reaction kinetics fitted well with the pseudo second-order adsorption model. Notably, nZVI-WSBC was successfully used for efficient removal of HMs from real...
September 20, 2017: Bioresource Technology
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