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Saqib Bashir, Jun Zhu, Qingling Fu, Hongqing Hu
Agricultural soils contamination with cadmium (Cd) has become a serious concern through anthropogenic activities. The possible environmental friendly solutions for Cd are required to address its mobility through various cost effective amendments. This study aims to evaluate the impact of rice straw biochar (BC), zeolite (ZE) and rock phosphate (RP) stabilizers to minimize the potential risk of Cd mobility and its uptake by water spinach in acidic soil through pot experiment. Concentration of Cd in TCLP and CaCl2 extract gradually decreased with the increase of amendments (BC, ZE and RP) rates...
November 29, 2017: Chemosphere
Ling Liu, Jiwei Li, Feixue Yue, Xinwei Yan, Fayuan Wang, Sean Bloszies, Yanfang Wang
Experiments conducted to understand how arbuscular mycorrhizal (AM) inoculation or biochar application affect plant growth and heavy metal uptake have thus far looked at single applications of either soil amendment. There is little evidence of their synergistic effects, in particular for plants grown in cadmium (Cd) contaminated soil. We conducted a mesocosm experiment to investigate the effect of AM inoculation (Glomus intraradices BEG 141) and/or wheat-straw biochar amendment on maize (Zea mays L. cv. Hongdan No...
December 6, 2017: Chemosphere
Tingting Qin, Zhaowei Wang, Xiaoyun Xie, Chaoran Xie, Junmin Zhu, Yan Li
The biochar was prepared by pyrolyzing the roots of cauliflowers, at a temperature of 500 °C under oxygen-limited conditions. The structure and characteristics of the biochar were examined using scanning electron microscopy, an energy dispersive spectrometer, a zeta potential analyzer, and Fourier transform infrared spectroscopy. The effects of the temperature, the initial pH, antibiotic concentration, and contact time on the adsorption of norfloxacin (NOR) and chlortetracycline (CTC) onto the biochar were investigated...
December 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Linson Lonappan, Tarek Rouissi, Satinder Kaur Brar, Mausam Verma, Rao Y Surampalli
Due to its wide occurrence in water resources and toxicity, pharmaceuticals and personal care products are becoming an emerging concern throughout the world. Application of residual/waste materials for water remediation can be a good strategy in waste management as well as in waste valorization. Herein, this dataset provides information on biochar application for the removal of emerging contaminant, diclofenac from water matrices. The data presented here is an extension of the research article explaining the mechanisms of adsorption diclofenac on biochars (Lonappan et al...
February 2018: Data in Brief
H P Lu, Z A Li, G Gascó, A Méndez, Y Shen, J Paz-Ferreiro
Modified biochars, including magnetic biochars, have been tested in water for the removal of inorganic pollutants. However, at present it is unknown if they possess benefits over conventional biochar materials in relation to land remediation. A paddy soil was collected near Liantang village in Lechang Pb-Zn mine area in Guangdong Province (China). The soil was polluted with Cd, Cu, Zn and Pb, with total contents of 1.4mg/kg, 80mg/kg, 1638mg/kg and 2463mg/kg, respectively. We prepared magnetic and conventional biochar from two feedstocks (poultry litter and Eucalyptus) at a temperature of 300 and 500°C...
December 8, 2017: Science of the Total Environment
Honghong Lyu, Hang Zhao, Jingchun Tang, Yanyan Gong, Yao Huang, Qihang Wu, Bin Gao
Biochar supported carboxymethyl cellulose (CMC)-stabilized nanoscale iron sulfide (FeS) composite (CMC-FeS@biochar) was prepared and tested for immobilization of hexavalent chromium Cr(VI) in soil. Results of UV-vis and transmission electron microscopy (TEM) showed that the backbone of biochar suppressed the aggregation of FeS, resulting in smaller particle size and more sorption sites than bare FeS. The composite at a dosage of 2.5 mg per gram soil displayed an enhanced Cr(VI) immobilization efficiency (a 94...
December 1, 2017: Chemosphere
Shivali Sahota, Virendra Kumar Vijay, P M V Subbarao, Ram Chandra, Pooja Ghosh, Goldy Shah, Rimika Kapoor, Vandit Vijay, Vaibhav Koutu, Indu Shekhar Thakur
Installation of decentralized units for biogas production along with indigenous upgradation systems can be an effective approach to meet growing energy demands of the rural population. Therefore, readily available leaf waste was used to prepare biochar at different temperatures and employed for H2S removal from biogas produced via anaerobic digestion plant. It is found that biochar prepared via carbonization of leaf waste at 400 °C effectively removes 84.2% H2S (from 1254 ppm to 201 ppm) from raw biogas for 25 min in a continuous adsorption tower...
November 29, 2017: Bioresource Technology
Munir Ahmad, Adel R A Usman, Abdullah S Al-Faraj, Mahtab Ahmad, Abdelazeem Sallam, Mohammad I Al-Wabel
Biochar (BC) was produced by pyrolyzing the date palm leaf waste at 600 °C and then loaded with phosphorus (P) via sorption process. Greenhouse pot experiment was conducted to investigate the application effects of BC and P-loaded biochar (BCP) on growth and availability of P and heavy metals to maize (Zea mays L.) plants grown in contaminated mining soil. The treatments consisted of BC and BCP (at application rates of 5, 10, 20, and 30 g kg-1 of soil), recommended NK and NPK, and a control (no amendment)...
November 28, 2017: Chemosphere
Manhattan Lebrun, Florie Miard, Romain Nandillon, Jean-Christophe Léger, Nour Hattab-Hambli, Gabriella S Scippa, Sylvain Bourgerie, Domenico Morabito
Soil contamination by metal(loid)s is one of the most important environmental problem. It leads to loss of environment biodiversity and soil functions and can have harmful effects on human health. Therefore, contaminated soils could be remediated, using phytoremediation. Indeed, plant growth will improve soil conditions while accumulating metal(loid)s and modifying their mobility. However, due to the poor fertility and high metal(loid)s levels of these soils, amendments, like biochar, has to be applied. This study was performed on a former mine technosol contaminated by As and Pb and aimed to study (i) the effect of biochar on soil physico-chemical properties and plant phytostabilization potential (ii) biochar feedstock and particle size effects...
November 28, 2017: Chemosphere
Cynthia Gilmour, Tyler Bell, Ally Soren, Georgia Riedel, Gerhardt Riedel, Dianne Kopec, Drew Bodaly, Upal Ghosh
The efficacy of thin layer in situ soil amendments was tested as a potential tool for methylmercury (MeHg) risk mitigation in Penobscot River, ME, salt marsh. Salt marshes are sites of high MeHg accumulation within the Penobscot, and key targets for remediation. The study was a fully-crossed small plot study, with four treatments (activated carbon (AC), biochar, FeCl2, and lime) and unamended controls at two sites. Plots were monitored for two years. Porewater MeHg concentrations were the main endpoint, with impacts on sediment biogeochemistry as a secondary study goal...
December 4, 2017: Science of the Total Environment
Govind D Vyavahare, Ranjit G Gurav, Pooja P Jadhav, Ravishankar R Patil, Chetan B Aware, Jyoti P Jadhav
In the present study, sorption and detoxification of malachite green (MG) dye was executed using biochar resulting after pyrolysis of agro-industrial waste at 400, 600 and 800 °C. Maximum sorption of MG dye (3000 mg/L) was observed on the sugarcane bagasse biochar (SCB) prepared at 800 °C. The interactive effects of different factors like dye concentration, time, pH and temperature on sorption of MG dye were investigated using response surface methodology (RSM). Optimum MG dye concentration, contact time, temperature and pH predicted through Box-Behnken based RSM model were 3000 mg/L MG dye, 51...
December 1, 2017: Chemosphere
Myoung-Eun Lee, Jin Hee Park, Jae Woo Chung
Ginkgo trees are common street trees in Korea, and the large amounts of leaves that fall onto the streets annually need to be cleaned and treated. Therefore, fallen gingko leaves have been used as a raw material to produce biochar for the removal of heavy metals from solutions. Gingko-leaf-derived biochar was produced under various carbonization temperatures and times. This study evaluated the physicochemical properties and adsorption characteristics of gingko-leaf-derived biochar samples produced under different carbonization conditions regarding Pb(II) and Cu(II)...
December 7, 2017: International Journal of Environmental Research and Public Health
Santanu Bakshi, Chumki Banik, David A Laird
The C:N ratios of biochar labile fractions is important for assessing biochar stability and N cycling in soil. Here we compare chemically and thermally labile fractions for nine biochars produced from five biomass feedstocks using four production techniques. Biochar fractionation methods included proximate analysis, hot water extraction, acid and base extractions (0.05 M, 0.5 M, 1 M, 2 M, 3 M, and 6 M of either H2SO4 or NaOH), and oxidation with 15% H2O2 and 0.33 M KMnO4 (pH 7.2). Results show chemical addition reactions cause underestimation of mass of the labile fraction for chemical extraction and oxidation procedures but not the thermal procedure...
December 1, 2017: Chemosphere
Nadejda Andreev, Mariska Ronteltap, Boris Boincean, Piet N L Lens
Studies show that source separated human excreta have a fertilizing potential with benefits to plant growth and crop yield similar or exceeding that of mineral fertilizers. The main challenges in fertilizing with excreta are pathogens, and an increased risk of eutrophication of water bodies in case of runoff. This review shows that lactic acid fermentation of excreta reduces the amount of pathogens, minimizes the nutrient loss and inhibits the production of malodorous compounds, thus increasing its agricultural value...
December 2, 2017: Journal of Environmental Management
James Tsz Fung Wong, Zhongkui Chen, Annie Yan Yan Wong, Charles Wang Wai Ng, Ming Hung Wong
Compacted clay is widely used as capillary barriers in landfill final cover system. Recently, biochar amended clay (BAC) has been proposed as a sustainable alternative cover material. However, the effects of biochar on saturated hydraulic conductivity (ksat) of clay with high degree of compaction is not yet understood. The present study aims to investigate the effects of biochar on ksat of compacted kaolin clay. Soil specimens were prepared by amending kaolin clay with biochar derived from peanut-shell at 0, 5 and 20% (w/w)...
December 2, 2017: Environmental Pollution
Zhongxin Tan, Zhixiong Ye, Limei Zhang, Qiaoyun Huang
Biochar nitrogen is key to improving soil fertility, but the distribution of biochar nitrogen in the biomass-biochar-plant system is still unclear. To provide clarity, the 15N tracer method was utilised to study the distribution of biochar nitrogen in the biochar both before and after its addition to the soil. The results can be summarised as follows. 1) The retention rate of 15N in biochar decreases from 45.23% to 20.09% with increasing pyrolysis temperature from 400 to 800°C in a CO2 atmosphere. 2) The retention rate of 15N in biochar prepared in a CO2 atmosphere is higher than that prepared in a N2 atmosphere when the pyrolysis temperature is below 600°C...
December 1, 2017: Science of the Total Environment
David O'Connor, Tianyue Peng, Guanghe Li, Shuxiao Wang, Lei Duan, Jan Mulder, Gerard Cornelissen, Zhenglin Cheng, Shengmao Yang, Deyi Hou
Mercury (Hg) contamination of surface soils has increased by ~86Giga grams due to anthropogenic activities. There is an urgent need to find new, effective and preferably 'green' remediation technologies to protect human health and the environment. Sulfur-modification of sorbents can greatly enhance Hg sorption capacity - by forming low solubility HgS (cinnabar). However, S-modified sorbents are not considered suitable for soil remediation due to the economic cost and secondary environmental impacts of sorbents such as granulated activated carbon (GAC), and the toxicity of S-modifiers such as thiol compounds...
December 1, 2017: Science of the Total Environment
Divine Angela D Genuino, Mark Daniel G de Luna, Sergio C Capareda
Biochar produced from the slow pyrolysis of municipal solid waste was activated with KOH and thermal treatments to enhance its surface and adsorptive properties. The effects of KOH concentration, activation temperature and time on the specific surface area (SSA) of the activated biochar were evaluated and optimized using central composite design (CCD) of the response surface methodology (RSM). Results showed that the activation of biochar enhanced its SSA from 402.8 ± 12.5 to 662.4 ± 28.6 m2 g-1...
November 30, 2017: Waste Management
Hyun Min Jang, Yong-Keun Choi, Eunsung Kan
Effects of dairy manure-derived biochar (M-BC) on methane production in anaerobic digestion (AD) of dry dairy manure were investigated with three different concentrations of biochar (0, 1 and 10 g/L) and temperatures (psychrophilic, 20 °C; mesophilic, 35 °C; thermophilic, 55 °C). Compared with the AD without any biochar, the cumulative methane and yield in the AD with 10 g/L biochar were increased to 27.65% and 26.47% in psychrophilic, 32.21% and 24.90% in mesophilic and 35.71% and 24.69% in thermophilic digestions...
November 27, 2017: Bioresource Technology
Yaoyao Yi, Caiting Li, Lingkui Zhao, Xueyu Du, Lei Gao, Jiaqiang Chen, Yunbo Zhai, Guangming Zeng
A series of low-cost Cu-Mn-mixed oxides supported on biochar (CuMn/HBC) synthesized by an impregnation method were applied to study the simultaneous removal of formaldehyde (HCHO) and elemental mercury (Hg0) at 100-300° C from simulated flue gas. The metal loading value, Cu/Mn molar ratio, flue gas components, reaction mechanism, and interrelationship between HCHO removal and Hg0 removal were also investigated. Results suggested that 12%CuMn/HBC showed the highest removal efficiency of HCHO and Hg0 at 175° C corresponding to 89%and 83%, respectively...
December 2, 2017: Environmental Science and Pollution Research International
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