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book2005593: ½ð±Ò+1, ¸ÐлÌṩ¼ìË÷ÐÅÏ¢ 2015-04-28 20:30:43
book2005593: ½ð±Ò+1, ¸ÐлÌṩ¼ìË÷ÐÅÏ¢ 2015-04-28 20:30:43
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Sorption of Atrazine in Tropical Soil by Biochar Prepared from Cassava Waste ×÷Õß eng, H (Deng, Hui)[ 1,2 ] ; Yu, HM (Yu, Huamei)[ 3 ] ; Chen, M (Chen, Miao)[ 4 ] ; Ge, CJ (Ge, Chengjun)[ 1,2 ]BIORESOURCES ¾í: 9 ÆÚ: 4 Ò³: 6627-6643 ³ö°æÄê: NOV 2014 ²é¿´ÆÚ¿¯ÐÅÏ¢ ÕªÒª Biochar (BC) is a carbonaceous and porous product generated from the incomplete combustion of biomass and has been recognized as an efficient adsorbent. This study evaluated the ability of BC to sorb atrazine pesticide in tropical soil, and explored potential environmental values of BC on mitigating organic micro-pollutants. BC was produced from cassava waste via pyrolyzation under oxygen-limiting conditions at 350, 550, and 750 degrees C (MS350, MS550, and MS750, respectively). Three biochars were characterized and investigated as sorbents for the removal atrazine from tropical soil. BC pyrolyzed at higher temperatures more quickly reached equilibrium. The pseudo-second-order model perfectly simulated the sorption kinetics for atrazine with the coefficients R-2 above 0.996, and the sorption amount at equilibrium (q(e)) was 0.016 mg/g for MS350, 0.025 mg/g for MS550 and 0.050 mg/g for MS750. The isotherms of MS350 displayed relatively linear behavior, whereas the sorption of atrazine on MS550 and MS750 followed a nonlinear isotherm. The sorption data were well described by the Freundlich model with logK(F) of 0.476 for MS350, 0.771 for MS550, 1.865 for MS750. A thermodynamic study indicated that the sorption of atrazine in BC-added soil was a spontaneous and endothermic process and was primarily controlled by physisorption. In addition, lower pH was conducive to the sorption of atrazine in BC-added soil. ¹Ø¼ü´Ê ×÷Õ߹ؼü´Ê:Sorption; Biochars; Cassava wastes; Atrazine; Paddy soil KeyWords Plus IFFERENT PYROLYTIC TEMPERATURES; FROGS XENOPUS-LAEVIS; ORGANIC-MATTER; CORN STRAW; STRUCTURAL-PROPERTIES; AQUEOUS-SOLUTIONS; CARBON NANOTUBES; ACTIVATED CARBON; ADSORPTION; ACID×÷ÕßÐÅÏ¢ ͨѶ×÷ÕßµØÖ·: Ge, CJ (ͨѶ×÷Õß) ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ Hainan Univ, Key Lab Protect & Dev Utilizat Trop Crop Germplas, Minist Educ, Haikou 570228, Peoples R China. µØÖ·: ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ [ 1 ] Hainan Univ, Key Lab Protect & Dev Utilizat Trop Crop Germplas, Minist Educ, Haikou 570228, Peoples R China ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ [ 2 ] Hainan Univ, Dept Environm Sci, Haikou 570228, Peoples R China ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ [ 3 ] China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China [ 4 ] Chinese Acad Trop Agr Sci, Inst Environm & Plant Protect, Haikou 571101, Peoples R China µç×ÓÓʼþµØÖ·:cjge3007@163.com »ù½ð×ÊÖúÖÂл »ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ National Natural Science Foundation of China 21367011 Open Fund Program of the Key Laboratory of Protection and Development Utilization of Tropical Crop Germplasm Resources (Hainan University), the Ministry of Education 2012hckled-5 Natural Science Fund Program of Hainan Province 413123 Midwest University MWECSP-RT08 ZXBJH-XK004 ZXBJH-XK005 ²é¿´»ù½ð×ÊÖúÐÅÏ¢ ³ö°æÉÌ NORTH CAROLINA STATE UNIV DEPT WOOD & PAPER SCI, CAMPUS BOX 8005, RALEIGH, NC 27695-8005 USA Àà±ð / ·ÖÀà Ñо¿·½Ïò:Materials Science Web of Science Àà±ð:Materials Science, Paper & Wood ÎÄÏ×ÐÅÏ¢ ÎÄÏ×ÀàÐÍ:Article ÓïÖÖ:English Èë²ØºÅ: WOS:000345396900068 ISSN: 1930-2126 ÆäËûÐÅÏ¢ IDS ºÅ: AU1RC Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 48 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0 |

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eng, H (Deng, Hui)[ 1,2 ] ; Yu, HM (Yu, Huamei)[ 3 ] ; Chen, M (Chen, Miao)[ 4 ] ; Ge, CJ (Ge, Chengjun)[ 1,2 ]