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Production of biochars from Ca impregnated ramie biomass (Boehmeria nivea (L.) Gaud.) and their phosphate removal potential

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WOS被引频次:28
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成果类型:
期刊论文
作者:
Liu, Shao-bo;Tan, Xiao-fei*;Liu, Yun-guo*;Gu, Yan-ling;Zeng, Guang-ming;Hu, Xin-jiang;Wang, Hui;Zhou, Lu;Jiang, Lu-hua;Zhao, Bin-bin
通讯作者:
Tan, Xiao-fei;Liu, Yun-guo
作者机构:
[Liu, Shao-bo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.
[Liu, Shao-bo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.
[Zhou, Lu; Gu, Yan-ling; Zhao, Bin-bin; Jiang, Lu-hua; Liu, Yun-guo; Wang, Hui; Tan, Xiao-fei; Hu, Xin-jiang; Zeng, Guang-ming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Zhou, Lu; Gu, Yan-ling; Zhao, Bin-bin; Jiang, Lu-hua; Liu, Yun-guo; Wang, Hui; Tan, Xiao-fei; Hu, Xin-jiang; Zeng, Guang-ming] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.
通讯机构:
[Tan, XF; Liu, YG] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Tan, XF; Liu, YG] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.
语种:
英文
期刊:
RSC Advances
ISSN:
2046-2069
年:
2016
卷:
6
期:
7
页码:
5871-5880
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:化学;WOS学科类别:Chemistry, Multidisciplinary
入藏号:
WOS:000368941700086;EI:20160501873594
机构署名:
本校为第一机构
院系归属:
冶金与环境学院
建筑与艺术学院
摘要:
This work explored the efficiency and mechanisms of phosphate (P) removal by Ca-impregnated biochar prepared from CaCl2-pretreated ramie stem (Ca-RSB) and ramie bark (Ca-RBB). The properties of Ca-modified biochar were analyzed using elemental analysis, scanning electron microscopy (SEM), BET specific surface analysis, energy-dispersive X-ray analysis (EDS), Fourier transform infrared (FTIR) and a zeta potential meter. The results of characterization suggested that the Ca-RSB had a much higher H/C ratio, total pore volume, BET surface area and more functional groups compared with pristine biochar (RSB). In addition, a higher yield of Ca-RSB (50.8%) than RSB (28.0%) was also observed. Comparison experiments suggested that Ca-RSB showed higher adsorption capacity than Ca-RBB and the adsorption amount of Ca-RSB was more than two-folds that of RSB. Adsorption experimental data fitted well with pseudo-second order kinetics and the Langmuir isotherm. The intra-particle diffusion and Boyd's film-diffusion models revealed that the rate-controlled step was controlled by film-diffusion initially and then followed by intra-particle diffusion. Electrostatic attraction served as the main force to adsorb phosphates at a lower pH, and the precipitation and surface deposition took over at higher pH. The results of this study indicated that Ca-RSB is a potential effective and low-cost adsorbent for phosphate removal from wastewater.
参考文献:
Agrafioti E, 2014, J ENVIRON MANAGE, V146, P444, DOI 10.1016/j.jenvman.2014.07.029
Aguayo-Villarreal IA, 2014, J MOL LIQ, V196, P326, DOI 10.1016/j.molliq.2014.04.008
Ai LH, 2011, J CHEM ENG DATA, V56, P4217, DOI 10.1021/je200743u
BARBAUX Y, 1992, APPL CATAL A-GEN, V90, P51, DOI 10.1016/0926-860X(92)80247-A
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