廢舊鋅錳電池生物淋濾-水熱法制備納米錳鋅鐵氧體
發(fā)布時間：2018-08-31 13:08
【摘要】：以氧化硫硫桿菌(A.thiooxidans)和氧化亞鐵鉤端螺旋菌(L.ferrooxidans)為混合淋濾菌株對廢舊鋅錳電池進行了生物浸提,并以獲取的淋濾液為前驅(qū)體,采用水熱法制備出系列錳鋅鐵氧體軟磁材料(Mn_(1-x)Zn_xFe_2O_4,x=0.2~0.8);結(jié)合X射線衍射(XRD)、掃描電鏡-能譜(SEMEDX)、振動樣品磁強計(VSM)、透射電鏡(TEM)、紅外光譜(FT-IR)、熱重-差熱分析(TG-DTA)等表征手段對制備材料的結(jié)構(gòu)、形貌、磁學(xué)性能和穩(wěn)定性進行分析.結(jié)果表明,在5%固液比(質(zhì)量體積比,5 g/100 mL,以下均表述為"5%固液比")下,經(jīng)過5 d的外源酸調(diào)控生物浸提,分別獲得了84.5%、63.2%的Zn、Mn浸出效率;當(dāng)Zn∶Mn∶Fe=0.4∶0.6∶2.0(物質(zhì)的量比,即x=0.4)時,制備的納米級Mn_(0.6)Zn_(0.4)Fe_2O_4性能最優(yōu),屬純相的立方尖晶石結(jié)構(gòu),顆粒分布均勻,飽和磁化強度(M_s)、剩余磁化強度(M_r)和矯頑力(H_c)分別為68.9 emu·g~(-1)、4.7 emu·g~(-1)和53.6 Oe,具有熱穩(wěn)定性和耐酸堿性,有望成為一種新型的水處理磁性材料.
[Abstract]:Thiobacillus oxide (A.thiooxidans) and helicobacter ferrooxidans (L.ferrooxidans) were used as the mixed elution strains to extract the waste Zn / mn batteries, and the leaching solution was used as the precursor. A series of MnZn ferrite soft magnetic materials (Mn_ _ (1-x) Zn_xFe_2O_4,x=0.2~0.8) were prepared by hydrothermal method, and their structures were characterized by X-ray diffraction (XRD),) (XRD), scanning electron microscope (XRD),) -energy dispersive (SEMEDX), magnetometer (VSM), transmission electron microscope (FT-IR), thermogravimetric differential thermal analysis (TG-DTA), etc. Morphology, magnetic properties and stability were analyzed. The results show that under the conditions of 5% solid-liquid ratio (mass / volume ratio less than 5 g / 100 mL, is expressed as "5% solid-liquid ratio"), after 5 days of biological extraction by exogenous acid, the leaching efficiency of Zn,Mn is 84.5% and 63.2%, respectively. The nanocrystalline Mn_ (0.6) Zn_ (0.4) Fe_2O_4 has the best performance, which belongs to the pure phase cubic spinel structure, the particle distribution is uniform, the saturation magnetization (Maps), the residual magnetization (Mr) and the coercivity (HSC) are 68.9 emu g ~ (-1) 4.7 emu g ~ (-1) and 53.6 Oe, respectively. It is expected to be a new magnetic material for water treatment.
【作者單位】： 延安大學(xué)石油工程與環(huán)境工程學(xué)院;
【基金】：陜西省高水平大學(xué)專項資金項目(No.2013SXTS03) 延安市科技創(chuàng)新團隊項目(No.2015CHTD-04) 延安大學(xué)博士科研啟動項目(No.YDBK2017);延安大學(xué)引導(dǎo)項目(No.YDY2017-10);延安大學(xué)校級大創(chuàng)項目(No.D2016042)~~
【分類號】：TM277;X705
[Abstract]:Thiobacillus oxide (A.thiooxidans) and helicobacter ferrooxidans (L.ferrooxidans) were used as the mixed elution strains to extract the waste Zn / mn batteries, and the leaching solution was used as the precursor. A series of MnZn ferrite soft magnetic materials (Mn_ _ (1-x) Zn_xFe_2O_4,x=0.2~0.8) were prepared by hydrothermal method, and their structures were characterized by X-ray diffraction (XRD),) (XRD), scanning electron microscope (XRD),) -energy dispersive (SEMEDX), magnetometer (VSM), transmission electron microscope (FT-IR), thermogravimetric differential thermal analysis (TG-DTA), etc. Morphology, magnetic properties and stability were analyzed. The results show that under the conditions of 5% solid-liquid ratio (mass / volume ratio less than 5 g / 100 mL, is expressed as "5% solid-liquid ratio"), after 5 days of biological extraction by exogenous acid, the leaching efficiency of Zn,Mn is 84.5% and 63.2%, respectively. The nanocrystalline Mn_ (0.6) Zn_ (0.4) Fe_2O_4 has the best performance, which belongs to the pure phase cubic spinel structure, the particle distribution is uniform, the saturation magnetization (Maps), the residual magnetization (Mr) and the coercivity (HSC) are 68.9 emu g ~ (-1) 4.7 emu g ~ (-1) and 53.6 Oe, respectively. It is expected to be a new magnetic material for water treatment.
【作者單位】： 延安大學(xué)石油工程與環(huán)境工程學(xué)院;
【基金】：陜西省高水平大學(xué)專項資金項目(No.2013SXTS03) 延安市科技創(chuàng)新團隊項目(No.2015CHTD-04) 延安大學(xué)博士科研啟動項目(No.YDBK2017);延安大學(xué)引導(dǎo)項目(No.YDY2017-10);延安大學(xué)校級大創(chuàng)項目(No.D2016042)~~
【分類號】：TM277;X705
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