铅对铁铝复合氧化物吸附铜的影响
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摘要
复合氧化物对环境中的金属离子具有较高的吸附容量。但2种或多种金属离子共存条件下,复合氧化物的吸附行为仍缺乏全面的了解。本文通过批吸附试验方法,研究溶液中有无Pb~(2+)共存时,铁铝复合氧化物对Cu~(2+)吸附容量的影响。结果表明,当溶液中不存在Pb~(2+)时,Cu~(2+)在铁铝复合氧化物表面的Qmax为149.08 mg·g~(-1)。当溶液中Pb~(2+)和Cu~(2+)共存时,Cu~(2+)的Qmax降低到28.81 mg·g~(-1)。在pH值3～7的范围内,随着溶液pH值的升高,Cu~(2+)在铁铝复合氧化物表面的吸附量呈现逐渐增加的趋势。此外在相同的pH值条件下,Pb~(2+)的存在减少了吸附在氧化物表面的Cu~(2+)量。存在或不存在Pb~(2+)的情况下,Cu~(2+)在氧化物表面上的吸附动力学均遵循Elovich方程,并且在约120 min时达到吸附平衡。
Binary oxide have a strong adsorption capacity for heavy metals. But the adsorption behavior of binary oxide was unclear,when there were more than two heavy metals exist. In this paper, the adsorption of Cu~(2+)by Fe-Al binary oxide in the presence of Pb~(2+)were studied by batch adsorption experiment. Results showed that the maximum adsorption amounts of Cu~(2+)by Fe-Al binary oxide at 25 ℃ were 149.08 mg·g~(-1). The maximum adsorption capacity of Cu~(2+)reduced to 28.81 mg·g~(-1) when Pb~(2+)was introduced into the solution. In the range of pH 3～7, adsorption amount of Cu~(2+)by Fe-Al binary oxide increased with solution pH increasing. Cu~(2+)adsorption kinetics on Fe-Al binary oxides was in accordance with the Elovich equation, and the adsorption capacity reached the adsorption equilibrium at about 120 min.
Binary oxide have a strong adsorption capacity for heavy metals. But the adsorption behavior of binary oxide was unclear,when there were more than two heavy metals exist. In this paper, the adsorption of Cu~(2+)by Fe-Al binary oxide in the presence of Pb~(2+)were studied by batch adsorption experiment. Results showed that the maximum adsorption amounts of Cu~(2+)by Fe-Al binary oxide at 25 ℃ were 149.08 mg·g~(-1). The maximum adsorption capacity of Cu~(2+)reduced to 28.81 mg·g~(-1) when Pb~(2+)was introduced into the solution. In the range of pH 3～7, adsorption amount of Cu~(2+)by Fe-Al binary oxide increased with solution pH increasing. Cu~(2+)adsorption kinetics on Fe-Al binary oxides was in accordance with the Elovich equation, and the adsorption capacity reached the adsorption equilibrium at about 120 min.
引文
[1]ZHOU Q, LIAO B, LIN L, et al. Adsorption of Cu(II)and Cd(II)from aqueous solutions by ferromanganese binary oxide-biochar composites[J]. Science of the total environment,2018(615):115-122.
[2]CHANG F F, QU J H, LIU R P, et al. Practical performance and its efficiency of arsenic removal from groundwater using Fe-Mn binary oxide[J].Journal of environmental sciences, 2010,22(1):1-6.
[3]梁美娜,刘海玲,朱义年.复合铁铝氧化物的制备及其对水中砷(Ⅴ)的去除[J].环境科学学报, 2006,23(3):438-446.
[4]陈云,于永鲜,张金利,等.铁氧化物改性黏土对Cr(Ⅵ)的吸附性能[J].环境科学学报, 2011, 31(5):905-911.
[5]左卫元,黄汉猛,蒋小龙.铁/铝复合氧化物对氟离子的吸附[J].水资源与水土工程学报, 2016,27(4):110-112.
[6]LING L L, LIU W J, ZHANG S,et al. Magnesium oxide embedded nitrogen self-doped biochar composites:Fast and high-efficiency adsorption of heavy metals in an aqueous solution[J]. Environmental science and technology, 2017,51(17):10081-10089.
[7]任丽英,赵敏,董玉良,等.两种铁氧化物对土壤有效态汞的吸附作用研究[J].环境科学学报, 2014,34(3):749-753.
[8]侯秀云. Fe-Mn硅基介孔吸附剂的制备及其对水中芘和铜的共去除研究[D].北京:中国地质大学, 2017.
[9]任丽英,马家恒,徐振,等.铁铝复合氧化物对土壤Mn、Pb和Cd有效性的影响[J].矿物学报, 2014, 34(3):396-400.
[10]孙丽蓉,王旭刚,高翔.有机质和铁氧化物对水稻土吸附Cd2+的贡献[J].河南农业科学,2010(4):57-61.
[11]武玫玲,陈家坊.土壤对铜离子专性吸附特性的初步研究[J].环境化学, 1983,2(1):63-70.
[12]王砚,谭文峰,冯雄汉,等.水钠锰矿对几种重金属离子的吸附及其与锰氧化度和吸附位点的关系[J].环境科学,2011,32(10):3128-3136.
[13]MUSTAFA G, SINGH B, RAI S. Cadmium adsorption and desorption behaviour on goethite at low equilibrium concentrations-effects of pH and index cations[J].Chemosphere,2004,57:1325-1333.
[14]UWAMARIYA V, PETRUSEVSKI B, LENS P, et al.Effect of pH and calcium on the adsorptive removal of cadmium and copper by iron oxide-coated sand and granular ferric hydroxide[J]. Journal of environmental engineering, 2016,142(9):4015-4019.
[2]CHANG F F, QU J H, LIU R P, et al. Practical performance and its efficiency of arsenic removal from groundwater using Fe-Mn binary oxide[J].Journal of environmental sciences, 2010,22(1):1-6.
[3]梁美娜,刘海玲,朱义年.复合铁铝氧化物的制备及其对水中砷(Ⅴ)的去除[J].环境科学学报, 2006,23(3):438-446.
[4]陈云,于永鲜,张金利,等.铁氧化物改性黏土对Cr(Ⅵ)的吸附性能[J].环境科学学报, 2011, 31(5):905-911.
[5]左卫元,黄汉猛,蒋小龙.铁/铝复合氧化物对氟离子的吸附[J].水资源与水土工程学报, 2016,27(4):110-112.
[6]LING L L, LIU W J, ZHANG S,et al. Magnesium oxide embedded nitrogen self-doped biochar composites:Fast and high-efficiency adsorption of heavy metals in an aqueous solution[J]. Environmental science and technology, 2017,51(17):10081-10089.
[7]任丽英,赵敏,董玉良,等.两种铁氧化物对土壤有效态汞的吸附作用研究[J].环境科学学报, 2014,34(3):749-753.
[8]侯秀云. Fe-Mn硅基介孔吸附剂的制备及其对水中芘和铜的共去除研究[D].北京:中国地质大学, 2017.
[9]任丽英,马家恒,徐振,等.铁铝复合氧化物对土壤Mn、Pb和Cd有效性的影响[J].矿物学报, 2014, 34(3):396-400.
[10]孙丽蓉,王旭刚,高翔.有机质和铁氧化物对水稻土吸附Cd2+的贡献[J].河南农业科学,2010(4):57-61.
[11]武玫玲,陈家坊.土壤对铜离子专性吸附特性的初步研究[J].环境化学, 1983,2(1):63-70.
[12]王砚,谭文峰,冯雄汉,等.水钠锰矿对几种重金属离子的吸附及其与锰氧化度和吸附位点的关系[J].环境科学,2011,32(10):3128-3136.
[13]MUSTAFA G, SINGH B, RAI S. Cadmium adsorption and desorption behaviour on goethite at low equilibrium concentrations-effects of pH and index cations[J].Chemosphere,2004,57:1325-1333.
[14]UWAMARIYA V, PETRUSEVSKI B, LENS P, et al.Effect of pH and calcium on the adsorptive removal of cadmium and copper by iron oxide-coated sand and granular ferric hydroxide[J]. Journal of environmental engineering, 2016,142(9):4015-4019.