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响,同时研究砷的氧化浸出动力学. 1 实验 1.1 实验原料及试剂 原料为某炼锌厂提供的含砷钴镍干渣,其成分如表1所示.从表1可以看出,渣中主要成分为铜47.27%,砷10.67%(质量分数). 表1 含砷渣的主要元素含量 Table 1 Arsenic residue content of main elements (mass fraction, %) 从原料的XRD谱(见图1)可见,原料中铜锌钴镍元素主要以氧化亚铜,氧化铜,氧化钴和铜砷合金存在,由文献[14]得知,渣中砷主要以砷铜,砷镍,砷钴合金存在,但从图1中只发现了砷铜合金,其原因可能是渣中的钴,镍含量少,形成的合金在XRD检测中无法被检测到. 图1 含砷渣的XRD谱 Fig. 1 XRD pattern of arsenic residue 实验所用到......
, Central South University, Changsha 410083, China Received 8 November 2017; accepted 15 March 2018 Abstract: Scorodite (FeAsO4·2H2O) is the most popular phase for arsenic (As) immobilization while... and promising As-bearing phase in environmental applications. Key words: arsenic; iron; crystal; arsenic immobilization; hazardous wastes 1 Introduction Arsenic (As) is a notorious environmental......
:1672-7207(2012)05-1610-06 Thermodynamics analysis on removal of arsenic from ammonium molybdate solution by chemical precipitation with magnesium salt YANG Liang, ZHAO Zhong-wei, HE Li-hua, HUO Guang... treatment of Ni-Mo ore contains high arsenic. Thermodynamic analysis of removing arsenic from the ammonium molybdate solution with addition of MgCl2 was studied. According to the principle......
J. Cent. South Univ. (2017) 24: 1537-1543 DOI: 10.1007/s11771-017-3558-x Optimization on selenium and arsenic conversion from copper anode slime by low-temperature alkali fusion process GUO Xue-yi... selenium and arsenic in copper anode slime (CAS) by low-temperature alkali fusion process. Central composite design was employed to optimize the effective parameters, in which NaOH/CAS mass ratio, fusion......
; 文献标识码:A 文章编号:1672-7207(2008)02-0268-05 Alkaline leaching and leaching kinetics of arsenic sulfide residue BAI Meng, ZHENG Ya-jie, LIU Wan-yu, ZHANG Chuan-fu (School of Metallurgical Science and Technology, Central South University, Changsha 410083, China) Abstract: In order to utilize arsenic sulfide residue from......
J. Cent. South Univ. (2021) 28: 1901-1918 DOI: https://doi.org/10.1007/s11771-021-4738-2 Arsenic availability and transportation in soil-rice system affected by iron-modified biochar QIAN Zi-yan(钱子...-modified biochar (FeOS) is known to be effective at immobilization of arsenic (As) in soils. A pot experiment was conducted to investigate the effects of FeOS on As availability and ttransportation......
(granular adsorbents for arsenic removal, GAAR)的最佳工艺和除砷效果,通过正交试验优化制备工艺,利用扫描电镜与能谱分析(SEM-EDS),X线衍射(XRD)和比表面积分析技术(BET)对GAAR进行表征并考察其对As(Ⅲ)的吸附效果.研究结果表明:预热温度为180 ℃,预热时间为20 min,焙烧温度为350 ℃,焙烧时间为120 min为制备GAAR的最优条件... of granular adsorbents for arsenic removal made from backwashing residuals from deironing and demanganization biofilter ZENG Huiping1, LU Saisai1, CAO Ruihua1, YANG Hang2, LI Dong1, ZHANG Jie1, 2 (1. School......
硅钼蓝分光光度法测定三氧化二砷中二氧化硅谢辉1,赖心1,黄葡英1(1.广东省广州市广州有色金属研究院分析测试中心)摘 要:研究了在三氧化二砷中加入盐酸,加热除砷,所得残渣用氢氧化钠溶解,硝酸酸化后,以钼酸铵为显色剂,在pH 0.9条件下,硅与钼酸盐形成硅钼黄络合物,用硫酸提高酸度,以抗坏血酸为还原剂,使硅形成稳定的硅钼蓝络合物,采用分光光度法测定其中的二氧化硅含量.硅钼蓝络合物最大吸收波长位于813nm处.本法相对标准偏差(RSD)为1.6%~1.9%(n=6),测定结果与ICP-AES法的结果相一致.
for Slag of Arsenic and Soda QIU Yong-hai1, LU Bing-qiang2, CHEN Bai-zhen3, ZHONG Yu2, FU Wei1, YANG Yi-qian3 (1.School of Info-physics and Geomatics Engineering, Central South University, Changsha... of slag of arsenic and soda in smelting antimony at 80 ℃ for about 2 h, the mixture was filtered so as to remove the antimony. Then the liquid after removing antimony was blown by CO2 in order......
]. 图2 在渣场堆放的含砷石膏渣 Fig. 2 Arsenic bearing gypsum sludge in slag field 为确定含砷石膏渣危害性,取渣场中堆存的经自然风干的石膏渣,参照
