附件有色金属科学与工程.docVIP

无机盐改性麦糟对低浓度含砷水的吸附性能 陈云嫩1 王东霜1 梁礼明2 聂锦霞1 罗仙平1 江西理工大学资源与环境工程学院，江西赣州341000 江西理工大学与学院，江西赣州341000） 摘 要：废水排放已成为饮用水源最大的安全隐患之一.采用麦糟作为吸附剂，对低浓度含砷水进行试验研究.确定最佳改性条件为1.5 mol/L NaCl麦糟 g混合均匀，下改性1在pH值 (溶液pH 7)，改性麦糟投加量 g/L条件下，初始浓度为0. mg/L 的含砷水可在 min达到吸附平衡，《生活饮用水卫生标准》(GB5749-200)中砷0.01 mg/L)要求.考察了溶液共存阴离子对含砷水的NaCl改性麦糟处理含砷水源地水的效果. 关键词：麦糟；吸附；改性；含砷水 Sorption properties of low cententration arsenic in water with spent grains modified by inorganic salt Chen yunnen*1, Wang dongshuang1, Liang liming2, Nie jinxia1, Luo xianping1 (1. School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou,341000, China; 2. School of of Electrical Engineering and Automation, Jiangxi University of Science and Technology, Ganzhou,341000, China) Abstract: The outlet of wastewater containing arsenic nfluences the safety of drinking water. Using spent grains modified by inorganic salt as adsorbent to treat water containing arsenic was studied. The optimal modification conditions was the ratio of 1.5 mol/L NaCl to grains 1 L:100 g and mixed evenly and modification of 12 h at room temperature. Without adjusting the pH value (the solution pH was 7), when modified grains dosage was 5 g/L, the initial arsenic concentration 0.1 mg/L can reach the adsorption equilibrium at 60 min. And the arsenic in effluent can meet Standards for Drinking Water Quality (GB5749-85) 0.01 mg/L. The effect of coexisting anions on the arsenic adsorption by NaCl modified spent grains was investigated. And the validation of the NaCl modified spent grains treating actual arsenic-containing water was studied. Key words: spent grains; adsorption; modified by inorganic salt; water containing arsenic 0 前言 随着工业化进程的不断加快，全球范围内砷循环也不断加快，从而导致砷污染成为非常突出的全球环境问题[1].WHO [2]及欧洲、美国、日本等西方国家实行饮用水的最高允许含砷质量浓度 0.01 mg/L的标准，而我国自2007年7月1日实施的新国标《生活饮用水卫生标准》(GB5749-2006) []将饮用水中砷的标准限值从不超过 0.05 mg/L 提高到不超过0.01 mg/L.目前含砷废水的处理方法主要有[-11]：沉淀法、离子 基金项目：国家自然科学基金资助项目：去除水中微量As(Ⅲ)As(Ⅴ)的吸附剂制备及其构效关系研究；江西省自然科学基金项目：基于机器学习的改性麦糟吸附重金