引用本文:[点击复制]
[点击复制]
【打印本页】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览次   下载 本文二维码信息
码上扫一扫!
铁改性微米竹炭处理农村低浓度磷污水的技术优化
张蓉,范宇,王丽君,施艳红,潘丹丹,储茵
0
(安徽农业大学资源与环境学院,合肥 230036)
摘要:
为解决农村含低浓度磷污水缺乏深度处理、竹炭去除水中磷时粒径(PZ)较大、起始浓度(C0)和投加量配比(dosing ratio,DR)高、处理接触时间(t)长等问题,将常规尺寸竹炭加工到微米范畴(0.45~75 µm)并进行铁改性,制备铁改性微米竹炭(MBC-Fe);采用红外光谱、扫描电镜等表征MBC-Fe理化性质,模拟MBC-Fe吸附水中低浓度水平磷的吸附等温线模型;优化吸附条件后,应用MBC-Fe吸附去除农村含低浓度磷污水。结果显示:改性后的竹炭微孔体积增大,表面官能团发生变化;吸附等温线可回归Brunauer-Emmett-Teller (BET)模型;针对C0 = 0.5 ~ 1.5 mg·L -1的低水平含磷水,优化的MBC-Fe处理条件是在投加量配比DR = 1:200(g:mL),接触处理时间t = 0.25 ~ 0.5 h时,去除率可达90.0% ~ 96.7 %,磷残留低至0.05 mg·L -1;当C0 = 0.51 ~ 0.58 mg·L -1时,DR最低为1:1 000 (g:mL), 接触时间0.5 h,去除率可达60.26% ~ 71.02 %,处理后可达到Ⅲ类地表水的含磷要求。
关键词:  铁改性微米竹炭  吸附  磷去除  优化
DOI:10.13610/j.cnki.1672-352x.20220106.007
投稿时间:2020-11-06
基金项目:安徽省自然科学基金(1908085MD102, 2008085MB45)和安徽省科技攻关项目(19252013)共同资助。
Optimization of technique for removal of low-level phosphorus from countryside water by iron-modified micro-bamboo charcoal
ZHANG Rong,FAN Yu,WANG Lijun,SHI Yanhong,PAN Dandan,CHU Yin
(School of Resources and Environment, Anhui Agricultural University, Hefei 230036)
Abstract:
As the shortage of the deep treatment of phosphorus in countryside wastewater, and the requirement of the regular particle size (PZ), high initial concentration (C0), and high dosing ratio (DR) resulting the limitation of bamboo charcoal application, this work processed the commercial BC (>5 mm) into the micron BC (MBC) scaled from 0.45 µm to 75 µm, modified MBC by iron Fe3+ to prepare the adsorbents of iron-modified micron-bamboo charcoal(MBC-Fe), and characterized the physic-chemical properties, so as to optimize the adsorption of phosphorus by MBC-Fe, especially the low-concentration phosphorus in water, simulated adsorption isotherm, and applied to the treatment of the real environmental water. The results indicated that the modification changed the micro-structure and surface properties of BC. The adsorption could be simulated and fitted BET adsorption isotherm. For water with the initial concentration of (C0 ) from 0.5 to 1.5 mg·L-1, the optimized adsorption were that when the dosing ratio (DR) was 1:200 (g:mL) and the contacted time (t) was 0.25 - 0.5 h, the rate of phosphors removal reached 90.0% - 96.7%,which the residue of phosphorus was lower to 0.05 mg·L-1 ; when the initial concentration of (C0 ) was 0.51 - 0.58 mg·L-1, the removal rate was 60.26% - 71.02 % even though DR lowered to 1:1 000(g:mL)and contacted time (t) was 0.5 h, and the water reached the class Ⅲ of National Surface Water Quality Standard.
Key words:  iron-modified micron-bamboo charcoal  adsorption  phosphorus removal  optimization

用微信扫一扫

用微信扫一扫