陳志宇, 張玉玲, 司超群, 初文磊, 陳在星, 馮凱婕

(吉林大學(xué) 環(huán)境與資源學(xué)院, 水資源與環(huán)境研究所, 長春 130021)

1 實(shí) 驗(yàn)

1.1 儀器、 材料和試劑 722型紫外可見光分光光度計(jì)(上海洪紀(jì)儀器設(shè)備有限公司)； SPX-250-D型全溫振蕩培養(yǎng)箱(上海博迅實(shí)業(yè)有限公司). 火山渣采自東北地區(qū)某廠火山巖礦區(qū), 經(jīng)自然風(fēng)干、 去雜質(zhì)后, 過0.5～2 mm篩備用. 所用Na2SO4,CaCl2,MgCl2,NaCl,NaNO3,HCl,NaOH等無機(jī)試劑均為國產(chǎn)分析純試劑.

1.4 影響因素實(shí)驗(yàn)

2 結(jié)果與討論

圖1 吸附量與時(shí)間的關(guān)系Fig.1 Relationship between adsorption amount and time

對吸附過程進(jìn)行上述兩種吸附動(dòng)力學(xué)方程擬合, 結(jié)果如圖2所示. 由圖2可見, 準(zhǔn)二級擬合方程R2=0.987 5, 擬合效果更好, 吸附過程符合準(zhǔn)二級動(dòng)力學(xué)模型. 表明吸附過程受化學(xué)吸附機(jī)理控制, 涉及吸附劑與吸附質(zhì)之間的電子共用或電子轉(zhuǎn)移.

圖2 吸附動(dòng)力學(xué)的擬合結(jié)果Fig.2 Fitting results of adsorption kinetics

圖3 不同初始質(zhì)量濃度吸附量與時(shí)間的關(guān)系Fig.3 Relationship between adsorption amount and time of different initial mass concentrations

圖4 pH值與吸附量的關(guān)系Fig.4 Relationship between pH and adsorption amount

圖5 不同水化學(xué)離子對火山渣吸附的影響Fig.5 Effects of different hydrochemical ions on adsorption of S by scoria

綜上, 本文可得如下結(jié)論：

3) 火山渣可有效去除低溫水體中的硫酸鹽, 是經(jīng)濟(jì)、 有效、 生態(tài)安全型的天然硅酸鹽礦物材料.

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