本文選題：磁性膨潤(rùn)土 + 四環(huán)素�。� 參考：《精細(xì)化工》2017年10期

【摘要】：為了有效治理廢水中抗生素帶來(lái)的嚴(yán)重污染,并解決粉狀吸附劑的分離回收問(wèn)題,采用微波固液相合成法原位生成磁性膨潤(rùn)土(Magnetic bentonite,M-Bent),并進(jìn)行靜態(tài)吸附實(shí)驗(yàn),考察了M-Bent的投加量、抗生素溶液起始pH、金屬Cu2+以及腐殖酸(Humic acid,HA)對(duì)M-Bent去除四環(huán)素(Tetracycline,TC)廢水性能的影響,還對(duì)相應(yīng)的吸附動(dòng)力學(xué)和吸附等溫模型進(jìn)行擬合。結(jié)果表明:M-Bent的飽和磁化值是9.41 emu/g,能夠成功實(shí)現(xiàn)固液分離;M-Bent具有一定的熱穩(wěn)定性,可以在30~700℃內(nèi)保持結(jié)構(gòu)的穩(wěn)定;TC起始pH在3~9時(shí)M-Bent對(duì)其去除率均高達(dá)85%以上,說(shuō)明M-Bent吸附TC有很寬的pH適宜范圍;M-Bent在投加量為0.5 g/L時(shí),對(duì)質(zhì)量濃度為20 mg/L的TC溶液的處理效果可以達(dá)到91%的去除率;Cu2+濃度的升高會(huì)促進(jìn)M-Bent對(duì)TC的吸附,使吸附效率呈現(xiàn)小幅的上升趨勢(shì);而HA的共存則會(huì)抑制M-Bent對(duì)TC的吸附,隨著HA濃度的升高,M-Bent對(duì)TC的吸附呈現(xiàn)明顯的下降趨勢(shì);M-Bent吸附TC的過(guò)程符合準(zhǔn)二級(jí)動(dòng)力學(xué)模型,是一個(gè)先快速吸附再緩慢達(dá)到平衡的過(guò)程;吸附等溫模型的擬合結(jié)果符合Langmuir吸附模型,說(shuō)明TC在M-Bent的吸附過(guò)程是單分子層吸附,吸附容量Qm為147 mg/g。
[Abstract]:In order to effectively control the serious pollution caused by antibiotics in wastewater and to solve the problem of separation and recovery of powdered adsorbents, magnetic bentonite was synthesized by microwave solid-liquid phase synthesis in situ, and the static adsorption experiment was carried out, and the dosage of M-Bent was investigated. The effects of initial pH of antibiotic solution, metal Cu2 and humic acid (HA) on the removal of tetracycline (TCC) wastewater by M-Bent were studied. The adsorption kinetics and adsorption isotherm model were also fitted. The results show that the saturation magnetization value of the ratio M-Bent is 9.41 emu / g, and the solid liquid separation M-Bent has a certain thermal stability, and the removal rate of M-Bent in the initial pH range of 3 ~ 9 M-Bent can be maintained at 30 ~ 700 鈩，

本文編號(hào)：1951335