本文選題：碳納米管 + 聚合氯化鋁��； 參考：《中國給水排水》2015年23期

【摘要】：碳納米管由于其特殊的吸附性能,對在天然水體中廣泛存在的腐殖酸(HA)具有良好的吸附性,可用于腐殖酸的去除。對不同DOC含量和p H值條件下碳納米管吸附去除腐殖酸以及使用碳納米管改性聚合氯化鋁(PACl)作混凝劑時(shí)混凝過程中絮體的形成與破碎進(jìn)行了研究。結(jié)果表明:當(dāng)水樣DOC為4 mg/L、p H值為7.5時(shí),使用不加碳納米管的PACl作混凝劑,投加量為0.1 mmol/L時(shí)沉后水DOC濃度達(dá)到最低。碳納米管對腐殖酸的吸附去除率隨p H值的升高而下降,隨碳納米管含量的增加而增加,吸附主要發(fā)生在前60 min內(nèi)。隨著DOC含量的升高,混凝過程對DOC的去除率下降。當(dāng)p H值為7.5、DOC為2 mg/L時(shí),碳納米管含量對于平衡時(shí)絮體的粒徑無明顯影響,但可以增加再生長后絮體粒徑,改善絮體的沉降性,提高混凝效果。
[Abstract]:Because of its special adsorption properties, carbon nanotubes (CNTs) have good adsorbability to humic acid (HA) widely existing in natural water, and can be used to remove humic acid. The formation and breakage of flocs in the coagulation process of carbon nanotubes (CNTs) by adsorption and removal of humic acid under different DOC contents and pH values and the use of carbon nanotubes (CNTs) modified polyaluminum chloride (PACL) as coagulant were studied. The results show that when the DOC of water sample is 4 mg / L ~ (-1) H = 7.5, the concentration of DOC in precipitated water is the lowest when the PACl without carbon nanotubes is used as coagulant and the dosage is 0.1 mmol/L. The removal rate of humic acid by carbon nanotubes decreased with the increase of pH and increased with the increase of carbon nanotubes content. The adsorption mainly occurred in the first 60 min. With the increase of DOC content, the removal rate of DOC decreased during coagulation. When pH value was 7.5? DOC = 2 mg/L, the content of carbon nanotubes had no obvious effect on the particle size of the flocs in equilibrium, but it could increase the particle size of the floc after growth, improve the sedimentation of the floc and improve the coagulation effect.
【作者單位】： 中國科學(xué)院生態(tài)環(huán)境研究中心環(huán)境水質(zhì)學(xué)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金杰出青年基金資助項(xiàng)目(51025830);國家自然科學(xué)基金青年基金資助項(xiàng)目(51008293、51578527、41201498);國家自然科學(xué)基金資助重點(diǎn)項(xiàng)目(51138008)
【分類號(hào)】：TU991.2

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