Laboratory evaluation of alum, ferric and ferrous-water treatment residuals for removing phosphorous from surface water

被引：7

作者：

Carleton, George ^{[1
]}

Al Daach, Haidar ^{[1
]}

Cutright, Teresa J. ^{[1
]}

机构：

[1] Univ Akron, Dept Civil Engn, Akron, OH 44325 USA

来源：

HELIYON | 2020年 / 6卷 / 08期

关键词：

Water treatment residual; Phosphorus; Alum; Ferric chloride; Adsorption; Environmental engineering; Waste treatment; Water treatment; Environmental pollution; Water pollution; Chemical engineering; Environmental science; TREATMENT SLUDGE; PHOSPHATE; ADSORPTION; SORPTION; DESORPTION; SOILS;

D O I：

10.1016/j.heliyon.2020.e04681

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Numerous drinking water plants and agricultural wastewaters generate water treatment residuals (WTR) during coagulation processes. These WTRs may be effective at reducing nutrients entering waterways, thereby decreasing the potential formation of algal blooms. Of the WTRs used in this study, Al-based WTR (Al-WTR) was the most effective achieving a 20 degrees C cumulative adsorbed concentrations (qe) after 28 days of desorption of 63-76 mg PO4/ kg Al-WTR depending on the initial spiked concentration. When the isotherm temperature was 5 degrees C, Al-WTR effectiveness decreased. Ferric chloride WTR (Fe-WTR) was only effective when 0.6 mg/L of PO4 was spiked to surface water with 0.01 mg/PO4 stored at 20 degrees C yielding a 28 day cumulative qe 5.67 mg PO4/kg Fe-WTR. At 5 degrees C, the cumulative qe after extended desorption was 1-4.63 mg/kg Fe-WTR. Ferrous sulfate based WTR (Fe2-WTR) was not capable of adsorbing any additional PO4 regardless of the spiked concentration or temperature.

引用

页数：13

共 37 条

[1] Sludge quantification at water treatment plant and its management scenario [J].