Adsorption of nitrate and phosphate ions using ZnCl2-activated biochars from phytoremediation biomasses

Author:

Sefatlhi Katlarelo Lenny1ORCID,Ultra Venecio U1ORCID,Stephen Majoni1ORCID,Oleszek Sylwia2,Manyiwa Trust1ORCID

Affiliation:

1. Botswana International University of Science and Technology, Department of Earth and Environmental Sciences, Botswana

2. Kyoto University, Department of Environmental Engineering, Kyoto, Japan

Abstract

Mishandling and disposal of post-harvested phytoremediation biomass results in secondary pollution. Biochar production is one of the available technologies for processing post-harvested phytoremediation biomasses. The main objective of this study was to assess the potential adsorption of PO43- and NO3- ions from a binary solution by ZnCl2-activated phytoremediation biochars. The biochars were activated using ZnCl2 and analyzed for specific surface area, pore size, volume, surface morphology, point of zero charges (pHpzc), surface functional groups, and elemental composition. Subsequently, the adsorption potential for PO43- and NO3- ions of the activated biochar was investigated. Activation of phytoremediation biochars led to the development of new micropores and increased specific surface area range from 1.62-4.72 m2 g-1 to 4.75- 55.50 m2 g-1. ZnCl2 activation reduced the pHpzc values of Cymbopogon citratus, Cymbopogon nardus, and Chrysopogon zizanioides biochars (BCL2, BCC2, and BCV2) from 9.75, 9.50, 9.62 to 5.72, 5.51, and 6.23, respectively. Activated Chrysopogon zizanioides biochar (ACBCV2), activated Cymbopogon nardus biochar (ACBCC2) and activated Cymbopogon citratus biochar (ACBCL2) showed maximum potential phosphate ion adsorption capacities of 115.70, 101.74, and 270.59 mg g-1, respectively. ACBCL2, ACBCC2, and ACBCV2 indicated maximum potential nitrate ion adsorption capacities of 155.78, 99.42, and 117.71 mg g-1. BCC2, BCL2, ACBCV1, ACBCV2, and ACBCC2 best fitted the Langmuir linear form 1 model during NO3- adsorption. The results obtained in this study showed that ZnCl2-activated phytoremediation biochars have the potential to remove PO4 3- and NO3- ions from PO4 3- and NO3- ions binary solution.

Publisher

Polish Academy of Sciences Chancellery

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3