Results 61 to 70 of about 602 (143)

黄褐土与水稻田沙土对Mn(Ⅱ)和Ni(Ⅱ)的吸附

open access: yesShuitu Baochi Xuebao, 2017
为探明陕南矿区典型土壤(黄褐土和水稻田沙土)对Mn(Ⅱ)和Ni(Ⅱ)的吸附特性,采用振荡平衡法研究黄褐土与水稻田沙土对Mn(Ⅱ)和Ni(Ⅱ)的等温吸附过程,并用数学模型模拟其吸附动力学过程,结合红外光谱(FTIR)分析,探讨2种土壤吸附Mn(Ⅱ)和Ni(Ⅱ)的机理及其影响因素。结果表明:Mn(Ⅱ)和Ni(Ⅱ)在2种土壤中的吸附均在120 min达到平衡,黄褐土对于Mn(Ⅱ)和Ni(Ⅱ)的吸附能力远远高于水稻田沙土,黄褐土对Mn(Ⅱ)和Ni(Ⅱ)最大吸附量分别为2.12,1.19 mg/g,沙土对Mn(Ⅱ)
宋凤敏, 张兴昌, 葛红光
doaj  

植物修复对锰尾渣污染土壤特性的影响

open access: yesShuitu Baochi Xuebao, 2007
采用盆栽法研究栽培美洲商陆和大豆进行植物修复后,锰尾渣污染土壤特性的变化。栽培美洲商陆和大豆可增加土壤的碱解氮、速效磷、速效钾和有机质。栽培植物后,土壤pH值变化不显著,但土壤磷酸酶、尿酶、蛋白酶、蔗糖酶、硝酸还原酶和脱氢酶的活性都高于对照。栽培植物可影响土壤锰和镉的形态分布,降低土壤锰和镉总含量,减少土壤水溶性锰和镉含量。在锰尾渣污染区域,混种美洲商陆与大豆进行植物修复,改良土壤特性更佳。
向言词   +6 more
doaj   +2 more sources

[<i>In situ</i> monitoring and regulation of local reactive oxygen species levels to promote wound repair]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2022
Luo GX, Deng J.
europepmc   +1 more source

Lembrar é fácil, difícil é esquecer

open access: yesEXILIUM Revista de Estudos da Contemporaneidade
This article discusses Palestinian memories and exiles due to migration. Six Brazilian-Palestinian women exercise their right to narrate their experiences and record their individual memories. Connected by the Nakba, these memories are also collective.
Ashjan Sadique Adi   +2 more
openaire   +1 more source

有关棕釉中钙、镁、锰络合滴定法的改进

open access: yesDianci bileiqi, 1980
本文介绍在钙、镁、锰共存时,用加入三乙醇胺经空气氧化为锰(Ⅲ)TEA络合物,再加盐酸羟胺定量分解,及采用了EGTA,可避免用铜试剂分离及加入氰化钾,实现了钙、镁、锰的连续测定。
罗德楚
doaj  

Narrar é glosar, viver é narrar

open access: yesMatraga - Revista do Programa de Pós-Graduação em Letras da UERJ, 2016
O presente artigo analisa a colaboração de Dirce Côrtes Riedel para a recepção crítica de Guimarães Rosa, levando em conta a publicação de ensaios e livros dedicados à obra do autor. Acrescenta ainda o papel da intelectual na formação de professores e pesquisadores de várias universidades do país.
openaire   +3 more sources

生物活性炭去除水中铁锰的生物作用研究

open access: yesGongye shui chuli, 2010
以生物活性炭(BAC)技术处理铁锰模拟水,探讨活性炭(AC)去除铁锰时生物作用的存在性和贡献率,并优化反冲洗参数。结果表明:BAC对铁锰的去除效果优于AC,证明了存在生物作用;对铁的去除主要依靠化学氧化和物化作用,少部分依靠生物作用;而对锰的去除主要为生物作用;BAC滤柱反冲洗周期受季节影响较大,反冲洗历时以3.5~5.0 min为宜。
唐文伟   +4 more
doaj   +2 more sources

Home - About - Disclaimer - Privacy