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Journal of Environmental Sciences 2020年第2期32卷 209-216页

作者： Chao Ren Yongbo Qi Guoyong huang Shiyuan Yao Jinwei You hongqing hu Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River) Ministry of AgricultureCollege of Resources and EnvironmentHuazhong Agricultural UniversityWuhan 430070China

Cell wall polysaccharides play a vital role in binding with toxic metals such as copper(Cu)***, it is still unclear whether the major binding site of Cu in the cell wall varies with different degrees of Cu ***, the contribution of each cell wall polysaccharide fraction to Cu sequestration with different degrees of Cu stresses also remains to be *** distribution of Cu in cell wall polysaccharide fractions of castor(Ricinus communis L.) root was investigated with various Cu concentrations in the hydroponic *** results showed that the hemicellulose1(HC1) fraction fixed 44.9%–67.8% of the total cell wall Cu under Cu *** addition, the pectin fraction and hemicelluloses2(HC2) fraction also contributed to the Cu binding in root cell wall,accounting for 11.0%–25.9% and 14.1%–26.6% of the total cell wall Cu under Cu treatments, *** the Cu levels were ≤ 25 μmol/L, pectin and HC2 contributed equally to Cu storage in root cell ***, when the Cu level was higher than 25 μmol/L, the ability of the pectin to bind Cu was easy to reach *** more Cu ions were bound on HC1 and HC2 fractions, and the HC2 played a much more important role in Cu binding than *** fourier transform infrared(FT-IR) and twodimensional correlation analysis(2 D-COS) techniques, the hemicellulose components were showed not only to accumulate most of Cu in cell wall, but also respond fastest to Cu stress.

关键词： Copper Cell wall Hemicellulose Pectin Two-dimensional correlation spectroscopy

Mechanism of lead immobilization by oxalic acid-activated phosphate rocks

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Journal of Environmental Sciences 2012年第5期24卷 919-925页

作者： Guanjie Jiang Yonghong Liu Li huang Qingling Fu Youjun Deng hongqing hu College of Resources and Environment Huazhong Agricultural University Wuhan 430070 China Department of Soil and Crop Sciences College of Agriculture and Life Sciences Texas A & M University College Station TX 77843 USA

Lead （Pb） chemical fixation is an important environmental aspect for human health. Phosphate rocks （PRs） were utilized as an adsorbent to remove Pb from aqueous solution. Raw PRs and oxalic acid-activated PRs （APRs） were used to investigate the effect of chemical modification on the Pb-binding capacity in the pH range 2.0-5.0. The Pb adsorption rate of all treatments above pH 3.0 reached 90%. The Pb binding on PRs and APRs was pH-independent, except at pH 2.0 in activated treatments. The X-ray diffraction analysis confirmed that the raw PRs formed cerussite after reacting with the Pb solution, whereas the APRs formed pyromorphite. The Fourier Transform Infrared spectroscopy analysis indicated that carbonate （CO32-） in raw PRs and phosphate （PO43-） groups in APRs played an important role in the Pb-binding process. After adsorption, anomalous block-shaped particles were observed by scanning electron microscopy with energy dispersive spectroscopy. The X-ray photoelectron spectroscopy data further indicated that both chemical and physical reactions occurred during the adsorption process according to the binding energy. Because of lower solubility of pyromorphite compared to cerussite, the APRs are more effective in immobilizing Pb than that of PRs.

关键词： Pb activated phosphate rocks oxalic acid immobilization

Immobilization of lead in anthropogenic contaminated soils using phosphates with/without oxalic acid

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Journal of Environmental Sciences 2015年第2期27卷 64-73页

作者： Xiaojuan Su Jun Zhu Qingling Fu Jichao Zuo Yonghong Liu hongqing hu Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River) Ministry of Agriculture College of Resources and Environment Huazhong Agricultural University

Understanding the effects of oxalic acid（OA） on the immobilization of Pb（Ⅱ） in contaminated soils by phosphate materials, has considerable benefits for risk assessment and remediation strategies for the soil. A series of phosphate amendments with/without oxalic acid were applied to two anthropogenic contaminated soils. We investigated the immobilization of Pb（Ⅱ） by KH2PO4, phosphate rock（PR）, activated phosphate rock（APR） and synthetic hydroxyapatite（HAP） at different phosphate：Pb（P：Pb） molar ratios（0, 0.6, 2.0 and 4.0） in the presence/absence of 50 mmol oxalic acid/kg soil, respectively. The effects of treatments were evaluated using single extraction with deionized water or Ca Cl2, Community Bureau of Reference（BCR） sequential extraction and toxicity characteristic leaching procedure（TCLP）methods. Our results showed that the concentration of water extractable, exchangeable and TCLP-Pb all decreased with incubation time. The concentration of water-extractable Pb after120 days was reduced by 100% when soils were amended with APR, HAP and HAP ＋ OA, and the TCLP-Pb was 〈5 mg/L for the red soil at P：Pb molar ratio 4.0. Water-soluble Pb could not be detected and the TCLP-Pb was 〈5 mg/L at all treatments applied to the yellow-brown soil. BCR results indicated that APR was most effective, although a slight enhancement of water-soluble phosphate was detected at the P：Pb molar ratio 4.0 at the beginning of incubation. Oxalic acid activated phosphates, and so mixing insoluble phosphates with oxalic acid may be a useful strategy to improve their effectiveness in reducing Pb bioavailability.

关键词： Soil lead remediation Toxicity characteristics leaching procedure(TCLP) Phosphorous materials Oxalic acid Lead fraction

Efficiency of KOH-modified rice straw-derived biochar for reducing cadmium mobility, bioaccessibility and bioavailability risk index in red soil

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Pedosphere 2020年第6期30卷 874-898页

作者： Saqib BASHIR Qaiser huSSAIN Jun Zhu Qingling FU David HOUBEN hongqing hu Key Laboratory of Arable Land Conservation Middle and Lower Reaches of Yangtse RiverMinistry of AgricultureCollege of Resources and EnvironmentHuazhong Agricultural UniversityWuhan 430070China Department of Soil and Environmental Science Ghazi UniversityDera Ghazi Khan 32200Pakistan Department of Soil Science&SWC PMAS-Arid Agriculture UniversityRawalpindi 46300Pakistan AGHYLE UniLaSalleBeauvais 60011France

Cadmium(Cd)pollution in agricultural soils has exerted a serious threat due to continuous application of pesticides,fertilizers,and wastewater *** present study aimed to test the efficiency of KOH-modified and non-modified rice straw-derived biochar(KBC and BC,respectively)for reducing Cd solubility and bioavailability in Cd-contaminated ***-contaminated soil was incubated for 60 d with 15 and 30 g kg-1 BC and *** the end of incubation,Cd mobility was estimated by the European Community Bureau of Reference sequential extraction and toxicity characteristic leaching procedure(TCLP),while bioavailability was determined using 1 molL-1 NH4NO3 *** bioavailability risk index and bioaccessibility,assessed by a simple bioaccessibility extraction test,of Cd were used to examine the potential effects of Cd on living *** results indicated that application of both KBC and BC significantly increased soil p H,cation exchange capacity,nutrients,and organic *** soluble fraction of Cd was significantly decreased by 30.3%and 27.4%,respectively,with the addition of KBC and BC at 30 g kg-1 compared to the control(without biochar addition).Similarly,the bioaccessible Cd was significantly decreased by 32.4%and 25.2%,respectively,with the addition of KBC and BC at 30 g kg-1 compared to the *** addition,both KBC and BC significantly reduced Cd leaching in the TCLP and NH4NO3-extractable Cd in the amended soil compared to the *** reduction in Cd solubility and bioaccessibility by KBC and BC may be due to significant increases in soil pH and surface ***,KBC at an application rate of 30 g kg-1 demonstrated positive results as soil amendment for Cd immobilization,and reduced bioaccessible Cd in contaminated soil.

关键词： bioaccessible Cd Cd fractionation Cd immobilization NH4NO3-extractable Cd sequential extraction soilpH

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论我国中小企业绿色物流和绿色营销

中国市场 2007年第23期 18-19页

作者：胡红青三峡大学经济与管理学院

我国中小企业在发展初期大多以牺牲自然资源和生态环境为代价换取利润的增长。在如今大力建设可持续发展社会的背景下,我国广大企业为了适应社会环境变化、谋求自身长远发展,必须尽快实施绿色营销和绿色物流。本文通过对现行中小企业实... 详细信息

我国中小企业在发展初期大多以牺牲自然资源和生态环境为代价换取利润的增长。在如今大力建设可持续发展社会的背景下,我国广大企业为了适应社会环境变化、谋求自身长远发展,必须尽快实施绿色营销和绿色物流。本文通过对现行中小企业实施绿色物流和绿色营销存在的问题进行分析,提出了实施绿色物流和绿色营销的相应对策。

关键词：绿色物流绿色营销中小企业

几种有机酸对恒电荷和可变电荷土壤吸附Cu^(2+)的影响

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土壤学报 2005年第2期42卷 232-237页

作者：胡红青刘华良贺纪正华中农业大学资源与环境学院武汉430070

以恒电荷土壤(黄褐土和黄棕壤)和可变电荷土壤(红壤和砖红壤)为供试材料,研究了乙酸、草酸、酒石酸和柠檬酸对土壤吸附重金属铜离子(Cu2 + )的影响。结果表明,在相同酒石酸浓度下,土壤对酒石酸的吸附量依次为黄棕壤(2 1 8mmolkg-1) >红... 详细信息

以恒电荷土壤(黄褐土和黄棕壤)和可变电荷土壤(红壤和砖红壤)为供试材料,研究了乙酸、草酸、酒石酸和柠檬酸对土壤吸附重金属铜离子(Cu2 + )的影响。结果表明,在相同酒石酸浓度下,土壤对酒石酸的吸附量依次为黄棕壤(2 1 8mmolkg-1) >红壤(15 4mmolkg-1) >砖红壤(9 5mmolkg-1) ,土壤吸附有机酸后负电荷量增加,相同条件下增幅为砖红壤>红壤>黄棕壤;无有机酸配体时,供试土壤对Cu2 + 的吸附量为黄褐土>黄棕壤>砖红壤>红壤;加入有机酸时,随有机酸浓度增高,土壤对Cu2 + 的吸附一般表现为“峰”形曲线,峰所对应的有机酸浓度因有机酸类型而异,且随土壤可变电荷性质增强而增高;土壤吸附有机酸后对Cu2 + 的次级吸附不同于有机酸与铜共存时的竞争吸附,且因土壤性质表现迥异。这些结果意味着在存在有机酸配体的根际环境中,恒电荷土壤与可变电荷土壤对Cu2 + 的吸附明显不同。

关键词：砖红壤可变电荷土壤黄棕壤有机酸恒电荷土壤土壤吸附黄褐土 Cu^2+ 重金属离子吸附量

中南地区几种地带性土壤表面电荷特性与pH的关系

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华中农业大学学报 2005年第1期24卷 29-32页

作者：廖丽霞胡红青贺纪正华中农业大学资源与环境学院

　用改进的Schofield法、盐滴定法等方法研究测定了我国中南地区 5种不同地带性土壤的表面电荷特性。结果表明: 1)在同一pH条件下,土壤负电荷量由北向南呈递减趋势,正电荷量呈递增趋势,与供试土壤粘土矿物、铁铝氧化物组成及含量有关; 2... 详细信息

　用改进的Schofield法、盐滴定法等方法研究测定了我国中南地区 5种不同地带性土壤的表面电荷特性。结果表明: 1)在同一pH条件下,土壤负电荷量由北向南呈递减趋势,正电荷量呈递增趋势,与供试土壤粘土矿物、铁铝氧化物组成及含量有关; 2)砖红壤中负电荷以可变负电荷为主,棕红壤和红壤既有较大数量的可变负电荷,并含有一定数量的永久负电荷,黄褐土和黄棕壤负电荷量随pH的变化较小; 3)供试土壤的PZC从北到南逐渐升高,砖红壤的PZNC为 4. 2,其它土壤在试验pH范围内不存在PZNC。

关键词：恒电荷土壤可变电荷土壤粘土矿物表面电荷特性

K^+浓度、pH和离子强度对湖北省几种土壤吸附K^+的影响

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华中农业大学学报 1999年第3期18卷 229-233页

作者：胡红青贺纪正高彦征华中农业大学农业部亚热带土壤资源与环境重点实验室

用平衡吸附法研究了湖北省５种类型土壤对Ｋ＋的吸附特征，探讨了溶液Ｋ＋浓度、ｐＨ值及离子强度对土壤吸附Ｋ＋的影响。结果表明：（１）土壤对Ｋ＋的吸附量随溶液中Ｋ＋浓度升高而增加，支持电解质的阳离子可同时被吸附，对Ｋ＋吸附... 详细信息

用平衡吸附法研究了湖北省５种类型土壤对Ｋ＋的吸附特征，探讨了溶液Ｋ＋浓度、ｐＨ值及离子强度对土壤吸附Ｋ＋的影响。结果表明：（１）土壤对Ｋ＋的吸附量随溶液中Ｋ＋浓度升高而增加，支持电解质的阳离子可同时被吸附，对Ｋ＋吸附的机制有电性作用和矿物对Ｋ＋的选择性吸附；（２）ｐＨ值升高，Ｋ＋的吸附量增加，在供试ｐＨ范围内，增幅为２１．３％～４０．２％，单位ｐＨ变化对Ｋ＋吸附量的影响为０．５９～１．４３ｍｍｏｌ／ｋｇ；（３）离子强度由０．０１增至０．２０时，Ｋ＋吸附量降低２２．５％～５５．４％；（４）以上因子的影响程度因土壤而明显不同，主要取决于其矿物组成和表面电荷性质。

关键词：土壤吸附 pH值离子强度钾离子

有机酸对针铁矿和膨润土吸附Cd^(2+)、Pb^(2+)的影响

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土壤学报 2006年第1期43卷 98-103页

作者：黄丽王茹胡红青李学垣华中农业大学资源与环境学院武汉430070

用平衡吸附法研究了不同浓度的有机酸(乙酸、酒石酸和柠檬酸)对针铁矿和膨润土吸附Cd2+、Pb2+的影响。结果表明:(1)低浓度(1.0 mmol L-1)有机酸对Pb2+吸附的抑制作用比对Cd2+的强。有机酸浓度的变化对针铁矿Cd2+、Pb2+吸附率的影响大于... 详细信息

用平衡吸附法研究了不同浓度的有机酸(乙酸、酒石酸和柠檬酸)对针铁矿和膨润土吸附Cd2+、Pb2+的影响。结果表明:(1)低浓度(1.0 mmol L-1)有机酸对Pb2+吸附的抑制作用比对Cd2+的强。有机酸浓度的变化对针铁矿Cd2+、Pb2+吸附率的影响大于对膨润土的。(2)不同Cd2+浓度下,有机酸对膨润土Cd2+吸附强度的影响大于针铁矿。加入高浓度Cd2+(8.0 mmol L-1)时,低浓度有机酸对膨润土吸附Cd2+的促进作用比加入低浓度Cd2+(0.4 mmol L-1)时明显,高浓度有机酸对膨润土吸附Cd2+的抑制作用与低浓度Cd2+时相近。(3)低浓度有机酸(1.0 mmol L-1)时,针铁矿对Cd2+的吸附都趋于稳定,而柠檬酸对膨润土吸附Cd2+的抑制作用比乙酸和酒石酸的明显。不同种类有机酸下,矿物对Pb2+吸附率大小的变化基本一致。

关键词：有机酸针铁矿膨润土 Cd^2+,Pb^2+ 吸附

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有机酸对恒电荷土壤表面电荷性质的影响

土壤学报 2005年第5期42卷 866-870页

作者：廖丽霞胡红青贺纪正华中农业大学资源与环境学院

低分子量有机酸在土壤中随着各种有机物的分解和生物的生命活动不断形成、转化并累积,形成一些较高浓度的有机酸微区,影响养分的生物有效性和根际系统中的物质循环.随着根际化学的兴起,根际土壤化学和元素行为越来越引起广大土壤科学工... 详细信息

低分子量有机酸在土壤中随着各种有机物的分解和生物的生命活动不断形成、转化并累积,形成一些较高浓度的有机酸微区,影响养分的生物有效性和根际系统中的物质循环.随着根际化学的兴起,根际土壤化学和元素行为越来越引起广大土壤科学工作者的关注[1～6].

关键词：恒电荷土壤有机酸表面电荷