Research progress in cleaning and efficient remediation of heavy, toxic, lead-contaminated soil [PDF]
, 2022 With the rapid development of industrialization and human civilization, the soil polluted by heavy, toxic lead is becoming increasingly severe worldwide. Thus, it is imperative to control soil pollution due to lead. In this paper, the background, status,
Guang-hua LU +5 more
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Phytoaccumulation of heavy metals by terrestrial plants around vanadium smelters [PDF]
, 2016 Twenty-nine species samples of higher plants which belong to twenty families and seven soil samples were collected from a vanadium smelter. The contents of heavy metals in the native plants and soil were analyzed by ICP-MS and ICP-OES.
CHEN Si +5 more
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Shuitu Baochi Xuebao, 2022 针对镉砷复合污染土壤中小麦籽粒重金属积累问题,采用生物模拟方法,以镉砷复合污染区土壤为研究对象,探究杏核生物炭(C1和C2分别表示3%和6%生物炭添加量)对复合污染土壤—小麦/玉米系统中镉砷累积和转运的影响。结果表明:添加生物炭(C1、C2)显著降低了小麦季根际/非根际土壤Cd、As有效性,并且小麦籽粒中Cd、As含量分别比CK平均降低19.25%和50.70%,但前者差异不显著。对玉米而言,生物炭C1、C2处理显著降低穗中Cd和As含量,降幅分别为85.67%,61.28%和98.36%,96.48%;
周昶 +5 more
doaj
Passivation Effect of Thiol-Modified Montmorillonite on Cadmium in Medium-Alkaline Farmland Soil in Northern China [PDF]
Passivation material is a key material for repairing heavy metal contaminated soil in farmland. To study and develop efficient soil heavy metal passivator, thiol-modified montmorillonite was studied.
Chao REN +5 more
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Shuitu 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
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Physiological, biochemical, and molecular mechanisms of cadmium enrichment in hyperaccumulator plants [PDF]
With industrial development, the concentration of heavy metals such as cadmium (Cd), lead (Pb), mercury (Hg), and zinc (Zn) in soil has increased significantly owing to human activities.
Bo CAO +6 more
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基于复合钝化剂施用植物轮作模式对农田土壤Cd和As污染的修复
Shuitu Baochi Xuebao, 2022 镉(Cd)和砷(As)是土壤环境中广泛存在的重金属污染物,具有不可降解性和生物累积性的特点,应及时开展Cd和As污染的修复工作。研究以湖南中、轻度Cd和As污染农田土壤为对象,选取当地优势植物。通过田间试验,添加生物炭与纳米零价铁的复合钝化剂,利用不同植物(油菜-蚕豆、玉米-苎麻)配套种植模式,探讨基于复合钝化剂施用植物轮作模式对土壤中Cd和As污染的修复效果。结果表明:(1)间作种植模式(蚕豆-油菜、玉米-苎麻)更有利于土壤中Cd和As的固定,试验土壤中Cd和As的最佳固定效果依次为原供试土壤的45 ...
张红娟 +4 more
doaj
Cadmium Accumulation and its Control Measure of Common Vegetable in Xiamen [PDF]
, 2012 农产品质量安全近年来成为社会关注和舆论热点，蔬菜安全从广义上包含蔬菜产量、食用卫生又营养、种植环境可持续等三方面。蔬菜源头的生产环境决定蔬菜的安全，而环境污染已从城市扩散到农村，全国2×107hm2耕地正在受到重金属污染的威胁。镉（Cd）有很强的生物毒性，一旦污染很难清除，其中毒效应可在20～30年后表现出来。 环境中Cd毒性不仅与其总量有关，还与植物的特性和生长环境相关。 有关Cd在蔬菜上累积，目前的研究涉及蔬菜种类较少，主要为叶菜类，而且缺乏处理时间较长的系统研究，尤其缺乏Cd在花菜类、根菜类 ...
汤惠华
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Environmental Adsorption Behavior of Biochar and its Application in Remediation of Cadmium Contaminated Soil [PDF]
, 2014 镉是生物毒性最强的重金属元素之一，在土壤中的化学活性强、毒性持久，容易通过食物链的富集作用危害人类健康。土壤重金属镉污染形势十分严峻，2014年4月公布的全国土壤污染状况调查公报显示，镉的点位超标率最高，正式被确定为中国土壤的首要污染物，迫切需要有效的土壤镉污染治理和控制技术。生物炭因其具有发达的孔隙结构，表面含有大量的官能团和负电荷，对重金属离子有较强的吸附和固定能力，并且能够通过改变土壤理化性质，增强土壤对重金属镉的络合能力，有效地降低土壤镉污染程度，减轻重金属对作物生长的毒性作用 ...
丁华毅
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Research Progress of Different Types of Microorganisms Passivation and Fixation of Cadmium Contamination [PDF]
This is an article in the field of ecological restoration of mines. In recent years, the microbial passivation and fixation has gradually become a hotspot in the field of heavy metal contamination control.
Feng LAI +3 more
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