什么是“可持续修复”（sustainable remediation）的原则？
What are the principles of 'sustainable remediation'?
在修复污染的同时核算自身能耗、排放与二次影响，追求净环境效益最大：优先低风险自然衰减、原位技术，避免“为清污而制造更多排放”的尴尬。
It accounts for the remediation's own energy, emissions and secondary impacts, maximizing net environmental benefit: prefer low-risk natural attenuation and in-situ methods, avoiding 'cleaning soil by creating more emissions'.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#土壤修复 #可持续 #净效益
土壤中重金属的生物有效性为何取决于其化学形态而非总量？
Why does the bioavailability of heavy metals in soil depend on chemical speciation rather than total content?
可交换态与碳酸盐结合态重金属易被植物吸收，而残渣态被晶格固定、几乎不迁移。因此同样总浓度的土壤，可提取态比例高者生态风险更大，风险评估需采用连续提取法分级。
Exchangeable and carbonate-bound fractions are readily taken up by plants, whereas residual fractions are locked in mineral lattices and barely mobile. So at equal total concentration, soils with a higher extractable fraction pose greater ecological risk; risk assessment uses sequential extraction to speciate.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
《环境科学》土壤重金属形态分析论文
Environmental Science journal — soil heavy-metal speciation article
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787030120038（豆瓣书目条目: 环境科学）
#重金属形态 #生物有效性 #连续提取
生物炭改良土壤修复重金属污染的作用机制是什么？
What are the mechanisms by which biochar amendment remediates heavy-metal contamination in soil?
生物炭比表面积大、表面带负电荷并含丰富含氧官能团，可通过吸附、沉淀和离子交换将重金属固定为难溶形态，降低其生物有效性。其效果受原料与热解温度影响，长期稳定性仍在研究中。
Biochar has high specific surface area, negative surface charge and abundant oxygen-containing functional groups, fixing heavy metals into insoluble forms via adsorption, precipitation and ion exchange, lowering bioavailability. Effects depend on feedstock and pyrolysis temperature, and long-term stability is still under study.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Nature Sustainability 生物炭土壤修复研究
Nature Sustainability — biochar soil remediation study
#生物炭 #吸附 #重金属固定
什么是“电动力学修复”和“热脱附”，各适合什么污染？
What are electrokinetic remediation and thermal desorption, and what pollutants suit each?
电动力学在土壤中加电场，驱动带电离子（如重金属、某些有机物）向电极迁移被抽出，适合低渗透黏土。热脱附加热土壤使挥发性有机物汽化分离，适合石油、溶剂等有机污染。
Electrokinetics applies an electric field to drive charged ions (metals, some organics) to electrodes for extraction—good for low-permeability clay. Thermal desorption heats soil so volatile organics vaporize and separate—suited to petroleum or solvent contamination.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#土壤修复 #电动力学 #热脱附
电动修复技术去除土壤重金属的基本原理是什么？
What is the basic principle of electrokinetic remediation for heavy metals in soil?
在污染土壤两端施加直流电场，使带电重金属离子在电迁移和电渗流作用下向电极区富集，再集中收集处理。该技术对细粒低渗透土壤效果好，但能耗与电极腐蚀是工程化瓶颈。
Applying a DC electric field across contaminated soil drives charged metal ions toward electrodes by electromigration and electroosmosis, where they are collected and treated. It works well in fine, low-permeability soils, but energy use and electrode corrosion limit scale-up.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
《环境科学》土壤电动修复研究
Environmental Science journal — electrokinetic remediation study
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787030120038（豆瓣书目条目: 环境科学）
#电动修复 #电迁移 #重金属
什么是“植物修复”（phytoremediation）？
What is phytoremediation?
利用超富集植物吸收、转化或固定土壤中的重金属与有机污染物，之后收割处理植物体，逐步降低污染。成本低但对深层或高浓度污染效果有限。
Hyperaccumulator plants take up, transform or immobilize heavy metals and organics in soil; the plants are then harvested and disposed, gradually reducing contamination. Low cost but limited for deep or highly concentrated pollution.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#土壤修复 #植物修复 #重金属
为何 DDT 等有机氯农药在环境中难以降解且能远距离传输？
Why are organochlorine pesticides such as DDT persistent and capable of long-range transport?
DDT 化学结构稳定、脂溶性强，在环境中半衰期可达数年，并借助大气和洋流从低纬使用区迁移到极地，在食物链高端生物体内生物放大。斯德哥尔摩公约已将其列为首批受控持久性有机污染物。
DDT is chemically stable and highly lipophilic, with an environmental half-life of years, and it migrates via atmosphere and oceans from low-latitude use areas to the poles, biomagnifying in top predators. The Stockholm Convention lists it among the first controlled persistent organic pollutants.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Rachel Carson,《Silent Spring》Houghton Mifflin,1962;中译《寂静的春天》上海译文出版社,2011
R. Carson, Silent Spring, Houghton Mifflin, 1962; Chinese ed. Shanghai Translation Publishing House, 2011
#DDT #持久性有机污染物 #生物放大
土壤与地下水中六价铬与三价铬的毒性为何差异巨大？
Why do hexavalent and trivalent chromium differ so greatly in toxicity?
六价铬（Cr(VI)）可透过细胞膜并在体内被还原产生活性氧，具强氧化性与致癌性；三价铬（Cr(III)）是人和动物必需的微量元素且难被吸收。治理上常通过还原把 Cr(VI) 转化为低毒的 Cr(III) 再沉淀去除。
Hexavalent chromium (Cr(VI)) crosses cell membranes and generates reactive oxygen species upon reduction, making it strongly oxidizing and carcinogenic, whereas trivalent chromium (Cr(III)) is an essential trace element and poorly absorbed. Remediation often reduces Cr(VI) to low-toxic Cr(III) before precipitation.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
《环境科学》铬污染修复论文
Environmental Science journal — chromium remediation article
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787030120038（豆瓣书目条目: 环境科学）
#六价铬 #三价铬 #毒性差异
什么是“生物堆”（biopile）修复？
What is biopile remediation?
将污染土壤堆成垛并强制通风、补菌补营养，促进好氧微生物降解石油等有机物，常用于加油站、油库场地，可控且周期较短。
Contaminated soil is piled with forced aeration and added microbes/nutrients to boost aerobic degradation of oils and organics—common at fuel stations and depots; controllable with shorter duration.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
左玉辉 主编,《环境学》第2版,高等教育出版社,2009
Zuo Yuhui ed., Environmental Science, 2nd ed., Higher Education Press, 2009
独立核验依据 · Independent verification: 核验依据 2 DOUBAN ISBN 标识 9787040283327（按标识回读: 环境学）
#土壤修复 #生物堆 #有机污染
土壤中多环芳烃（PAHs）的主要人为来源有哪些？
What are the main anthropogenic sources of polycyclic aromatic hydrocarbons (PAHs) in soil?
化石燃料不完全燃烧、机动车尾气、焦化与冶炼等工业活动是土壤 PAHs 的主要来源，常以高低环混合物形式沉降累积。PAHs 具有致癌性且难降解，是优先控制的有毒污染物。
Incomplete fossil-fuel combustion, vehicle exhaust and industrial activities such as coking and smelting are the main soil PAHs sources, depositing as mixtures of low- and high-ring compounds. PAHs are carcinogenic, persistent and listed as priority toxic pollutants.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#多环芳烃 #PAHs #工业污染
蜈蚣草等超富集植物如何用于土壤砷污染的植物修复？
How do hyperaccumulators such as Pteris vittata enable phytoremediation of arsenic-contaminated soil?
蜈蚣草可将土壤中的砷大量吸收并积累于地上部而不表现毒害，收获地上部分即移除污染物。相比客土法，植物修复成本低、扰动小，但周期长且需妥善处理富集后的植物残体。
Pteris vittata takes up large amounts of arsenic and stores it in its shoots without toxicity, so harvesting the aerial biomass removes the contaminant. Compared with soil replacement, phytoremediation is cheaper and less disruptive but slower, and the arsenic-rich biomass must be disposed of safely.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
《环境科学》植物修复技术论文
Environmental Science journal — phytoremediation article
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787030120038（豆瓣书目条目: 环境科学）
#植物修复 #超富集 #砷
稻田土壤镉污染通过什么途径进入稻米并威胁食品安全？
Through what pathway does cadmium from paddy soil enter rice grain and threaten food safety?
水稻根系可从镉污染稻田土壤吸收镉离子并经木质部转运富集于籽粒，使稻米成为人群镉暴露的主要膳食来源；氧化（落干）条件下土壤镉有效性更高，而长期淹水可降低其有效性。长期摄入损害肾近曲小管并影响骨代谢，Codex 为此设定了稻米镉限量（0.4 mg/kg）。
Rice roots absorb cadmium ions from contaminated paddy soil and translocate them via xylem to the grain, making rice a major dietary cadmium source for humans; Cd bioavailability is higher under aerobic (drained) conditions, while prolonged flooding lowers it. Chronic intake damages renal proximal tubules and bone metabolism, prompting Codex to set a cadmium limit (0.4 mg/kg) for rice.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Zhao 等, 2015, Molecular Plant 8:27-39（水稻镉吸收转运综述）及 CODEX STAN 193-1995 稻米镉限量
Zhao et al., 2015, Molecular Plant 8:27-39 (Cd uptake and transport in rice); CODEX STAN 193-1995 cadmium limit for rice
#镉污染 #稻米 #食品安全
重金属超标农田里,固化稳定化与植物修复两条技术路线在见效周期、成本结构和后续土地用途上的区别究竟在哪里?
On farmland exceeding heavy-metal thresholds, what really separates stabilization-induced immobilization from phytoextraction in turnaround time, cost structure, and permissible land use afterwards?
固化稳定化向土壤施加石灰、羟基磷灰石类钝化剂,数月内即可压低镉铅的生物有效性,投入低,但金属总量不变,地块只能转入安全利用类别。植物修复依托蜈蚣草、伴矿景天等超积累植物逐年带出金属,周期动辄五到十年,却能实际削减存量并保住耕作能力。风险分级管理通常把前者安排给重污染点位,后者用于大面积轻中度超标区。
Stabilization blends lime or hydroxyapatite-type amendments into the soil, cutting cadmium and lead bioavailability within months at modest cost, yet total metal stocks remain untouched and the parcel can only move into safe-utilization categories. Phytoextraction relies on hyperaccumulators such as Pteris vittata and Sedum plumbizincicola to strip metals year after year, taking five to ten years or longer but genuinely depleting the stock while preserving cropping capacity. Risk-tiered programs typically assign the former to heavily polluted hotspots and the latter to broad fields with light-to-moderate exceedances.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
生态环境部《农用地土壤环境管理办法(试行)》;2014年《全国土壤污染状况调查公报》
Ministry of Ecology and Environment, Measures for Environmental Management of Agricultural Land Soil (Trial); National Survey Bulletin on Soil Pollution, 2014
#土壤修复 #重金属
棕地再开发领域,依据未来用途实施风险管控的思路为何逐步取代了一律清理到区域背景值的修复目标设定方式?
In brownfield redevelopment, how did the idea of risk-based control keyed to future land use gradually replace the practice of remediating every site back to regional background concentrations?
把每个地块都清挖到背景值在经济与技术上近乎不可行,多种元素的天然本底本身就随地域剧烈波动,大规模开挖还会带来扬尘与地下水扰动等二次影响。基于风险的路线先界定未来暴露情景,居住用地标准远严于仓储用地,再倒推出可接受的残留浓度,允许以防渗阻隔、制度约束和长期监测替代彻底清除。我国土壤污染防治法与美国超级基金风险评估导则均采纳了这一逻辑。
Excavating every parcel back to background values proves nearly unworkable economically and technically, since natural background itself swings sharply across regions and wholesale digging adds secondary impacts like dust plumes and groundwater disturbance. The risk-based route first pins down the future exposure scenario, residential standards running far tighter than warehouse ones, then works backward to acceptable residual concentrations, allowing impermeable caps, institutional controls, and long-term monitoring in place of total removal. Both China's Soil Pollution Prevention and Control Law and the US EPA's Superfund risk assessment guidance embrace this logic.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
《中华人民共和国土壤污染防治法》,2019年施行;美国EPA超级基金风险评估导则(RAGS)
Soil Pollution Prevention and Control Law of the People's Republic of China, effective 2019; US EPA Risk Assessment Guidance for Superfund (RAGS)
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787516218846（豆瓣书目条目: 中华人民共和国土壤污染防治法）；本条出处含多部著作，此标识
#棕地再开发 #风险管控
对镉超标稻田施用石灰及硅钙类钝化材料时,为什么必须同步监测土壤pH与有效态镉含量?
Why must soil pH and bioavailable cadmium be monitored side by side when lime and silicate-calcium amendments are applied to paddy fields exceeding Cd limits?
石灰与硅钙材料抬升pH,促使镉向碳酸盐结合态与铁锰氧化物结合态转化,生物有效性下降,糙米含镉量随之降低。但pH上调过快会连带压制磷素与部分微量元素的有效性,而且停止施用后存在镉活度反弹的风险。只有把pH、DTPA可提取态镉与糙米镉三项指标放在一起跟踪,才能动态校准投加量并防止仅凭全量作出的误判。
Raising pH shifts cadmium into carbonate-bound and Fe-Mn oxide-bound fractions, cutting its bioavailability and with it the Cd load in brown rice. Yet too rapid a pH climb also suppresses phosphorus and several micronutrients, and activity can rebound once applications cease. Tracking pH, DTPA-extractable Cd and brown-rice Cd together is what allows dosage to be recalibrated dynamically and guards against verdicts based on total concentration alone.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
《土壤环境质量 农用地土壤污染风险管控标准(试行)》(GB 15618-2018,以DTPA提取态镉判定风险);Bolan N.S.等,《污染土壤重金属(类金属)修复——活化还是钝化?》
GB 15618-2018 (agricultural land soil pollution risk control standard, DTPA-extractable Cd criterion); Bolan N.S. et al., Remediation of heavy metal(loid)s contaminated soils - to mobilize or to immobilize?
#钝化修复 #生物有效性