腐殖酸对蒙脱石吸附镉离子的影响机理研究

实验研究了腐殖酸存在下重金属元素镉(Cd2 )在蒙脱石表面的吸附过程,对比研究了两种不同腐殖酸对吸附机理的影响。结果表明,重金属离子在蒙脱石表面的吸附作用受介质pH的影响。加入腐殖酸后吸附产生滞后现象,蒙脱石先吸附腐殖酸,之后转变为腐殖酸和蒙脱石共同吸附Cd2 作用,吸附量较单独吸附过程更大。吸附机理与腐殖酸的投加量和投加方式有关。     

互花米草厌氧发酵渣活性炭处理含镉废水的研究

采用静态吸附法,进行磷酸活化法不同剂料质量比（0.5～3.0）及活化温度（400～700℃）条件下制备的互花米草厌氧发酵渣活性炭对镉的吸附性能研究,考察不同初始浓度条件下活性炭对镉的平衡吸附量,旨在以吸附法治理含镉废水,探索吸附机理、影响因素、除镉吸附剂的最佳制备条件以及活性炭物化性质对镉吸附性能的影响。结果表明,镉的吸附性能与活性炭的制备条件有关,随着活化温度的升高,镉的吸附量逐渐增大,主要是因为高温条件下活性炭表面PO34-充当活性位点,促进镉的吸附。当剂料质量比为1.0,活化温度为700℃时,制备出的活性炭对镉的吸附性能最好,其最大吸附量可达38.91mg·g^-1,远远高于商业活性炭。镉的吸附量随着溶液初始浓度的增加而增大,吸附等温线符合Langmuir方程。溶液pH和活性炭表面化学性质是决定镉吸附量大小的决定性因素,当溶液pH在2～4时,各活性炭对镉的吸附能力随pH的增加而增加。本文为含镉废水的处理提供了一种低价高效的方法。     

有机修饰改性土对镉离子的吸附及温度效应

主要研究了以不同比例十六烷基三甲基溴化铵(CTMAB)单一修饰和十六烷基三甲基溴化铵 十二烷基磺酸钠(CTMAB SDS)混合修饰的土耕层、黏化层土样对重金属镉离子的吸附。结果表明:吸附量顺序分别为耕层原土(GCK) >CTMAB5 0 %修饰改性土(5 0GCB) >CTMAB10 0 % SDS2 0 %修饰改性土(12 0GCS) >CTMAB10 0 %修饰改性土(10 0GCB)和粘化层原土(NCK) >CTMAB5 0 %修饰改性土(5 0NCB) >CTMAB10 0 %修饰改性土(10 0NCB) >CTMAB10 0 % SDS2 0 %修饰改性土(12 0NCS)的顺序,表明以表面修饰剂修饰土表面,确实存在着使得镉离子吸附能力减弱的趋势,但并未使修饰改性土完全丧失对于镉离子的吸附能力;吸附等温线可以用Langmuir方程描述;热力学参数的研究表明Cd2 吸附反应是熵增控制的自发性过程,但在探讨吸附自发性和最大吸附量关系时应考虑土壤本身的容量性质。机理研究认为,表面修饰剂对土壤表面的修饰改性是不均匀的,阳离子交换吸附和疏水键键合两种机制的竞争性吸附是修饰改性土壤依然具有对镉离子吸附作用的原因。土耕层各改性土样对Cd2 吸附的温度效应明显高于粘化层土样,证实了耕层对镉离子的化学吸附作用强于粘化层的结果     

重金属复合处理对小麦锌铜镍镉积累和分布的影响

为增加粮食可食用部分有益元素的浓度,同时减少有毒重金属元素的含量,需要更好地了解元素在植株和籽粒内的运输和分布。在温室盆栽条件下,以春小麦为供试材料,设置对照（不添加重金属）和重金属复合处理（同时添加铜、锌、镍、镉,以不影响小麦生长为前提）,研究锌（Zn）、铜（Cu）、镍（Ni）、镉（Cd）在成熟植株和籽粒不同部位的分布特点。结果表明,重金属复合处理对小麦成熟期籽粒和秸秆产量、收获指数以及粒重均无显著影响,但使小麦各器官重金属浓度均显著增加,增幅因不同器官和不同元素而异,籽粒中Zn、Cu、Ni和Cd浓度分别增加1.8、0.5、48.1倍和45.3倍。重金属复合处理还显著改变了Zn和Ni在地上部各器官中的分配模式：对照小麦吸收的Zn更易向生殖器官中转运,处理植株则更多地滞留在营养器官中,而Ni呈相反的趋势。激光剥蚀电感耦合等离子体质谱仪（LA-ICP-MS）对籽粒糊粉层和胚乳的定量分析表明,重金属复合处理使糊粉层Zn和Cu浓度仅增加了78%和86%,而糊粉层Ni和Cd浓度分别增加了30倍和121倍。重金属复合处理使胚乳Zn和Cu浓度分别增加了49%和48%,使Ni和Cd浓度均超出小麦标准中Ni和Cd的最大允许浓度（对照籽粒胚乳中没有检验到Ni和Cd）。以上结果表明,在小麦生物强化实践中,在增加有益营养元素（如Cu和Zn）的同时亦存在有毒重金属（如Ni和Cd）超标的巨大风险。     

磁性玉米秸秆生物炭对水体中Cd的去除作用及回收利用

以农田生态系统废弃农作物秸秆资源化利用为前提,以生物炭去除水体重金属镉(Cd)污染及其回收利用为目的,该文以500℃裂解的原始玉米秸秆生物炭(MSB,maize straw biochar)和磁性玉米秸秆生物炭(MMSB,magnetic maize straw biochar)试验材料,在2种生物炭的表面性状进行表征的基础上,探究了不同吸附条件下生物炭对污染水体中Cd(Ⅱ)的吸附去除作用及其回收利用的可能性。结果表明:MSB和MMSB对Cd(Ⅱ)的吸附量在pH值为5时达到最大,其最大吸附量分别为27.52和33.45 mg/g;当MSB和MMSB添加量为1.4和0.8 g/L时,对Cd(Ⅱ)的去除率分别可达85.15%和95.48%;Langmuir方程能更好地模拟等温吸附行为,MSB和MMSB达到平衡时的最大吸附容量分别为26.03和43.45 mg/g,趋近实际值;动力学数据与二级动力学方程拟合度更高,MSB和MMSB的平衡吸附量Qe理论值分别为13.42和24.31 mg/g;MMSB对其表面吸附Cd(Ⅱ)的解吸率均显著低于MSB。磁性生物炭对Cd(Ⅱ)的吸附效率和固着能力增强可能与其较高的pH值、更大的比表面积、更多的极性含氧官能团有关。此外,在外部存在磁场的情况下,磁性生物炭可以通过磁力作用加以回收再利用。研究成果对促进农业废弃物的资源化利用以及水体环境中重金属净化技术的进步均有重要意义。     

镉污染水稻秸秆生物炭对土壤中镉稳定性的影响

中国农田土壤镉等重金属污染问题突出,对其生产过程中产生的镉污染水稻秸秆进行无害化和资源化利用研究具有重要意义。该研究通过连续提取试验、风险评价指数法、吸附动力学/热力学、土柱试验,以及X射线衍射分析、傅里叶变换红外光谱分析等手段,探究了不同热解温度下制备的镉污染水稻秸秆生物炭对土壤中Cd的稳定特性。研究结果表明,镉污染水稻秸秆热解制备的生物炭可有效吸附土壤镉。热解温度显著影响生物炭对Cd的吸附能力（P<0.05）,高温生物炭对Cd吸附容量大,700 ℃下制备的生物炭对Cd的吸附容量可达72.57 mg/g。生物炭对Cd的吸附主要通过含氧官能团表面络合和碳酸盐共沉淀吸附,其吸附过程符合Langmuir方程和准二级动力学模型,吸附过程受化学速率控制。土柱试验表明,镉污染水稻秸秆生物炭能有效降低土壤Cd的下渗迁移能力,其作用机制主要是将土壤Cd从酸可提取态转化为残渣态,施入高温生物炭的土壤中Cd的残渣态比例最高。上述结果表明,热解可有效处理镉污染水稻秸秆,制备的生物炭可用于Cd等重金属污染土壤的稳定修复,有效解决镉污染水稻秸秆的潜在二次污染问题并实现其安全利用。     

黄褐土与水稻田沙土对Mn(Ⅱ)和Ni(Ⅱ)的吸附

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120min达到平衡,黄褐土对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)的最大吸附量分别为2.12,1.19mg/g,沙土对Mn(Ⅱ)和Ni(Ⅱ)的最大吸附量为1.32,0.78mg/g;准一级动力学模型、双常数模型和内扩散模型均适合于表征Mn(Ⅱ)和Ni(Ⅱ)的吸附动力学特征,黄褐土吸附动力学特性的模型吻合度高于水稻田沙土;Langmuir吸附等温方程可较好地模拟Ni(Ⅱ)在2种土壤中的等温吸附过程,Freundlich吸附等温方程可很好模拟Mn(Ⅱ)黄褐土吸附等温过程;在研究pH范围内,Mn(Ⅱ)的吸附率随pH的增加变化不大,Ni(Ⅱ)的吸附率均随pH的增加而增加,土壤pH对重金属离子解吸影响较大,当pH小于3时有利于重金属离子解吸;通过土壤基本理化性质与吸附参数相关分析,结合吸附前后土壤的红外光谱分析,说明土壤有机质含量对重金属Mn(Ⅱ)和Ni(Ⅱ)的吸附起重要作用,有机质所含官能团对重金属起到一定的化学吸附作用。     

模拟酸雨对土壤重金属镉形态转化的影响

在模拟酸雨作用下,研究了酸雨对不同Cd污染程度下土壤重金属Cd释放和形态分布、转化规律的影响.结果表明,模拟酸雨浸泡土壤后,土壤pH值高于酸雨浸泡前的土壤pH值和模拟酸雨的pH值,表明土壤表面存在质子的消耗,这可能与硫酸根的专性吸附释放羟基和矿物表面的质子化有关.酸雨浸泡土壤能增加土壤活性态Cd的含量,酸雨酸度越大,土壤Cd含量越高,Cd的活化能力越大.当昆山土壤pH值平均由7.20下降到6.42时,Cd的活化率增加了0.34% ～ 3.29%,因此,在昆山土壤酸化严重的背景下,其土壤重金属Cd的活化趋势明显,由重金属Cd释放而对人类和生物造成的风险较大.     

不同pH下两种可变电荷土壤中Cu(II)、Pb(II)和Cd(II)吸附与解吸的比较研究

对两种可变电荷土壤的研宄表明,土壤对Cu(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)的吸附量均随pH的增加而增加,但Cu(Ⅱ)与Pb(Ⅱ)吸附量之间的差值随pH增加而减小,Cu(Ⅱ)和Pb(Ⅱ)与Cd(Ⅱ)吸附量之间的差值随pH增大呈增大趋势.土壤吸附的Cd(Ⅱ)的解吸量随吸附平衡液pH的增加而增加;但Cu(Ⅱ)和Pb(Ⅱ)的解吸量先随pH增加而增加,在某一pH时达最大,随后再逐渐减小.3种重金属离子在可变电荷土壤中吸附和解吸行为的不同特征是pH导致的土壤表面电荷的变化和离子水解程度的变化共同作用的结果.本文的研究结果对可变电荷土壤中重金属的控制和污染土壤的修复具有一定的指导意义.     

黔产薏苡仁及其产地土壤重金属污染的特征

[目的]探明黔产薏苡仁及其产地土壤重金属污染特征,为黔产薏苡仁产业可持续发展及其产地土壤重金属防控提供科学依据.[方法]以黔西南薏苡仁及其产地土壤为供试样品,分析测定土壤pH值、有机质、阳离子交换量(CEC)和5种重金属元素镉(Cd)、铅(Pb)、锌(Zn)、铜(Cu)、镍(Ni)的含量,运用GIS和单因子污染风险评价...     

施加不同种类生物质炭及冻融交替后土壤吸附Cu(Ⅱ)的变化

以棉花和花生秸秆为原料于500℃下限氧慢速热解制备得到两种生物质炭,通过批处理恒温振荡法,探讨了土壤施加不同种类生物质炭及冻融交替后吸附Cu(Ⅱ)的变化。结果表明,Freundlich和Langmuir等温模型均能较好地拟合各处理土壤对Cu(Ⅱ)的吸附,土壤施加棉花和花生秸秆炭后对Cu(Ⅱ)的吸附能力显著提高,吸附能力分别提高了3.8和17.9倍;冻融交替后施加棉花和花生秸秆炭的土壤对Cu(Ⅱ)的吸附能力均降低,吸附能力分别下降了1.6和1.1倍;花生秸秆炭比棉花秸秆炭更适宜作为土壤改良剂修复重金属污染土壤。     

自然水体生物膜对Pb^2＋Zn^2＋的吸附特性

以合肥董铺水库为水源、天然纯棉绳为人工基质培养自然水体生物膜,研究了该生物膜对Pb^2＋和Zn^2＋的吸附特性及其影响因素。结果表明,单一重金属离子体系中,生物膜对两种重金属离子的吸附均符合Freundlich吸附等温式（RP2b=0.9900,RZ2n=0.9989）和Langmuir吸附等温式（RP2b=0.9823,RZ2n=0.9792）;吸附过程符合Langmuir二级动力学方程（RP2b=0.9992,RZ2n=0.9999）;在pH6-7、温度25-30℃的条件下,Pb^2＋和Zn^2＋有较高的去除率;在Pb^2＋-Zn^2＋两元混合体系中,生物膜对Pb^2＋的吸附选择性明显比Zn^2＋强。     

一个新的土壤重金属竞争吸附等温模型

A new competitive adsorption isothermal model (CAIM) was developed for the coexistent and competitive binding of heavy metals to the soil surface. This model extended the earlier adsorption isothermal models by considering more than one kind of ion adsorption on the soil surface. It was compared with the Langmuir model using different conditions, and it was found that CAIM, which was suitable for competitive ion adsorption at the soil solid-liquid surface, had more advantages than the Langmuir model. The new competitive adsorption isothermal model was used to fit the data of heavy metal (Zn and Cd) competitive adsorption by a yellow soil at two temperatures. The results showed that CAIM was appropriate for the competitive adsorption of heavy metals on the soil surface at different temperatures. The fitted parameters of CAIM had explicit physical meaning. The model allowed for the calculation of the standard molar Gibbs free energy change, the standard molar enthalpy change, and the standard molar entropy change of the competitive adsorption of the heavy metals, Zn and Cd, by the yellow soil at two temperatures using the thermodynamic equilibrium constants.     

棉花、花生秸秆生物炭对棕壤中Cu(Ⅱ)运移的影响

[目的]分析棉花、花生生物炭基本理化性质,模拟自然条件下降雨对土壤中Cu(Ⅱ)淋失量的影响,探讨生物炭修复Cu(Ⅱ)污染棕壤的可行性。[方法]以棉花、花生秸秆为原料,采用限氧热解法分别在350,500,650℃下制备生物炭,将生物炭按1%的炭土干重比施入铜污染棕壤[Cu(Ⅱ)的浓度200mg/kg],通过室内土柱淋溶试验分析添加不同生物炭对土壤缓冲性能和吸附能力的影响。[结果]两类生物炭的H/C及O/C的比值随着温度的升高逐渐降低,而生物炭的BET比表面积则随着制备温度的升高而逐渐增大;添加生物炭的土壤淋溶液pH值显著高于空白处理,花生生物炭的效果更为显著;随着淋溶次数的增加,添加生物炭的土壤中Cu(Ⅱ)的淋失量明显低于空白处理;添加花生生物炭提高了土壤中Cu(Ⅱ)的专性吸附,以650℃最为显著。[结论]两种生物炭能明显提高土壤的缓冲性能和对重金属的吸持能力,其中以花生生物炭的效果更为明显。     

玉米秸秆生物炭对Cd（Ⅱ）的吸附机理研究

以玉米秸秆为原料,在350℃和700℃热解温度下分别制备了两种生物炭（BC350和BC700）,并对其理化性质进行了表征。在700℃下制备的生物炭芳构化程度更高,疏水性更强,比表面积更大,孔结构发育更加完全。研究Cd（Ⅱ）在两种生物炭上的吸附发现,Two-site Langmuir吸附等温模型比One-site Langmuir吸附等温模型能更好描述Cd（Ⅱ）在生物炭表面的吸附。BC700对Cd（Ⅱ）的吸附容量大于BC350,解吸率远小于BC350,吸附效果更好;离子交换和阳离子-π作用两种吸附机理同时存在并共同作用,前者分别占BC350和BC700总吸附容量的13.7%和1.1%,后者分别占86.3%和98.9%,阳离子-π作用是最主要的吸附机理。红外光谱FTIR分析表明,生物炭表面的含氧官能团和π共轭芳香结构分别提供不同机理的吸附位点。由于具有更多的离子交换位点,BC350对Cd（Ⅱ）吸附受pH影响较BC700更大。     

Enhanced Heavy Metal Sorption by Surface-Oxidized Activated Carbon Does Not Affect the PAH Sequestration in Sediments

We examined the sorption of heavy metals and polycyclic aromatic hydrocarbons (PAHs) to surface-oxidized activated carbon (AC) and its effect on the distribution of those compounds in sediments. Created surface oxygen groups on AC enhanced the sorption of copper, which is superior in sorption competition, in the marine sediments. In case of cadmium, aqueous chemistry altered by AC addition, such as pH, has greater impact on the bioavailability according to the result of a sequential extraction combined with the pore water concentration measurements. Oxidized AC exhibited 2.3 times more adsorption of reduced bioavailable copper while 23% of bioavailable cadmium was adsorbed onto unmodified AC. No significant changes in BET surface area, pore volume, and AC/water distribution coefficient (K _AC) of PAHs were observed with surface-oxidized AC. The largest difference in K _AC after the oxidation was only 0.14 log unit. Consequently, freely dissolved aqueous concentrations of PAHs were reduced by more than 96% for all tested ACs in a week despite the increased Cu sorption on AC. This indicates that enhanced metal sorption by surface oxidation of AC is less significant in controlling bioavailability of PAHs in sediments than particle size or sorbent dose.     

Eisenia fetida growth inhibition by amended activated carbon causes less bioaccumulation of heavy metals

Purpose

Activated carbons (ACs) were applied to evaluate the effects of surface oxidation on bioavailability and bioaccumulation of cadmium (Cd) and copper (Cu) in freshwater sediment along with Eisenia fetida biomass change.

Materials and methods

A modified sequential extraction procedure was conducted to measure the changes in bioavailable fractions of heavy metals 6 weeks after the addition of nitric acid-oxidized AC. Bioaccumulation of heavy metals in E. fetida was analyzed after 2 weeks of exposure to AC-amended contaminated sediments. Changes in biomass of earthworms caused by AC amendments were observed over 2 weeks of exposure to clean sand.

Results and discussion

Surface oxidation of AC caused little impact on AC surface properties except for oxygen contents leading to enhanced sorption capacity for heavy metals. Bioavailable fractions of the heavy metals increased after 6 weeks, and less was bioavailable with various ACs than without AC. The earthworms were exposed to the sediments mixed with ACs for 6 weeks. After 2 weeks of exposure, bioaccumulation of Cd and Cu decreased drastically. More than 76 % of Cd and 80 % of Cu reductions were observed with each type and dose of AC. Weight loss of E. fetida incubated in clean sand for 13 days after AC amendments was observed, but was not affected by surface oxidation.

Conclusions

Inhibited growth of E. fetida due to AC could be responsible for the reduced bioaccumulation of Cd and Cu in the earthworms as AC inhibited the movement of earthworms, leading to less bioturbation and decreased consumption of nutrients.     

Competitive sorption of cadmium and lead in acid soils of Central Spain

The bioavailability and ultimate fate of heavy metals in the environment are controlled by chemical sorption. To assess competitive sorption of Pb and Cd, batch equilibrium experiments (generating sorption isotherms) and kinetics sorption studies were performed using single and binary metal solutions in surface samples of four soils from central Spain. For comparisons between soils, as well as, single and binary metal solutions, soil chemical processes were characterized using the Langmuir equation, ionic strength, and an empirical power function for kinetic sorption. In addition, soil pH and clay mineralogy were used to explain observed sorption processes. Sorption isotherms were well described by the Langmuir equation and the sorption kinetics were well described by an empirical power function within the reaction times in this study. Soils with higher pH and clay content (characterized by having smectite) had the greatest sorption capacity as estimated by the maximum sorption parameter (Q) of the Langmuir equation. All soils exhibited greater sorption capacity for Pb than Cd and the presence of both metals reduced the tendency for either to be sorbed although Cd sorption was affected to a greater extent than that of Pb. The Langmuir binding strength parameter (k) was always greater for Pb than for Cd. However, these k values tended to increase as a result of the simultaneous presence of both metals that may indicate competition for sorption sites promoting the retention of both metals on more specific sorption sites. The kinetic experiments showed that Pb sorption is initially faster than Cd sorption from both single and binary solutions although the simultaneous presence of both metals affected the sorption of Cd at short times while only a minor effect was observed on Pb. The estimated exponents of the kinetic function were in all cases smaller for Pb than for Cd, likely due to diffusion processes into micropores or interlayer space of the clay minerals which occurs more readily for Cd than Pb. Finally, the overall sorption processes of Pb and Cd in the smectitic soil with the highest sorption capacity of the studied soils are slower than in the rest of the soils with a clay mineralogy dominated by kaolinite and illite, exhibiting these soils similar sorption rates. These results demonstrate a significant interaction between Pb and Cd sorption when both metals are present that depends on important soil properties such as the clay mineralogy.     

玉米秸秆水溶性物质对白浆土吸附锌离子的影响

应用平衡吸附法,研究外源玉米秸秆水溶性物质(WSS)对白浆土吸附Zn2+的影响,影响因素主要包括温度(298 K和318 K)、WSS浓度和接触时间(1～1 440 min)。结果表明:(1)不同温度条件影响下,白浆土对Zn2+的吸附热力学曲线主要包括起始的快速升高、中间的吸附平台和继续升高直至平衡3个阶段,经历电性吸附向配位吸附转变,最终促使二者共存。Langmuir方程能较好描述白浆土对Zn2+的吸附特征,升高温度有利于提高白浆土对Zn2+的最大缓冲容量,另外,白浆土对Zn2+的吸附是非自发、吸热且混乱度增加的过程。(2)玉米秸秆WSS的加入可有效抑制白浆土对Zn2+的吸附固定,减少两者的亲和力,降低白浆土对Zn2+的吸附强度,增大Zn2+在土壤溶液中的移动,有利于提高其植物有效性。(3)随玉米秸秆WSS浓度的增大,白浆土对Zn2+的吸附强度逐渐降低,可采用线性方程较好描述。(4)白浆土对Zn2+的动力学吸附主要包括短期快速吸附和长期慢速吸附两个阶段,第一阶段两个处理的吸附率分别达79.51%和96.80%。玉米秸秆WSS的加入可有效提高短期快速吸附阶段白浆土对Zn2+的吸附率,但同时WSS的加入却减少了白浆土对Zn2+的吸附固定。Elovich和双常数方程描述白浆土对Zn2+的吸附有较为明显的优势,WSS的添加扰乱了白浆土对Zn2+的动力学吸附过程。     

Response of the sorption behavior of Cu,Cd, and Zn to different soil management

This study investigated the effect of different farming practices over long time periods on the sorption‐desorption behavior of Cu, Cd, and Zn in soils. Various amendments in a long‐term field experiment over 44 y altered the chemical and physical properties of the soil. Adsorption isotherms obtained from batch sorption experiments with Cu, Cd, and Zn were well described by Freundlich equations for adsorption and desorption. The data showed that Cu was adsorbed in high amounts, followed by Zn and Cd. In most treatments, Cd ions were more weakly sorbed than Cu or Zn. Generally, adsorption coefficients K_F increased among the investigated farming practices in the following order: sewage sludge ≤ fallow < inorganic fertilizer without N ≈ green manure < peat < Ca(NO₃)₂ < animal manure ≤ grassland/extensive pasture. The impact of different soil management on the sorption properties of agricultural soils for trace metals was quantified. Results demonstrated that the soil pH was the main factor controlling the behavior of heavy metals in soil altered through management. Furthermore, the constants K_F and n of isotherms obtained from the experiments significantly correlated with the amount of solid and water‐soluble organic carbon (WSOC) in the soils. Higher soil pH and higher contents of soil organic carbon led to higher adsorption. Carboxyl and carbonyl groups as well as WSOC significantly influenced the sorption behavior of heavy metals in soils with similar mineral soil constituents.