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| 1 | 水化氯铝酸钙与传统钝化剂降低土壤镉生态及健康风险的对比研究显示文摘针对红壤、棕壤、褐土、黑土4种中国典型的Cd污染土壤,应用Ca(OH)_(2)、Ca(H_(2)PO_(4))_(2)以及层状双金属氢氧化物(Layered Double Hydroxides,LDHs)、水化氯铝酸钙(CaAl-Cl LDH)开展钝化修复,并从土壤Cd的生态风险和健康风险角度进行修复效果对比研究。分析钝化剂对土壤pH值、土壤Cd的赋存形态以及土壤Cd直接经口摄入的生物可给性的影响,并对修复机理进行深入探究。结果表明,在Ca(OH)_(2)、Ca(H_(2)PO_(4))_(2)和CaAl-Cl LDH各自相对最优施用量下,3种钝化剂均可显著降低土壤Cd的活性系数(P<0.05),平均降幅分别为16.1%、56.9%和29.2%,可降低土壤Cd的作物吸收量及Cd对周边生态环境的风险。此外,施用CaAl-Cl LDH能显著且更为有效地降低土壤Cd的生物可给性(P<0.05)及Cd对人体的健康风险,在胃和小肠阶段的平均降幅为19.2%和33.0%,其中胃阶段分别达到施用Ca(OH)_(2)和Ca(H_(2)PO_(4))_(2)的3.11和1.99倍,小肠阶段为5.99和2.72倍。该研究为Cd污染土壤钝化修复剂的开发、改进和选择提供了科学依据和参考。 | 陈晓晨 黄艺佳 赵桐 张福祥 赵琦 陈禹西 张剑宇 张旭钏 肖艳春 杨桂芳 | 2022 | 农业工程学报2022，38，19： | 3 |
| 2 | 钙铝沉淀法除氯及沉淀再应用的研究进展显示文摘钙铝沉淀法去除水系中的氯离子因其原料价格低廉、毒性低,有良好的工业应用前景和推广价值。介绍了钙铝沉淀法去除氯离子的原理,总结了其研究进展,并对该法所得的沉淀剂的回收再利用进行归纳总结,以期为钙铝沉淀法除氯在工业装置中的实际应用提供相应的理论支持。 | 卢勇 赵彦龙 孙耀华 王海 徐成 | 2021 | 安徽化工2021，47，5： | 2 |
| 3 | Succinate-bonded pullulan: An efficient and reusable super-sorbent for cadmium-uptake from spiked high-hardness groundwater显示文摘Chemically modified pullulan was evaluated for its sorption efficiency and selectivity to remove cadmium(Cd) from spiked high-hardness groundwater(GW). Pullulan esterified with succinic anhydride using dimethylaminopyridine showed a fairly high degree of substitution value as confirmed by1 H NMR spectroscopy. Pullulan succinate(Pull-Suc) was converted into the sodium salt(Pull-Suc-Na). The effect of contact time(5–200 min) and p H(2–8) on Cd-uptake by the sorbent(Pull-Suc-Na) was investigated. The sorbent showed more than 90% Cd-removal in first 15 min from distilled water(DW) and GW solution,respectively. Comparison of Pull-Suc-Na with other polysaccharidal sorbents suggested its high efficiency(DW 476.2 mg/g and GW 454.5 mg/g) and selectivity for the removal of Cd by an ion exchange mechanism, which is further supported by the negative Gibbs free energy values calculated from Langmuir isotherms. A Langmuir isotherm kinetic model provided the best fit for the sorption of Cd using Pull-Suc-Na. The sorbent showed a negligible decrease in Cd-uptake over three regeneration cycles. The thermal stability testing of the sorbents indicated that Pull-Suc-Na(sorbent) is more stable than Pull-Suc. | Azhar Abbas Muhammad Ajaz Hussain Muhammad Amin Muhammad Sher Muhammad Nawaz Tahir Wolfgang Tremel | 2015 | Journal of Environmental Sciences2015，27，11： | 1 |
| 4 | 冶金渣胶凝材料对镉离子的固化性能研究显示文摘以钢渣、矿渣和脱硫石膏为原料制备胶凝材料,研究了其对镉离子的固化效果。研究结果表明:在Cd^(2+)浓度不高于30 mg/kg时,胶凝材料对镉离子吸附效果较好,主要是因为镉离子能够以“类质同象”的方式替代Ca2+进入钙矾石(AFt)的晶格和Friedel盐,形成含镉复盐而被固化,再加上C-S-H对镉的吸附作用,共同促使Cd^(2+)被高效固化。研究结果对于含镉废水的治理具有重要意义。 | 崔孝炜 邓惋心 谢宇轩 王乐 | 2021 | 矿产保护与利用2021，41，1： | 1 |
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